Transcript
BRAKES
SECTION
BRC
BRAKE CONTROL SYSTEM
A
B
C
D
E
CONTENTS VDC/TCS/ABS
Component Parts Location ......................................19 Component Description ...........................................21
BASIC INSPECTION .................................... 4 DIAGNOSIS AND REPAIR WORKFLOW .......... 4 Work Flow ................................................................. 4 Diagnostic Work Sheet .............................................. 7
INSPECTION AND ADJUSTMENT ..................... 8 ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT .......................................................... 8 ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description .................................. 8 ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement ...... 8 ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION .................................................. 8 ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description .......................... 8 ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement .......................................................................... 8
FUNCTION DIAGNOSIS .............................. 10 VDC ....................................................................10 System Diagram ...................................................... 10 System Description ................................................. 10 Component Parts Location ...................................... 11 Component Description ........................................... 13
TCS .....................................................................14 System Diagram ...................................................... 14 System Description ................................................. 14 Component Parts Location ...................................... 15 Component Description ........................................... 17
ABS ....................................................................18 System Diagram ...................................................... 18 System Description ................................................. 18
Revision: 2007 June
EBD ................................................................... 22 System Diagram ......................................................22 System Description ..................................................22 Component Parts Location ......................................23 Component Description ...........................................25
DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)] ....... 26 CONSULT-III Function ............................................26
COMPONENT DIAGNOSIS ......................... 31
BRC
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C1101, C1102, C1103, C1104 WHEEL SENSOR-1 ................................................................ 31 Description ...............................................................31 DTC Logic ................................................................31 Diagnosis Procedure ...............................................31 Component Inspection .............................................33 Special Repair Requirement ....................................33
C1105, C1106, C1107, C1108 WHEEL SENSOR-2 ................................................................ 34
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L
M
Description ...............................................................34 DTC Logic ................................................................34 Diagnosis Procedure ...............................................34 Component Inspection .............................................36 Special Repair Requirement ....................................36
N
C1109 POWER AND GROUND SYSTEM ........ 37
O
Description ...............................................................37 DTC Logic ................................................................37 Diagnosis Procedure ...............................................37 Special Repair Requirement ....................................38
C1110, C1153, C1170 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) ................. 39 DTC Logic ................................................................39 Diagnosis Procedure ...............................................39 Special Repair Requirement ....................................39
BRC-1
G37 Coupe
P
C1111 ABS MOTOR, MOTOR RELAY SYSTEM .................................................................... 40 Description .............................................................. 40 DTC Logic ............................................................... 40 Diagnosis Procedure .............................................. 40 Component Inspection ............................................ 41 Special Repair Requirement ................................... 41
C1114 ACTUATOR RELAY SYSTEM ............... 42 Description .............................................................. 42 DTC Logic ............................................................... 42 Diagnosis Procedure .............................................. 42 Component Inspection ............................................ 43 Special Repair Requirement ................................... 43
C1115 WHEEL SENSOR ................................... 44 Description .............................................................. 44 DTC Logic ............................................................... 44 Diagnosis Procedure .............................................. 44 Component Inspection ............................................ 45 Special Repair Requirement ................................... 46
C1116 STOP LAMP SWITCH ............................ 47 Description .............................................................. 47 DTC Logic ............................................................... 47 Diagnosis Procedure .............................................. 47 Component Inspection ............................................ 48 Special Repair Requirement ................................... 48
C1120, C1122, C1124, C1126 IN ABS SOL ..... 49 Description .............................................................. 49 DTC Logic ............................................................... 49 Diagnosis Procedure .............................................. 49 Component Inspection ............................................ 50 Special Repair Requirement ................................... 51
C1121, C1123, C1125, C1127 OUT ABS SOL... 52 Description .............................................................. 52 DTC Logic ............................................................... 52 Diagnosis Procedure .............................................. 52 Component Inspection ............................................ 53 Special Repair Requirement ................................... 54
C1130, C1131, C1132 ENGINE SIGNAL .......... 55 Description .............................................................. 55 DTC Logic ............................................................... 55 Diagnosis Procedure .............................................. 55 Special Repair Requirement ................................... 55
C1138 4WAS SYSTEM ...................................... 56 Description .............................................................. 56 DTC Logic ............................................................... 56 Diagnosis Procedure .............................................. 56 Special Repair Requirement ................................... 56
C1142 PRESS SENSOR ................................... 57 Description .............................................................. 57 DTC Logic ............................................................... 57 Diagnosis Procedure .............................................. 57 Component Inspection ............................................ 58 Special Repair Requirement ................................... 58
Revision: 2007 June
C1143, C1144 STEERING ANGLE SENSOR ... 59 Description .............................................................. 59 DTC Logic ............................................................... 59 Diagnosis Procedure ............................................... 59 Component Inspection ............................................ 60 Special Repair Requirement ................................... 60
C1145, C1146 YAW RATE/SIDE G SENSOR... 61 Description .............................................................. 61 DTC Logic ............................................................... 61 Diagnosis Procedure ............................................... 61 Component Inspection ............................................ 62 Special Repair Requirement ................................... 63
C1147, C1148, C1149, C1150 USV/HSV LINE... 64 Description .............................................................. 64 DTC Logic ............................................................... 64 Diagnosis Procedure ............................................... 64 Component Inspection ............................................ 65 Special Repair Requirement ................................... 66
C1155 BRAKE FLUID LEVEL SWITCH ........... 67 Description .............................................................. 67 DTC Logic ............................................................... 67 Diagnosis Procedure ............................................... 67 Component Inspection ............................................ 68 Special Repair Requirement ................................... 68
C1185 ICC UNIT ................................................ 69 Description .............................................................. 69 DTC Logic ............................................................... 69 Diagnosis Procedure ............................................... 69 Special Repair Requirement ................................... 69
U1000, U1002 CAN COMM CIRCUIT ............... 70 Description .............................................................. 70 DTC Logic ............................................................... 70 Diagnosis Procedure ............................................... 70 Special Repair Requirement ................................... 70
PARKING BRAKE SWITCH .............................. 71 Description .............................................................. 71 Component Function Check ................................... 71 Diagnosis Procedure ............................................... 71 Component Inspection ............................................ 72
VDC OFF SWITCH ............................................ 73 Description .............................................................. 73 Component Function Check ................................... 73 Diagnosis Procedure ............................................... 73 Component Inspection ............................................ 74
ABS WARNING LAMP ...................................... 75 Description .............................................................. 75 Component Function Check ................................... 75 Diagnosis Procedure ............................................... 75
BRAKE WARNING LAMP ................................. 76 Description .............................................................. 76 Component Function Check ................................... 76 Diagnosis Procedure ............................................... 76
BRC-2
G37 Coupe
VDC OFF INDICATOR LAMP ............................77
PRECAUTION .............................................. 97
Description .............................................................. 77 Component Function Check .................................... 77 Diagnosis Procedure ............................................... 77
PRECAUTIONS ................................................. 97
Description .............................................................. 78 Component Function Check .................................... 78 Diagnosis Procedure ............................................... 78
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" .................................................................97 Precaution for Procedure without Cowl Top Cover....97 Precaution for Brake System ...................................97 Precaution for Brake Control ...................................98
ECU DIAGNOSIS ......................................... 79
PREPARATION ........................................... 99
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) ..............................................79
PREPARATION ................................................. 99
SLIP INDICATOR LAMP ....................................78
A
B
C
D
Special Service Tool ................................................99 Commercial Service Tool ........................................99
Reference Value ..................................................... 79 Wiring Diagram - BRAKE CONTROL SYSTEM -.... 83 Fail-Safe .................................................................. 87 DTC No. Index ........................................................ 88
ON-VEHICLE REPAIR ............................... 100
SYMPTOM DIAGNOSIS .............................. 90
Exploded View ....................................................... 100 Removal and Installation ....................................... 100
EXCESSIVE ABS FUNCTION OPERATION FREQUENCY .....................................................90
SENSOR ROTOR ............................................ 101
G
FRONT SENSOR ROTOR ....................................... 101 FRONT SENSOR ROTOR : Exploded View ......... 101 FRONT SENSOR ROTOR : Removal and Installation ...................................................................... 101
H
Diagnosis Procedure ............................................... 90
UNEXPECTED PEDAL REACTION ..................91 Diagnosis Procedure ............................................... 91
THE BRAKING DISTANCE IS LONG ................92
E
WHEEL SENSOR ............................................ 100
Diagnosis Procedure ............................................... 93
REAR SENSOR ROTOR ......................................... 101 REAR SENSOR ROTOR : Exploded View ............ 101 REAR SENSOR ROTOR : Removal and Installation ......................................................................... 101
PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS ..............................................94
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) ........................................... 102
Diagnosis Procedure ............................................... 92
ABS FUNCTION DOES NOT OPERATE ...........93
Diagnosis Procedure ............................................... 94
Exploded View ....................................................... 102 Removal and Installation ....................................... 102
VEHICLE JERKS DURING VDC/TCS/ABS CONTROL ..........................................................95
YAW RATE/SIDE G SENSOR ........................ 104
Diagnosis Procedure ............................................... 95
NORMAL OPERATING CONDITION .................96 Description .............................................................. 96
BRC
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J
K
Exploded View ....................................................... 104 Removal and Installation ....................................... 104
L
STEERING ANGLE SENSOR ......................... 105
M
Exploded View ....................................................... 105 Removal and Installation ....................................... 105
N
O
P
Revision: 2007 June
BRC-3
G37 Coupe
DIAGNOSIS AND REPAIR WORKFLOW [VDC/TCS/ABS]
< BASIC INSPECTION >
BASIC INSPECTION DIAGNOSIS AND REPAIR WORKFLOW Work Flow
INFOID:0000000001635017
PRECAUTIONS FOR DIAGNOSIS If steering angle sensor, steering system parts, suspension system parts, 4WAS system parts, ABS actuator and electric unit (control unit) or tires have been replaced, or if wheel alignment has been adjusted, be sure to adjust neutral position of steering angle sensor before driving. Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description".
Revision: 2007 June
BRC-4
G37 Coupe
DIAGNOSIS AND REPAIR WORKFLOW [VDC/TCS/ABS]
< BASIC INSPECTION > OVERALL SEQUENCE
A
B
C
D
E
BRC
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DETAILED FLOW
1.COLLECT THE INFORMATION FROM THE CUSTOMER Get the detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred) using the diagnosis worksheet. Refer to BRC-7, "Diagnostic Work Sheet". >> GO TO 2. Revision: 2007 June
BRC-5
G37 Coupe
DIAGNOSIS AND REPAIR WORKFLOW [VDC/TCS/ABS]
< BASIC INSPECTION >
2.PERFORM THE SELF-DIAGNOSIS Check the DTC display with the self-diagnosis function. Is there any DTC displayed? YES >> GO TO 3. NO >> GO TO 4.
3.PERFORM THE SYSTEM DIAGNOSIS Perform the diagnosis applicable to the displayed DTC. Refer to BRC-88, "DTC No. Index". >> GO TO 7.
4.CHECK THE SYMPTOM THAT IS NOT CONSIDERED A SYSTEM MALFUNCTION Check that the symptom is a normal operation that is not considered a system malfunction. Refer to BRC-96, "Description". Is the symptom a normal operation? YES >> INSPECTION END NO >> GO TO 5.
5.CHECK THE WARNING LAMP AND INDICATOR LAMP FOR ILLUMINATION Check that the warning lamp and indicator lamp illuminate. • ABS warning lamp: Refer to BRC-75, "Description". • Brake warning lamp: Refer to BRC-76, "Description". • VDC OFF indicator lamp: Refer to BRC-77, "Description". • SLIP indicator lamp: Refer to BRC-78, "Description". Is ON/OFF timing normal? YES >> GO TO 6. NO >> GO TO 2.
6.PERFORM THE DIAGNOSIS BY SYMPTOM Perform the diagnosis applicable to the symptom. >> GO TO 7.
7.REPAIR OR REPLACE THE MALFUNCTIONING PARTS Repair or replace the specified malfunctioning parts. >> GO TO 8.
8.FINAL CHECK Perform the self-diagnosis again, and check that the malfunction is repaired completely. After checking, erase the self-diagnosis memory. Refer to BRC-26, "CONSULT-III Function". Is no other DTC present and the repair completed? YES >> INSPACTION END NO >> GO TO 3.
Revision: 2007 June
BRC-6
G37 Coupe
DIAGNOSIS AND REPAIR WORKFLOW [VDC/TCS/ABS]
< BASIC INSPECTION >
Diagnostic Work Sheet
INFOID:0000000001635018
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B
C
D
E
BRC
G
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SFIA3265E
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Revision: 2007 June
BRC-7
G37 Coupe
INSPECTION AND ADJUSTMENT [VDC/TCS/ABS]
< BASIC INSPECTION >
INSPECTION AND ADJUSTMENT ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description INFOID:0000000001635019
After replacing the ABS actuator and electric unit (control unit), perform the neutral position adjustment for the steering angle sensor.
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement
INFOID:0000000001635020
1.PERFORM THE NEUTRAL POSITION ADJUSTMENT FOR THE STEERING ANGLE SENSOR Perform the neutral position adjustment for the steering angle sensor. >> Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement".
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description INFOID:0000000001635021
In case of doing work that applies to the list below, make sure to adjust neutral position of steering angle sensor before running vehicle. ×: Required –: Not required
Situation
Adjustment of steering angle sensor neutral position
Removing/Installing ABS actuator and electric unit (control unit)
—
Replacing ABS actuator and electric unit (control unit)
×
Removing/Installing steering angle sensor
×
Replacing steering angle sensor
×
Removing/Installing 4WAS components
×
Replacing 4WAS components
×
Removing/Installing steering components
×
Replacing steering components
×
Removing/Installing suspension components
×
Replacing suspension components
×
Change tires to new ones
—
Tire rotation
—
Adjusting wheel alignment
×
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement
INFOID:0000000001635022
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION CAUTION: To adjust neutral position of steering angle sensor, make sure to use CONSULT-III. (Adjustment cannot be done without CONSULT-III.)
1.ALIGN THE VEHICLE STATUS Stop vehicle with front wheels in straight-ahead position. >> GO TO 2.
2.PERFORM THE NEUTRAL POSITION ADJUSTMENT FOR THE STEERING ANGLE SENSOR Revision: 2007 June
BRC-8
G37 Coupe
INSPECTION AND ADJUSTMENT [VDC/TCS/ABS] < BASIC INSPECTION > 1. On the CONSULT-III screen, touch "WORK SUPPORT" and “ST ANG SEN ADJUSTMENT" in order. 2. Touch “START”. CAUTION: Do not touch steering wheel while adjusting steering angle sensor. 3. After approximately 10 seconds, touch “END”. NOTE: After approximately 60 seconds, it ends automatically. 4. Turn ignition switch OFF, then turn it ON again. CAUTION: Be sure to perform above operation.
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>> GO TO 3.
3.CHECK DATA MONITOR 1. Run vehicle with front wheels in straight-ahead position, then stop. 2. Select “DATA MONITOR”. Then make sure “STR ANGLE SIG” is within 0±2.5°. Is the steering angle within the specified range? YES >> GO TO 4. NO >> Perform the neutral position adjustment for the steering angle sensor again, GO TO 1.
E
BRC
4.ERASE THE SELF-DIAGNOSIS MEMORY Erase the self-diagnosis memories of the ABS actuator and electric unit (control unit), ECM, 4WAS and ICC. • ABS actuator and electric unit (control unit): Refer to BRC-26, "CONSULT-III Function". • ECM: Refer to EC-120, "CONSULT-III Function". • 4WAS - 4WAS FRONT CONTROL UNIT: Refer to STC-39, "CONSULT-III Function [4WAS(FRONT)]". - 4WAS MAIN CONTROL UNIT: Refer to STC-43, "CONSULT-III Function [4WAS(MAIN)/RAS/HICAS]". • ICC: Refer to CCS-23, "CONSULT-III Function (ICC)". Are the memories erased? YES >> INSPECTION END NO >> Check the items indicated by the self-diagnosis.
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Revision: 2007 June
BRC-9
G37 Coupe
VDC [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS >
FUNCTION DIAGNOSIS VDC System Diagram
INFOID:0000000001635023
JSFIA0124GB
System Description
INFOID:0000000001635024
• Vehicle Dynamics Control system detects driver′s steering operation amount and brake pedal travel from steering angle sensor and pressure sensor. Using information from yaw rate/side G sensor and wheel sensor, VDC judges driving condition (conditions of under steer and over steer) to improve vehicle driving stability by controlling brake application to 4 wheels and engine output. • During VDC operation, it informs driver of system operation by flashing SLIP indicator lamp. • Electrical system diagnosis by CONSULT-III is available.
Revision: 2007 June
BRC-10
G37 Coupe
VDC [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS >
Component Parts Location
INFOID:0000000001635025
A
For USA B
C
D
E
BRC
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1.
Steering angle sensor
2.
ABS warning lamp
3.
Brake warning lamp
4.
VDC OFF indicator lamp
5.
SLIP indicator lamp
6.
ABS actuator and electric unit (control unit)
Revision: 2007 June
BRC-11
G37 Coupe
VDC [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS > 7.
Front wheel sensor
8.
Yaw rate/side G sensor
9.
VDC OFF switch
Back of spiral cable assembly
B.
Combination meter
C.
Inside brake master cylinder cover
D.
Steering knuckle
E.
Under center console
F.
Instrument driver lower panel
G.
