Infiniti G35 (V35) Sedan. Manual - part 1283

 

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Infiniti G35 (V35) Sedan. Manual - part 1283

 

 

STC-22

< SYMPTOM DIAGNOSIS >

[WITHOUT 4WAS]

UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)

SYMPTOM DIAGNOSIS

UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIA-
TION)

Description

INFOID:0000000000958721

• Hard steering when fully turning the steering wheel.
• Light steering when driving at a high speed.

Diagnosis Procedure

INFOID:0000000000958722

1.

CHECK SYSTEM FOR POWER SUPPLY AND GROUND

Perform trouble diagnosis for power supply and ground. Refer to 

STC-10, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace damaged parts.

2.

CHECK SYSTEM FOR VEHICLE SPEED SIGNAL

Perform trouble diagnosis for vehicle speed signal. Refer to 

STC-15, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK SYSTEM FOR ENGINE SPEED SIGNAL

Perform trouble diagnosis for engine speed signal. Refer to 

STC-13, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK SYSTEM FOR POWER STEERING SOLENOID VALVE

Perform trouble diagnosis for power steering solenoid valve. Refer to 

STC-11, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

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

ST-3, "NVH Troubleshooting

Chart"

.

NO

>> Repair or replace damaged parts.

PRECAUTIONS

STC-23

< PRECAUTION >

[WITHOUT 4WAS]

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

INFOID:0000000000958723

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SRS section.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.

Precaution Necessary for Steering Wheel Rotation after Battery Disconnect

INFOID:0000000000958724

NOTE:
• Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-

tion, then disconnect both battery cables.

• After finishing work, confirm that all control unit connectors are connected properly, then re-connect both

battery cables.

• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.

If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.

This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.

OPERATION PROCEDURE

1.

Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.

2.

Carry the Intelligent Key or insert it to the key slot and turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)

3.

Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.

4.

Perform the necessary repair operation.

5.

When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)

6.

Perform self-diagnosis check of all control units using CONSULT-III.

STC-24

< ON-VEHICLE REPAIR >

[WITHOUT 4WAS]

POWER STEERING CONTROL UNIT

ON-VEHICLE REPAIR

POWER STEERING CONTROL UNIT

Exploded View

INFOID:0000000000958725

Removal and Installation

INFOID:0000000000958726

REMOVAL

1.

Remove the glove box assembly. Refer to 

IP-11, "Exploded View"

.

2.

Remove the power steering control unit screws.

3.

Remove the power steering control unit (1).

4.

Disconnect power steering control unit connector.

INSTALLATION

Install in the reverse order of removal.

1.

Power steering control unit

: Vehicle front

JSGIA0129ZZ

JSGIA0130ZZ

DIAGNOSIS AND REPAIR WORKFLOW

STC-25

< BASIC INSPECTION >

[WITH 4WAS]

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000000958727

DETAILED FLOW

1.

INTERVIEW FROM THE CUSTOMER

It is also important to clarify customer complaints before inspection. First of all, reproduce symptoms, and
understand them fully. Ask customer about his/her complaints carefully. In some cases, it will be necessary to
check symptoms by driving vehicle with customer.

CAUTION:

Customers are not professional. It is dangerous to make an easy guess like “maybe the customer
means that...,” or “maybe the customer mentions this symptom”.

>> GO TO 2.

2.

CHECK SYMPTOM

Start the engine.

CAUTION:

Stop the vehicle.

Does 4WAS warning lamp turn ON?

YES

>> GO TO 3.

NO

>> GO TO 6.

3.

PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)

 With CONSULT-III

Perform 4WAS main control unit self-diagnosis.

Is any DTC detected other than “C1930” or “C1931”?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

PERFORM TROUBLE DIAGNOSIS (4WAS MAIN CONTROL UNIT)

 With CONSULT-III

1.

Check the error system detected from the self-diagnosis.

CAUTION:

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

2.

Erase 4WAS main control unit self-diagnosis memory.

CAUTION:

• Never erase the self-diagnosis result (record) history when replacing 4WAS main control unit.
• 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).

>> GO TO 5.

5.

PERFORM SELF-DIAGNOSIS (4WAS FRONT CONTROL UNIT AND 4WAS MAIN CONTROL UNIT)

 With CONSULT-III

1.

Perform 4WAS front control unit self-diagnosis.

2.

Check the error system detected from the self-diagnosis.

CAUTION:

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

3.

Erase 4WAS front control unit self-diagnosis memory.

CAUTION:

• Never erase the self-diagnosis result (record) history when replacing 4WAS front control unit.
• 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).

4.

Perform 4WAS main control unit self-diagnosis.

 

 

 

 

 

 

 

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