BATTERY INFINITI QX56 2011 Factory Manual Online

C1120, C1122, C1124, C1126 ABS IN VALVE SYSTEM
BRC-89
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
YES >> Perform trouble diagnosis for battery power supply. Refer to PG-11, "Wiring Diagram - BATTERY
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
3.CHECK ABS IN VALVE GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Check continuity between ABS actuator and electr ic unit (control unit) harness connector and the ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK TERMINAL
Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness
connector.
Is the inspection result normal?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-137, "Removal and Installa-
tion".
NO >> Repair or replace error-detected parts.
ABS actuator and electric unit (control unit)
—Continuity
Connector Terminal
E36 2
Ground Existed
3
E37 48
Revision: 2010 May2011 QX56

BRC-90
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
C1121, C1123, C
1125, C1127 ABS OUT VALVE SYSTEM
C1121, C1123, C1125, C1127 ABS OUT VALVE SYSTEM
DTC LogicINFOID:0000000006222611
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK DTC DETECTION
With CONSULT-III
1. Turn the ignition switch OFF to ON.
2. Perform self-diagnosis for “ABS”.
Is DTC
“C1121”, “C1123”, “C1125” or “C1127” detected?
YES >> Proceed to diagnosis procedure. Refer to BRC-90, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222612
1.CHECK ABS OUT VALVE POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) harness connector.
3. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
4. Turn the ignition switch ON. CAUTION:
Never start engine.
5. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK ABS OUT VALVE POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check 30A fusible link (L).
3. Check continuity and short circui t between ABS actuator and electric unit (control unit) harness connector
terminal (1) and 30A fusible link (L).
Is the inspection result normal?
DTC Display Item Malfunction detected condition Possible causes
C1121 FR LH OUT ABS SOL When a malfunction is dete
cted in front LH ABS OUT
valve.
 Harness or connector
 ABS actuator and electric unit (control unit)
 Fusible link
 Battery power supply system
C1123 FR RH OUT ABS SOL
When a malfunction is detected in front RH ABS OUT
valve.
C1125 RR LH OUT ABS SOL When a malfunction is detected in rear LH ABS OUT
valve.
C1127 RR RH OUT ABS SOL When a malfunction is detected in rear RH ABS OUT
valve.
ABS actuator and electric
unit (control unit)
—Voltage
Connector Terminal
E36 1 Ground Battery voltage
ABS actuator and electric unit (control unit)
—Voltage
Connector Terminal
E36 1 Ground Battery voltage
Revision: 2010 May2011 QX56

C1121, C1123, C1125, C1127 ABS OUT VALVE SYSTEM
BRC-91
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
YES >> Perform trouble diagnosis for battery power supply. Refer to PG-11, "Wiring Diagram - BATTERY
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
3.CHECK ABS OUT VALVE GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Check continuity between ABS actuator and electr ic unit (control unit) harness connector and the ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK TERMINAL
Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness
connector.
Is the inspection result normal?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-137, "Removal and Installa-
tion".
NO >> Repair or replace error-detected parts.
ABS actuator and electric unit (control unit) —Continuity
Connector Terminal
E36 2
Ground Existed
3
E37 48
Revision: 2010 May2011 QX56

C1140 ACTUATOR RELAY SYSTEMBRC-93
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
C1140 ACTUATOR RELAY SYSTEM
DTC LogicINFOID:0000000006222615
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK DTC DETECTION
With CONSULT-III.
1. Turn the ignition switch OFF to ON.
2. Perform self-diagnosis for “ABS”.
Is DTC
“C1140” detected?
YES >> Proceed to diagnosis procedure. Refer to BRC-93, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222616
1.CHECK ACTUATOR RELAY POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) harness connector.
3. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
4. Turn the ignition switch ON. CAUTION:
Never start engine.
5. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK ACTUATOR RELAY POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check 30A fusible link (L).
3. Check continuity and short circuit between ABS act uator and electric unit (control unit) harness connector
terminal (1) and 30A fusible link (L).
Is the inspection result normal?
YES >> Perform trouble diagnosis for battery power supply. Refer to PG-11, "Wiring Diagram - BATTERY
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
3.CHECK ACTUATOR RELAY GROUND CIRCUIT
DTC Display Item Malfunction detected condition Possible causes
C1140 ACTUATOR RLY When a malfunction is detected in actuator relay.  Harness or connector
 ABS actuator and electric unit
(control unit)
Fusible link
 Battery power supply system
ABS actuator and electric unit (control unit) —Voltage
Connector Terminal
E36 1 Ground Battery voltage
ABS actuator and electric unit (control unit)
—Voltage
Connector Terminal
E36 1 Ground Battery voltage
Revision: 2010 May2011 QX56