Rear final drive assembly
10. Rear wheel sensor A.
For Canada
JSFIA0126ZZ
Revision: 2007 June
BRC-12
G37 Coupe
VDC [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS > 1.
Steering angle sensor
2.
ABS warning lamp
3.
Brake warning lamp
4.
VDC OFF indicator lamp
5.
SLIP indicator lamp
6.
ABS actuator and electric unit (control unit)
7.
Front wheel sensor
8.
Yaw rate/side G sensor
9.
VDC OFF switch
A
B
10. Rear wheel sensor A.
Back of spiral cable assembly
B.
Combination meter
C.
Inside brake master cylinder cover
D.
Steering knuckle
E.
Under center console
F.
Instrument driver lower panel
G.
Rear final drive assembly
Component Description
INFOID:0000000001635026
Component parts
Reference
Pump
D
E
BRC-40, "Description"
Motor ABS actuator and electric unit (control unit)
C
Actuator relay (Main relay)
BRC-42, "Description"
Solenoid valve
BRC-49, "Description"
Pressure sensor
BRC-57, "Description"
VDC switch-over valve (USV1, USV2, HSV1, HSV2)
BRC-64, "Description"
Wheel sensor
BRC-31, "Description"
Yaw rate/side G sensor
BRC-61, "Description"
Steering angle sensor
BRC-59, "Description"
VDC OFF switch
BRC-73, "Description"
ABS warning lamp
BRC-75, "Description"
Brake warning lamp
BRC-76, "Description"
VDC OFF indicator lamp
BRC-77, "Description"
SLIP indicator lamp
BRC-78, "Description"
BRC
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Revision: 2007 June
BRC-13
G37 Coupe
TCS [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS >
TCS System Diagram
INFOID:0000000001645292
JSFIA0124GB
System Description
INFOID:0000000001635028
• Traction Control System is a function that electronically controls engine torque, brake fluid pressure and A/T gear position to ensure the optimum slippage ratio at drive wheels by computing wheel speed signals from 4 wheel sensors. When ABS actuator and electric unit (control unit) detects a spin at drive wheels (rear wheels), it compares wheel speed signals from all 4 wheels. At this time, LH and RH rear brake fluid pressure are controlled, while fuel being cut to engine and throttle valve being closed to reduce engine torque by the control unit. Further more, throttle position is continuously controlled to ensure the optimum engine torque at all times. • During TCS operation, it informs driver of system operation by flashing SLIP indicator lamp. • Electrical system diagnosis by CONSULT-III is available.
Revision: 2007 June
BRC-14
G37 Coupe
TCS [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS >
Component Parts Location
INFOID:0000000001645293
A
For USA B
C
D
E
BRC
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P JSFIA0125ZZ
1.
Steering angle sensor
2.
ABS warning lamp
3.
Brake warning lamp
4.
VDC OFF indicator lamp
5.
SLIP indicator lamp
6.
ABS actuator and electric unit (control unit)
Revision: 2007 June
BRC-15
G37 Coupe
TCS [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS > 7.
Front wheel sensor
8.
Yaw rate/side G sensor
9.
VDC OFF switch
Back of spiral cable assembly
B.
Combination meter
C.
Inside brake master cylinder cover
D.
Steering knuckle
E.
Under center console
F.
Instrument driver lower panel
G.
Rear final drive assembly
10. Rear wheel sensor A.
For Canada
JSFIA0126ZZ
Revision: 2007 June
BRC-16
G37 Coupe
TCS [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS > 1.
Steering angle sensor
2.
ABS warning lamp
3.
Brake warning lamp
4.
VDC OFF indicator lamp
5.
SLIP indicator lamp
6.
ABS actuator and electric unit (control unit)
7.
Front wheel sensor
8.
Yaw rate/side G sensor
9.
VDC OFF switch
A
B
10. Rear wheel sensor A.
Back of spiral cable assembly
B.
Combination meter
C.
Inside brake master cylinder cover
D.
Steering knuckle
E.
Under center console
F.
Instrument driver lower panel
G.
Rear final drive assembly
Component Description
INFOID:0000000001645294
Component parts
Reference
Pump
D
E
BRC-40, "Description"
Motor ABS actuator and electric unit (control unit)
C
Actuator relay (Main relay)
BRC-42, "Description"
Solenoid valve
BRC-49, "Description"
Pressure sensor
BRC-57, "Description"
VDC switch-over valve (USV1, USV2, HSV1, HSV2)
BRC-64, "Description"
Wheel sensor
BRC-31, "Description"
Yaw rate/side G sensor
BRC-61, "Description"
Steering angle sensor
BRC-59, "Description"
VDC OFF switch
BRC-73, "Description"
ABS warning lamp
BRC-75, "Description"
Brake warning lamp
BRC-76, "Description"
VDC OFF indicator lamp
BRC-77, "Description"
SLIP indicator lamp
BRC-78, "Description"
BRC
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Revision: 2007 June
BRC-17
G37 Coupe
ABS [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS >
ABS System Diagram
INFOID:0000000001645295
JSFIA0124GB
System Description
INFOID:0000000001635032
• Anti-Lock Braking System is a function that detects wheel revolution while braking, electronically controls braking force, and prevents wheel locking during sudden braking. It improves handling stability and maneuverability for avoiding obstacles. • Electrical system diagnosis by CONSULT-III is available.
Revision: 2007 June
BRC-18
G37 Coupe
ABS [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS >
Component Parts Location
INFOID:0000000001645296
A
For USA B
C
D
E
BRC
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P JSFIA0125ZZ
1.
Steering angle sensor
2.
ABS warning lamp
3.
Brake warning lamp
4.
VDC OFF indicator lamp
5.
SLIP indicator lamp
6.
ABS actuator and electric unit (control unit)
Revision: 2007 June
BRC-19
G37 Coupe
ABS [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS > 7.
Front wheel sensor
8.
Yaw rate/side G sensor
9.
VDC OFF switch
Back of spiral cable assembly
B.
Combination meter
C.
Inside brake master cylinder cover
D.
Steering knuckle
E.
Under center console
F.
Instrument driver lower panel
G.
Rear final drive assembly
10. Rear wheel sensor A.
For Canada
JSFIA0126ZZ
Revision: 2007 June
BRC-20
G37 Coupe
ABS [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS > 1.
Steering angle sensor
2.
ABS warning lamp
3.
Brake warning lamp
4.
VDC OFF indicator lamp
5.
SLIP indicator lamp
6.
ABS actuator and electric unit (control unit)
7.
Front wheel sensor
8.
Yaw rate/side G sensor
9.
VDC OFF switch
A
B
10. Rear wheel sensor A.
Back of spiral cable assembly
B.
Combination meter
C.
Inside brake master cylinder cover
D.
Steering knuckle
E.
Under center console
F.
Instrument driver lower panel
G.
Rear final drive assembly
Component Description
INFOID:0000000001645297
Component parts
Reference
Pump
D
E
BRC-40, "Description"
Motor ABS actuator and electric unit (control unit)
C
Actuator relay (Main relay)
BRC-42, "Description"
Solenoid valve
BRC-49, "Description"
Pressure sensor
BRC-57, "Description"
VDC switch-over valve (USV1, USV2, HSV1, HSV2)
BRC-64, "Description"
Wheel sensor
BRC-31, "Description"
Yaw rate/side G sensor
BRC-61, "Description"
Steering angle sensor
BRC-59, "Description"
VDC OFF switch
BRC-73, "Description"
ABS warning lamp
BRC-75, "Description"
Brake warning lamp
BRC-76, "Description"
VDC OFF indicator lamp
BRC-77, "Description"
SLIP indicator lamp
BRC-78, "Description"
BRC
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Revision: 2007 June
BRC-21
G37 Coupe
EBD [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS >
EBD System Diagram
INFOID:0000000001645300
JSFIA0124GB
System Description
INFOID:0000000001635036
• Electric Brake force Distribution is a following function. ABS actuator and electric unit (control unit) detects subtle slippages between the front and rear wheels during braking. Then is electronically controls the rear braking force (brake fluid pressure) to reducing and reduces rear wheel slippage. Accordingly it improves vehicle stability. • Electrical system diagnosis by CONSULT-III is available.
Revision: 2007 June
BRC-22
G37 Coupe
EBD [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS >
Component Parts Location
INFOID:0000000001645298
A
For USA B
C
D
E
BRC
G
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P JSFIA0125ZZ
1.
Steering angle sensor
2.
ABS warning lamp
3.
Brake warning lamp
4.
VDC OFF indicator lamp
5.
SLIP indicator lamp
6.
ABS actuator and electric unit (control unit)
Revision: 2007 June
BRC-23
G37 Coupe
EBD [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS > 7.
Front wheel sensor
8.
Yaw rate/side G sensor
9.
VDC OFF switch
Back of spiral cable assembly
B.
Combination meter
C.
Inside brake master cylinder cover
D.
Steering knuckle
E.
Under center console
F.
Instrument driver lower panel
G.
Rear final drive assembly
10. Rear wheel sensor A.
For Canada
JSFIA0126ZZ
Revision: 2007 June
BRC-24
G37 Coupe
EBD [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS > 1.
Steering angle sensor
2.
ABS warning lamp
3.
Brake warning lamp
4.
VDC OFF indicator lamp
5.
SLIP indicator lamp
6.
ABS actuator and electric unit (control unit)
7.
Front wheel sensor
8.
Yaw rate/side G sensor
9.
VDC OFF switch
A
B
10. Rear wheel sensor A.
Back of spiral cable assembly
B.
Combination meter
C.
Inside brake master cylinder cover
D.
Steering knuckle
E.
Under center console
F.
Instrument driver lower panel
G.
Rear final drive assembly
Component Description
INFOID:0000000001645299
Component parts
Reference
Pump
D
E
BRC-40, "Description"
Motor ABS actuator and electric unit (control unit)
C
Actuator relay (Main relay)
BRC-42, "Description"
Solenoid valve
BRC-49, "Description"
Pressure sensor
BRC-57, "Description"
VDC switch-over valve (USV1, USV2, HSV1, HSV2)
BRC-64, "Description"
Wheel sensor
BRC-31, "Description"
Yaw rate/side G sensor
BRC-61, "Description"
Steering angle sensor
BRC-59, "Description"
VDC OFF switch
BRC-73, "Description"
ABS warning lamp
BRC-75, "Description"
Brake warning lamp
BRC-76, "Description"
VDC OFF indicator lamp
BRC-77, "Description"
SLIP indicator lamp
BRC-78, "Description"
BRC
G
H
I
J
K
L
M
N
O
P
Revision: 2007 June
BRC-25
G37 Coupe
DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)] [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)] CONSULT-III Function
INFOID:0000000001635039
FUNCTION CONSULT-III can display each diagnostic item using the diagnostic test modes shown following. Diagnostic test mode
Function
Work support
This mode enables a technician to adjust some devices faster and more accurately by following the indications on CONSULT-III.
Self-diagnostic results
Self-diagnostic results can be read and erased quickly.
Data monitor
Input/Output data in the ABS actuator and electric unit (control unit) can be read.
Active test
Diagnostic test mode is which CONSULT-III drives some actuators apart from the ABS actuator and electric unit (control unit) and also shifts some parameters in a specified range.
ECU part number
ABS actuator and electric unit (control unit) part number can be read.
SELF-DIAG RESULTS MODE Operation Procedure Before performing the self-diagnosis, start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute. How to Erase Self-diagnosis Results After erasing DTC memory, start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute as the final inspection, and make sure that the ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp turn OFF. CAUTION: If memory cannot be erased, perform applicable diagnosis. NOTE: • When the wheel sensor malfunctions, after inspecting the wheel sensor system, the ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp will not turn OFF even when the system is normal unless the vehicle is driving at approximately 30 km/h (19 MPH) or more for approximately 1 minute. • Brake warning lamp will turn ON in case of parking brake operation (when switch is ON) or of brake fluid level switch operation (when brake fluid is insufficient). • VDC OFF switch should not stay “ON” position. Display Item List Refer to BRC-88, "DTC No. Index".
DATA MONITOR MODE Display Item List ×: Applicable
: Optional item
SELECT MONITOR ITEM Monitor item (Unit)
ECU INPUT SIGNALS
MAIN SIGNLAS
FR LH SENSOR [km/h (MPH)]
×
×
FR RH SENSOR [km/h (MPH)]
×
×
RR LH SENSOR [km/h (MPH)]
×
×
RR RH SENSOR [km/h (MPH)]
×
×
STOP LAMP SW (On/Off)
×
×
Revision: 2007 June
Remarks
Wheel speed
Stop lamp switch signal status
BRC-26
G37 Coupe
DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)] [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS > SELECT MONITOR ITEM Remarks
A
×
Battery voltage supplied to the ABS actuator and electric unit (control unit)
B
×
×
A/T selector lever position
OFF SW (On/Off)
×
×
VDC OFF switch
YAW RATE SEN (d/s)
×
×
Yaw rate detected by yaw rate/side G sensor
ACCEL POS SIG (%)
×
Throttle actuator opening/closing is displayed (Linked with accelerator pedal)
×
Transverse G detected by yaw rate/side G sensor
STR ANGLE SIG (°)
×
Steering angle detected by steering angle sensor
PRESS SENSOR (bar)
×
Brake fluid pressure detected by pressure sensor
ENGINE RPM [tr/min (rpm)]
×
Engine speed
FLUID LEV SW (On/Off)
×
Brake fluid level switch signal status
PARK BRAKE SW (On/Off)
×
Parking brake switch signal status
Monitor item (Unit)
ECU INPUT SIGNALS
MAIN SIGNLAS
BATTERY VOLT (V)
×
SLCT LVR POSI
SIDE G-SENSOR (m/s2)
D
E
BRC
G
H
FR RH IN SOL (On/Off)
×
FR RH OUT SOL (On/Off)
×
FR LH IN SOL (On/Off)
×
FR LH OUT SOL (On/Off)
×
RR RH IN SOL (On/Off)
×
RR RH OUT SOL (On/Off)
×
RR LH IN SOL (On/Off)
×
RR LH OUT SOL (On/Off)
×
MOTOR RELAY (On/Off)
×
Motor and motor relay operation
ACTUATOR RLY (On/Off)
×
Actuator relay operation
ABS WARN LAMP (On/Off)
×
ABS warning lamp
OFF LAMP (On/Off)
×
VDC OFF indicator lamp
SLIP LAMP (On/Off)
×
SLIP indicator lamp
I
J
K
Operation status of each solenoid valve
L
M
BST OPER SIG
Not applied but displayed.
EBD SIGNAL (On/Off)
EBD operation
Revision: 2007 June
C
BRC-27
N
O
P
G37 Coupe
DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)] [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS > SELECT MONITOR ITEM Monitor item (Unit)
ECU INPUT SIGNALS
Remarks
MAIN SIGNLAS
ABS SIGNAL (On/Off)
ABS operation
TCS SIGNAL (On/Off)
TCS operation
VDC SIGNAL (On/Off)
VDC operation
EBD FAIL SIG (On/Off)
EBD fail-safe signal
ABS FAIL SIG (On/Off)
ABS fail-safe signal
TCS FAIL SIG (On/Off)
TCS fail-safe signal
VDC FAIL SIG (On/Off)
VDC fail-safe signal
CRANKING SIG (On/Off)
Crank operation
USV [FR-RL] (On/Off) USV [FL-RR] (On/Off) HSV [FR-RL] (On/Off)
VDC switch-over valve
HSV [FL-RR] (On/Off) V/R OUTPUT (On/Off)
Solenoid valve relay activated
M/R OUTPUT (On/Off)
Actuator motor and motor relay activated
ACTIVE TEST MODE CAUTION: • Do not perform active test while driving vehicle. • Make sure to completely bleed air from brake system. • The active test cannot be performed with the ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp are on. • ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp are on during active test. NOTE: • When active test is performed while depressing the pedal, the pedal depression amount will change. This is normal. (Only solenoid valve and ABS motor.) • “TEST IS STOPPED” is displayed 10 seconds after operation start. • After “TEST IS STOPPED” is displayed, to perform test again. Test Item ABS SOLENOID VALVE
• Touch “Up”, “Keep” and “Down”. Then use screen monitor to check that solenoid valve operates as shown in the table below.
Revision: 2007 June
BRC-28
G37 Coupe
DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)] [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS > Display item (Note)
Test item
FR RH SOL
FR LH SOL
RR RH SOL
RR LH SOL
Display
A
Up
Keep
Down
FR RH IN SOL
Off
On
On
FR RH OUT SOL
Off
Off
On*
USV [FR-RL]
Off
Off
Off
HSV [FR-RL]
Off
Off
Off
FR LH IN SOL
Off
On
On
FR LH OUT SOL
Off
Off
On*
USV [FL-RR]
Off
Off
Off
HSV [FL-RR]
Off
Off
Off
RR RH IN SOL
Off
On
On
RR RH OUT SOL
Off
Off
On*
USV [FL-RR]
Off
Off
Off
HSV [FL-RR]
Off
Off
Off
RR LH IN SOL
Off
On
On
RR LH OUT SOL
Off
Off
On*
USV [FR-RL]
Off
Off
Off
HSV [FR-RL]
Off
Off
Off
B
C
D
E
BRC
G
H
*: On for 1 to 2 seconds after the touch, and then Off. NOTE: A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking.
