Nissan Pathfinder. Manual — part 256

C1143 STEERING ANGLE SENSOR

BRC-83

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

NO

>> GO TO 4.

4.

CHECK STEERING ANGLE SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R connector E119.

3. Check continuity between steering angle sensor connector M54 terminal 4 and IPDM E/R connector E119

terminal 35.

4. Check continuity between steering angle sensor connector M54 terminal 4 and ground.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for ignition power supply.

NO

>> Repair or replace malfunctioning components.

5.

CHECK STEERING ANGLE SENSOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between steering angle sensor connector M54 terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace malfunctioning components.

6.

CHECK CAN COMMUNICATION LINE

Check “STRG BRANCH LINE CIRCUIT”. Refer to

LAN-121, "Diagnosis Procedure"

(Type 1) or

LAN-138,

"Diagnosis Procedure"

(Type 2).

Is the inspection result normal?

YES

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

BRC-123, "Removal and Installa-

tion"

.

NO

>> Repair or replace malfunctioning components.

Steering angle sensor

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

M54

4

E119

35

Yes

Steering angle sensor

—

Continuity

Connector

Terminal

M54

4

Ground

No

Steering angle sensor

—

Continuity

Connector

Terminal

M54

1

Ground

Yes

BRC-84

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C1144 INCOMPLETE STEERING ANGLE SENSOR ADJUSTMENT

C1144 INCOMPLETE STEERING ANGLE SENSOR ADJUSTMENT

DTC Logic

INFOID:0000000009177295

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAGNOSTIC RESULT

With CONSULT.

1. Turn ignition switch OFF to ON.

2. Perform self-diagnostic result.
Is DTC C1144 detected?

YES

>> Proceed to diagnosis procedure. Refer to

BRC-84, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009177296

1.

ADJUST THE NEUTRAL POSITION OF STEERING ANGLE SENSOR

Perform neutral position adjustment of steering angle sensor. Refer to

BRC-55, "Work Procedure"

.

>> GO TO 2.

2.

CHECK SELF-DIAGNOSTIC RESULT

With CONSULT.

Perform self-diagnostic result.
Is DTC C1144 detected?

YES

>> GO TO 3.

NO

>> Inspection End.

3.

CHECK STEERING ANGLE SENSOR SYSTEM

Check steering angle sensor system. Refer to

BRC-82, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

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

BRC-123, "Removal and Installa-

tion"

.

NO

>> Repair or replace malfunctioning components.

DTC

Display Item

Malfunction detected condition

Possible causes

C1144

ST ANG SEN SIGNAL

When neutral position adjustment of steering angle
sensor is not complete.

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

(control unit)

• Incomplete neutral position ad-

justment of steering angle sen-
sor

C1145, C1146 YAW RATE/SIDE/DECEL G SENSOR

BRC-85

< DTC/CIRCUIT 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/DECEL G SENSOR

DTC Logic

INFOID:0000000009177297

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAGNOSTIC RESULT

With CONSULT.

1. Turn ignition switch OFF to ON.

2. Perform self-diagnostic result.
Is DTC C1145 or C1146 detected?

YES

>> Proceed to diagnosis procedure. Refer to

BRC-85, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009177298

Regarding Wiring Diagram information, refer to

BRC-44, "Wiring Diagram"

.

CAUTION:

• A malfunction in yaw rate/side/decel G sensor system may be detected when the vehicle sharply

turns during a spin turn, acceleration turn or drift driving while VDC function is OFF (VDC OFF indi-

cator lamp is in ON status). This is not a malfunction if the status returns to normal after engine is

started again. In that case, erase self-diagnosis result memory using CONSULT.

• When the engine is in running status and the vehicle is on a turntable at the entrance of parking lot

or on a moving unit, SLIP indicator lamp may turn ON and “ABS” self-diagnosis may display “YAW

RATE SENSOR”. In this case, yaw rate sensor is not malfunctioning. The status returns to normal

when the vehicle leaves the turntable or moving unit and the engine is started again. In that case,

erase self-diagnosis result memory using CONSULT.

1.

CONNECTOR INSPECTION

1. Turn ignition switch OFF.

2. Disconnect ABS actuator and electric unit (control unit) and yaw rate/side/decel G sensor connectors.

3. Check connectors and terminals for deformation, disconnection, looseness or damage.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace as necessary.

2.

CHECK YAW RATE/SIDE/DECEL G SENSOR MOUNTING CONDITION

Check yaw rate/side/decel G sensor mounting condition. Refer to

BRC-125, "Exploded View"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning components.

3.

CHECK YAW RATE/SIDE/DECEL G SENSOR POWER SUPPLY

DTC

Display Item

Malfunction detected condition

Possible causes

C1145

YAW RATE SENSOR

• When a malfunction is detected in yaw rate signal.
• When yaw rate signal is not continuously received

for 2 seconds or more.

• When side G signal is not continuously received for

2 seconds or more.

• When decel G signal is not continuously received

for 2 seconds or more.

• Harness or connector
• Yaw rate/side/decel G sensor
• ABS actuator and electric unit

(control unit)

• Ignition power supply system
• Fuse

C1146

SIDE G-SEN CIRCUIT

When a malfunction is detected in side/decel G sig-
nal.

BRC-86

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C1145, C1146 YAW RATE/SIDE/DECEL G SENSOR

1. Turn ignition switch OFF.

2. Disconnect yaw rate/side/decel G sensor connector.

3. Turn the ignition switch ON.

4. Check voltage between yaw rate/side/decel G sensor connector M160 terminal 4 and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair circuit between splice and yaw rate/side/decel G sensor terminal 4.

4.

CHECK YAW RATE/SIDE/DECEL G SENSOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between yaw rate/side/decel G sensor connector M160 terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace malfunctioning components.

5.

CHECK COMMUNICATION LINES

1. Disconnect ABS actuator and electric unit (control unit) connector E125.

2. Check continuity between yaw rate/side/decel G sensor connector M160 terminals 2, 3 and ABS actuator

and electric unit (control unit) connector E125 terminals 6, 16.

3. Check continuity between yaw rate/side/decel G sensor connector M160 terminals 2, 3 and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace malfunctioning components.

6.

CHECK COMMUNICATION LINES RESISTANCE

1. Connect ABS actuator and electric unit (control unit) connector E125.

2. Check resistance between yaw rate/side/decel G sensor connector M160 terminals 2, 3.

Is the inspection result normal?

Yaw rate/side/decel G sensor

—

Voltage

(Approx.)

Connector

Terminal

M160

4

Ground

Battery voltage

Yaw rate/side/decel G sensor

—

Continuity

Connector

Terminal

M160

1

Ground

Yes

Yaw rate/side/decel G sensor

ABS actuator and electric unit (control unit)

Continuity

Connector

Terminal

Connector

Terminal

M160

2

E125

6

Yes

3

16

Yaw rate/side/decel G sensor

Ground

Continuity

Connector

Terminal

M160

2

—

No

3

Yaw rate/side/decel G sensor

Resistance

Connector

Terminal

M160

2

100 – 140

Ω

3