C1143 STEERING ANGLE SENSORBRC-97
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
C1143 STEERING ANGLE SENSOR
DTC LogicINFOID:0000000006222619
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK DTC DETECTION
With CONSULT-III.
1. Turn the ignition switch OFF to ON.
2. Perform self-diagnosis for “ABS”.
Is DTC
“C1143” detected?
YES >> Proceed to diagnosis procedure. Refer to BRC-97, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222620
1.CHECK STEERING ANGLE SE NSOR MOUNTING CONDITION
Check steering angle sensor mounting condition. Refer to SR-14, "
Exploded View".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace error-detected parts.
2.CHECK STEERING ANGLE SENSOR POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect steering angle sensor harness connector.
3. Check voltage between steering angle sensor harness connector and ground.
4. Turn the ignition switch ON. CAUTION:
Never start engine.
5. Check voltage between steering angle sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK STEERING ANGLE SENSOR POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check 10A fuse (#7).
DTC Display Item Malfunction detected condition Possible causes
C1143 ST ANG SEN CIRCUIT When a malfunction is detected in steering angle sen-
sor.  Harness or connector
 Steering angle sensor
 ABS actuator and electric unit
(control unit)
Fuse
 Ignition power supply system
 CAN communication line
Steering angle sensor — Voltage
Connector Terminal
M30 4 Ground Approx. 0 V
Steering angle sensor — Voltage
Connector Terminal
M30 4 Ground Battery voltage
Revision: 2010 May2011 QX56

C1145, C1146 YAW RATE/SIDE/DECEL G SENSOR
BRC-101
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK YAW RATE/SIDE/DECEL G SENSOR POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check 10A fuse (#57).
3. Disconnect IPDM E/R harness connector.
4. Check continuity between yaw rate/side/decel G sensor harness connector and IPDM E/R harness con-
nector.
5. Check continuity between yaw rate/side/decel G sensor harness connector and ground.
Is the inspection result normal?
YES >> Perform trouble diagnosis for ignition power supply. Refer to PG-89, "Wiring Diagram - IGNITION
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
4.CHECK YAW RATE/SIDE/DECEL G SENSOR GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Check continuity between yaw rate/side/decel G sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace error-detected parts.
5.CHECK COMMUNICATION LINE (1)
1. Disconnect ABS actuator and electric unit (control unit) harness connector.
2. Check continuity between yaw rate/side/decel G sensor harness connector and ABS actuator and electric
unit (control unit) harness connector.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace error-detected parts.
Yaw rate/side/decel G sensor —Voltage
Connector Terminal
M55 3 Ground Battery voltage
Yaw rate/side/decel G sensor IPDM E/R Continuity
Connector Terminal Connector Terminal
M55 3 E15 59 Existed
Yaw rate/side/decel G sensor —Continuity
Connector Terminal
M55 3 Ground Not existed
Yaw rate/side/decel G sensor —Continuity
Connector Terminal
M55 6 Ground Existed
Yaw rate/side/decel G sens or ABS actuator and electric unit (control unit)
Continuity
Connector Terminal Connector Terminal
M55 4
E36 9
Existed
510
Revision: 2010 May2011 QX56

BRC-106
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
C1164, C1165 CV SYSTEM
C1164, C1165 CV SYSTEM
DTC LogicINFOID:0000000006222630
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK DTC DETECTION
With CONSULT-III.
1. Turn the ignition switch OFF to ON.
2. Perform self-diagnosis for “ABS”.
Is DTC
“C1164” or “C1165” detected?
YES >> Proceed to diagnosis procedure. Refer to BRC-106, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222631
1.CHECK CUT VALVE POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) harness connector.
3. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
4. Turn the ignition switch ON. CAUTION:
Never start engine.
5. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK CUT VALVE POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check 30A fusible link (L).
3. Check continuity and short circui t between ABS actuator and electric unit (control unit) harness connector
terminal (1) and 30A fusible link (L).
Is the inspection result normal?
YES >> Perform trouble diagnosis for battery power supply. Refer to PG-11, "Wiring Diagram - BATTERY
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
3.CHECK CUT VALVE GROUND CIRCUIT
DTC Display Item Malfunction detected condition Possible causes
C1164 CV 1 When a malfunction is detected in cut valve 1.  Harness or connector  ABS actuator and electric unit
(control unit)
 Fusible link
 Battery power supply system
C1165 CV 2 When a malfunction is detected in cut valve 2.
ABS actuator and electric
unit (control unit)
—Voltage
Connector Terminal
E36 1 Ground Battery voltage
ABS actuator and electric unit (control unit) —Voltage
Connector Terminal
E36 1 Ground Battery voltage
Revision: 2010 May2011 QX56