I
ABS SOLENOID VALVE (ACT)
• Touch “Up”, “ACT UP” and “ACT KEEP”. Then use screen monitor to check that solenoid valve operates as shown in the table below. Test item
FR RH ABS SOLENOID (ACT)
FR LH ABS SOLENOID (ACT)
RR RH ABS SOLENOID (ACT)
RR LH ABS SOLENOID (ACT)
Display item (Note)
Display Up
ACT UP
ACT KEEP
FR RH IN SOL
Off
Off
Off
FR RH OUT SOL
Off
Off
Off
USV [FR-RL]
Off
On
On
HSV [FR-RL]
Off
On*
Off
FR LH IN SOL
Off
Off
Off
FR LH OUT SOL
Off
Off
Off
USV [FL-RR]
Off
On
On
HSV [FL-RR]
Off
On*
Off
RR RH IN SOL
Off
Off
Off
RR RH OUT SOL
Off
Off
Off
USV [FL-RR]
Off
On
On
HSV [FL-RR]
Off
On*
Off
RR LH IN SOL
Off
Off
Off
RR LH OUT SOL
Off
Off
Off
USV [FR-RL]
Off
On
On
HSV [FR-RL]
Off
On*
Off
*: On for 1 to 2 seconds after the touch, and then Off. NOTE:
Revision: 2007 June
J
BRC-29
G37 Coupe
K
L
M
N
O
P
DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)] [VDC/TCS/ABS]
< FUNCTION DIAGNOSIS >
A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking.
ABS MOTOR
• Touch “On” and “Off” on screen. Make sure motor relay and actuator relay operates as shown in table below.
Test item
ABS MOTOR
Display item
Display On
Off
MOTOR RELAY
On
Off
ACTUATOR RLY (Note)
On
On
NOTE: A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking.
Revision: 2007 June
BRC-30
G37 Coupe
C1101, C1102, C1103, C1104 WHEEL SENSOR-1 [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
COMPONENT DIAGNOSIS
A
C1101, C1102, C1103, C1104 WHEEL SENSOR-1 Description
INFOID:0000000001635040
When the sensor rotor rotates, the magnetic field changes. It converts the magnetic field changes to current signals (rectangular wave) and transmits them to the ABS actuator and electric unit (control unit).
DTC Logic
C
INFOID:0000000001635041
DTC DETECTION LOGIC DTC
B
D
Display item
Malfunction detected condition
C1101
RR RH SENSOR-1
Circuit of rear RH wheel sensor is open. Or when the sensor power voltage is outside the standard.
C1102
RR LH SENSOR-1
Circuit of rear LH wheel sensor is open. Or when the sensor power voltage is outside the standard.
C1103
FR RH SENSOR-1
Circuit of front RH wheel sensor is open. Or when the sensor power voltage is outside the standard.
C1104
FR LH SENSOR-1
Circuit of front LH wheel sensor is open. Or when the sensor power voltage is outside the standard.
Possible cause
E • Harness or connector • Wheel sensor • ABS actuator and electric unit (control unit)
BRC
G
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
H
Check the self-diagnosis results. I Self-diagnosis results RR RH SENSOR-1
J
RR LH SENSOR-1 FR RH SENSOR-1 FR LH SENSOR-1
K
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-31, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
L INFOID:0000000001665601
CAUTION: Do not check between wheel sensor terminals.
M
1.CHECK TIRES N
Check air pressure, wear and size. Are air pressure, wear and size within standard? YES >> GO TO 2. NO >> Adjust air pressure, or replace tire.
O
2.CHECK SENSOR AND SENSOR ROTOR • Check sensor rotor for damage. • Check wheel sensor for damage, disconnection or looseness. Are the sensor and sensor rotor normal? YES >> GO TO 3. NO >> Repair wheel sensor mount or replace sensor rotor. Then perform the self-diagnosis.
P
3.CHECK CONNECTOR 1.
Turn ignition switch OFF.
Revision: 2007 June
BRC-31
G37 Coupe
C1101, C1102, C1103, C1104 WHEEL SENSOR-1 [VDC/TCS/ABS] < COMPONENT DIAGNOSIS > 2. Disconnect ABS actuator and electric unit (control unit) connector. 3. Disconnect malfunctioning wheel sensor connector. 4. Check terminal to see if it is deformed, disconnected, loose, etc., Repair or replace it if any malfunction condition is found. 5. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 4. NO >> Poor connection of connector terminal. Repair or replace connector.
4.CHECK WHEEL SENSOR HARNESS 1. 2. 3. 4.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Disconnect malfunctioning wheel sensor connector. Check continuity between terminals. (Also check continuity when steering wheel is turned right and left and when sensor harness inside the wheel house is moved.) Measurement terminal for power supply circuit
ABS actuator and electric unit (control unit) Connector
E41
Wheel sensor
Terminal
Connector
Terminal
9
E27 (Front RH)
26
E60 (Front LH)
7
B33 (Rear RH)
6
B34 (Rear LH)
1
Continuity
Existed
Measurement terminal for signal circuit
ABS actuator and electric unit (control unit) Connector
E41
Wheel sensor
Terminal
Connector
10
E27 (Front RH)
5
E60 (Front LH)
29
B33 (Rear RH)
27
B34 (Rear LH)
Terminal
2
Continuity
Existed
Measurement terminal for ground circuit
ABS actuator and electric unit (control unit) Connector
Terminal
Connector
Terminal
E41
1, 4
Continuity
9, 10 E41
26, 5 7, 29
Not existed
6, 27
Is the inspection result normal? YES >> GO TO 5. NO >> Repair or replace malfunctioning components.
5.CHECK WHEEL SENSOR POWER SUPPLY CIRCUIT 1. 2. 3.
Disconnect malfunctioning wheel sensor connector. Turn ignition switch ON. Check voltage between wheel sensor harness connector power supply terminal and ground.
Revision: 2007 June
BRC-32
G37 Coupe
C1101, C1102, C1103, C1104 WHEEL SENSOR-1 [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
A
Wheel sensor Connector
—
Terminal
Voltage
E27 (Front RH) E60 (Front LH) B33 (Rear RH)
B 1
Ground
8 V or more
C
B34 (Rear LH)
Is the inspection result normal? YES >> Replace applicable wheel sensor. NO >> Replace ABS actuator and electric unit (control unit).
Component Inspection
D INFOID:0000000001665602
E
1.CHECK DATA MONITOR
On “DATA MONITOR”, select “FR LH SENSOR”, “FR RH SENSOR”, “RR LH SENSOR”, and “RR RH SENSOR”, and check the vehicle speed. BRC Wheel sensor
Vehicle speed (DATA MONITOR)
G
FR LH SENSOR FR RH SENSOR RR LH SENSOR
Nearly matches the speedometer display (±10% or less)
H
RR RH SENSOR
Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-31, "Diagnosis Procedure".
Special Repair Requirement
I INFOID:0000000001665603
J
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the “ST ANG SEN ADJUSTMENT” in “WORK SUPPORT”, when replacing the ABS actuator and electric unit (control unit). >> END
K
L
M
N
O
P
Revision: 2007 June
BRC-33
G37 Coupe
C1105, C1106, C1107, C1108 WHEEL SENSOR-2 [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1105, C1106, C1107, C1108 WHEEL SENSOR-2 Description
INFOID:0000000001665608
When the sensor rotor rotates, the magnetic field changes. It converts the magnetic field changes to current signals (rectangular wave) and transmits them to the ABS actuator and electric unit (control unit).
DTC Logic
INFOID:0000000001635046
DTC DETECTION LOGIC DTC
Display item
Malfunction detected condition
RR RH SENSOR-2
When the circuit in the rear RH wheel sensor is short-circuited. Or when the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recognized by the control unit.
C1106
RR LH SENSOR-2
When the circuit in the rear LH wheel sensor is short-circuited. Or when the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recognized by the control unit.
C1107
FR RH SENSOR-2
When the circuit in the front RH wheel sensor is short-circuited. Or when the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recognized by the control unit.
FR LH SENSOR-2
When the circuit in the front LH wheel sensor is short-circuited. Or when the distance between the wheel sensor and sensor rotor is too large and the sensor pulse cannot be recognized by the control unit.
C1105
C1108
Possible cause
• Harness or connector • Wheel sensor • ABS actuator and electric unit (control unit)
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results. Self-diagnosis results RR RH SENSOR-2 RR LH SENSOR-2 FR RH SENSOR-2 FR LH SENSOR-2
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-34, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
INFOID:0000000001665605
CAUTION: Do not check between wheel sensor terminals.
1.CHECK TIRES Check air pressure, wear and size. Are air pressure, wear and size within standard? YES >> GO TO 2. NO >> Adjust air pressure, or replace tire.
2.CHECK SENSOR AND SENSOR ROTOR • Check sensor rotor for damage. • Check wheel sensor for damage, disconnection or looseness. Are the sensor and sensor rotor normal? Revision: 2007 June
BRC-34
G37 Coupe
C1105, C1106, C1107, C1108 WHEEL SENSOR-2 [VDC/TCS/ABS] < COMPONENT DIAGNOSIS > YES >> GO TO 3. NO >> Repair wheel sensor mount or replace sensor rotor. Then perform the self-diagnosis.
A
3.CHECK CONNECTOR 1. 2. 3. 4.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Disconnect malfunctioning wheel sensor connector. Check terminal to see if it is deformed, disconnected, loose, etc., Repair or replace it if any malfunction condition is found. 5. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 4. NO >> Poor connection of connector terminal. Repair or replace connector.
B
C
D
4.CHECK WHEEL SENSOR HARNESS 1. 2. 3. 4.
E Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Disconnect malfunctioning wheel sensor connector. Check continuity between terminals. (Also check continuity when steering wheel is turned right and left BRC and when sensor harness inside the wheel house is moved.) G
Measurement terminal for power supply circuit
ABS actuator and electric unit (control unit) Connector
E41
Wheel sensor
Terminal
Connector
Terminal
9
E27 (Front RH)
26
E60 (Front LH)
7
B33 (Rear RH)
6
B34 (Rear LH)
Continuity
H 1
Existed
I
Measurement terminal for signal circuit
J
ABS actuator and electric unit (control unit) Connector
E41
Wheel sensor
Terminal
Connector
10
E27 (Front RH)
5
E60 (Front LH)
29
B33 (Rear RH)
27
B34 (Rear LH)
Terminal
Continuity
K 2
Existed
L
Measurement terminal for ground circuit
M
ABS actuator and electric unit (control unit) Connector
Terminal
Connector
Terminal
Continuity
9, 10 E41
26, 5 7, 29
N E41
1, 4
Not existed
O
6, 27
Is the inspection result normal? YES >> GO TO 5. NO >> Repair or replace malfunctioning components.
P
5.CHECK WHEEL SENSOR POWER SUPPLY CIRCUIT 1. 2. 3.
Disconnect malfunctioning wheel sensor connector. Turn ignition switch ON. Check voltage between wheel sensor harness connector power supply terminal and ground.
Revision: 2007 June
BRC-35
G37 Coupe
C1105, C1106, C1107, C1108 WHEEL SENSOR-2 [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS > Wheel sensor Connector
Terminal
—
Voltage
Ground
8 V or more
E27 (Front RH) E60 (Front LH) B33 (Rear RH)
1
B34 (Rear LH)
Is the inspection result normal? YES >> Replace applicable wheel sensor. NO >> Replace ABS actuator and electric unit (control unit).
Component Inspection
INFOID:0000000001665606
1.CHECK DATA MONITOR On “DATA MONITOR”, select “FR LH SENSOR”, “FR RH SENSOR”, “RR LH SENSOR”, and “RR RH SENSOR”, and check the vehicle speed. Wheel sensor
Vehicle speed (DATA MONITOR)
FR LH SENSOR FR RH SENSOR RR LH SENSOR
Nearly matches the speedometer display (±10% or less)
RR RH SENSOR
Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-34, "Diagnosis Procedure".
Special Repair Requirement
INFOID:0000000001665607
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the “ST ANG SEN ADJUSTMENT” in “WORK SUPPORT”, when replacing the ABS actuator and electric unit (control unit). >> END
Revision: 2007 June
BRC-36
G37 Coupe
C1109 POWER AND GROUND SYSTEM [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1109 POWER AND GROUND SYSTEM
A
Description
INFOID:0000000001635050
Supplies electric power to the ABS actuator and electric unit (control unit).
B
DTC Logic
INFOID:0000000001635051
C
DTC DETECTION LOGIC DTC
Display item
C1109
Malfunction detected condition
BATTERY VOLTAGE [ABNORMAL]
Possible cause
When the ABS actuator and electric unit (control unit) power supply voltage is lower than normal.
• Harness or connector • ABS actuator and electric unit (control unit)
D
E
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS BRC
Check the self-diagnosis results. Self-diagnosis results
G
BATTERY VOLTAGE [ABNORMAL]
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-37, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
H INFOID:0000000001635052
I
1.CHECK CONNECTOR 1. 2. 3.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 4. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 2. NO >> Poor connection of connector terminal. Repair or replace connector.
2.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUIT AND GROUND CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ABS actuator and electric unit (control unit) connector. 3. Turn ignition switch ON or OFF and check voltage between ABS actuator and electric unit (control unit) harness connector terminal and ground. ABS actuator and electric unit (control unit) Connector E41
4. 5.
Terminal 28
—
Condition
K
L
M
N
Voltage
O Ground
Ignition switch: ON
Battery voltage
Ignition switch: OFF
Approx. 0 V
Turn ignition switch OFF. Check continuity between ABS actuator and electric unit (control unit) harness connector terminals and ground.
Revision: 2007 June
J
BRC-37
G37 Coupe
P
C1109 POWER AND GROUND SYSTEM [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS > ABS actuator and electric unit (control unit) Connector
Terminal
E41
1, 4
—
Continuity
Ground
Existed
Is the inspection result normal? YES >> Check battery for terminal looseness, low voltage, etc. If any malfunction is found, repair malfunctioning parts. NO >> Repair or replace malfunctioning components.
Special Repair Requirement
INFOID:0000000001635053
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the “ST ANG SEN ADJUSTMENT” in “WORK SUPPORT”, when replacing the ABS actuator and electric unit (control unit). >> END
Revision: 2007 June
BRC-38
G37 Coupe
C1110, C1153, C1170 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1110, C1153, C1170 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) DTC Logic
A
INFOID:0000000001635054
B
DTC DETECTION LOGIC DTC
Display item
Malfunction detected condition
C1110
CONTROLLER FAILURE
When there is an internal malfunction in the ABS actuator and electric unit (control unit).
C1153
EMERGENCY BRAKE
When ABS actuator and electric unit (control unit) is malfunctioning. (Pressure increase is too much or too little)
C1170
VARIANT CODING
In a case where VARIANT CODING is different.
Possible cause
• ABS actuator and electric unit (control unit)
C
D
E
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
BRC
Check the self-diagnosis results. Self-diagnosis results
G
CONTROLLER FAILURE EMERGENCY BRAKE
H
VARIANT CODING
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-39, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
I INFOID:0000000001635055
J
1.REPLACE ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) CAUTION: Replace ABS actuator and electric unit (control unit) when self-diagnostic result shows items other than those applicable.
L
>> Replace ABS actuator and electric unit (control unit).
Special Repair Requirement
K
INFOID:0000000001635056
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
M
Always perform the “ST ANG SEN ADJUSTMENT” in “WORK SUPPORT”, when replacing the ABS actuator and electric unit (control unit).
N
>> END O
P
Revision: 2007 June
BRC-39
G37 Coupe
C1111 ABS MOTOR, MOTOR RELAY SYSTEM [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1111 ABS MOTOR, MOTOR RELAY SYSTEM Description
INFOID:0000000001635057
PUMP The pump returns the brake fluid stored in the reservoir to the master cylinder by reducing the pressure.
MOTOR The motor drives the pump according to the signals transmitted by the ABS actuator and electric unit (control unit).
DTC Logic
INFOID:0000000001635058
DTC DETECTION LOGIC DTC
C1111
Display item
Malfunction detected condition During the actuator motor operating with ON, when the actuator motor turns OFF, or when the control line for actuator motor relay is open.
PUMP MOTOR
During the actuator motor operating with OFF, when the actuator motor turns ON, or when the control line for relay is shorted to ground.
Possible cause
• Harness or connector • ABS actuator and electric unit (control unit)
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results. Self-diagnosis results PUMP MOTOR
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-40, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
INFOID:0000000001635059
1.CHECK CONNECTOR 1. 2. 3.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Check terminal for deformation, disconnect, looseness, and so on. If any malfunction is found, repair or replace terminal. 4. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 2. NO >> Poor connection of connector terminal. Repair or replace connector.
2.CHECK ABS MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT 1. 2. 3.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Check voltage between the ABS actuator and electric unit (control unit) harness connector terminal and ground. ABS actuator and electric unit (control unit) Connector
Terminal
E41
2
—
Voltage
Ground
Battery voltage
Is the inspection result normal? Revision: 2007 June
BRC-40
G37 Coupe
C1111 ABS MOTOR, MOTOR RELAY SYSTEM [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS > YES >> GO TO 3. NO >> Repair or replace malfunctioning components.
A
3.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT Check continuity between ABS actuator and electric unit (control unit) harness connector terminals and ground. ABS actuator and electric unit (control unit) Connector
Terminal
E41
1, 4
—
Continuity
Ground
Existed
C
D
Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace malfunctioning components.
E
Component Inspection
INFOID:0000000001635060
1.CHECK ACTIVE TEST 1. 2.
BRC
On “ACTIVE TEST”, select “ABS MOTOR”. Touch “On” and “Off” on screen. Make sure motor relay and actuator relay operates as shown in table below.
Test item
ABS MOTOR
Display item
B
G
Display On
Off
MOTOR RELAY
On
Off
ACTUATOR RLY (Note)
On
On
H
I
NOTE: A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking.
