Infiniti G35 (V35) Sedan. Manual - part 1295

 

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Infiniti G35 (V35) Sedan. Manual - part 1295

 

 

STC-70

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C1667 LOCK INSERTION

C1667 LOCK INSERTION

Description

INFOID:0000000000958787

• Wiring connected to 4WAS front actuator is integrated with 4WAS front actuator.
• 4WAS front actuator rotates together with steering wheel.
• 4WAS front actuator mainly consists of five components.[4WAS front lock solenoid valve (lock structure),

front wheel steering angle sensor, 4WAS front motor, gear shaft, and spiral cable]

- 4WAS front lock solenoid valve (lock structure) is controlled by the 4WAS front control unit, and locks/

unlocks 4WAS front actuator.

- If a strong force (rotation direction) is applied to 4WAS front actuator, the locking mechanism (holder)

absorbs the force and locks 4WAS front actuator.

- Front wheel steering angle sensor detects a turning angle of 4WAS front motor.
- 4WAS front motor controls number of revolutions by a command value from the 4WAS front control unit.
- Gear shaft is an output axis of 4WAS front motor.(Gear shaft = 4WAS front motor revolution + steering

angle)

- Spiral cables mean the power line and signal lines of 4WAS front motor.

DTC Logic

INFOID:0000000000958788

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

RECHECK DTC

 With CONSULT-III

1.

Start the engine.

CAUTION:

Stop the vehicle.

2.

Steer 30

°

 leftward slowly. Steer 30

°

 rightward. Return the steering wheel to the straight-ahead position.

3.

Turn the ignition switch OFF.

4.

Turn the ignition switch ON.

5.

Perform 4WAS front control unit self-diagnosis.

Is DTC “C1667” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-70, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000958789

1.

CHECK 4WAS FRONT LOCK SOLENOID VALVE (LOCK STRUCTURE)

 With CONSULT-III

1.

Start the engine.

CAUTION:

Stop the vehicle.

2.

Steer 30

°

 leftward slowly. Steer 30

°

 rightward. Return the steering wheel to the straight-ahead position.

3.

Turn the ignition switch OFF.

4.

Turn the ignition switch ON.

5.

Perform 4WAS front control unit self-diagnosis.

Is DTC “C1667” detected?

YES

>> Replace 4WAS front actuator. Refer to 

ST-21, "WITH 4WAS : Exploded View"

.

NO

>> GO TO 2.

2.

CHECK INFORMATION

 With CONSULT-III

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

C1667

LOCK INSERTION

4WAS front lock solenoid valve (lock) error is detected.
(An error is detected in lock condition.)

The inside 4WAS front 
actuator error is detected.

C1667 LOCK INSERTION

STC-71

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

1.

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

STC-

142, "Reference Value"

.

2.

Perform 4WAS front control unit self-diagnosis.

Is each data the standard value?

YES

>> GO TO 1.

NO

>> Replace 4WAS front control unit. Refer to 

STC-177, "Exploded View"

.

Special Repair Requirement

INFOID:0000000000958790

AFTER REPLACING 4WAS FRONT ACTUATOR

• Perform 4WAS front actuator adjustment after replacing 4WAS front actuator. Refer to 

STC-28, "4WAS

FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Special Repair Requirement (Pattern 2)"

.

STC-72

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C1668 LOCK HOLDER GAP DETECT

C1668 LOCK HOLDER GAP DETECT

Description

INFOID:0000000000958791

• Wiring connected to 4WAS front actuator is integrated with 4WAS front actuator.
• 4WAS front actuator rotates together with steering wheel.
• 4WAS front actuator mainly consists of five components.[4WAS front lock solenoid valve (lock structure),

front wheel steering angle sensor, 4WAS front motor, gear shaft, and spiral cable]

- 4WAS front lock solenoid valve (lock structure) is controlled by the 4WAS front control unit, and locks/

unlocks 4WAS front actuator.

- If a strong force (rotation direction) is applied to 4WAS front actuator, the locking mechanism (holder)

absorbs the force and locks 4WAS front actuator.