BRC-108
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
C1166, C1167 SV SYSTEM
C1166, C1167 SV SYSTEM
DTC LogicINFOID:0000000006222632
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK DTC DETECTION
With CONSULT-III.
1. Turn the ignition switch OFF to ON.
2. Perform self-diagnosis for “ABS”.
Is DTC
“C1166” or “C1167” detected?
YES >> Proceed to diagnosis procedure. Refer to BRC-108, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222633
1.CHECK SUCTION VALVE POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) harness connector.
3. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
4. Turn the ignition switch ON. CAUTION:
Never start engine.
5. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK SUCTION VALVE POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check 30A fusible link (L).
3. Check continuity and short circui t between ABS actuator and electric unit (control unit) harness connector
terminal (1) and 30A fusible link (L).
Is the inspection result normal?
YES >> Perform trouble diagnosis for battery power supply. Refer to PG-11, "Wiring Diagram - BATTERY
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
3.CHECK SUCTION VALVE GROUND CIRCUIT
DTC Display Item Malfunction detected condition Possible causes
C1166 SV 1 When a malfunction is detected in suction valve 1.  Harness or connector  ABS actuator and electric unit
(control unit)
 Fusible link
 Battery power supply system
C1167 SV 2 When a malfunction is detected in suction valve 2.
ABS actuator and electric
unit (control unit)
—Voltage
Connector Terminal
E36 1 Ground Battery voltage
ABS actuator and electric unit (control unit)
—Voltage
Connector Terminal
E36 1 Ground Battery voltage
Revision: 2010 May2011 QX56

BRC-114
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
POWER SUPPLY AND GROUND CIRCUIT
2. Turn the ignition switch ON
CAUTION:
Never start engine.
3. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CON TROL UNIT) IGNITION POWER SUPPLY CIRCUIT
(2)
1. Turn the ignition switch OFF.
2. Check 10A fuse (#74).
3. Check continuity and short circui t between ABS actuator and electric unit (control unit) harness connector
terminal (49) and 10A fuse (#74).
Is the inspection result normal?
YES >> Perform trouble diagnosis for ignition power supply. Refer to PG-89, "Wiring Diagram - IGNITION
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
5.CHECK MOTOR AND MOTOR RE LAY POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
3. Turn the ignition switch ON. CAUTION:
Never start engine.
4. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 6.
6.CHECK MOTOR AND MOTOR RE LAY POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check 50A fusible link (M).
3. Check continuity and short circui t between ABS actuator and electric unit (control unit) harness connector
terminal (4 and 47) and 50A fusible link (M).
ABS actuator and electric unit (control unit) —Voltage
Connector Terminal
E37 49 Ground Approx. 0 V
ABS actuator and electric unit (control unit) —Voltage
Connector Terminal
E37 49 Ground 10 − 16 V
ABS actuator and electric unit (control unit)
—Voltage
Connector Terminal
E36 4 Ground Battery voltage
E37 47
ABS actuator and electric unit (control unit)
—Voltage
Connector Terminal
E36 4 Ground Battery voltage
E37 47
Revision: 2010 May2011 QX56

POWER SUPPLY AND GROUND CIRCUITBRC-115
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
Is the inspection result normal?
YES >> Perform trouble diagnosis for battery power supply. Refer to PG-11, "Wiring Diagram - BATTERY
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
7.CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE, ANS CUT VALVE, SUCTION VALVE POW-
ER SUPPLY
1. Turn the ignition switch OFF.
2. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
3. Turn the ignition switch ON CAUTION:
Never start engine.
4. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 8.
8.CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE, ANS CUT VALVE, SUCTION VALVE POW-
ER SUPPLY CIRCUIT 1. Turn the ignition switch OFF.
2. Check 30A fusible link (L).
3. Check continuity and short circuit between ABS act uator and electric unit (control unit) harness connector
terminal (1) and 30A fusible link (L).
Is the inspection result normal?
YES >> Perform trouble diagnosis for battery power supply. Refer to PG-11, "Wiring Diagram - BATTERY
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
9.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check for continuity between ABS actuator and elec tric unit (control unit) harness connector and the ground.
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair or replace error-detected parts.
10.CHECK TERMINAL
 Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with har-
ness connector.
 Check IPDM E/R pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES >> INSPECTION END
ABS actuator and electric unit (control unit)
—Voltage
Connector Terminal
E36 1 Ground Battery voltage
ABS actuator and electric unit (control unit)
—Voltage
Connector Terminal
E36 1 Ground Battery voltage
ABS actuator and electric unit (control unit) —Continuity
Connector Terminal
E36 2
Ground Existed
3
E37 48
Revision: 2010 May2011 QX56