J
Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-40, "Diagnosis Procedure".
K
Special Repair Requirement
INFOID:0000000001635061
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
L
Always perform the “ST ANG SEN ADJUSTMENT” in “WORK SUPPORT”, when replacing the ABS actuator and electric unit (control unit). M
>> END N
O
P
Revision: 2007 June
BRC-41
G37 Coupe
C1114 ACTUATOR RELAY SYSTEM [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1114 ACTUATOR RELAY SYSTEM Description
INFOID:0000000001635062
Activates or deactivates each solenoid valve according to the signals transmitted by the ABS actuator and electric unit (control unit).
DTC Logic
INFOID:0000000001635063
DTC DETECTION LOGIC DTC
C1114
Display item
Malfunction detected condition During the actuator relay operating with OFF, when the actuator relay turns ON, or when the control line for the relay is shorted to the ground.
MAIN RELAY
During the actuator relay operating with ON, when the actuator relay turns ON, or when the control line for the relay is open.
Possible cause
• Harness or connector • ABS actuator and electric unit (control unit)
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results. Self-diagnosis results MAIN RELAY
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-42, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
INFOID:0000000001635064
1.CHECK CONNECTOR 1. 2. 3.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 4. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 2. NO >> Poor connection of connector terminal. Repair or replace connector.
2.CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACTUATOR RELAY POWER SUPPLY CIRCUIT 1. 2. 3.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Check voltage between ABS actuator and electric unit (control unit) harness connector terminal and ground. ABS actuator and electric unit (control unit) Connector
Terminal
E41
3
—
Voltage
Ground
Battery voltage
Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace malfunctioning components.
3.CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACUATOR RELAY GROUND CIRCUIT Revision: 2007 June
BRC-42
G37 Coupe
C1114 ACTUATOR RELAY SYSTEM [VDC/TCS/ABS] < COMPONENT DIAGNOSIS > Check continuity between ABS actuator and electric unit (control unit) harness connector terminals and ground. ABS actuator and electric unit (control unit) Connector
Terminal
E41
1, 4
—
Continuity
Ground
Existed
B
Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace malfunctioning components.
Component Inspection
A
C
INFOID:0000000001664572
D
1.CHECK ACTIVE TEST 1. 2.
On “ACTIVE TEST”, select “ABS MOTOR”. Touch “On” and “Off” on screen. Make sure motor relay and actuator relay operates as shown in table below.
E
BRC Test item
ABS MOTOR
Display item
Display On
Off
MOTOR RELAY
On
Off
ACTUATOR RLY (Note)
On
On
G
NOTE:
H
A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking.
Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-40, "Diagnosis Procedure".
Special Repair Requirement
I
INFOID:0000000001635066
J
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description".
K
L
>> END M
N
O
P
Revision: 2007 June
BRC-43
G37 Coupe
C1115 WHEEL SENSOR [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1115 WHEEL SENSOR Description
INFOID:0000000001664566
When the sensor rotor rotates, the magnetic field changes. It converts the magnetic field changes to current signals (rectangular wave) and transmits them to the ABS actuator and electric unit (control unit).
DTC Logic
INFOID:0000000001635068
DTC DETECTION LOGIC DTC
C1115
Display item ABS SENSOR [ABNORMAL SIGNAL]
Malfunction detected condition
When wheel sensor input signal is malfunctioning.
Possible cause • Harness or connector • Wheel sensor • ABS actuator and electric unit (control unit)
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results. Self-diagnosis results ABS SENSOR [ABNORMAL SIGNAL]
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-44, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
INFOID:0000000001665620
CAUTION: Do not check between wheel sensor terminals.
1.CHECK TIRES Check air pressure, wear and size. Are air pressure, wear and size within standard? YES >> GO TO 2. NO >> Adjust air pressure, or replace tire.
2.CHECK SENSOR AND SENSOR ROTOR • Check sensor rotor for damage. • Check wheel sensor for damage, disconnection or looseness. Are the sensor and sensor rotor normal? YES >> GO TO 3. NO >> Repair wheel sensor mount or replace sensor rotor. Then perform the self-diagnosis.
3.CHECK CONNECTOR 1. 2. 3. 4.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Disconnect malfunctioning wheel sensor connector. Check terminal to see if it is deformed, disconnected, loose, etc., Repair or replace it if any malfunction condition is found. 5. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 4. NO >> Poor connection of connector terminal. Repair or replace connector.
4.CHECK WHEEL SENSOR HARNESS Revision: 2007 June
BRC-44
G37 Coupe
C1115 WHEEL SENSOR [VDC/TCS/ABS] < COMPONENT DIAGNOSIS > 1. Turn ignition switch OFF. 2. Disconnect ABS actuator and electric unit (control unit) connector. 3. Disconnect malfunctioning wheel sensor connector. 4. Check continuity between terminals. (Also check continuity when steering wheel is turned right and left and when sensor harness inside the wheel house is moved.)
A
B
Measurement terminal for power supply circuit
ABS actuator and electric unit (control unit) Connector
E41
Wheel sensor
Terminal
Connector
Terminal
9
E27 (Front RH)
26
E60 (Front LH)
7
B33 (Rear RH)
6
B34 (Rear LH)
1
Continuity
Existed
C
D
E Measurement terminal for signal circuit
ABS actuator and electric unit (control unit) Connector
E41
Wheel sensor
Terminal
Connector
10
E27 (Front RH)
5
E60 (Front LH)
29
B33 (Rear RH)
27
B34 (Rear LH)
Terminal
2
Continuity
BRC
Existed
G
H Measurement terminal for ground circuit
ABS actuator and electric unit (control unit) Connector
Terminal
Connector
Terminal
E41
1, 4
Continuity
I
Not existed
J
9, 10 26, 5
E41
7, 29 6, 27
Is the inspection result normal? YES >> GO TO 5. NO >> Repair or replace malfunctioning components.
K
5.CHECK WHEEL SENSOR POWER SUPPLY CIRCUIT
L
1. 2. 3.
M
Disconnect malfunctioning wheel sensor connector. Turn ignition switch ON. Check voltage between wheel sensor harness connector power supply terminal and ground. Wheel sensor Connector
Terminal
—
Voltage
Ground
8 V or more
N
E27 (Front RH) E60 (Front LH) B33 (Rear RH)
O 1
B34 (Rear LH)
P
Is the inspection result normal? YES >> Replace applicable wheel sensor. NO >> Replace ABS actuator and electric unit (control unit).
Component Inspection
INFOID:0000000001665621
1.CHECK DATA MONITOR Revision: 2007 June
BRC-45
G37 Coupe
C1115 WHEEL SENSOR [VDC/TCS/ABS] < COMPONENT DIAGNOSIS > On “DATA MONITOR”, select “FR LH SENSOR”, “FR RH SENSOR”, “RR LH SENSOR”, and “RR RH SENSOR”, and check the vehicle speed. Wheel sensor
Vehicle speed (DATA MONITOR)
FR LH SENSOR FR RH SENSOR RR LH SENSOR
Nearly matches the speedometer display (±10% or less)
RR RH SENSOR
Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-44, "Diagnosis Procedure".
Special Repair Requirement
INFOID:0000000001665622
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the “ST ANG SEN ADJUSTMENT” in “WORK SUPPORT”, when replacing the ABS actuator and electric unit (control unit). >> END
Revision: 2007 June
BRC-46
G37 Coupe
C1116 STOP LAMP SWITCH [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1116 STOP LAMP SWITCH
A
Description
INFOID:0000000001635072
The stop lamp switch transmits the stop lamp switch signal (ON/OFF) to the ABS actuator and electric unit (control unit).
DTC Logic
B
INFOID:0000000001635073
C
DTC DETECTION LOGIC DTC
C1116
Display item
Malfunction detected condition
STOP LAMP SW
When stop lamp switch circuit is open.
Possible cause • Harness or connector • Stop lamp switch • ABS actuator and electric unit (control unit)
D
E
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
BRC
Check the self-diagnosis results. G Self-diagnosis results STOP LAMP SW
H
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-47, "Diagnosis Procedure". NO >> INSPECTION END
I
Diagnosis Procedure
INFOID:0000000001635074
1.CHECK CONNECTOR
J
1. 2. 3. 4.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Disconnect stop lamp switch connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 5. Reconnect connectors securely. 6. Start engine. 7. Repeat pumping brake pedal carefully several times, and perform self-diagnosis. Is the inspection result normal? YES >> GO TO 2. NO >> Poor connection of connector terminal. Repair or replace connector.
2.CHECK STOP LAMP SWITCH 1. 2. 3.
Connector
E110
Condition
Terminal 1 – 2 (Without ICC models) 3 − 4 (With ICC models)
Release stop lamp switch (When brake pedal is depressed.) Push stop lamp switch (When brake pedal is released.)
BRC-47
M
O Continuity
P Existed Not existed
Is the inspection result normal? YES >> GO TO 3. NO >> Replace stop lamp switch. Revision: 2007 June
L
N
Turn ignition switch OFF. Disconnect stop lamp switch connector. Check continuity between stop lamp switch connector terminals. Stop lamp switch
K
G37 Coupe
C1116 STOP LAMP SWITCH [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
3.CHECK STOP LAMP SWITCH CIRCUIT 1. 2. 3.
Disconnect ABS actuator and electric unit (control unit) connector. Connect stop lamp switch connector. Check voltage between ABS actuator and electric unit (control unit) harness connector terminal and ground. ABS actuator and electric unit (control unit) Connector
Terminal
E41
30
Condition Brake pedal is depressed Brake pedal is released
Voltage Battery voltage Approx. 0 V
Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace malfunctioning components.
Component Inspection
INFOID:0000000001635075
1.CHECK STOP LAMP SWITCH 1. 2. 3.
Turn ignition switch OFF. Disconnect stop lamp switch connector. Check continuity between stop lamp switch connector terminals. Stop lamp switch
Condition
Connector
Terminal
E110
1 – 2 (Without ICC models) 3 − 4 (With ICC models)
Release stop lamp switch (When brake pedal is depressed.) Push stop lamp switch (When brake pedal is released.)
Continuity Existed Not existed
Is the inspection result normal? YES >> INSPECTION END NO >> Replace stop lamp switch.
Special Repair Requirement
INFOID:0000000001635076
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description". >> END
Revision: 2007 June
BRC-48
G37 Coupe
C1120, C1122, C1124, C1126 IN ABS SOL [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1120, C1122, C1124, C1126 IN ABS SOL
A
Description
INFOID:0000000001635077
The solenoid valve increases, holds or decreases the fluid pressure of each brake caliper according to the signals transmitted by the ABS actuator and electric unit (control unit).
DTC Logic
B
INFOID:0000000001635078
C
DTC DETECTION LOGIC DTC
Display item
Malfunction detected condition
C1120
FR LH IN ABS SOL
When the control unit detects a malfunction in the front LH inlet solenoid circuit.
C1122
FR RH IN ABS SOL
When the control unit detects a malfunction in the front RH inlet solenoid circuit.
C1124
RR LH IN ABS SOL
When the control unit detects a malfunction in the rear LH inlet solenoid circuit.
C1126
RR RH IN ABS SOL
When the control unit detects a malfunction in the rear RH inlet solenoid circuit.
Possible cause
D
E • ABS actuator and electric unit (control unit)
BRC
G
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results.
H
Self-diagnosis results
I
FR LH IN ABS SOL FR RH IN ABS SOL RR LH IN ABS SOL
J
RR RH IN ABS SOL
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-49, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
K
INFOID:0000000001635079
L
1.CHECK CONNECTOR 1. 2. 3.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 4. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 2. NO >> Poor connection of connector terminal. Repair or replace connector.
M
N
O
2.CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACTUATOR RELAY POWER SUPPLY CIRCUIT 1. 2. 3.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Check voltage between ABS actuator and electric unit (control unit) harness connector terminal and ground.
Revision: 2007 June
BRC-49
G37 Coupe
P
C1120, C1122, C1124, C1126 IN ABS SOL [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS > ABS actuator and electric unit (control unit) Connector
Terminal
E41
3
—
Voltage
Ground
Battery voltage
Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace malfunctioning components.
3.CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACUATOR RELAY GROUND CIRCUIT Check continuity between ABS actuator and electric unit (control unit) harness connector terminals and ground. ABS actuator and electric unit (control unit) Connector
Terminal
E41
1, 4
—
Continuity
Ground
Existed
Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace malfunctioning components.
Component Inspection
INFOID:0000000001635080
1.CHECK ACTIVE TEST 1. 2.
Select each test menu item on ”ACTIVE TEST“. On the display, touch “Up”, “Keep”, and “Down”, and check that the system operates as shown in the table below. Test item
FR RH SOL
FR LH SOL
RR RH SOL
RR LH SOL
Display item (Note)
Display Up
Keep
Down
FR RH IN SOL
Off
On
On
FR RH OUT SOL
Off
Off
On*
USV [FR-RL]
Off
Off
Off
HSV [FR-RL]
Off
Off
Off
FR LH IN SOL
Off
On
On
FR LH OUT SOL
Off
Off
On*
USV [FL-RR]
Off
Off
Off
HSV [FL-RR]
Off
Off
Off
RR RH IN SOL
Off
On
On
RR RH OUT SOL
Off
Off
On*
USV [FL-RR]
Off
Off
Off
HSV [FL-RR]
Off
Off
Off
RR LH IN SOL
Off
On
On
RR LH OUT SOL
Off
Off
On*
USV [FR-RL]
Off
Off
Off
HSV [FR-RL]
Off
Off
Off
*: On for 1 to 2 seconds after the touch, and then Off. NOTE: A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking.
Is the inspection result normal? YES >> INSPECTION END Revision: 2007 June
BRC-50
G37 Coupe
C1120, C1122, C1124, C1126 IN ABS SOL < COMPONENT DIAGNOSIS > NO >> Go to diagnosis procedure. Refer to BRC-49, "Diagnosis Procedure".
[VDC/TCS/ABS] A
Special Repair Requirement
INFOID:0000000001635081
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
B
Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description".
C
>> END D
E
BRC
G
H
I
J
K
L
M
N
O
P
Revision: 2007 June
BRC-51
G37 Coupe
C1121, C1123, C1125, C1127 OUT ABS SOL [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1121, C1123, C1125, C1127 OUT ABS SOL Description
INFOID:0000000001664568
The solenoid valve increases, holds or decreases the fluid pressure of each brake caliper according to the signals transmitted by the ABS actuator and electric unit (control unit).
DTC Logic
INFOID:0000000001635083
DTC DETECTION LOGIC DTC
Display item
Malfunction detected condition
C1121
FR LH OUT ABS SOL
When the control unit detects a malfunction in the front LH outlet solenoid circuit.
C1123
FR RH OUT ABS SOL
When the control unit detects a malfunction in the front RH outlet solenoid circuit.
C1125
RR LH OUT ABS SOL
When the control unit detects a malfunction in the rear LH outlet solenoid circuit.
C1127
RR RH OUT ABS SOL
When the control unit detects a malfunction in the rear RH outlet solenoid circuit.
Possible cause
• ABS actuator and electric unit (control unit)
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results. Self-diagnosis results FR LH OUT ABS SOL FR RH OUT ABS SOL RR LH OUT ABS SOL RR RH OUT ABS SOL
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-52, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
INFOID:0000000001664569
1.CHECK CONNECTOR 1. 2. 3.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 4. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 2. NO >> Poor connection of connector terminal. Repair or replace connector.
2.CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACTUATOR RELAY POWER SUPPLY CIRCUIT 1. 2. 3.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Check voltage between ABS actuator and electric unit (control unit) harness connector terminal and ground.
Revision: 2007 June
BRC-52
G37 Coupe
C1121, C1123, C1125, C1127 OUT ABS SOL [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS > ABS actuator and electric unit (control unit) Connector
Terminal
E41
3
A —
Voltage
Ground
Battery voltage
B
Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace malfunctioning components.
C
3.CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACUATOR RELAY GROUND CIRCUIT Check continuity between ABS actuator and electric unit (control unit) harness connector terminals and ground. ABS actuator and electric unit (control unit) Connector
Terminal
E41
1, 4
—
Continuity
Ground
Existed
E
Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace malfunctioning components.
BRC
Component Inspection
INFOID:0000000001664570
1.CHECK ACTIVE TEST 1. 2.
Select each test menu item on ”ACTIVE TEST“. On the display, touch “Up”, “Keep”, and “Down”, and check that the system operates as shown in the table below. Test item
FR RH SOL
FR LH SOL
RR RH SOL
RR LH SOL
Display item (Note)
G
H
I
Display Up
Keep
Down
FR RH IN SOL
Off
On
On
FR RH OUT SOL
Off
Off
On*
USV [FR-RL]
Off
Off
Off
HSV [FR-RL]
Off
Off
Off
FR LH IN SOL
Off
On
On
FR LH OUT SOL
Off
Off
On*
USV [FL-RR]
Off
Off
Off
HSV [FL-RR]
Off
Off
Off
RR RH IN SOL
Off
On
On
RR RH OUT SOL
Off
Off
On*
USV [FL-RR]
Off
Off
Off
HSV [FL-RR]
Off
Off
Off
RR LH IN SOL
Off
On
On
RR LH OUT SOL
Off
Off
On*
USV [FR-RL]
Off
Off
Off
HSV [FR-RL]
Off
Off
Off
*: On for 1 to 2 seconds after the touch, and then Off. NOTE: A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking.