- Front wheel steering angle sensor detects a turning angle of 4WAS front motor.
- 4WAS front motor controls number of revolutions by a command value from the 4WAS front control unit.
- Gear shaft is an output axis of 4WAS front motor.(Gear shaft = 4WAS front motor revolution + steering

angle)

- Spiral cables mean the power line and signal lines of 4WAS front motor.

DTC Logic

INFOID:0000000000958792

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

RECHECK DTC

 With CONSULT-III

1.

Turn the ignition switch OFF to ON.

2.

Perform 4WAS front control unit self-diagnosis.

Is DTC “C1668” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-72, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000958793

1.

PERFORM SELF-DIAGNOSIS (4WAS FRONT CONTROL UNIT)

 With CONSULT-III

1.

Start the engine.

CAUTION:

Stop the vehicle.

2.

Perform 4WAS front control unit self-diagnosis. Check that DTC “C1668” is detected.

CAUTION:

• Replace 4WAS front actuator when the diagnosis history remains.
• Never repair the malfunctioning part in 4WAS front actuator adjustment without replacing 4WAS

front actuator.

>> Replace 4WAS front actuator. Refer to 

ST-21, "WITH 4WAS : Exploded View"

.

Special Repair Requirement

INFOID:0000000000958794

AFTER REPLACING 4WAS FRONT ACTUATOR

• Perform 4WAS front actuator adjustment after replacing 4WAS front actuator. Refer to 

STC-28, "4WAS

FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Special Repair Requirement (Pattern 2)"

.

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

C1668

LOCK HLD GAP DETCT

4WAS front lock solenoid valve (lock) error is detected.
(Excessive force is applied to the lock.)

The inside 4WAS front 
actuator error is detected.

C1669 INCOMPLETE LOCK RELEASE

STC-73

< COMPONENT DIAGNOSIS >

[WITH 4WAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

C1669 INCOMPLETE LOCK RELEASE

Description

INFOID:0000000000958795

• Wiring connected to 4WAS front actuator is integrated with 4WAS front actuator.
• 4WAS front actuator rotates together with steering wheel.
• 4WAS front actuator mainly consists of five components.[4WAS front lock solenoid valve (lock structure),

front wheel steering angle sensor, 4WAS front motor, gear shaft, and spiral cable]

- 4WAS front lock solenoid valve (lock structure) is controlled by the 4WAS front control unit, and locks/

unlocks 4WAS front actuator.

- If a strong force (rotation direction) is applied to 4WAS front actuator, the locking mechanism (holder)

absorbs the force and locks 4WAS front actuator.

- Front wheel steering angle sensor detects a turning angle of 4WAS front motor.
- 4WAS front motor controls number of revolutions by a command value from the 4WAS front control unit.
- Gear shaft is an output axis of 4WAS front motor.(Gear shaft = 4WAS front motor revolution + steering

angle)

- Spiral cables mean the power line and signal lines of 4WAS front motor.

DTC Logic

INFOID:0000000000958796

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

RECHECK DTC

 With CONSULT-III

1.

Turn the ignition switch OFF to ON.

2.

Perform 4WAS front control unit self-diagnosis.

Is DTC “C1669” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-73, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000958797

1.

CHECK INFORMATION

• Check that any item below is applicable.
- The steering force is heavy when turning 4WAS warning lamp ON.
- The power steering system error is detected (oil leakage, belt tension, steering force etc.).

Is the item applicable?

YES

>> Perform the symptom diagnosis for the steering system. Refer to 

ST-3, "NVH Troubleshooting

Chart"

.

NO

>> Replace 4WAS front actuator. Refer to 

ST-21, "WITH 4WAS : Exploded View"

.

Special Repair Requirement

INFOID:0000000000958798

AFTER REPLACING 4WAS FRONT ACTUATOR

• Perform 4WAS front actuator adjustment after replacing 4WAS front actuator. Refer to 

STC-28, "4WAS

FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Special Repair Requirement (Pattern 2)"

.

DTC

Items

(CONSULT-III screen terms)

Diagnostic item is detected when...

Possible cause

C1669

INCOMP LOCK RELEAS

4WAS front actuator error is detected.
(An error is detected in unlock condition.)

The power steering oil 
pressure or the inside 
4WAS front actuator error 
is detected.

 

 

 

 

 

 

 

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