Nissan Murano Z51. Manual - part 309

C1140 ACTUATOR RELAY SYSTEM

BRC-59

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

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M

A

B

BRC

N

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Component Inspection

INFOID:0000000005517326

1.

CHECK ACTIVE TEST

1.

Select “ABS”, “ACTIVE TEST” and “ABS MOTOR” in order with CONSULT-III.

2.

Select “On” and “Off” on screen. Make sure motor relay and actuator relay operates as shown in table
below.

NOTE:

A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is a
operation for checking.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to diagnosis procedure. Refer to 

BRC-58, "Diagnosis Procedure"

.

Special Repair Requirement

INFOID:0000000005532219

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION AND CALIBRATION OF DECEL G

SENSOR

After removing/replacing an ABS actuator and electric unit (control unit), be sure to perform the following pro-
cedure.
• Adjustment of steering angle sensor neutral position: Refer to 

BRC-9, "ADJUSTMENT OF STEERING

ANGLE SENSOR NEUTRAL POSITION : Description"

.

• Calibration of decel G sensor: Refer to 

BRC-10, "CALIBRATION OF DECEL G SENSOR : Description"

.

>> END

Test item

Display item

Display

On

Off

ABS MOTOR

MOTOR RELAY

On

Off

ACTUATOR RLY

On

On

BRC-60

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C1142 PRESS SENSOR

C1142 PRESS SENSOR

Description

INFOID:0000000005517328

The pressure sensor converts the brake fluid pressure to an electric signal and transmits it to the ABS actuator
and electric unit (control unit). [The pressure sensor is integrated in the ABS actuator and electric unit (control
unit).]

DTC Logic

INFOID:0000000005517329

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

1.

Turn the ignition switch ON.

2.

Perform self-diagnosis for “ABS” with CONSULT-III.

Is DTC “C1142” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-60, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005517330

1.

CHECK STOP LAMP SWITCH

Check stop lamp switch system. Refer to 

BRC-50, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK DATA MONITOR

Check pressure sensor signal. Refer to 

BRC-60, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>>

Check brake pedal, brake booster and master cylinder for mount play, looseness, brake system
fluid leakage, etc.

• Brake fluid leakage: Refer to 

BR-12, "Inspection"

.

• Brake pedal: Refer to 

BR-21, "Inspection and Adjustment"

.

• Master cylinder: Refer to 

BR-29, "Inspection"

.

• Brake booster: Refer to 

BR-31, "Inspection and Adjustment"

.

3.

PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS

Perform self-diagnosis for “ABS” with CONSULT-III.

Is any item indicated on the self-diagnosis display?

YES

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

BRC-113, "Exploded View"

.

NO

>> Repair or replace error-detected parts.

Component Inspection

INFOID:0000000005517331

1.

CHECK DATA MONITOR

Select “ABS”, “DATA MONITOR” and “PRESS SENSOR” in order with CONSULT-III, and check the brake fluid
pressure.

DTC

Display item

Malfunction detected condition

Possible cause

C1142

PRESS SEN CIRCUIT

Pressure sensor signal line is open or shorted, or pres-
sure sensor is malfunctioning.

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

(control unit)

C1142 PRESS SENSOR

BRC-61

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C

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G

H

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A

B

BRC

N

O

P

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to diagnosis procedure. Refer to 

BRC-60, "Diagnosis Procedure"

.

Special Repair Requirement

INFOID:0000000005532220

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION AND CALIBRATION OF DECEL G

SENSOR

After removing/replacing an ABS actuator and electric unit (control unit), be sure to perform the following pro-
cedure.
• Adjustment of steering angle sensor neutral position: Refer to 

BRC-9, "ADJUSTMENT OF STEERING

ANGLE SENSOR NEUTRAL POSITION : Description"

.

• Calibration of decel G sensor: Refer to 

BRC-10, "CALIBRATION OF DECEL G SENSOR : Description"

.

>> END

Condition

PRESS SENSOR

(DATA MONITOR)

With ignition switch turned ON and brake pedal released.

Approx. 0 bar

With ignition switch turned ON and brake pedal depressed.

0 to 170 bar

BRC-62

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C1143 STEERING ANGLE SENSOR

C1143 STEERING ANGLE SENSOR

Description

INFOID:0000000005517333

The steering angle sensor detects the rotation amount, angular velocity and direction of the steering wheel,
and transmits the data to the ABS actuator and electric unit (control unit) via CAN communication.

DTC Logic

INFOID:0000000005517334

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

1.

Turn the ignition switch ON.

2.

Perform self-diagnosis for “ABS” with CONSULT-III.

Is DTC “C1143” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-62, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005517335

1.

CHECK WHEEL ALIGNMENT

Check wheel alignment. Refer to 

FSU-8, "Inspection"

 (front), 

RSU-6, "Inspection"

 (rear).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Adjust wheel alignment. Refer to 

FSU-8, "Inspection"

 (front), 

RSU-6, "Adjustment"

 (rear).

2.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

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

3.

Disconnect steering angle sensor connector.

4.

Check terminal for deformation, disconnection, looseness, etc.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace or repair error-detected parts.

3.

CHECK STEERING ANGLE SENSOR HARNESS

1.

Turn the ignition switch ON.

CAUTION:

Never start the engine.

2.

Check the voltage between steering angle sensor harness connector and ground.

3.

Turn ignition switch OFF.

4.

Check the continuity between steering angle sensor harness connector and ground.

DTC

Display item

Malfunction detected condition

Possible cause

C1143

ST ANG SEN CIRCUIT

Neutral position of steering angle sensor is dislocated, 
steering angle sensor is malfunctioning, or wheel align-
ment is outside specified range.

• Harness or connector
• Steering angle sensor
• ABS actuator and electric unit 

(control unit)

• Wheel alignment

Steering angle sensor

—

Voltage

Connector

Terminal

M30

4

Ground

Battery voltage