Nissan Pathfinder (2008 year). Manual - part 94

BRC-58

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C1143, C1144 STEERING ANGLE SENSOR

C1143, C1144 STEERING ANGLE SENSOR

Description

INFOID:0000000001690875

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:0000000001690876

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAGNOSIS RESULTS

Check the self-diagnosis results.

Is above displayed on the self-diagnosis display?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-58, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001690877

INSPECTION PROCEDURE

1.

CHECK CONNECTOR

1.

Turn 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, and so on. If any malfunction is found, repair or
replace terminal.

5.

Reconnect connectors and then perform the self-diagnosis. Refer to 

BRC-21, "CONSULT-III Function

(ABS)"

Is any item indicated on the self-diagnosis display?

YES

>> GO TO 2

NO

>> Poor connection of connector terminal. Repair or replace connector.

2.

CHECK STEERING ANGLE SENSOR HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect steering angle sensor connector.

DTC

Display item

Malfunction detected condition

Possible cause

C1143

ST ANG SEN CIRCUIT

Neutral position of steering angle sensor is dislocated, or 
the steering angle sensor is malfunctioning.

• Harness or connector
• Steering angle sensor
• 4WAS control unit (4WAS 

models)

• ABS actuator and electric unit 

(control unit)

C1144

ST ANG SEN SIGNAL

Neutral position of steering angle sensor is not finished.

Self-diagnosis results

ST ANG SEN CIRCUIT

ST ANG SEN SIGNAL

C1143, C1144 STEERING ANGLE SENSOR

BRC-59

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

3.

Check continuity between steering angle sensor harness con-
nector terminal and ground.

4.

Turn ignition switch ON.

5.

Check voltage between steering angle sensor harness connec-
tor terminal and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair or replace malfunctioning components.

3.

CHECK DATA MONITOR

1.

Connect the steering angle sensor connector and ABS actuator and electric unit (control unit) connector.

2.

Select “STR ANGLE SIG” in “DATA MONITOR” and check steering angle sensor signal.

Is the inspection result normal?

YES

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

BRC-123, "Removal and Installa-

tion"

.

NO

>> Replace steering angle sensor and adjust neutral position of steering angle sensor. Refer to 

BRC-

125, "Removal and Installation"

.

Component Inspection

INFOID:0000000001690878

1.

CHECK DATA MONITOR

Select “STR ANGLE SIG” in “DATA MONITOR” and check steering angle sensor signal.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to diagnosis procedure. Refer to 

BRC-58, "Diagnosis Procedure"

.

Special Repair Requirement

INFOID:0000000001690879

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Steering angle sensor

—

Continuity

Connector

Terminal

M17

2

Ground

Yes

WFIA0399E

Steering angle sensor

—

Voltage

Connector

Terminal

M17

3

Ground

Battery voltage

AWFIA0023ZZ

Steering condition

STR ANGLE SIG (DATA MONITOR)

Driving straight

±

2.5 

°

Turn 90 

°

 to right

Approx. +90 

°

Turn 90 

°

 to left

Approx. 

−

90 

°

Steering condition

STR ANGLE SIG (DATA MONITOR)

Driving straight

 

±

2.5 

°

Turn 90 

°

 to right

Approx. +90 

°

Turn 90 

°

 to left

Approx. 

−

90 

°

BRC-60

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C1143, C1144 STEERING ANGLE SENSOR

Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to 

BRC-11, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL

POSITION : Description"

.

>> GO TO 2

2.

CALIBRATION OF DECEL G SENSOR

Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).
Refer to 

BRC-12, "CALIBRATION OF DECEL G SENSOR : Description"

.

>> END

C1145, C1146 YAW RATE/SIDE G SENSOR

BRC-61

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

C1145, C1146 YAW RATE/SIDE G SENSOR

Diagnosis Procedure

INFOID:0000000001730977

CAUTION:

Sudden turns (such as spin turns, acceleration turns), drifting, etc. when VDC function is OFF may
cause the yaw rate/side/decel G sensor system to indicate a problem. This is not a problem if normal
operation can be resumed after restarting the engine.

INSPECTION PROCEDURE

1.

SELF-DIAGNOSIS RESULT CHECK

Check self-diagnosis results.

CAUTION:

If vehicle is on turntable at entrance to parking garage, or on other moving surface, VDC OFF indicator
lamp may illuminate and CONSULT-II self-diagnosis may indicate yaw rate sensor system malfunction.
However, in this case there is no malfunction in yaw rate sensor system. Take vehicle off of turntable
or other moving surface, and start engine. Results will return to normal.

Is the above displayed in the self-diagnosis display items?

YES

>> GO TO 2.

NO

>> Inspection End.

2.

CONNECTOR INSPECTION

Disconnect the ABS actuator and electric unit (control unit) connector E125 and yaw rate/side/decel G sensor
connector B73. 
Check the terminals for deformation, disconnection, looseness or damage.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace as necessary.

3.

YAW RATE/SIDE/DECEL G SENSOR HARNESS INSPECTION

1.

Turn off the ignition switch and disconnect yaw rate/side/decel G sensor connector B73 and ABS actuator
and electric unit (control unit) connector E125.

2.