Is the inspection result normal? YES >> INSPECTION END Revision: 2007 June
D
BRC-53
G37 Coupe
J
K
L
M
N
O
P
C1121, C1123, C1125, C1127 OUT ABS SOL < COMPONENT DIAGNOSIS > NO >> Go to diagnosis procedure. Refer to BRC-52, "Diagnosis Procedure".
Special Repair Requirement
[VDC/TCS/ABS]
INFOID:0000000001664571
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description". >> END
Revision: 2007 June
BRC-54
G37 Coupe
C1130, C1131, C1132 ENGINE SIGNAL [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1130, C1131, C1132 ENGINE SIGNAL
A
Description
INFOID:0000000001635087
ABS actuator and electric unit (control unit) and ECM exchange the engine signal with CAN communication line.
DTC Logic
B
INFOID:0000000001635088
C
DTC DETECTION LOGIC DTC
Display item
C1130
ENGINE SIGNAL 1
C1131
ENGINE SIGNAL 2
C1132
ENGINE SIGNAL 3
Possible cause
D
• Harness or connector • ABS actuator and electric unit (control unit) • ECM • CAN communication line
E
Malfunction detected condition
Major engine components are malfunctioning.
DTC CONFIRMATION PROCEDURE
BRC
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results.
G
Self-diagnosis results ENGINE SIGNAL 1
H
ENGINE SIGNAL 2 ENGINE SIGNAL 3
I
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-55, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
J INFOID:0000000001635089
1.CHECK ENGINE SYSTEM
K
1. Perform ECM self-diagnosis. Repair or replace items indicated, then perform ECM self-diagnosis again. 2. Perform ABS actuator and electric unit (control unit) self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> Repair or replace the affected part. NO >> INSPECTION END
L
M
Special Repair Requirement
INFOID:0000000001635090
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description".
N
O
>> END P
Revision: 2007 June
BRC-55
G37 Coupe
C1138 4WAS SYSTEM [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1138 4WAS SYSTEM Description
INFOID:0000000001635091
The ABS actuator and electric unit (control unit) and the 4WAS control unit exchange signals via the CAN communication line.
DTC Logic
INFOID:0000000001635092
DTC DETECTION LOGIC DTC
C1138
Display item
4WAS CIRCUIT
Malfunction detected condition
Abnormal condition in major 4WAS parts.
Possible cause • ABS actuator and electric unit (control unit) • 4WAS system • CAN communication line
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results. Self-diagnosis results 4WAS CIRCUIT
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-56, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
INFOID:0000000001635093
1.CHECK 4WAS SYSTEM 1.
Perform 4WAS front control unit self-diagnosis and 4WAS main control unit self-diagnosis. Repair or replace items indicated, then perform 4WAS front control unit self-diagnosis and 4WAS main control unit self-diagnosis again. 2. Perform ABS actuator and electric unit (control unit) self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> Repair or replace the affected part. NO >> INSPECTION END
Special Repair Requirement
INFOID:0000000001635094
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description". >> END
Revision: 2007 June
BRC-56
G37 Coupe
C1142 PRESS SENSOR [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1142 PRESS SENSOR
A
Description
INFOID:0000000001635095
The pressure sensor converts the brake fluid pressure to an electric signal and transmits it to the ABS actuator and electric unit (control unit). [The pressure sensor is integrated in the ABS actuator and electric unit (control unit).]
B
DTC Logic
C
INFOID:0000000001635096
DTC DETECTION LOGIC D DTC
C1142
Display item
PRESS SEN CIRCUIT
Malfunction detected condition
Possible cause
Pressure sensor signal line is open or shorted, or pressure sensor is malfunctioning.
• Harness or connector • Stop lamp switch • ABS actuator and electric unit (control unit)
DTC CONFIRMATION PROCEDURE
E
BRC
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results.
G
Self-diagnosis results PRESS SEN CIRCUIT
H
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-57, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
I INFOID:0000000001635097
1.CHECK STOP LAMP SWITCH CONNECTOR
J
1. 2. 3. 4.
K
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Disconnect stop lamp switch connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 5. Reconnect connectors securely. 6. Start engine. 7. Repeat pumping brake pedal carefully several times, and perform self-diagnosis. Is the inspection result normal? YES >> GO TO 2. NO >> Poor connection of connector terminal. Repair or replace connector.
L
M
2.CHECK STOP LAMP SWITCH
N
1. 2. 3.
O
Turn ignition switch OFF. Disconnect stop lamp switch connector. Check continuity between stop lamp switch connector terminals. Stop lamp switch
Condition
Connector
Terminal
E110
1 – 2 (Without ICC models) 3 − 4 (With ICC models)
Release stop lamp switch (When brake pedal is depressed.) Push stop lamp switch (When brake pedal is released.)
Continuity Existed Not existed
Is the inspection result normal? YES >> GO TO 3. Revision: 2007 June
BRC-57
G37 Coupe
P
C1142 PRESS SENSOR [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS > NO >> Replace stop lamp switch.
3.CHECK STOP LAMP SWITCH CIRCUIT 1. 2. 3.
Disconnect ABS actuator and electric unit (control unit) connector. Connect stop lamp switch connector. Check voltage between ABS actuator and electric unit (control unit) harness connector terminal and ground. ABS actuator and electric unit (control unit) Connector
Terminal
E41
30
Condition Brake pedal is depressed Brake pedal is released
Voltage Battery voltage Approx. 0 V
Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace malfunctioning components.
Component Inspection
INFOID:0000000001635098
1.CHECK DATA MONITOR On “DATA MONITOR”, select “PRESS SENSOR” and check the brake fluid pressure. Condition With ignition switch turned ON and brake pedal released. With ignition switch turned ON and brake pedal depressed.
PRESS SENSOR (DATA MONITOR) Approx. 0 bar − 40 to 300 bar
Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-57, "Diagnosis Procedure".
Special Repair Requirement
INFOID:0000000001635099
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description". >> END
Revision: 2007 June
BRC-58
G37 Coupe
C1143, C1144 STEERING ANGLE SENSOR [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1143, C1144 STEERING ANGLE SENSOR
A
Description
INFOID:0000000001635100
The steering angle sensor detects the rotation amount, angular velocity and direction of the steering wheel, and transmits the data to the ABS actuator and electric unit (control unit) via CAN communication.
DTC Logic
B
INFOID:0000000001635101
C
DTC DETECTION LOGIC DTC
Display item
Possible cause
D
• Harness or connector • Steering angle sensor • 4WAS control unit (4WAS models) • ABS actuator and electric unit (control unit)
E
Malfunction detected condition
C1143
ST ANG SEN CIRCUIT
Steering angle sensor is malfunctioning.
C1144
ST ANG SEN SIGNAL
Neutral position of steering angle sensor is not finished.
BRC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS G
Check the self-diagnosis results. Self-diagnosis results
H
ST ANG SEN CIRCUIT ST ANG SEN SIGNAL
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-59, "Diagnosis Procedure". NO >> INSPECTION END
I
J
Diagnosis Procedure
INFOID:0000000001635102
1.VEHICLE INSPECTION Check that the vehicle equips 4WAS. Does the vehicle equips 4WAS? YES >> Check 4WAS system. Refer to STC-39, "CONSULT-III Function [4WAS(FRONT)]" (4WAS FRONT CONTROL UNIT), STC-43, "CONSULT-III Function [4WAS(MAIN)/RAS/HICAS]" (4WAS MAIN CONTROL UNIT). NO >> GO TO 2.
2.CHECK CONNECTOR 1. 2. 3. 4.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Disconnect steering angle sensor connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 5. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 3. NO >> Poor connection of connector terminal. Repair or replace connector.
3.CHECK STEERING ANGLE SENSOR HARNESS 1. 2. 3.
Turn ignition switch OFF. Disconnect steering angle sensor connector. Check continuity between steering angle sensor harness connector terminal and ground.
Revision: 2007 June
BRC-59
G37 Coupe
K
L
M
N
O
P
C1143, C1144 STEERING ANGLE SENSOR [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS > Steering angle sensor
4. 5.
Connector
Terminal
M37
7
—
Continuity
Ground
Existed
Turn ignition switch ON. Check voltage between steering angle sensor harness connector terminal and ground. Steering angle sensor Connector
Terminal
M37
8
—
Voltage
Ground
Battery voltage
Is the inspection result normal? YES >> GO TO 4. NO >> Replace steering angle sensor and adjust neutral position of steering angle sensor.
4.CHECK DATA MONITOR 1. 2.
Connect the steering angle sensor connector and ABS actuator and electric unit (control unit) connector. Select “STR ANGLE SIG” in “DATA MONITOR” and check steering angle sensor signal. Steering condition
Straight-ahead
STR ANGLE SIG (DATA MONITOR) ±2.5 °
Turn 90 ° to right
Approx. +90 °
Turn 90 ° to left
Approx. −90 °
Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Replace steering angle sensor and adjust neutral position of steering angle sensor.
Component Inspection
INFOID:0000000001635103
1.CHECK DATA MONITOR Select “STR ANGLE SIG” in “DATA MONITOR” and check steering angle sensor signal. Steering condition Straight-ahead
STR ANGLE SIG (DATA MONITOR) ±2.5 °
Turn 90 ° to right
Approx. +90 °
Turn 90 ° to left
Approx. −90 °
Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-59, "Diagnosis Procedure".
Special Repair Requirement
INFOID:0000000001635104
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the steering angle sensor or the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description". >> END
Revision: 2007 June
BRC-60
G37 Coupe
C1145, C1146 YAW RATE/SIDE G SENSOR [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1145, C1146 YAW RATE/SIDE G SENSOR
A
Description
INFOID:0000000001635105
The yaw rate/side G sensor detects the yaw rate/side G affecting the vehicle, and transmits the data to the ABS actuator and electric unit (control unit) as an analog voltage signal.
DTC Logic
B
INFOID:0000000001635106
C
DTC DETECTION LOGIC DTC
Display item
Malfunction detected condition
Possible cause • Harness or connector • ABS actuator and electric unit (control unit) • Yaw rate/side G sensor
C1145
YAW RATE SENSOR
Yaw rate sensor is malfunctioning, or the yaw rate sensor signal line is open or shorted.
C1146
SIDE G-SEN CIRCUIT
Side G sensor is malfunctioning, or circuit of side G sensor is open or shorted.
DTC CONFIRMATION PROCEDURE
D
E
BRC
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results.
G Self-diagnosis results YAW RATE SENSOR
H
SIDE G-SEN CIRCUIT
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-61, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
I INFOID:0000000001635107
J
CAUTION: • Sudden turns (such as spin turns, acceleration turns), drifting, etc., when VDC function is off (VDC OFF switch “ON”) may cause yaw rate/side G sensor system to indicate a malfunction. However, this is not a malfunction, if normal operation can be resumed after restarting engine. Then erase memory of self-diagnosis. • If vehicle is on turn-table at entrance to parking garage, or on other moving surface, VDC OFF indicator lamp may illuminate and CONSULT-III self-diagnosis may indicate yaw rate sensor system malfunction. However, in this case there is no malfunction in yaw rate sensor system. Take vehicle off of turn-table or other moving surface, and start engine. Results will return to normal. And after doing spin turns or acceleration turns with VDC function is being off (VDC OFF switch “ON”), too, the results will return to a normal condition by re-starting vehicle.
K
L
M
INSPECTION PROCEDURE
1.CHECK CONNECTOR
N
1. 2. 3. 4.
O
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Disconnect yaw rate/side G sensor connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 5. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 2. NO >> Poor connection of connector terminal. Repair or replace connector.
2.CHECK YAW RATE/SIDE G SENSOR POWER SUPPLY CIRCUIT 1. 2.
Turn ignition switch OFF. Disconnect yaw rate/side G sensor connector.
Revision: 2007 June
BRC-61
G37 Coupe
P
C1145, C1146 YAW RATE/SIDE G SENSOR [VDC/TCS/ABS] < COMPONENT DIAGNOSIS > 3. Turn ignition switch ON or OFF and check voltage between yaw rate/side G sensor harness connector terminal and ground. Yaw rate/side G sensor Connector
Terminal
M143
4
—
Condition
Ground
Voltage
Ignition switch: ON
Battery voltage
Ignition switch: OFF
Approx. 0 V
Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace malfunctioning components.
3.CHECK YAW RATE/SIDE G SENSOR GROUND CIRCUIT Check continuity between yaw rate/side G sensor harness connector terminal and ground. Yaw rate/side G sensor Connector
Terminal
M143
1
—
Continuity
Ground
Existed
Is the inspection result normal? YES >> GO TO 4. NO >> Repair or replace malfunctioning components.
4.CHECK YAW RATE/SIDE G SENSOR HARNESS 1. 2.
Disconnect yaw rate/side G sensor connector and ABS actuator and electric unit (control unit) connector. Check continuity between yaw rate/side G sensor harness connector terminals and ABS actuator and electric unit (control unit) harness connector terminals. ABS actuator and electric unit (control unit) Connector
Terminal 25
E41
45
Yaw rate/side G sensor Connector M143
Terminal 2 3
Continuity
Existed
Is the inspection result normal? YES >> GO TO 5. NO >> Repair or replace malfunctioning components.
5.CHECK DATA MONITOR 1. 2.
Connect the yaw rate/side G sensor connector and ABS actuator and electric unit (control unit) connector. Select “YAW RATE SEN”, “SIDE G-SENSOR” in “DATA MONITOR” and check yaw rate/side G sensor signal. YAW RATE SEN (DATA MONITOR)
SIDE G-SENSOR (DATA MONITOR)
Approx. 0 d/s
Approx. 0 m/s2
Turning right
Negative value
Negative value
Turning left
Positive value
Positive value
Vehicle condition Vehicle stopped
Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Replace yaw rate/side G sensor.
Component Inspection
INFOID:0000000001635108
1.CHECK DATA MONITOR Select “YAW RATE SEN”, “SIDE G-SENSOR” in “DATA MONITOR” and check yaw rate/side G sensor signal.
Revision: 2007 June
BRC-62
G37 Coupe
C1145, C1146 YAW RATE/SIDE G SENSOR [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS > YAW RATE SEN (DATA MONITOR)
SIDE G-SENSOR (DATA MONITOR)
Approx. 0 d/s
Approx. 0 m/s2
Turning right
Negative value
Negative value
Turning left
Positive value
Positive value
Vehicle condition Vehicle stopped
A
B
Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-61, "Diagnosis Procedure".
Special Repair Requirement
C
INFOID:0000000001635109
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description".
D
E
BRC
>> END G
H
I
J
K
L
M
N
O
P
Revision: 2007 June
BRC-63
G37 Coupe
C1147, C1148, C1149, C1150 USV/HSV LINE [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1147, C1148, C1149, C1150 USV/HSV LINE Description
INFOID:0000000001635110
USV1, USV2 (CUT VALVE) The cut valve shuts off the normal brake fluid path from the master cylinder, when VDC/TCS is activated.
HSV1, HSV2 (SUCTION VALVE) The suction valve supplies the brake fluid from the master cylinder to the pump, when VDC/TCS is activated.
DTC Logic
INFOID:0000000001635111
DTC DETECTION LOGIC DTC
Display item
Malfunction detected condition
C1147
USV LINE [FL-RR]
VDC switch-over solenoid valve (USV1) on the primary side is open circuit or shorted, or the control line is open or shorted to the power supply or the ground.
C1148
USV LINE [FR-RL]
VDC switch-over solenoid valve (USV2) on the primary side is open circuit or shorted, or the control line is open or shorted to the power supply or the ground.
C1149
HSV LINE [FL-RR]
VDC switch-over solenoid valve (HSV1) on the primary side is open circuit or shorted, or the control line is open or shorted to the power supply or the ground.
C1150
HSV LINE [FR-RL]
VDC switch-over solenoid valve (HSV2) on the primary side is open circuit or shorted, or the control line is open or shorted to the power supply or the ground.
Possible cause
• Harness or connector • ABS actuator and electric unit (control unit)
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results. Self-diagnosis results USV LINE [FL-RR] USV LINE [FR-RL] HSV LINE [FL-RR] HSV LINE [FR-RL]
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-64, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
INFOID:0000000001635112
1.CHECK CONNECTOR 1. 2. 3.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 4. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 2. NO >> Poor connection of connector terminal. Repair or replace connector.
2.CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACTUATOR RELAY POWER SUPPLY CIRCUIT 1. 2.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector.
Revision: 2007 June
BRC-64
G37 Coupe
C1147, C1148, C1149, C1150 USV/HSV LINE [VDC/TCS/ABS] < COMPONENT DIAGNOSIS > 3. Check voltage between ABS actuator and electric unit (control unit) harness connector terminal and ground. ABS actuator and electric unit (control unit) Connector
Terminal
E41
3
—
Voltage
Ground
Battery voltage
A
B
Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace malfunctioning components.
C
3.CHECK SOLENOID, VDC SWITCH-OVER VALVE AND ACUATOR RELAY GROUND CIRCUIT
D
Check continuity between ABS actuator and electric unit (control unit) harness connector terminals and ground. E ABS actuator and electric unit (control unit) Connector
Terminal
E41
1, 4
—
Continuity
Ground
Existed
BRC
Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace malfunctioning components.
G
Component Inspection
INFOID:0000000001635113
H
1.CHECK ACTIVE TEST 1. 2.
