Infiniti QX56 (Z62). Manual - part 150

 

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Infiniti QX56 (Z62). Manual - part 150

 

 

C1116 STOP LAMP SWITCH

BRC-85

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

NO

>> Repair or replace error-detected parts.

20.

CHECK STOP LAMP RELAY POWER SUPPLY (4)

1.

Check voltage between stop lamp relay harness connector and ground.

2.

Turn the ignition switch ON.

CAUTION:

Never start engine.

3.

Check voltage between stop lamp relay harness connector and ground.

Is the inspection result normal?

YES

>> Check pin terminals and connection of stop lamp relay harness connector for abnormal condi-

tions. Repair or replace error-detected parts.

NO

>> GO TO 21.

21.

CHECK STOP LAMP RELAY CIRCUIT (4)

1.

Check 10A fuse (#7).

2.

Disconnect fuse block (J/B) harness connector.

3.

Check fuse block (J/B) pin terminals for damage or loose connection with harness connector.

4.

Check continuity between stop lamp relay harness connector and fuse block (J/B).

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.

22.

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.

Component Inspection (Stop lamp Switch)

INFOID:0000000006222605

1.

CHECK STOP LAMP SWITCH

1.

Turn the ignition switch OFF.

2.

Disconnect stop lamp switch harness connector.

3.

Check continuity when stop lamp switch is operated.

Stop lamp relay

Voltage

Connector

Terminal

E58

3

Ground

Battery voltage

Stop lamp relay

Voltage

Connector

Terminal

E58

3

Ground

Battery voltage

Stop lamp relay

Fuse block (J/B)

Continuity

Connector

Terminal

Connector

Terminal

E58

3

E103

8F

Existed

BRC-86

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1116 STOP LAMP SWITCH

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace stop lamp switch. Refer to 

BR-20, "Removal and Installation"

.

Component Inspection (Stop Lamp Relay)

INFOID:0000000006222606

1.

CHECK STOP LAMP RELAY

1.

Apply 12 V to stop lamp relay connector terminal (1 and 2).

CAUTION:

• Never make the terminals short.
• Connect the fuse between the terminals when applying the voltage.

2.

Check continuity between stop lamp relay connector terminals.

3.

Check resistance between stop lamp relay connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace stop lamp relay.

Stop lamp switch

Condition

Continuity

Terminal

 2

 4

When stop lamp switch is released
(When brake pedal is depressed)

Existed

When stop lamp switch is pressed
(When brake pedal is released)

Not existed

Stop lamp relay

Condition

Continuity

Terminal

 5

Apply 12 V to stop lamp relay connector 
terminal (1 and 2)

Existed

Do not apply 12 V to stop lamp relay con-
nector terminal (1 and 2)

Not existed

Stop lamp relay

Resistance 

Terminal

 

2

Approx.  50 

C1118 TRANSFER CONTROL UNIT

BRC-87

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

C1118 TRANSFER CONTROL UNIT

DTC Logic

INFOID:0000000006222607

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 “C1118” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-87, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006222608

1.

CHECK TRANSFER CONTROL UNIT SYSTEM

With CONSULT-III.

Perform self-diagnosis for “ALL MODE AWD/4WD”.
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 4WD warning lamp turns OFF.

5.

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

Is DTC “C1118” 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

C1118

4WD SYSTEM

When a malfunction is detected in transfer control unit 
system.

• Transfer control unit
• ABS actuator and electric unit 

(control unit)

• CAN communication line

BRC-88

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1120, C1122, C1124, C1126 ABS IN VALVE SYSTEM

C1120, C1122, C1124, C1126 ABS IN VALVE SYSTEM

DTC Logic

INFOID:0000000006222609

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 “C1120”, “C1122”, “C1124” or “C1126” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-88, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006222610

1.

CHECK ABS IN 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 IN 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

C1120

FR LH IN ABS SOL

When a malfunction is detected in front LH ABS IN 
valve.

• Harness or connector
• ABS actuator and electric unit 

(control unit)

• Fusible link
• Battery power supply system

C1122

FR RH IN ABS SOL

When a malfunction is detected in front RH ABS IN 
valve.

C1124

RR LH IN ABS SOL

When a malfunction is detected in rear LH ABS IN 
valve.

C1126

RR RH IN ABS SOL

When a malfunction is detected in rear RH ABS IN 
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

 

 

 

 

 

 

 

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