Steering Wheel Turning Force Is Heavy or Light

STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT

Diagnosis Procedure


1. PERFORM SELF-DIAGNOSIS

With CONSULT
Perform "EPS" self-diagnosis.
Is a malfunctioning system displayed?
YES- Check malfunctioning system. Refer to "DTC Index" A L L Diagnostic Trouble Codes ( DTC ).
NO- GO TO 2.

2. CHECK THE POWER STEERING CONTROL MODULE SIGNAL (1)

With CONSULT
1.Start the engine.

CAUTION:
Never drive the vehicle.
2.Turn the steering wheel until it stops.
3.Select "MTR ASSIST" in "DATA MONITOR" of "EPS".
Is the display value "100%"?
YES- GO TO 4.
NO- GO TO 3.

3. CHECK THE POWER STEERING CONTROL MODULE SIGNAL (2)

With CONSULT
1.Select "C/U TEMP" and "C/U TEMP A" in "DATA MONITOR" of "EPS".
2.Stop the system until the DATA MONITOR display value drops to "90�C (194�F)" or less.
3.Check whether symptom continues.
Did symptom continue?
YES- GO TO 4.
NO- This occurs because the protection function lowers the assist force. It is not a system malfunction.
Inspection End.

4. CHECK THE POWER STEERING CONTROL MODULE SIGNAL (3)

With CONSULT
1.Turn the steering wheel to the straight-ahead position. (There is no steering force)
2.Select "BATTERY VOLT" in "DATA MONITOR" of "EPS".
Is the display value "10.5 V" or more?
YES- GO TO 5.
NO- Check the battery power system. Refer to "Diagnosis Procedure" C1601.

5. CHECK THE POWER STEERING CONTROL MODULE SIGNAL (4)

With CONSULT
Select "ESTM VHCL SPD" in "DATA MONITOR" of "EPS".





*: This may not agree with the speedometer indication immediately after the ignition switch is turned ON. This is not a malfunction.
Is the check result normal?
YES- GO TO 6.
NO- Check the combination meter, ABS actuator and electric unit (control unit). Refer to "CONSULT Function (METER/M&A)" Consult Function and "CONSULT Function" Scan Tool Testing and Procedures.
Revision: March 20122013 Infiniti JX

6. CHECK THE POWER STEERING CONTROL MODULE SIGNAL (5)

With CONSULT
Select "STR ANG SPD" in "DATA MONITOR" of "EPS".





Is the check result normal?
YES- GO TO 7.
NO- Check the steering angle sensor. Refer to "Diagnosis Procedure" C1143.

7. CHECK THE POWER STEERING CONTROL MODULE SIGNAL (6)

With CONSULT
Select "ENGINE STATUS" in "DATA MONITOR" of "EPS".
Is the display value "RUN"?
YES- GO TO 8.
NO- Check the ECM. Refer to "CONSULT Function" Consult Function.

8. CHECK THE STEERING FORCE

Check the steering force. Refer to "Diagnosis Procedure" Unbalance Steering Wheel Turning Force and Return Between Right and Left.
Is the check result normal?
YES- Inspection End.
NO- It is possible that there is a mechanical malfunction. Check the steering system.
Revision: March 20122013 Infiniti JX