Select each test menu item on ”ACTIVE TEST“. On the display, touch “Up”, “ACT UP”, and “ACT KEEP”, and check that the system operates as shown in the table below. Test item
FR RH ABS SOLENOID (ACT)
FR LH ABS SOLENOID (ACT)
RR RH ABS SOLENOID (ACT)
RR LH ABS SOLENOID (ACT)
Display item (Note)
J
Display Up
ACT UP
ACT KEEP
FR RH IN SOL
Off
Off
Off
FR RH OUT SOL
Off
Off
Off
USV [FR-RL]
Off
On
On
HSV [FR-RL]
Off
On*
Off
FR LH IN SOL
Off
Off
Off
FR LH OUT SOL
Off
Off
Off
USV [FL-RR]
Off
On
On
HSV [FL-RR]
Off
On*
Off
RR RH IN SOL
Off
Off
Off
RR RH OUT SOL
Off
Off
Off
USV [FL-RR]
Off
On
On
HSV [FL-RR]
Off
On*
Off
RR LH IN SOL
Off
Off
Off
RR LH OUT SOL
Off
Off
Off
USV [FR-RL]
Off
On
On
HSV [FR-RL]
Off
On*
Off
*: On for 1 to 2 seconds after the touch, and then Off. NOTE: A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking.
Revision: 2007 June
BRC-65
I
G37 Coupe
K
L
M
N
O
P
C1147, C1148, C1149, C1150 USV/HSV LINE < COMPONENT DIAGNOSIS > Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-64, "Diagnosis Procedure".
Special Repair Requirement
[VDC/TCS/ABS]
INFOID:0000000001635114
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description". >> END
Revision: 2007 June
BRC-66
G37 Coupe
C1155 BRAKE FLUID LEVEL SWITCH [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1155 BRAKE FLUID LEVEL SWITCH
A
Description
INFOID:0000000001635115
The brake fluid level switch converts the brake fluid level to an electric signal and transmits it to the ABS actuator and electric unit (control unit).
DTC Logic
B
INFOID:0000000001635116
C
DTC DETECTION LOGIC DTC C1155
Display item BR FLUID LEVEL LOW
Malfunction detected condition Brake fluid level is low or communication line between the ABS actuator and electric unit (control unit) and brake fluid level switch is open or shorted.
Possible cause • Harness or connector • Brake fluid level switch • Unified meter and A/C amp.
D
E
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
BRC
Check the self-diagnosis results. G
Self-diagnosis results BR FLUID LEVEL LOW
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-67, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
H
INFOID:0000000001635117
I
Turn ignition switch OFF. Disconnect brake fluid level switch connector and unified meter and A/C amp. connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. 4. Reconnect connectors and then perform the self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> GO TO 2. NO >> Poor connection of connector terminal. Repair or replace connector.
J
1.CHECK CONNECTOR 1. 2. 3.
K
L
2.CHECK BRAKE FLUID LEVEL SWITCH 1. 2. 3.
M
Turn ignition switch OFF. Disconnect brake fluid level switch connector. Check continuity between brake fluid level switch connector terminals.
N Brake fluid level switch Connector
Terminal
E47
1−2
Condition When brake fluid is full in the reservoir tank. When brake fluid is empty in the reservoir tank.
Continuity Not existed Existed
Is the inspection result normal? YES >> GO TO 3. NO >> Brake fluid level switch is malfunction. Replace reservoir tank.
P
3.CHECK BRAKE FLUID LEVEL SWITCH CIRCUIT 1. 2.
Disconnect unified meter and A/C amp. connector. Check continuity between brake fluid level switch harness connector terminals, unified meter and A/C amp. harness connector terminal and/or ground.
Revision: 2007 June
BRC-67
O
G37 Coupe
C1155 BRAKE FLUID LEVEL SWITCH [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS > Unified meter and A/C amp.
Brake fluid level switch
Connector
Terminal
Connector
Terminal
M67
57
E47
1
Unified meter and A/C amp. Connector
Terminal
M67
57
Terminal
E47
2
Existed
—
Continuity
Ground
Not existed
—
Continuity
Ground
Existed
Brake fluid level switch Connector
Continuity
Is the inspection result normal? YES >> Replace unified meter and A/C amp. NO >> Repair or replace malfunctioning components.
Component Inspection
INFOID:0000000001635118
1.CHECK BRAKE FLUID LEVEL SWITCH 1. 2. 3.
Turn ignition switch OFF. Disconnect brake fluid level switch connector. Check continuity between brake fluid level switch connector terminals. Brake fluid level switch Connector
Terminal
E47
1−2
Condition When brake fluid is full in the reservoir tank. When brake fluid is empty in the reservoir tank.
Continuity Not existed Existed
Is the inspection result normal? YES >> INSPECTION END NO >> Replace reservoir tank.
Special Repair Requirement
INFOID:0000000001635119
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description". >> END
Revision: 2007 June
BRC-68
G37 Coupe
C1185 ICC UNIT [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
C1185 ICC UNIT
A
Description
INFOID:0000000001751278
The ABS actuator and electric unit (control unit) and the ICC sensor integrated unit exchange signals via the CAN communication line.
DTC Logic
B
INFOID:0000000001751279
C
DTC DETECTION LOGIC DTC
C1185
Display item
ACC CONT
Possible cause
D
• Harness or connector • ICC sensor integrated unit • ABS actuator and electric unit (control unit) • CAN communication line
E
Malfunction detected condition
ICC sensor integrated unit internal malfunction.
DTC CONFIRMATION PROCEDURE
BRC
1.CHECK SELF-DIAGNOSIS RESULTS Check the self-diagnosis results.
G
Self-diagnosis results ACC CONT
H
Is above displayed on the self-diagnosis display? YES >> Proceed to diagnosis procedure. Refer to BRC-69, "Diagnosis Procedure". NO >> INSPECTION END
Diagnosis Procedure
I INFOID:0000000001751280
1.CHECK ICC SENSOR INTEGRATED UNIT CIRCUIT
J
Perform ICC sensor integrated unit self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> Repair or replace malfunction components. NO >> GO TO 2.
K
2.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
L
Perform ABS actuator and electric unit (control unit) self-diagnosis. Is any item indicated on the self-diagnosis display? YES >> Repair or replace malfunction components. NO >> INSPECTION END
M
Special Repair Requirement
INFOID:0000000001751282
N
Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description".
O
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
P
>> END
Revision: 2007 June
BRC-69
G37 Coupe
U1000, U1002 CAN COMM CIRCUIT [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
U1000, U1002 CAN COMM CIRCUIT Description
INFOID:0000000001635120
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.
DTC Logic
INFOID:0000000001635121
DTC DETECTION LOGIC DTC
Display item
Malfunction detected condition
U1000
CAN COMM CIRCUIT
When ABS actuator and electric unit (control unit) is not transmitting or receiving CAN communication signal for 2 seconds or more.
U1002
SYSTEM COMM
When ABS actuator and electric unit (control unit) is not transmitting or receiving CAN communication signal for 2 seconds or less.
Diagnosis Procedure
Possible cause
• CAN communication line • ABS actuator and electric unit (control unit)
INFOID:0000000001635122
1.CHECK CONNECTOR 1. 2. 3. 4.
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal. Reconnect connector and perform self-diagnosis. Self-diagnosis results CAN COMM CIRCUIT SYSTEM COMM
Is above displayed on the self-diagnosis display? YES >> Go to LAN-25, "CAN System Specification Chart". NO >> INSPECTION END
Special Repair Requirement
INFOID:0000000001635123
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description". >> END
Revision: 2007 June
BRC-70
G37 Coupe
PARKING BRAKE SWITCH [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
PARKING BRAKE SWITCH
A
Description
INFOID:0000000001635124
The parking brake switch converts the status of the parking brake lever (M/T models) or the parking brake pedal (A/T models) to an electric signal and transmits it to the ABS actuator and electric unit (control unit).
Component Function Check
INFOID:0000000001635125
C
1.CHECK PARKING BRAKE SWITCH OPERATION Operate the parking brake lever (M/T models) or the parking brake pedal (A/T models). Then check that the brake warning lamp in the combination meter turns on/off correctly. Condition
D
Brake warning lamp illumination status
E
When the parking brake switch is operation
ON
When the parking brake switch is not operation.
OFF
BRC
Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-71, "Diagnosis Procedure".
Diagnosis Procedure
G INFOID:0000000001635126
H
1.CHECK PARKING BRAKE SWITCH 1. 2. 3.
B
Turn ignition switch OFF. Disconnect parking brake switch connector. Check continuity between parking brake switch connector terminal. Parking brake switch Connector
Terminal
B14 (M/T models) E107 (A/T models)
1
—
Ground
Condition When the parking brake switch is operated. When the parking brake switch is not operated.
I
Continuity
J
Existed Not existed
Is the inspection result normal? YES >> GO TO 2. NO >> Replace parking brake switch.
K
L
2.CHECK COMBINATION METER Check if the indication and operation of combination meter are normal. Refer to MWI-35, "Diagnosis Description". Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace combination meter.
M
N
3.CHECK DATA MONITOR On “DATA MONITOR”, select “PARK BRAKE SW” and perform the parking brake switch inspection. Condition
PARK BRAKE SW (DATA MONITOR)
Parking brake switch is active
On
Parking brake switch is inactive
Off
P
Is the inspection result normal? YES >> INSPECTION END NO >> Check unified meter and A/C amp. Refer to MWI-37, "CONSULT-III Function (METER/M&A)".
Revision: 2007 June
BRC-71
O
G37 Coupe
PARKING BRAKE SWITCH [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
Component Inspection
INFOID:0000000001635127
1.CHECK PARKING BRAKE SWITCH 1. 2. 3.
Turn ignition switch OFF. Disconnect parking brake switch connector. Check continuity between parking brake switch connector terminal. Parking brake switch Connector
Terminal
B14 (M/T models) E107 (A/T models)
1
—
Ground
Condition When the parking brake switch is operated. When the parking brake switch is not operated.
Continuity Existed Not existed
Is the inspection result normal? YES >> INSPECTION END NO >> Replace parking brake switch.
Revision: 2007 June
BRC-72
G37 Coupe
VDC OFF SWITCH [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
VDC OFF SWITCH
A
Description
INFOID:0000000001635128
VDC OFF switch can deactivate (turn OFF) the VDC/TCS function by pressing the VDC OFF switch.
Component Function Check
B
INFOID:0000000001635129
1.CHECK VDC OFF SWITCH OPERATION
C
Turn ON/OFF the VDC OFF switch and check that the VDC OFF indicator lamp in the combination meter turns ON/OFF correctly. D Condition
VDC OFF indicator lamp illumination status
VDC OFF switch: ON
ON
VDC OFF switch: OFF
OFF
E
Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-73, "Diagnosis Procedure".
Diagnosis Procedure
BRC
INFOID:0000000001635130
G
1.CHECK VDC OFF SWITCH 1. 2. 3.
Turn ignition switch OFF. Disconnect VDC OFF switch connector. Check continuity between VDC OFF switch connector terminals.
H
I
VDC OFF switch Connector
Terminal
M19
1−2
Condition When VDC OFF switch is hold pressed. When releasing VDC OFF switch.
Continuity Existed
J
Not existed
Is the inspection result normal? YES >> GO TO 2. NO >> VDC OFF switch is malfunctioning. Replace VDC OFF switch.
K
2.CHECK VDC OFF SWITCH HARNESS 1. 2.
Disconnect ABS actuator and electric unit (control unit) connector. Check continuity between VDC OFF switch connector terminals and ABS actuator and electric unit (control unit) connector terminal and/or ground. ABS actuator and electric unit (control unit)
VDC OFF switch
Continuity
Connector
Terminal
Connector
Terminal
E41
31
M19
1
L
M
N
Existed
O ABS actuator and electric unit (control unit) Connector
Terminal
E41
31
VDC OFF switch Connector
Terminal
M19
2
—
Continuity
Ground
Not existed
—
Continuity
Ground
Existed
P
Is the inspection result normal? Revision: 2007 June
BRC-73
G37 Coupe
VDC OFF SWITCH < COMPONENT DIAGNOSIS > YES >> GO TO 3. NO >> If the open or short in harness, repair or replace harness.
[VDC/TCS/ABS]
3.CHECK COMBINATION METER Check if the indication and operation of combination meter are normal. Refer to MWI-35, "Diagnosis Description". Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace combination meter.
Component Inspection
INFOID:0000000001635131
1.CHECK VDC OFF SWITCH 1. 2. 3.
Turn ignition switch OFF. Disconnect VDC OFF switch connector. Check continuity between VDC OFF switch connector terminals. VDC OFF switch Connector
Terminal
M19
1−2
Condition When VDC OFF switch is hold pressed. When releasing VDC OFF switch.
Continuity Existed Not existed
Is the inspection result normal? YES >> INSPECTION END NO >> Replace VDC OFF switch.
Revision: 2007 June
BRC-74
G37 Coupe
ABS WARNING LAMP [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
ABS WARNING LAMP
A
Description
INFOID:0000000001635132
×: ON –: OFF
Condition
B
ABS warning lamp
Ignition switch OFF
–
For 1 second after turning ON ignition switch
×
1 second later after turning ON ignition switch
–
ABS function is malfunctioning.
×
EBD function is malfunctioning.
×
Component Function Check
C
D
INFOID:0000000001635133
E
1.CHECK ABS WARNING LAMP OPERATION Check that the lamp illuminates for approximately 1 second after the ignition switch is turned ON. Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-75, "Diagnosis Procedure".
Diagnosis Procedure
BRC
G
INFOID:0000000001635134
1.CHECK SELF-DIAGNOSIS
H
Perform ABS actuator and electric unit (control unit) self-diagnosis. Is the inspection result normal? YES >> GO TO 2. NO >> Check items displayed by self-diagnosis.
I
2.CHECK COMBINATION METER
J
Check if the indication and operation of combination meter are normal. Refer to MWI-35, "Diagnosis Description". Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace combination meter.
K
L
M
N
O
P
Revision: 2007 June
BRC-75
G37 Coupe
BRAKE WARNING LAMP [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
BRAKE WARNING LAMP Description
INFOID:0000000001635135
×: ON –: OFF
Condition
Brake warning lamp (Note 1)
Ignition switch OFF
–
For 1 second after turning ignition switch ON
× (Note 2)
1 second later after turning ignition switch ON
× (Note 2) ×
EBD function is malfunctioning. NOTE:
• 1: Brake warning lamp will turn on in case of parking brake operation (when switch is ON) or of brake fluid level switch operation (when brake fluid is insufficient). • 2: After starting engine, brake warning lamp is turned off.
Component Function Check
INFOID:0000000001635136
1.BRAKE WARNING LAMP OPERATION CHECK 1 Check that the lamp illuminates for approximately 1 second after the ignition switch is turned ON. Is the inspection result normal? YES >> GO TO 2. NO >> Go to diagnosis procedure. Refer to BRC-76, "Diagnosis Procedure".
2.BRAKE WARNING LAMP OPERATION CHECK 2 Check that the brake warning lamp in the combination meter turns ON/OFF correctly when operating the parking brake lever (M/T models) or the parking brake pedal (A/T models). Is the inspection result normal? YES >> INSPECTION END NO >> Check parking brake switch. Refer to BRC-71, "Diagnosis Procedure".
Diagnosis Procedure
INFOID:0000000001635137
1.CHECK PARKING BRAKE SWITCH Check that the brake warning lamp in the combination meter turns ON/OFF correctly when operating the parking brake lever (M/T models) or the parking brake pedal (A/T models). Is the inspection result normal? YES >> GO TO 2. NO >> Check parking brake switch. Refer to BRC-71, "Diagnosis Procedure".
2.CHECK SELF-DIAGNOSIS Perform ABS actuator and electric unit (control unit) self-diagnosis. Is the inspection result normal? YES >> GO TO 3. NO >> Check items displayed by self-diagnosis.
3.CHECK COMBINATION METER Check if the indication and operation of combination meter are normal. Refer to MWI-35, "Diagnosis Description". Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace combination meter.
Revision: 2007 June
BRC-76
G37 Coupe
VDC OFF INDICATOR LAMP [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
VDC OFF INDICATOR LAMP
A
Description
INFOID:0000000001635138
×: ON –: OFF
Condition
B
VDC OFF indicator lamp
Ignition switch OFF
–
For 1 second after turning ignition switch ON
×
1 second later after turning ignition switch ON
–
VDC OFF switch turned ON. (VDC function is OFF.)
×
VDC/TCS function is malfunctioning.
×
ABS function is malfunctioning.
×
EBD function is malfunctioning.
×
Component Function Check
C
D
E INFOID:0000000001635139
BRC
1.VDC OFF INDICATOR LAMP OPERATION CHECK 1 Check that the lamp illuminates for approximately 1 second after the ignition switch is turned ON. Is the inspection result normal? YES >> GO TO 2. NO >> Go to diagnosis procedure. Refer to BRC-77, "Diagnosis Procedure".
G
2.VDC OFF INDICATOR LAMP OPERATION CHECK 2
H
Check that the VDC OFF indicator lamp in the combination meter turns ON/OFF correctly when operating the VDC OFF switch. Is the inspection result normal? YES >> INSPECTION END NO >> Check VDC OFF switch. Refer to BRC-73, "Diagnosis Procedure".
Diagnosis Procedure
I
J
INFOID:0000000001635140
1.CHECK VDC OFF SWITCH
K
Check that the VDC OFF indicator lamp in the combination meter turns ON/OFF correctly when operating the VDC OFF switch. Is the inspection result normal? YES >> GO TO 2. NO >> Check VDC OFF switch. Refer to BRC-73, "Diagnosis Procedure".
L
2.CHECK SELF-DIAGNOSIS
M
Perform ABS actuator and electric unit (control unit) self-diagnosis. Is the inspection result normal? YES >> GO TO 3. NO >> Check items displayed by self-diagnosis.
