Nissan Sentra manuals

Nissan Sentra Service Manual: Unbalance steering wheel turning force (torque variation)

Nissan Sentra Service Manual / Steering / Steering control system / Symptom diagnosis / Unbalance steering wheel turning force (torque variation)

Description

Unbalance steering wheel turning force (torque variation).

Diagnosis Procedure

1.PERFORM SELF-DIAGNOSIS

With CONSULT


  1. Turn the ignition switch OFF to ON.

  2. Perform EPS self-diagnosis.

Is any DTC detected? YES >> Check the DTC. Refer to STC-14, "DTC Index".

NO >> GO TO 2.

2.CHECK THE ILLUMINATION OF THE EPS WARNING LAMP

Check the EPS warning lamp while the engine is started.

Does the EPS warning lamp turn OFF? YES >> GO TO 3.

NO >> Refer to STC-31, "Diagnosis Procedure".

3.CHECK STEERING COLUMN AND STEERING GEAR

Check the steering column assembly and steering gear assembly.

Is the inspection result normal? YES >> GO TO 4.

NO >> Repair or replace the specific malfunctioning part.

4.CHECK EPS CONTROL UNIT SIGNAL (1)

With CONSULT


  1. Start the engine.

CAUTION:

Never drive the vehicle.

  1. Turn steering wheel from full left stop to full right stop.

  2. Select ASSIST LEVEL in DATA MONITOR in EPS.

Dose the item in DATA MONITOR maintain 100%? YES >> GO TO 7.

NO >> GO TO 5.

5.CHECK EPS CONTROL UNIT SIGNAL (2)

Select BATTERY VOLT in DATA MONITOR in EPS. With CONSULT


Select BATTERY VOLT in DATA MONITOR in EPS.

Does the item in DATA MONITOR indicate 10 V or more? YES >> GO TO 6.

NO >> Perform trouble diagnosis of EPS control unit power supply and ground. Refer to STC-22, "Diagnosis Procedure".

6.CHECK EPS CONTROL UNIT SIGNAL (3)

With CONSULT


  1. Select ASSIST LEVEL in DATA MONITOR in EPS.

  2. Stop the EPS system until the item in DATA MONITOR becomes 100%.

NOTE:

While stopping the EPS system, do not turn steering wheel.

  1. Check that the symptom continues.

Dose the symptom continue? YES >> GO TO 7.

NO >> The assist torque decreases because of protection function. This is not malfunction. Inspection End.

7.Check EPS Control unit signal (4)

With CONSULT


  1. Start the engine.

CAUTION:

Never drive the vehicle.

  1. Turn steering wheel from full left stop to full right stop.

  2. Select TORQUE SENSOR in DATA MONITOR in EPS.

  3. Perform the torque sensor inspection.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 9.

NO >> GO TO 8.

8.CHECK EPS MOTOR

Perform the trouble diagnosis of EPS motor. Refer to STC-27, "Diagnosis Procedure".

Is the inspection result normal? YES >> GO TO 9.

NO >> Repair or replace the specific malfunctioning part.

9.CHECK STEERING WHEEL TURNING FORCE

Check the steering wheel turning force. Refer to ST-5, "Inspection".

Is the inspection result normal? YES >> Inspection End.

NO >> Check the steering wheel turning force for mechanical malfunction. Refer to ST-5, "Inspection".

Unbalance steering wheel turning force and return between right and left
Description Unbalance steering wheel turning force and return between right and left. Diagnosis Procedure 1.CHECK THE ILLUMINATION OF THE EPS WARNING LAMP Check the EPS warning lamp while engine ...

Removal and installation
EPS control unit Exploded View Steering column assembly EPS control unit Bracket plate Front Removal and Installation REMOVAL CAUTION: Disconnect battery negative terminal ...

Other materials:

Basic inspection
Diagnosis and repair workflow Workflow OVERALL SEQUENCE DETAILED FLOW 1.INTERVIEW CUSTOMER Interview the customer to obtain as much information as possible about the conditions and environment under which the malfunction occurred. >> GO TO 2. 2.SYMPTOM CHECK Verify symptoms. ...

Consult function
FUNCTION Diagnostic test mode Function Self Diagnostic Results Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data can be read and erased quickly.* Data Monitor Input/Output data in the ECM can be read. ...

Symptom diagnosis
Squeak and rattle trouble diagnoses Work Flow CUSTOMER INTERVIEW Interview the customer if possible, to determine the conditions that exist when the noise occurs. Use the Diagnostic Worksheet during the interview to document the facts and conditions when the noise occurs and any custom ...

В© 2014-2022 Copyright www.nisentra.com