Infiniti M35/M45 Y50. Manual - part 1121

TROUBLE DIAGNOSIS

STC-41

[RAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

2. 

CHECK (1): REAR WHEEL STEERING ANGLE SENSOR POWER SUPPLY AND GROUND CIRCUIT

1.

Turn ignition switch OFF, and disconnect rear wheel steering angle sensor harness connector B465.

2.

Check continuity rear wheel steering angle sensor harness con-
nector B465 and ground.

3.

Turn ignition switch ON, and then check voltage rear wheel
steering angle sensor harness connector B465 and ground.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3. 

CHECK (2): REAR WHEEL STEERING ANGLE SENSOR POWER SUPPLY AND GROUND CIRCUIT

1.

Turn ignition switch OFF, disconnect rear wheel steering angle sensor harness connector B465 and RAS
control unit harness connector B476.

2.

Check continuity each harness connector of rear wheel steering
angle sensor harness connector B465 (A) and RAS control unit
harness connector B476 (B).

OK or NG

OK

>> RAS control unit malfunction. Replace RAS control unit.

NG

>> Harness between rear wheel steering angle sensor and

RAS control unit open or shorted. Repair or replace har-
ness.

Terminal 3 

−

 Ground

: Continuity should exist.

SGIA1272E

Terminal 1 

−

 Ground

: Approx. 5 V

SGIA1273E

Rear wheel steering angle sensor

RAS control unit

Continuity

Terminal 1

Terminal 5

Yes

Terminal 3

Terminal 15

Yes

SGIA1650E

STC-42

[RAS]

TROUBLE DIAGNOSIS

4. 

CHECK REAR WHEEL STEERING ANGLE SENSOR OUTPUT SIGNAL

1.

Connect rear wheel steering angle sensor harness connector B465.

2.

Check voltage RAS control unit harness connector B476 when
starting the engine and turning the steering wheel from neutral
position clockwise/counterclockwise by 180

°

.

CAUTION:

There is approximately 1 V or more difference between main output and sub output at straight-ahead position, inspection
results are “NG”.

OK or NG

OK

>> RAS control unit malfunction. Replace RAS control unit.

NG

>> GO TO 5.

5. 

CHECK REAR WHEEL STEERING ANGLE SENSOR OUTPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF, disconnect rear wheel steering angle sensor harness connector B465 and RAS
control unit harness connector B476.

2.

Check continuity between each harness connector of rear wheel
steering angle sensor harness connector B465 (A) and RAS
control unit harness connector B476 (B).

OK or NG

OK

>> Rear wheel steering angle sensor malfunction. Replace

rear wheel steering angle sensor.

NG

>> Harness between rear wheel steering angle sensor and

RAS control unit open or shorted. Repair or replace harness.

SGIA1275E

Steering condition

Rear wheel steering angle sensor

Rear main output

Terminal 4 (+) - 15 (-)

Rear sub output

Terminal 7 (+) - 15 (-)

Straight-ahead (neutral position)

Approx. 2.4 V

Approx. 2.4 V

Turn wheel to the right by 180

°

Approx. 4.4 V

Approx. 4.4 V

Turn wheel to the left by 180

°

Approx. 0.4 V

Approx. 0.4 V

Rear wheel steering angle sensor

RAS control unit

Continuity

Terminal 2

Terminal 7

Yes

Terminal 4

Terminal 4

Yes

SGIA1651E

TROUBLE DIAGNOSIS

STC-43

[RAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

Inspection 7: VDC Malfunction

NGS000EW

1. 

CHECK RAS CONTROL UNIT CONNECTOR

1.

Turn ignition switch OFF, disconnect RAS control unit harness connector and rear wheel steering angle
sensor harness connector, and check terminal for deformation, disconnection, looseness, etc.

2.

Reconnect harness connector securely, and perform self-diagnosis.

With CONSULT-II

Without CONSULT-II

Is above displayed on self-diagnosis display?

YES

>> GO TO 2.

NO

>> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-

nal.

2. 

CHECK SELF-DIAGNOSTIC RESULTS

Perform VDC self-diagnosis. Refer to 

BRC-24, "Self-Diagnosis"

 .

OK or NG

OK

>> RAS control unit malfunction. Replace RAS control unit.

NG

>> Repair or replace indicated part. After that, perform RAS self-diagnosis again to make sure that

there is no malfunction.

Self-diagnosis results

VDC [C1929]

DTC (warning lamp blinks)

26

STC-44

[RAS]

TROUBLE DIAGNOSIS

Inspection 8: Engine Speed Signal Malfunction

NGS000EX

1. 

CHECK SPEEDOMETER

Start the engine, and then check the combination meter (tachometer) operation.
Does it operate normally?

YES

>> GO TO 2.

NO

>> Combination meter. Refer to 

DI-5, "COMBINATION METERS"

 .

2. 

CHECK RAS CONTROL UNIT CONNECTOR

1.

Turn ignition switch OFF, disconnect RAS control unit harness connector, and check terminal for deforma-
tion, disconnection, looseness, etc.

2.

Reconnect harness connector securely, and perform self-diagnosis.

With CONSULT-II

Without CONSULT-II

Is above displayed on self-diagnosis display?

YES

>> RAS control unit malfunction. Replace RAS control unit.

NO

>> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-

nal.

Inspection 9: CAN Communication System Malfunction

NGS000EY

1. 

CHECK RAS CONTROL UNIT CONNECTOR

1.

Turn ignition switch OFF, disconnect RAS control unit harness connector and rear wheel steering angle
sensor harness connector, and check terminal for deformation, disconnection, looseness, etc.

2.

Reconnect harness connector securely, and perform CONSULT-II self-diagnosis.

Is above displayed on self-diagnosis display?

YES

>>

●

If “CAN COMM [U1000]” is displayed, print out self–diagnosis. And then, GO TO 

LAN-50, "CAN

System Specification Chart"

 .

●

Replace RAS control unit if “CONTROL UNIT [CAN] [U1010]” is displayed.

NO

>> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-

nal.

Self-diagnostic results

MOTOR OUTPUT [C1921]

DTC (warning lamp blinks)

33

Self-diagnostic results

CAN COMM CIRCUIT [U1000]

CONTROL UNIT (CAN) [U1010]