Infiniti QX56 (Z62). Manual - part 151

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 electric 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

BRC-90

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1121, C1123, C1125, C1127 ABS OUT VALVE SYSTEM

C1121, C1123, C1125, C1127 ABS OUT VALVE SYSTEM

DTC Logic

INFOID: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 Procedure

INFOID: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 electric unit (control unit) harness connector and ground.

4.

Turn the ignition switch ON.

CAUTION:

Never start engine.

5.

Check voltage between ABS actuator and electric 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 circuit 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 detected 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

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 electric 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

BRC-92

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1130 ENGINE SIGNAL

C1130 ENGINE SIGNAL

DTC Logic

INFOID:0000000006222613

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 “C1130” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-92, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006222614

1.

CHECK ENGINE SYSTEM

With CONSULT-III.

Perform self-diagnosis for “ENGINE”.
Is any DTC detected?

YES

>> Check the DTC.

NO

>> GO TO 2.

2.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

With CONSULT-III.

1.

Erase Self-diagnosis result for “ABS”.

2.

Turn the ignition switch OFF.

3.

Start the engine and drive the vehicle for a short period of time.

4.

Check that the malfunction indicator lamp (MIL) turns OFF.

5.

After the vehicle stops, perform self-diagnosis for “ABS”.

Is DTC “C1130” detected?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-137, "Removal and Installa-

tion"

.

NO

>> Check pin terminals and connection of each harness connector for abnormal conditions. Repair or

replace error-detected parts.

DTC

Display Item

Malfunction detected condition

Possible causes

C1130

ENGINE SIGNAL 1

When a malfunction is detected in ECM system.

• ECM
• ABS actuator and electric unit 

(control unit)

• CAN communication line