INFINITI QX56 2008 Factory Service Manual

BRC-14
< FUNCTION DIAGNOSIS >[VDC/TCS/ABS]
VDC
Component Description
INFOID:0000000001686242
10. Yaw rate/side/decel G sensor M108 11. Rear wheel sensor LH C11 Rear wheel sensor RH C10 12. Steering angle sensor M17
13. VDC OFF switch M253 14. Stop lamp relay E12
Component parts Reference
ABS actuator and electric unit (control unit) Pump
BRC-38, "
Description"Motor
Actuator relayBRC-56, "
Description"
Solenoid valveBRC-48, "Description"
VDC switch-over valve
(CV1, CV2, SV1, SV2)BRC-70, "Description"
Wheel sensor
BRC-29, "Description"
Yaw rate/side/decel G sensorBRC-40, "Description"
Steering angle sensorBRC-61, "Description"
VDC OFF switchBRC-81, "Description"
ABS warning lampBRC-83, "Description"
Brake warning lampBRC-84, "Description"
VDC OFF indicator lampBRC-85, "Description"
SLIP indicator lampBRC-86, "Description"
Front pressure sensor
BRC-58, "Description"Rear pressure sensor
Active boosterBRC-73, "
Description"
Delta stroke sensorBRC-76, "Description"
Revision: March 2010 2008 QX56

TCS
BRC-15
< FUNCTION DIAGNOSIS > [VDC/TCS/ABS]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
TCS
System DiagramINFOID:0000000001691092
System DescriptionINFOID:0000000001686244
• 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 wheel s. At this time, LH and RH rear brake fluid pres-
sure 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 inform s driver of system operation by flashing SLIP indicator lamp.
• Electrical system diagnosis by CONSULT-III is available.
AWFIA0065GB
Revision: March 2010 2008 QX56

BRC-16
< FUNCTION DIAGNOSIS >[VDC/TCS/ABS]
TCS
Component Parts Location
INFOID:0000000001691093
1. Front wheel sensor LH E18 Front wheel sensor RH E117 2. Delta stroke sensor E114
3. Brake fluid level switch E21
4. Active booster E49 5. Front pressure sensor E316. Rear pressure sensor E32
7. ABS actuator and el ectric unit (con-
trol unit) E125 8. Stop lamp switch E38
9. Combination meter M23, M24
AWFIA0713GB
Revision: March 2010 2008 QX56

TCS
BRC-17
< FUNCTION DIAGNOSIS > [VDC/TCS/ABS]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
Component DescriptionINFOID:0000000001691094
10. Yaw rate/side/decel G sensor M108 11. Rear wheel sensor LH C11 Rear wheel sensor RH C1012. Steering angle sensor M17
13. VDC OFF switch M253 14. Stop lamp relay E12
Component parts Reference
ABS actuator and electric unit (control unit)Pump
BRC-38, "
Description"Motor
Actuator relayBRC-56, "
Description"
Solenoid valveBRC-48, "Description"
VDC switch-over valve
(CV1, CV2, SV1, SV2)BRC-70, "Description"
Wheel sensor
BRC-29, "Description"
Yaw rate/side/decel G sensorBRC-40, "Description"
Steering angle sensorBRC-61, "Description"
VDC OFF switchBRC-81, "Description"
ABS warning lampBRC-83, "Description"
Brake warning lampBRC-84, "Description"
VDC OFF indicator lampBRC-85, "Description"
SLIP indicator lampBRC-86, "Description"
Front pressure sensor
BRC-58, "Description"Rear pressure sensor
Active boosterBRC-73, "
Description"
Delta stroke sensorBRC-76, "Description"
Revision: March 2010 2008 QX56

BRC-18
< FUNCTION DIAGNOSIS >[VDC/TCS/ABS]
ABS
ABS
System DiagramINFOID:0000000001686247
System DescriptionINFOID:0000000001686248
• Anti-Lock Braking System is a function that detects
wheel revolution while braking, electronically controls
braking force, and prevents wheel locking during s udden braking. It improves handling stability and maneu-
verability for avoiding obstacles.
• Electrical system diagnosis by CONSULT-III is available.
AWFIA0014GB
Revision: March 2010 2008 QX56

ABS
BRC-19
< FUNCTION DIAGNOSIS > [VDC/TCS/ABS]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
Component Parts LocationINFOID:0000000001691095
1. Front wheel sensor LH E18 Front wheel sensor RH E117 2. Delta stroke sensor E114 3. Brake fluid level switch E21
4. Active booster E49 5. Front pressure sensor E31 6. Rear pressure sensor E32
7. ABS actuator and electric unit (con- trol unit) E125 8. Stop lamp switch E38
9. Combination meter M23, M24
AWFIA0713GB
Revision: March 2010 2008 QX56

BRC-20
< FUNCTION DIAGNOSIS >[VDC/TCS/ABS]
ABS
Component Description
INFOID:0000000001686250
10. Yaw rate/side/decel G sensor M108 11. Rear wheel sensor LH C11 Rear wheel sensor RH C10 12. Steering angle sensor M17
13. VDC OFF switch M253 14. Stop lamp relay E12
Component parts Reference
ABS actuator and electric unit (control unit) Pump
BRC-38, "
Description"Motor
Actuator relayBRC-56, "
Description"
Solenoid valveBRC-48, "Description"
Wheel sensor BRC-29, "Description"
ABS warning lampBRC-83, "Description"
Brake warning lampBRC-84, "Description"
Revision: March 2010 2008 QX56

EBD
BRC-21
< FUNCTION DIAGNOSIS > [VDC/TCS/ABS]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
EBD
System DiagramINFOID:0000000001691096
System DescriptionINFOID:0000000001686252
• Electric Brake force Distribution is a following functi on. ABS actuator and electric unit (control unit) detects
subtle slippages between the front and rear wheels during braking. Then it electronically controls the rear
braking force (brake fluid pressure) to reduce rear wheel slippage. Accordingly, it improves vehicle stability.
• Electrical system diagnosis by CONSULT-III is available.
AWFIA0014GB
Revision: March 2010 2008 QX56

BRC-22
< FUNCTION DIAGNOSIS >[VDC/TCS/ABS]
EBD
Component Parts Location
INFOID:0000000001691097
1. Front wheel sensor LH E18 Front wheel sensor RH E117 2. Delta stroke sensor E114
3. Brake fluid level switch E21
4. Active booster E49 5. Front pressure sensor E316. Rear pressure sensor E32
7. ABS actuator and el ectric unit (con-
trol unit) E125 8. Stop lamp switch E38
9. Combination meter M23, M24
AWFIA0713GB
Revision: March 2010 2008 QX56

EBD
BRC-23
< FUNCTION DIAGNOSIS > [VDC/TCS/ABS]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
Component DescriptionINFOID:0000000001691098
10. Yaw rate/side/decel G sensor M108 11. Rear wheel sensor LH C11 Rear wheel sensor RH C1012. Steering angle sensor M17
13. VDC OFF switch M253 14. Stop lamp relay E12
Component parts Reference
ABS actuator and electric unit (control unit)Pump
BRC-38, "
Description"Motor
Actuator relayBRC-56, "
Description"
Solenoid valveBRC-48, "Description"
Wheel sensor BRC-29, "Description"
ABS warning lampBRC-83, "Description"
Brake warning lampBRC-84, "Description"
Revision: March 2010 2008 QX56