Check continuity between the ABS actuator and electric unit (control unit) connector E125 and the yaw
rate/side/decel G sensor connector B73.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace as necessary.

4.

YAW RATE/SIDE/DECEL G SENSOR INSPECTION

1.

Connect the yaw rate/side/decel G sensor connector B73 and ABS actuator and electric unit (control unit)
connector E125.

Self-diagnosis results

YAW RATE SENSOR

SIDE G-SEN CIRCUIT

G-SENSOR

ABS actuator and electric unit 

(control unit) harness connector 

E125

Yaw rate/side/decel G sensor

harness connector B73

Continuity

6

3

Yes

24

5

Yes

25

1

Yes

29

2

Yes

BRC-62

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C1145, C1146 YAW RATE/SIDE G SENSOR

2.

Use “DATA MONITOR” to check if the yaw rate/side/decel G sensor signals are normal. 

OK or NG

OK

>> Inspection End.

NG

>> Replace the yaw rate/side/decel G sensor. Refer to 

BRC-126, "Removal and Installation"

.

Vehicle status

Yaw rate sensor

(Data monitor standard)

Side G sensor

(Data monitor standard)

Decel G Sensor

(Data monitor standard)

When stopped

-4 to +4 deg/s

-1.1 to +1.1 m/s

-0.11 G to +0.11 G

Right turn

Negative value

Negative value

-

Left turn

Positive value

Positive value

-

Speed up

-

-

Negative value

Speed down

-

-

Positive value

C1155 BRAKE FLUID LEVEL SWITCH

BRC-63

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

C1155 BRAKE FLUID LEVEL SWITCH

Description

INFOID:0000000001690880

The brake fluid level switch converts the brake fluid level to an electric signal and transmits it to the ABS actu-
ator and electric unit (control unit). 

DTC Logic

INFOID:0000000001690881

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAGNOSIS RESULTS

Check the self-diagnosis results.

Is above displayed on the self-diagnosis display?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-63, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001690882

INSPECTION PROCEDURE

1.

CONNECTOR INSPECTION

1.

Disconnect ABS actuator and electric unit (control unit) connector E125 and brake fluid level switch con-
nector E21. 

2.

Check the terminals for deformation, disconnection, looseness or damage.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Repair or replace as necessary.

2.

CHECK HARNESS BETWEEN BRAKE FLUID LEVEL SWITCH AND ABS ACTUATOR AND ELECTRIC

UNIT (CONTROL UNIT)

1.

Check continuity between ABS actuator and electric unit (control
unit) harness connector E125 (A) and brake fluid level switch
harness connector E21 (B).

2.

Check continuity between ABS actuator and electric unit (control
unit) harness connector E125 (A) and ground.

Is the inspection result normal?

DTC

Display item

Malfunction detected condition

Possible cause

C1155

BR FLUID LEVEL LOW

Brake fluid level is low or communication line between 
the ABS actuator and electric unit (control unit) and brake 
fluid level switch is open or shorted.

• Harness or connector
• Brake fluid level switch
• Brake fluid level

Self-diagnosis results

BR FLUID LEVEL LOW

ABS actuator and electric unit 

(control unit)

Brake fluid level switch

Continuity

Connector

Terminal

Connector

Terminal

A: E125

8

B: E21

1

Yes

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

A: E125

8

Ground

No

AWFIA0025ZZ

BRC-64

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C1155 BRAKE FLUID LEVEL SWITCH

YES

>> GO TO 3

NO

>> Repair or replace malfunctioning components.

3.

CHECK BRAKE FLUID LEVEL SWITCH GROUND

Check continuity between brake fluid level switch harness connector
E21 and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair or replace malfunctioning components.

4.

CHECK BRAKE FLUID LEVEL SWITCH

Check continuity between brake fluid level switch terminals.

Is the inspection result normal?

YES

>> Perform self-diagnosis again. If the same results

appear, replace ABS actuator and electric unit (control unit). Refer to 

BRC-123, "Removal and

Installation"

.

NO

>> Replace brake fluid level switch.

Component Inspection

INFOID:0000000001690883

1.

CHECK BRAKE FLUID LEVEL SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect brake fluid level switch connector.

3.

Check continuity between brake fluid level switch terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace brake fluid level switch.

Special Repair Requirement

INFOID:0000000001690884

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to 

BRC-11, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL

POSITION : Description"

.

Brake fluid level switch

—

Continuity

Connector

Terminal

E21

2

Ground

Yes

AWFIA0026ZZ

Brake fluid level switch

Condition

Continuity

Terminal

1 

−

 2

When brake fluid is full in the reser-
voir tank.

No

When brake fluid is empty in the 
reservoir tank.

Yes

ALFIA0026ZZ

Brake fluid level switch

Condition

Continuity

Terminal

1 

−

 2

When brake fluid is full in the reser-
voir tank.

No

When brake fluid is empty in the 
reservoir tank.

Yes

ALFIA0026ZZ

C1155 BRAKE FLUID LEVEL SWITCH

BRC-65

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

>> GO TO 2

2.

CALIBRATION OF DECEL G SENSOR

Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).
Refer to 

BRC-12, "CALIBRATION OF DECEL G SENSOR : Description"

.

>> END