Infiniti G35 (V35) Sedan. Manual - part 1305

STC-110

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C1919 VEHICLE SPEED SIGNAL

C1919 VEHICLE SPEED SIGNAL

Description

INFOID:0000000000958864

• The vehicle speed signal is transmitted from ABS actuator and electric unit (control unit) to 4WAS main con-

trol unit via CAN communication.

DTC Logic

INFOID:0000000000958865

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

RECHECK DTC

 With CONSULT-III

1.

Turn the ignition switch OFF to ON.

2.

Perform 4WAS main control unit self-diagnosis.

Is DTC “C1919” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-110, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000958866

1.

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

 With CONSULT-III

 Perform ABS actuator and electrical unit (control unit) self-diagnosis. 

Is any error system detected?

YES

>> Check the error system.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)

 With CONSULT-III

Perform 4WAS main control unit self-diagnosis.
Is DTC “U1000” or “U1010” detected?

YES

>> Check the error system.

NO

>> GO TO 3.

3.

PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)

 With CONSULT-III

Perform 4WAS main control unit self-diagnosis.

Is DTC “C1919” detected?

YES

>> Replace 4WAS main control unit. Refer to 

STC-178, "Exploded View"

.

NO

>> GO TO 4.

4.

INFORMATION CHECK

 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 the standard value?

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

C1919

VEHICLE SPEED SEN
[NO SIGNAL]

Malfunction is detected in vehicle speed signal that is 
output from ABS actuator and electric unit (control unit) 
through CAN communication.
(Improper signal inputs while driving.)

Vehicle speed signal error

C1919 VEHICLE SPEED SIGNAL

STC-111

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

YES

>> Check that there is no malfunction in each harness connector pin terminal or disconnection.

NO

>> Replace 4WAS main control unit. Refer to 

STC-178, "Exploded View"

.

Special Repair Requirement

INFOID:0000000000958867

BEFORE REPLACING 4WAS MAIN CONTROL UNIT

• Record the self-diagnosis results (history).

CAUTION:

• Replace it without erasing 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” when erasing the memory of the self-diagnosis results (record).

STC-112

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C1920 STEERING ANGLE SEN

C1920 STEERING ANGLE SEN

Description

INFOID:0000000000958868

• Steering angle sensor signal is transmitted to 4WAS main control unit from 4WAS main control unit via CAN

communication.

DTC Logic

INFOID:0000000000958869

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

RECHECK DTC

 With CONSULT-III

1.

Turn the ignition switch OFF to ON.

2.

Perform 4WAS main control unit self-diagnosis.

Is DTC “C1920” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-112, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000958870

1.

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

 With CONSULT-III

 Perform ABS actuator and electric unit (control unit) self-diagnosis.

Is any error system detected?

YES

>> Check the error system.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)

 With CONSULT-III

Perform 4WAS main control unit self-diagnosis.
Is DTC “U1000” or “U1010” detected?

YES

>> Check the error system.

NO

>> GO TO 3.

3.

PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)

 With CONSULT-III

Perform 4WAS main control unit self-diagnosis.

Is DTC “C1920” detected?

YES

>> Replace 4WAS main control unit. Refer to 

STC-178, "Exploded View"

.

NO

>> GO TO 4.

4.

INFORMATION CHECK

 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 the standard value?

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

C1920

STEERING ANGLE SEN
[NO SIGNAL]

Malfunction is detected in steering angle sensor signal 
that is output from steering angle sensor with CAN 
communication.
(No transmission from the steering angle sensor)

Steering angle sensor in-
put signal error

C1920 STEERING ANGLE SEN

STC-113

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

YES

>> Check that there is no malfunction in each harness connector pin terminal or disconnection.

NO

>> Replace 4WAS main control unit. Refer to 

STC-178, "Exploded View"

.

Special Repair Requirement

INFOID:0000000000958871

BEFORE REPLACING 4WAS MAIN CONTROL UNIT

• Record the self-diagnosis results (history).

CAUTION:

• Replace it without erasing 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” when erasing the memory of the self-diagnosis results (record).

AFTER REPLACING STEERING ANGLE SENSOR

1.

PERFORM ACTIVE TEST (LOCK OPERATION)

 With CONSULT-III

1.

Stop vehicle with front wheels in the straight-ahead position.

2.

Turn the ignition switch ON.

CAUTION:

Never start engine.

3.

Select “LOCK OPERATION” item on “ACTIVE” of 4WAS front control unit.

4.

Perform “RELEASE” of “ACTIVE TEST”.

CAUTION:

• Turn steering wheel 90

°

, and then check that front tire does not move.

• Never turn steering wheel 1 turn or more while performing “RELEASE”.

5.

Place steering wheel in neutral position.

6.

Perform “LOCK” item on “ACTIVE TEST” of 4WAS front control unit.

7.

Steer to 30

°

 leftward slowly. Steer to 30

°

 rightward and return the steering wheel to the straight-ahead

position.

8.

Complete active test of 4WAS front control unit.

>> GO TO 2.

2.

STEERING ANGLE SENSOR NEUTRA POSITION ADJUSTMENT

 With CONSULT-III

1.

Adjust steering angle sensor neutral position. Refer to 

BRC-8, "ADJUSTMENT OF STEERING ANGLE

SENSOR NEUTRAL POSITION : Special Repair Requirement"

.

2.

Turn the ignition switch OFF.

>> GO TO 3.

3.

RETURN TO 4WAS FRONT ACTUATOR INITIAL POSITION

1.

Start engine.

CAUTION:

Check that condition with the vehicle stopped.

2.

Turn steering wheel to the left by 90

°

 slowly, and then turn to the right by 90

°

.

3.

Again, turn steering wheel to the left by 90

°

 slowly, and then turn to the right by 90

°

 so that it faces straight

ahead.

4.

Stop vehicle with front wheels in the straight-ahead position after driving vehicle for a short time. (Engine
starting)

>> GO TO 4.

4.

CHECK 4WAS FRONT ACTUATOR

 With CONSULT-III

1.

Check “

4WAS S

T

R

 ANG” item on “DATA MONITOR” of 4WAS front control unit.

CAUTION:

Never touch steering wheel while performing.