Nissan Murano: Steering Control System :: Symptom Diagnosis / Steering Wheel Turning Force Is Heavy or Light

Diagnosis Procedure

SELF DIAGNOSTIC RESULT

CONSULT

Select "Self Diagnostic Result" mode of "EPS/DAST 3".

Is a malfunctioning system displayed?

Check malfunctioning system. Refer to DTC Index.

GO TO 2.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (1)

CONSULT

1. Start the engine.

   CAUTION:

   Never drive the Nissan Murano vehicle.

2. Turn the steering wheel until it stops.

3. Select “MTR ASSIST” in “Data Monitor” mode of "EPS/DAST 3".

Is the display value “100%”?

GO TO 4.

GO TO 3.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (2)

CONSULT

1. Select “C/U TEMP” and “C/U TEMP A” in “Data Monitor” mode of "EPS/DAST 3".

2. Stop the system until the “Data Monitor” mode display value drops to 194°F (90°C) or less.

3. Check whether symptom continues.

Does symptom continue?

GO TO 4.

This occurs because the protection function lowers the assist force. It is not a system malfunction. Inspection End.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (3)

CONSULT

1. Turn the steering wheel to the straight-ahead position. (There is no steering force.)

2. Select “BATTERY VOLT” in “Data Monitor” mode of "EPS/DAST 3".

Is the display value 10.5 V or more?

GO TO 5.

Check the battery power system. Refer to Diagnosis Procedure.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (4)

CONSULT

Select “ESTM VHCL SPD” in “Data Monitor” mode of "EPS/DAST 3".

*: This may not agree with the speedometer indication immediately after the ignition switch is placed ON. This is not a malfunction.

Is the check result normal?

GO TO 6.

Check the combination meter and ABS actuator and electric unit (control unit). Refer to CONSULT Function (METER/M&A) and CONSULT Function.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (5)

CONSULT

Select “STR ANG SPD” in “Data Monitor” mode of "EPS/DAST 3".

Is the check result normal?

GO TO 7.

Check the steering angle sensor. Refer to Diagnosis Procedure.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (6)

CONSULT

Select “ENGINE STATUS” in “Data Monitor” mode of "EPS/DAST 3".

Is the display value “RUN”?

GO TO 8.

Check the ECM. Refer to CONSULT Function.

CHECK THE STEERING FORCE

Check the steering force. Refer to Inspection.

Is the check result normal?

Inspection End.

It is possible that there is a mechanical malfunction. Check the steering system.