N
3.CHECK COMBINATION METER
O
Check if the indication and operation of combination meter are normal. Refer to MWI-35, "Diagnosis Description". Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace combination meter.
P
Revision: 2007 June
BRC-77
G37 Coupe
SLIP INDICATOR LAMP [VDC/TCS/ABS]
< COMPONENT DIAGNOSIS >
SLIP INDICATOR LAMP Description
INFOID:0000000001635141
×: ON –: OFF
Condition
SLIP indicator lamp
Ignition switch OFF
–
For 1 second after turning ignition switch ON
×
1 second later after turning ignition switch ON
–
VDC/TCS function is malfunctioning.
×
ABS function is malfunctioning.
×
EBD function is malfunctioning.
×
Component Function Check
INFOID:0000000001635142
1.CHECK SLIP INDICATOR LAMP OPERATION Check that the lamp illuminates for approximately 1 second after the ignition switch is turned ON. Is the inspection result normal? YES >> INSPECTION END NO >> Go to diagnosis procedure. Refer to BRC-78, "Diagnosis Procedure".
Diagnosis Procedure
INFOID:0000000001635143
1.CHECK SELF-DIAGNOSIS Perform ABS actuator and electric unit (control unit) self-diagnosis. Is the inspection result normal? YES >> GO TO 2. NO >> Check items displayed by self-diagnosis.
2.CHECK COMBINATION METER Check if the indication and operation of combination meter are normal. Refer to MWI-35, "Diagnosis Description". Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). NO >> Repair or replace combination meter.
Revision: 2007 June
BRC-78
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< ECU DIAGNOSIS >
ECU DIAGNOSIS
A
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) Reference Value
INFOID:0000000001635144
B
VALUES ON THE DIAGNOSIS TOOL CAUTION: The display shows the control unit calculation data, so a normal value might be displayed even in the event the output circuit (harness) is open or short-circuited. CONSULT-III MONITOR ITEM
D
Data monitor Monitor item
FR LH SENSOR
FR RH SENSOR
RR LH SENSOR
RR RH SENSOR
Display content
Condition
Wheel speed
Wheel speed
Wheel speed
Wheel speed
0 [km/h (MPH)]
Vehicle running (Note 1)
Nearly matches the speed meter display (± 10 % or less)
Vehicle stopped
0 [km/h (MPH)]
Vehicle running (Note 1)
Nearly matches the speed meter display (± 10 % or less)
Vehicle stopped
0 [km/h (MPH)]
Vehicle running (Note 1)
Nearly matches the speed meter display (± 10 % or less)
Vehicle stopped
0 [km/h (MPH)]
Vehicle running (Note 1)
Nearly matches the speed meter display (± 10 % or less)
When brake pedal is depressed
On
When brake pedal is not depressed
Off
Stop lamp switch signal status
BATTERY VOLT
Battery voltage supplied to the ABS actuator and electric unit (control unit)
Ignition switch ON
A/T selector lever position
P position R position N position D position
SLCT LVR POSI
OFF SW
VDC OFF switch ON/OFF
Off
ACCEL POS SIG
Revision: 2007 June
Accelerator pedal not depressed (ignition switch is ON) Depress accelerator pedal (ignition switch is ON)
BRC-79
BRC
G
H
I
J
K
L
M
VDC OFF switch OFF (When VDC OFF indicator lamp is OFF)
Turning left Throttle actuator opening/closing is displayed (linked with accelerator pedal)
P R N D On
Yaw rate detected by yaw rate/side G sensor Turning right
E
10 – 16 V
VDC OFF switch ON (When VDC OFF indicator lamp is ON)
Vehicle stopped YAW RATE SEN
Reference value in normal operation
Vehicle stopped
STOP LAMP SW
C
N
Approx. 0 d/s Negative value Positive value
O
0%
P 0 - 100 %
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< ECU DIAGNOSIS > Data monitor Monitor item
Display content
Condition Vehicle stopped
SIDE G-SENSOR
Transverse G detected by side G sensor
Turning right Turning left Straight-ahead
STR ANGLE SIG
PRESS SENSOR
Steering angle detected by steering angle sensor
Brake fluid pressure detected by pressure sensor
With engine running
FLUID LEV SW
Brake fluid level switch signal status
PARK BRAKE SW
Parking brake switch signal status
FR RH IN SOL
FR RH OUT SOL
FR LH IN SOL
FR LH OUT SOL
RR RH IN SOL
Revision: 2007 June
Operation status of each solenoid valve
Operation status of each solenoid valve
Operation status of each solenoid valve
Operation status of each solenoid valve
Negative value (m/s2) Positive value (m/s2) ±2.5° Approx. +90°
Turn 90° to left
Approx. −90°
With ignition switch turned ON and brake pedal released
Approx. 0 bar
With ignition switch turned ON and brake pedal depressed
–40 to 300 bar
Engine running
Operation status of each solenoid valve
Approx. 0 m/s2
Turn 90° to right
With engine stopped ENGINE RPM
Reference value in normal operation
0 [tr/min (rpm)] Almost in accordance with tachometer display
When brake fluid level switch ON
On
When brake fluid level switch OFF
Off
Parking brake switch is active
On
Parking brake switch is inactive
Off
Actuator (solenoid valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (in fail-safe mode)
On
When the actuator (solenoid valve) is not active and actuator relay is active (ignition switch ON)
Off
Actuator (solenoid valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (in fail-safe mode)
On
When the actuator (solenoid valve) is not active and actuator relay is active (ignition switch ON)
Off
Actuator (solenoid valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (in fail-safe mode)
On
When the actuator (solenoid valve) is not active and actuator relay is active (ignition switch ON)
Off
Actuator (solenoid valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (in fail-safe mode)
On
When the actuator (solenoid valve) is not active and actuator relay is active (ignition switch ON)
Off
Actuator (solenoid valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (in fail-safe mode)
On
When the actuator (solenoid valve) is not active and actuator relay is active (ignition switch ON)
Off
BRC-80
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< ECU DIAGNOSIS > Data monitor Monitor item
RR RH OUT SOL
RR LH IN SOL
RR LH OUT SOL
MOTOR RELAY
Display content
Operation status of each solenoid valve
Operation status of each solenoid valve
Operation status of each solenoid valve
Motor and motor relay operation
Reference value in normal operation
Actuator (solenoid valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (in fail-safe mode)
On
B
When the actuator (solenoid valve) is not active and actuator relay is active (ignition switch ON)
Off
C
Actuator (solenoid valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (in fail-safe mode)
On
D
When the actuator (solenoid valve) is not active and actuator relay is active (ignition switch ON)
Off
Actuator (solenoid valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (in fail-safe mode)
On
When the actuator (solenoid valve) is not active and actuator relay is active (ignition switch ON)
Off
When the motor relay and motor are operating
On
When the motor relay and motor are not operating
Off
When the actuator relay is operating
On
When the actuator relay is not operating
Off
G
Actuator relay operation
ABS WARN LAMP
ABS warning lamp (Note 3)
When ABS warning lamp is ON
On
When ABS warning lamp is OFF
Off
OFF LAMP
VDC OFF indicator lamp (Note 3)
When VDC OFF indicator lamp is ON
On
When VDC OFF indicator lamp is OFF
Off
SLIP LAMP
SLIP indicator lamp (Note 3)
When SLIP indicator lamp is ON
On
When SLIP indicator lamp is OFF
Off
BST OPER SIG
Not applied but displayed
EBD SIGNAL
EBD operation
ABS SIGNAL
ABS operation
TCS SIGNAL
TCS operation
VDC SIGNAL
VDC operation
EBD fail-safe signal
ABS FAIL SIG
ABS fail-safe signal
TCS FAIL SIG
TCS fail-safe signal
VDC FAIL SIG
VDC fail-safe signal
Revision: 2007 June
—
H
I
J
K
Off
EBD is active
On
EBD is inactive
Off
ABS is active
On
ABS is inactive
Off
TCS is active
On
TCS is inactive
Off
VDC is active
On
VDC is inactive
Off
In EBD fail-safe
On
EBD is normal
Off
In ABS fail-safe
On
ABS is normal
Off
In TCS fail-safe
On
TCS is normal
Off
In VDC fail-safe
On
VDC is normal
Off
BRC-81
E
BRC
ACTUATOR RLY (Note 2)
EBD FAIL SIG
A
Condition
G37 Coupe
L
M
N
O
P
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< ECU DIAGNOSIS > Data monitor Monitor item
CRANKING SIG
USV [FL-RR] (Note 2)
USV [FR-RL] (Note 2)
HSV [FL-RR] (Note 2)
HSV [FR-RL] (Note 2)
V/R OUTPUT (Note 2)
M/R OUTPUT
Display content
Condition
Crank operation
VDC switch-over valve
VDC switch-over valve
VDC switch-over valve
VDC switch-over valve
Solenoid valve relay activated
Actuator motor and motor relay activated
Reference value in normal operation
Crank is active
On
Crank is inactive
Off
When actuator (switch-over valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (when in failsafe mode)
On
When actuator (switch-over valve) is not active and actuator relay is active (ignition switch ON)
Off
When actuator (switch-over valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (when in failsafe mode)
On
When actuator (switch-over valve) is not active and actuator relay is active (ignition switch ON)
Off
When actuator (switch-over valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (when in failsafe mode)
On
When actuator (switch-over valve) is not active and actuator relay is active (ignition switch ON)
Off
When actuator (switch-over valve) is active (“ACTIVE TEST” with CONSULT-III) or actuator relay is inactive (when in failsafe mode)
On
When actuator (switch-over valve) is not active and actuator relay is active (ignition switch ON)
Off
When the solenoid valve relay is active (When ignition switch OFF)
On
When the solenoid valve relay is not active (in the fail-safe mode)
Off
When the actuator motor and motor relay are active (“ACTIVE TEST” with CONSULT-III)
On
When the actuator motor and motor relay are inactive
Off
NOTE: • 1: Confirm tire pressure is normal. • 2: A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an operation for checking. • 3: On and off timing for warning lamp and indicator lamp. - ABS warning lamp: Refer to BRC-75, "Description". - Brake warning lamp: Refer to BRC-76, "Description". - VDC OFF indicator lamp: Refer to BRC-77, "Description". - SLIP indicator lamp: Refer to BRC-78, "Description".
Revision: 2007 June
BRC-82
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< ECU DIAGNOSIS >
Wiring Diagram - BRAKE CONTROL SYSTEM -
INFOID:0000000001635145
A
B
C
D
E
BRC
G
H
I
J
K
L
M
N
O
P JCFWA0068GB
Revision: 2007 June
BRC-83
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< ECU DIAGNOSIS >
JCFWA0069GB
Revision: 2007 June
BRC-84
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< ECU DIAGNOSIS >
A
B
C
D
E
BRC
G
H
I
J
K
L
M
N
O JCFWA0070GB
P
Revision: 2007 June
BRC-85
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< ECU DIAGNOSIS >
JCFWA0071GB
Revision: 2007 June
BRC-86
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< ECU DIAGNOSIS >
A
B
C
D
E
BRC
G
H
I
J
K
L
M
N
O JCFWA0072GB
P
Fail-Safe
INFOID:0000000001635146
ABS, EBD SYSTEM In case of electrical malfunctions with the ABS, ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp will turn on. In case of electrical malfunctions with the EBD, brake warning lamp, ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp will turn on. Simultaneously, the VDC/TCS/ABS become one of the following conditions of the fail-safe function. Revision: 2007 June
BRC-87
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS] < ECU DIAGNOSIS > • For malfunction of ABS, only the EBD is activated and the condition of vehicle is the same condition of vehicles without TCS/ABS system. NOTE: ABS self-diagnosis sound may be heard. That is a normal condition because a self-diagnosis for “Ignition switch ON” and “The first starting” are being performed. • For malfunction of EBD, EBD and ABS become inoperative, and the condition of vehicle is the same as the condition of vehicles without TCS/ABS, EBD system.
VDC / TCS In case of malfunction in the VDC/TCS/ABS system, VDC OFF indicator lamp, SLIP indicator lamp are turned on, and the condition of vehicle is the same as the condition of vehicles without VDC/TCS control. CAUTION: If the Fail-Safe function is activated, then perform self-diagnosis for VDC/TCS/ABS control system.
DTC No. Index DTC
INFOID:0000000001635147
Items (CONSULT screen terms)
Reference
C1101
RR RH SENSOR-1
C1102
RR LH SENSOR-1
C1103
FR RH SENSOR-1
C1104
FR LH SENSOR-1
C1105
RR RH SENSOR-2
C1106
RR LH SENSOR-2
C1107
FR RH SENSOR-2
C1108
FR LH SENSOR-2
C1109
BATTERY VOLTAGE [ABNORMAL]
BRC-37, "DTC Logic"
C1110
CONTROLLER FAILURE
BRC-39, "DTC Logic"
C1111
PUMP MOTOR
BRC-40, "DTC Logic"
C1114
MAIN RELAY
BRC-42, "DTC Logic"
C1115
ABS SENSOR [ABNORMAL SIGNAL]
BRC-44, "DTC Logic"
C1116
STOP LAMP SW
BRC-47, "DTC Logic"
C1120
FR LH IN ABS SOL
BRC-49, "DTC Logic"
C1121
FR LH OUT ABS SOL
BRC-52, "DTC Logic"
C1122
FR RH IN ABS SOL
BRC-49, "DTC Logic"
C1123
FR RH OUT ABS SOL
BRC-52, "DTC Logic"
C1124
RR LH IN ABS SOL
BRC-49, "DTC Logic"
C1125
RR LH OUT ABS SOL
BRC-52, "DTC Logic"
C1126
RR RH IN ABS SOL
BRC-49, "DTC Logic"
C1127
RR RH OUT ABS SOL
BRC-52, "DTC Logic"
C1130
ENGINE SIGNAL 1
C1131
ENGINE SIGNAL 2
C1132
ENGINE SIGNAL 3
C1138
4WAS CIRCUIT
BRC-56, "DTC Logic"
C1142
PRESS SEN CIRCUIT
BRC-57, "DTC Logic"
C1143
ST ANG SEN CIRCUIT
C1144
ST ANG SEN SIGNAL
C1145
YAW RATE SENSOR
C1146
SIDE G-SEN CIRCUIT
Revision: 2007 June
BRC-88
BRC-31, "DTC Logic"
BRC-34, "DTC Logic"
BRC-55, "DTC Logic"
BRC-59, "DTC Logic"
BRC-61, "DTC Logic"
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< ECU DIAGNOSIS > DTC
Items (CONSULT screen terms)
C1147
USV LINE [FL-RR]
C1148
USV LINE [FR-RL]
C1149
HSV LINE [FL-RR]
Reference
A BRC-64, "DTC Logic"
B
C1150
HSV LINE [FR-RL]
C1153
EMERGENCY BRAKE
BRC-39, "DTC Logic"
C1155
BR FLUID LEVEL LOW
BRC-67, "DTC Logic"
C1170
VARIANT CORDING
BRC-39, "DTC Logic"
C1185
ACC CONT
BRC-69, "DTC Logic"
U1000
CAN COMM CIRCUIT
U1002
SYSTEM COMM
C
D
BRC-70, "DTC Logic"
E
BRC
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Revision: 2007 June
BRC-89
G37 Coupe
EXCESSIVE ABS FUNCTION OPERATION FREQUENCY [VDC/TCS/ABS]
< SYMPTOM DIAGNOSIS >
SYMPTOM DIAGNOSIS EXCESSIVE ABS FUNCTION OPERATION FREQUENCY Diagnosis Procedure
INFOID:0000000001635149
1.CHECK START Check front and rear brake force distribution using a brake tester. Refer to BR-63, "General Specifications". Is the inspection result normal? YES >> GO TO 2. NO >> Check brake system.
2.CHECK FRONT AND REAR AXLE Make sure that there is no excessive play in the front and rear axles. • Front: Refer to FAX-4, "Inspection". • Rear: Refer to RAX-5, "Inspection". Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace malfunctioning components.
3.CHECK WHEEL SENSOR AND SENSOR ROTOR Check the following. • Wheel sensor installation for damage. • Sensor rotor installation for damage. • Wheel sensor connector connection. • Wheel sensor harness inspection. Is the inspection result normal? YES >> GO TO 4. NO >> • Replace wheel sensor or sensor rotor. • Repair harness.
4.CHECK ABS WARNING LAMP DISPLAY Make sure that the ABS warning lamp is turned off after the ignition switch is turned ON or when driving. Is the ABS warning lamp illuminated? YES >> Perform self-diagnosis. Refer to BRC-26, "CONSULT-III Function". NO >> Normal
Revision: 2007 June
BRC-90
G37 Coupe
UNEXPECTED PEDAL REACTION [VDC/TCS/ABS]
< SYMPTOM DIAGNOSIS >
UNEXPECTED PEDAL REACTION Diagnosis Procedure
A INFOID:0000000001635150
1.CHECK BRAKE PEDAL STROKE
B
Check brake pedal stroke. Refer to BR-7, "Inspection and Adjustment". Is the stroke too large? YES >> • Bleed air from brake tube and hose. Refer to BR-12, "Bleeding Brake System". • Check brake pedal, brake booster, and master cylinder for mount play, looseness, brake system fluid leakage, etc. - Brake pedal: Refer to BR-7, "Inspection and Adjustment". - Brake master cylinder: Refer to BR-13, "Inspection". - Brake booster: Refer to BR-14, "Inspection". - Brake fluid: Refer to BR-11, "Inspection". NO >> GO TO 2.
