Infiniti G37 Coupe. Manual - part 1263

C1914 REAR WHEEL STEERING ANGLE SENSOR

STC-103

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace 4WAS rear actuator. Refer to 

STC-180, "Exploded View"

.

Special Repair Requirement

INFOID:0000000001666415

BEFORE REPLACING 4WAS MAIN CONTROL UNIT

• Record the self-diagnosis results (history).

CAUTION:

• Never erase the memory (history) of self-diagnosis results when replacing 4WAS main control unit

after diagnosis.

• Erase the memory of the self-diagnosis results (record) after printing out or recording all the val-

ues of “DATA MONITOR”.

Rear wheel steering angle sensor

Resistance (Approx.)

Connector

Terminal

B35

1 – 3

1 k

Ω

1 – 2

1.2 – 1.5 k

Ω

1 – 4

1.2 – 1.5 k

Ω

STC-104

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR

C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR

Description

INFOID:0000000001666416

• It detects the steering angle condition of rear wheel.
• 2 systems (main and sub sensor) are equipped.

DTC Logic

INFOID:0000000001666417

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

RECHECK DTC

With CONSULT-III

1.

Turn the ignition switch from OFF to ON.

2.

Perform 4WAS main control unit self-diagnosis.

Is DTC “C1915” or “C1916” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-104, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001666418

1.

CHECK 4WAS REAR ACTUATOR

1.

Turn the ignition switch OFF.

2.

Measure “A” and “B” of 4WAS rear actuator as shown in the fig-
ure.

Is the differential of “A” and “B” 5.8 mm (0.228 in) or less?

YES

>> GO TO 2.

NO

>> Replace 4WAS rear actuator. Refer to 

STC-180,

"Exploded View"

.

2.

CHECK REAR WHEEL STEERING ANGLE SENSOR (1)

With CONSULT-III

1.

 Start engine.

CAUTION:

Check condition with the vehicle stopped.

2.

Check DATA MONITOR “RR ST ANG-MAI” and “RR ST ANG-SUB” value of 4WAS main control unit.

Is the inspection result normal?

YES

>> GO TO 3.

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

C1915

RR ST ANGLE SENSOR
[MAIN SIGNAL]

The rear wheel angle sensor signal (main) error is de-
tected.

Rear wheel steering sen-
sor output voltage error

C1916

RR ST ANGLE SENSOR
[SUB SIGNAL]

If the rear wheel angle sensor signal (sub) error is de-
tected.

Rear wheel steering sen-
sor output voltage error

JSGIA0086ZZ

Monitored item

Condition

Display value

RR ST ANG-MAI

Straight-ahead

Approx. 2.4 V

RR ST ANG-SUB

Straight-ahead

Approx. 2.6 V

C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR

STC-105

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

NO

>> Replace 4WAS rear actuator. Refer to 

STC-180, "Exploded View"

.

3.

CHECK REAR WHEEL STEERING ANGLE SENSOR (2)

Check the voltage between 4WAS main control unit harness connector terminal and ground.

Is the differential between terminal voltage No. 4 and No.7 approximately 1 V or more?

YES 

>> Replace 4WAS main control unit. Refer to 

STC-178, "Exploded View"

.

NO

>> GO TO 4.

4.

CHECK REAR WHEEL STEERING ANGLE SENSOR (3)

1.

Turn the ignition switch OFF.

2.

Disconnect rear wheel steering angle sensor harness connector.

3.

Check resistance between rear wheel steering angle sensor connector terminals.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace 4WAS rear actuator. Refer to 

STC-180, "Exploded View"

.

5.

CHECK REAR WHEEL STEERING ANGLE SENSOR GROUND CIRCUIT

1.

Disconnect 4WAS main control unit harness connector.

2.

Check for continuity between 4WAS main control unit harness connector terminal and rear wheel steering
angle sensor harness connector terminal.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace each harness and connector.

6.

PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)

With CONSULT-III

1.

Connect 4WAS main control unit harness connector.

2.

Connect rear wheel steering angle sensor harness connector.

3.

Perform 4WAS main control unit self-diagnosis.

4WAS main control unit

Voltage (Approx.)

Connector

Terminal

B54

4 – Ground

2.4 V

7 – Ground

2.6 V

Rear wheel steering angle sensor

Resistance (Approx.)

Connector

Terminal

B35

1 – 3

1 k

Ω

1 – 2

1.2 – 1.5 k

Ω

1 – 4

1.2 – 1.5 k

Ω

4WAS main control unit

Rear wheel steering angle 

sensor

Continuity

Connector

Terminal

Connector

Terminal

B54

4

B35

1, 2, 3

Not existed

B54

4

B35

4

Existed

B54

7

B35

1, 3, 4

Not existed

B54

7

B35

2

Existed

B54

5

B35

1

Existed

B54

5

B35

2, 3, 4

Not existed

B54

15

B35

1, 2, 4

Not existed

B54

15

B35

3

Existed

STC-106

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR

Is DTC “C1915” or “C1916” detected?

YES

>> Replace 4WAS main control unit. Refer to 

STC-178, "Exploded View"

.

NO

>> GO TO 7.

7.

CHECK INFORMATION

With CONSULT-III

Check the “DATA MONITOR” value of each DTC detected with the self-diagnosis function. Refer to 

STC-155,

"Reference Value"

.

Is each data standard?

YES

>> Check pin terminal and connection of each harness connector for non-standard conditions.

NO

>> Replace 4WAS main control unit. Refer to 

STC-178, "Exploded View"

.

Component Inspection

INFOID:0000000001666419

1.

CHECK REAR WHEEL STEERING ANGLE SENSOR

1.

Turn the ignition switch OFF.

2.

Disconnect rear wheel steering angle sensor harness connector.

3.

Check the resistance between rear wheel steering angle sensor connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace 4WAS rear actuator. Refer to 

STC-180, "Exploded View"

.

Special Repair Requirement

INFOID:0000000001666420

BEFORE REPLACING 4WAS MAIN CONTROL UNIT

• Record the self-diagnosis results (history).

CAUTION:

• Never erase the memory (history) of self-diagnosis results when replacing 4WAS main control unit

after diagnosis.

• Erase the memory of the self-diagnosis results (record) after printing out or recording all the val-

ues of “DATA MONITOR”.

Rear wheel steering angle sensor

Resistance (Approx.)

Connector

Terminal

B35

1 – 3

1 k

Ω

1 – 2

1.2 – 1.5 k

Ω

1 – 4

1.2 – 1.5 k

Ω