Infiniti QX56 (Z62). Manual - part 148

C1115 WHEEL SENSOR

BRC-77

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

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BRC

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C1115 WHEEL SENSOR

DTC Logic

INFOID:0000000006222601

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC DETECTION

With CONSULT-III.

1.

Start engine and drive vehicle at approx. 30 km/h (19 MPH) or more for approx. 1 minute.

2.

Perform self-diagnosis for “ABS”.

Is DTC “C1115” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-77, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006222602

CAUTION:

For wheel sensor, never check between terminals.

1.

CHECK TIRE

1.

Turn the ignition switch OFF.

2.

Check tire air pressure, wear and size. Refer to 

WT-69, "Tire Air Pressure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Adjust air pressure. Or replace tire. Refer to 

WT-69, "Tire Air Pressure"

.

2.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY SYSTEM

Check ABS actuator and electric unit (control unit) power supply system. Refer to 

BRC-113, "Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK WHEEL SENSOR HARNESS

1.

Disconnect ABS actuator and electric unit (control unit) harness connector.

2.

Disconnect wheel sensor harness connector.

3.

Check continuity between ABS actuator and electric unit (control unit) harness connector and wheel sen-
sor harness connector. (Check continuity when steering wheel is steered to RH and LH, or center harness
in wheel housing is moved.)

Measurement connector and terminal for power supply circuit

DTC

Display Item

Malfunction detected condition

Possible causes

C1115

ABS SENSOR
[ABNORMAL SIGNAL]

When difference in wheel speed between any wheel 
and others is detected during the vehicle is driven, 
because of installation of other tires than specified.

• Harness or connector
• Wheel sensor
• Sensor rotor
• ABS actuator and electric unit 

(control unit)

ABS actuator and electric unit (control unit)

Wheel sensor

Continuity

Connector

Terminal

Connector

Terminal

E36

20

E22 (Front LH wheel)

1

Existed

33

E39 (Front RH wheel)

22

C10 (Rear LH wheel)

35

C11 (Rear RH wheel)

BRC-78

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1115 WHEEL SENSOR

Measurement connector and terminal for signal circuit

4.

Check continuity between ABS actuator and electric unit (control unit) harness connector and the ground.

Measurement connector and terminal for ground circuit

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK WHEEL SENSOR

Check wheel sensor for damage, disconnection or looseness.
• Front wheel sensor: Refer to 

BRC-134, "FRONT WHEEL SENSOR : Exploded View"

.

• Rear wheel sensor: Refer to 

BRC-135, "REAR WHEEL SENSOR : Exploded View"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>>

Replace wheel sensor.

• Front wheel sensor: Refer to 

BRC-134, "FRONT WHEEL SENSOR : Removal and Installation"

.

• Rear wheel sensor: Refer to 

BRC-135, "REAR WHEEL SENSOR : Removal and Installation"

.

5.

CHECK TERMINAL

• Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with har-

ness connector.

• Check each wheel sensor pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

6.

REPLACE WHEEL SENSOR

With CONSULT-III.

1.

Connect ABS actuator and electric unit (control unit) harness connector.

2.

Replace wheel sensor. Refer to 

BRC-134, "FRONT WHEEL SENSOR : Removal and Installation"

 (front),

BRC-135, "REAR WHEEL SENSOR : Removal and Installation"

 (rear).

3.

Erase Self-diagnosis result for “ABS”.

4.

Start the engine. Drive the vehicle at vehicle speed of approx. 30 km/h for approx. 1 minute.

5.

Perform self-diagnosis for “ABS”.

DTC Is DTC “C1115” detected?

YES

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

BRC-137, "Removal and Installa-

tion"

.

NO

>> INSPECTION END

ABS actuator and electric unit (control unit)

Wheel sensor

Continuity

Connector

Terminal

Connector

Terminal

E36

34

E22 (Front LH wheel)

2

Existed

19

E39 (Front RH wheel)

36

C10 (Rear LH wheel)

21

C11 (Rear RH wheel)

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

E36

20, 34

Ground

Not existed

33, 19

22, 36

35, 21

C1116 STOP LAMP SWITCH

BRC-79

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

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C1116 STOP LAMP SWITCH

DTC Logic

INFOID:0000000006222603

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 “C1116” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-79, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006222604

1.

CHECK STOP LAMP FOR ILLUMINATION

Depress brake pedal and check that stop lamp turns ON.

Does stop lamp turn ON?

YES

>> GO TO 2.

NO

>> Check stop lamp system. Refer to 

EXL-40, "Wiring Diagram"

.

2.

CHECK STOP LAMP SWITCH CLEARANCE

1.

Turn the ignition switch OFF.

2.

Check stop lamp clearance. Refer to 

BR-7, "Inspection and Adjustment"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Adjust stop lamp switch clearance. Refer to 

BR-7, "Inspection and Adjustment"

.

3.

CHECK STOP LAMP SWITCH POWER SUPPLY (1)

1.

Disconnect ABS actuator and electric unit (control unit) harness connector.

2.

Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.

3.

Turn the ignition switch ON.

CAUTION:

Never start engine.

4.

Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.

DTC

Display Item

Malfunction detected condition

Possible causes

C1116

STOP LAMP SW

• When stop lamp switch signal is not input when brake 

pedal depress.

• When stop lamp switch signal is not input when stop 

lamp relay operates.

• Harness or connector
• Stop lamp switch
• Stop lamp relay
• ABS actuator and electric unit 

(control unit)

• Battery power supply system

ABS actuator and electric unit (control unit)

—

Condition

Voltage

Connector

Terminal

E36

17

Ground

Brake pedal depressed

Approx. 0 V

Brake pedal not depressed

BRC-80

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1116 STOP LAMP SWITCH

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 4.

4.

CHECK STOP LAMP SWITCH CIRCUIT (1)

1.

Turn the ignition switch OFF.

2.

Disconnect stop lamp switch harness connector.

3.

Check continuity between ABS actuator and electric unit (control unit) harness connector and stop lamp
switch harness connector.

4.

Check continuity between ABS actuator and electric unit (control unit) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK STOP LAMP SWITCH

Check stop lamp switch. Refer to 

BRC-85, "Component Inspection (Stop lamp Switch)"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace stop lamp switch. Refer to 

BR-20, "Removal and Installation"

.

6.

CHECK STOP LAMP SWITCH POWER SUPPLY (2)

1.

Check voltage between stop lamp switch harness connector and ground.

2.

Turn the ignition switch ON.

CAUTION:

Never start engine.

3.

Check voltage between stop lamp switch harness connector and ground.

Is the inspection result normal?

YES

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

tions. Repair or replace error-detected parts.

NO

>> GO TO 7.

ABS actuator and electric unit (control unit)

—

Condition

Voltage

Connector

Terminal

E36

17

Ground

Brake pedal depressed

Battery voltage

Brake pedal not depressed

Approx. 0 V

ABS actuator and electric unit (control unit)

Stop lamp switch

Continuity

Connector

Terminal

Connector

Terminal

E36

17

E115

4

Existed

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

E36

17

Ground

Not existed

Stop lamp switch

—

Voltage

Connector

Terminal

E115

3

Ground

Approx. 0 V

Stop lamp switch

—

Voltage

Connector

Terminal

E115

3

Ground

Battery voltage