C
D
E
2.CHECK FUNCTION Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. Check if braking force is BRC normal in this condition. Connect connector after inspection. Is the inspection result normal? G YES >> Normal NO >> Check brake system. H
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Revision: 2007 June
BRC-91
G37 Coupe
THE BRAKING DISTANCE IS LONG [VDC/TCS/ABS]
< SYMPTOM DIAGNOSIS >
THE BRAKING DISTANCE IS LONG Diagnosis Procedure
INFOID:0000000001635151
CAUTION: The stopping distance on slippery road surfaces might be longer when the ABS is operating than when the ABS is not operating.
1.CHECK FUNCTION Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. In this condition, check stopping distance. After inspection, connect connector. Is the inspection result normal? YES >> Normal NO >> Check brake system.
Revision: 2007 June
BRC-92
G37 Coupe
ABS FUNCTION DOES NOT OPERATE [VDC/TCS/ABS]
< SYMPTOM DIAGNOSIS >
ABS FUNCTION DOES NOT OPERATE Diagnosis Procedure
A INFOID:0000000001635152
CAUTION: ABS does not operate when speed is 10 km/h (6 MPH) or lower.
B
1.CHECK ABS WARNING LAMP DISPLAY C
Make sure that the ABS warning lamp turns OFF after ignition switch is turned ON or when driving. Is the inspection result normal? YES >> Normal NO >> Perform self-diagnosis.
D
E
BRC
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Revision: 2007 June
BRC-93
G37 Coupe
PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS [VDC/TCS/ABS]
< SYMPTOM DIAGNOSIS >
PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS Diagnosis Procedure
INFOID:0000000001635153
CAUTION: Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly depressed (just place a foot on it). However, this is normal. • When shifting gears • When driving on slippery road • During cornering at high speed • When passing over bumps or grooves [at approximately 50 mm (1.97 in) or more] • When pulling away just after starting engine [at approximately 10 km/h (6 MPH) or higher]
1.SYMPTOM CHECK 1 Check that there are pedal vibrations when the engine is started. Do vibrations occur? YES >> GO TO 2. NO >> Inspect the brake pedal.
2.SYMPTOM CHECK 2 Check that there are ABS operation noises when the engine is started. Do the operation noises occur? YES >> GO TO 3. NO >> Perform self -diagnosis.
3.SYMPTOM CHECK 3 Check symptoms when electrical component (headlamps, etc.) switches are operated. Do symptoms occur? YES >> Check if there is a radio, antenna, antenna lead wire, or wiring close to the control unit. If there is, move it farther away. NO >> Normal
Revision: 2007 June
BRC-94
G37 Coupe
VEHICLE JERKS DURING VDC/TCS/ABS CONTROL [VDC/TCS/ABS]
< SYMPTOM DIAGNOSIS >
VEHICLE JERKS DURING VDC/TCS/ABS CONTROL Diagnosis Procedure
A INFOID:0000000001635154
1.SYMPTOM CHECK
B
Check if the vehicle jerks during VDC/TCS/ABS control. Is the inspection result normal? YES >> Normal. NO >> GO TO 2.
C
2.CHECK SELF-DIAGNOSIS RESULTS
D
Perform self-diagnostic of ABS actuator and electric unit (control unit). Are self-diagnosis results indicated? YES >> Check corresponding items, make repairs, and perform ABS actuator and electric unit (control unit) self-diagnosis. NO >> GO TO 3.
3.CHECK CONNECTOR
E
BRC
1.
Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector and check terminal for deformation, disconnection, looseness, etc. 2. Securely connect connectors and perform ABS actuator and electric unit (control unit) self-diagnosis. Are self-diagnosis results indicated? YES >> If poor contact, damage, open or short circuit of connector terminal is found, repair or replace. NO >> GO TO 4.
G
H
4.CHECK ECM AND A/T SELF-DIAGNOSIS RESULTS Perform ECM self-diagnosis and A/T self-diagnosis. Are self-diagnosis results indicated? YES >> Check the corresponding items. NO >> Replace ABS actuator and electric unit (control unit).
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Revision: 2007 June
BRC-95
G37 Coupe
NORMAL OPERATING CONDITION [VDC/TCS/ABS]
< SYMPTOM DIAGNOSIS >
NORMAL OPERATING CONDITION Description
INFOID:0000000001635155
Symptom
Result
Slight vibrations are felt on the brake pedal and the operation noises occur, when VDC, TCS or ABS is activated. Stopping distance is longer than that of vehicles without ABS when the vehicle drives on rough, gravel, or snow-covered (fresh, deep snow) roads.
This is a normal condition due to the VDC, TCS or ABS activation.
The brake pedal moves and generates noises, when TCS or VDC is activated due to rapid acceleration or sharp turn. The brake pedal vibrates and motor operation noises occur from the engine room, after the engine starts and just after the vehicle starts. Depending on the road conditions, the driver may experience a sluggish feel. TCS may activate momentarily if wheel speed changes when driving over location where friction coefficient varies, when downshifting, or when fully depressing accelerator pedal. The ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp may turn ON when the vehicle is subject to strong shaking or large vibration, such as when the vehicle is rotating on a turntable or located on a ship while the engine is running. VDC may not operate normally or the ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp may illuminate, when running on a special road that is extremely slanted (e.g. bank in a circuit course). A malfunction may occur in the yaw rate/side G sensor system, when the vehicle turns sharply, such as during a spin turn, axle turn, or drift driving, while the VDC function is off (VDC OFF indicator lamp illuminated).
This is a normal, and it is caused by the ABS operation check. This is normal, because TCS places the highest priority on the optimum traction (stability). In this case, restart the engine on a normal road. If the normal condition is restored, there is no malfunction. At that time, erase the selfdiagnosis memory.
The vehicle speed will not increase even though the accelerator pedal is depressed, when inspecting the speedometer on a 2-wheel chassis dynamometer.
Normal (Deactivate the VDC/TCS function before performing an inspection on a chassis dynamometer.)
VDC OFF indicator lamp and SLIP indicator lamp may simultaneously turn on when low tire pressure warning lamp turns on.
This is not a VDC system error but results from characteristic change of tire.
Revision: 2007 June
BRC-96
G37 Coupe
PRECAUTIONS [VDC/TCS/ABS]
< PRECAUTION >
PRECAUTION
A
PRECAUTIONS Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
B
INFOID:0000000001830769
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along C with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front D air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the “SRS AIRBAG” and “SEAT BELT” of this Service Manual. WARNING: E • To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer. BRC • Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the “SRS AIRBAG”. • Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this G Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. H Precaution for Procedure without Cowl Top Cover INFOID:0000000001830772 When performing the procedure after removing cowl top cover, cover the lower end of windshield with urethane, etc.
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L
Precaution for Brake System
INFOID:0000000001635157
WARNING: Clean brake pads and shoes with a waste cloth, then wipe with a dust collector. • Only use DOT 3 brake fluid. Refer to MA-10, "Fluids and Lubricants". • Never reuse drained brake fluid. • Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it off immediately and wash with water if it gets on a painted surface. • Never use mineral oils such as gasoline or light oil. They may damage rubber parts and cause improper operation. • Always loosen the brake tube flare nut with a flare nut wrench.
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Revision: 2007 June
BRC-97
G37 Coupe
PRECAUTIONS < PRECAUTION > • Tighten the brake tube flare nut to the specified torque with a crowfoot (A) and torque wrench (B). • Always conform the specified tightening torque when installing the brake pipes. • Brake system is an important safety part. If a brake fluid leak is detected, always disassemble the affected part. If a malfunction is detected, replace part with a new one. • Turn the ignition switch OFF and disconnect the ABS actuator and electric unit (control unit) connector or the battery negative terminal before performing the work.
[VDC/TCS/ABS]
JPFIA0001ZZ
Precaution for Brake Control
INFOID:0000000001635158
• When starting engine or when starting vehicle just after starting engine, brake pedal may vibrate or motor operating noise may be heard from engine compartment. This is normal condition. • When an error is indicated by ABS or another warning lamp, collect all necessary information from customer (what symptoms are present under what conditions) and check for estimate causes before starting diagnostic servicing. Besides electrical system inspection, check brake booster operation, brake fluid level, and oil leaks. • If tire size and type are used in an improper combination, or brake pads are not Genuine NISSAN parts, stopping distance or steering stability may deteriorate. • ABS might be out of order or malfunctions by putting a radio (wiring inclusive), an antenna and a lead-in wire near the control unit. • If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness pinches, open circuits, and improper wiring. • VDC system may not operate normally or a VDC OFF indicator lamp or SLIP indicator lamp may light. - When replacing the following parts with parts other than genuine parts or making modifications: Suspension related parts (shock absorber, spring, bushing, etc.), tires, wheels (other than specified sizes), brake-related parts (pad, rotor, caliper, etc.), engine-related parts (muffler, ECM, etc.) and body reinforcement-related parts (roll bar, tower bar, etc.). - When driving with worn or deteriorated suspension, tires and brake-related parts.
Revision: 2007 June
BRC-98
G37 Coupe
PREPARATION [VDC/TCS/ABS]
< PREPARATION >
PREPARATION
A
PREPARATION Special Service Tool
INFOID:0000000001635159
B
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here. C
Tool number (Kent-Moore No.) Tool name
Description
D ST30720000 (J-25405) Drift a: 77 mm (3.03 in) dia. b: 55.5 mm (2.185 in) dia.
E
BRC
ZZA0701D
ST27863000 ( — ) Drift a: 74.5 mm (2.933 in) dia. b: 62.5 mm (2.461 in) dia.
G Installing rear sensor rotor
H ZZA0832D
I KV40104710 ( — ) a: 76.3 mm (3.004 in) dia. b: 67.9 mm (2.673 in) dia.
J
ZZA0832D
K
Commercial Service Tool
INFOID:0000000001635160
L Tool name
Description
M 1. Flare nut crowfoot a: 10 mm (0.39 in) /12 mm (0.47 in) 2. Torque wrench
Installing brake tube
N S-NT360
O
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Revision: 2007 June
BRC-99
G37 Coupe
WHEEL SENSOR [VDC/TCS/ABS]
< ON-VEHICLE REPAIR >
ON-VEHICLE REPAIR WHEEL SENSOR Exploded View
INFOID:0000000001635161
JSFIA0001GB
1.
Front LH wheel sensor
2.
Rear LH wheel sensor
A.
Front
B.
Rear
3.
Rear RH wheel sensor
: Vehicle front Refer to GI-4, "Components" for symbol marks in the figure.
NOTE: The above figure (front side) shows left side. Right side is the mirror image.
Removal and Installation
INFOID:0000000001635162
REMOVAL Pay attention to the following when removing sensor. CAUTION: • Do not twist sensor harness as much as possible, when removing it. Pull sensors out without pulling sensor harness. • Take care to avoid damaging sensor edges or rotor teeth. Remove wheel sensor first before removing front or rear wheel hub. This is to avoid damage to sensor wiring and loss of sensor function.
INSTALLATION Pay attention to the following when installing wheel sensor. Tighten installation bolts to the specified torques. • When installing, make sure there is no foreign material such as iron chips on and in the mounting hole of the wheel sensor. Make sure no foreign material has been caught in the sensor rotor. Remove any foreign material and clean the mount. • When installing wheel sensor, be sure to press rubber grommets in until they lock at locations shown above in the figure. When installed, harness must not be twisted.
Revision: 2007 June
BRC-100
G37 Coupe
SENSOR ROTOR [VDC/TCS/ABS]
< ON-VEHICLE REPAIR >
SENSOR ROTOR
A
FRONT SENSOR ROTOR FRONT SENSOR ROTOR : Exploded View
INFOID:0000000001635163
B
Refer to FAX-5, "Exploded View".
FRONT SENSOR ROTOR : Removal and Installation
INFOID:0000000001635164
C
REMOVAL Sensor rotor cannot be disassembled. Remove the sensor rotor together with hub bearing assembly. Refer to FAX-5, "Exploded View".
D
INSTALLATION Sensor rotor cannot be disassembled. Remove the sensor rotor together with hub bearing assembly. Refer to FAX-5, "Exploded View".
E
REAR SENSOR ROTOR REAR SENSOR ROTOR : Exploded View
INFOID:0000000001635165
BRC
G
H
I JSFIA0054JP
1.
Side flange
2.
J
Rear wheel sensor rotor
Refer to GI-4, "Components" for symbol marks in the figure.
REAR SENSOR ROTOR : Removal and Installation
K INFOID:0000000001635166
REMOVAL
L
• Follow the procedure below to remove rear sensor rotor. - Remove side flange. Refer to RAX-10, "Exploded View". - Using a bearing replacer (suitable tool) and puller (suitable tool), remove sensor rotor from side flange.
M
INSTALLATION CAUTION: Do not reuse sensor rotor. • Follow the procedure below to install rear sensor rotor. - Using a drifts, press rear sensor rotor onto side flange.
N
O
A: Drift [SST: ST30720000 (J-25405)] B: Drift [SST: ST27863000 ( — )] C: Drift [SST: KV40104710 ( — )]
P
- Install side flange. Refer to RAX-10, "Exploded View".
SFIA3387E
Revision: 2007 June
BRC-101
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) [VDC/TCS/ABS]
< ON-VEHICLE REPAIR >
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) Exploded View
INFOID:0000000001635167
JSFIA0007GB
1.
ABS actuator and electric unit (control 2. unit)
Connector
3.
4.
Bracket
A.
Left side of dash panel
B.
From master cylinder secondary side C.
From master cylinder primary side
D.
To front LH brake caliper
E.
To rear RH brake caliper
To Rear LH brake caliper
G.
To front RH brake caliper
F.
Bushing
: Vehicle front Refer to GI-4, "Components" for symbol marks in the figure.
Removal and Installation
INFOID:0000000001635168
REMOVAL CAUTION: • Before servicing, disconnect the battery cable from negative terminal. • To remove brake tube, use a flare nut wrench to prevent flare nuts and brake tube from being damaged. To install, use flare nut crowfoot and torque wrench. • Do not apply excessive impact to ABS actuator and electric unit (control unit), such as dropping it. • Do not remove and install actuator by holding harness. • After work is completed, bleed air from brake tube. Refer to BR-12, "Bleeding Brake System". 1. Remove cowl top cover. Refer to EXT-21, "Exploded View". 2. Disconnect ABS actuator and electric unit (control unit) connector. 3. Loosen brake tube flare nuts, then remove brake tubes from ABS actuator and electric unit (control unit). 4. Remove tire (front LH side). 5. Remove fender protector (rear): (front LH side). Refer to EXT-24, "FENDER PROTECTOR : Exploded View". 6. Remove ABS actuator and electric unit (control unit) bracket mounting nut. Revision: 2007 June
BRC-102
G37 Coupe
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) < ON-VEHICLE REPAIR > 7. Remove ABS actuator and electric unit (control unit) from vehicle.
[VDC/TCS/ABS] A
INSTALLATION Note the following, and install in the reverse order of removal. CAUTION: • Before servicing, disconnect the battery cable from negative terminal. • To remove brake tube, use a flare nut wrench to prevent flare nuts and brake tube from being damaged. To install, use flare nut crowfoot and torque wrench. • Do not apply excessive impact to ABS actuator and electric unit (control unit), such as dropping it. • Do not remove and install actuator by holding harness. • After work is completed, bleed air from brake tube. Refer to BR-12, "Bleeding Brake System". • After installing harness connector in the ABS actuator and electric unit (control unit), make sure connector is securely locked. • When replacing ABS actuator and electric unit (control unit), make sure to adjust neutral position of steering angle sensor. Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description".
B
C
D
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BRC
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Revision: 2007 June
BRC-103
G37 Coupe
YAW RATE/SIDE G SENSOR [VDC/TCS/ABS]
< ON-VEHICLE REPAIR >
YAW RATE/SIDE G SENSOR Exploded View
INFOID:0000000001635169
JSFIA0002GB
1.
Yaw rate/side G sensor : Vehicle front
Refer to GI-4, "Components" for symbol makes in the figure.
Removal and Installation
INFOID:0000000001635170
REMOVAL CAUTION: • Do not drop or strike yaw rate/side G sensor, or do not use power tool etc., because yaw rate/side G sensor is sensitive to the impact. 1. Remove center console. Refer to IP-23, "Exploded View". 2. Disconnect yaw rate/side G sensor harness connector. 3. Remove mounting bolts. Remove yaw rate/side G sensor.
INSTALLATION Note the following, and install in the reverse order of removal. CAUTION: • Do not drop or strike yaw rate/side G sensor, or do not use power tool etc., because yaw rate/side G sensor is sensitive to the impact.
Revision: 2007 June
BRC-104
G37 Coupe
STEERING ANGLE SENSOR [VDC/TCS/ABS]
< ON-VEHICLE REPAIR >
STEERING ANGLE SENSOR
A
Exploded View
INFOID:0000000001635171
B
C
D
JSFIA0003ZZ
1.
Steering angle sensor : Vehicle front
BRC
Removal and Installation
INFOID:0000000001635172
G
REMOVAL 1. 2.
E
Remove spiral cable assembly. Refer to SR-7, "Exploded View". Remove steering angle sensor from spiral cable assembly.
H
INSTALLATION Note the following, and install in the reverse order of removal. CAUTION: • After work, make sure to adjust neutral position of steering angle sensor. Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description". • Perform 4WAS front actuator adjustment. Refer to STC-27, "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Description".
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Revision: 2007 June
BRC-105
G37 Coupe
