Steering System Vibration And Noise

STEERING SYSTEM VIBRATION AND NOISE





Description
Vibration or noise occurs in the steering wheel while driving the vehicle.

NOTE:
Vibration or noise occurs in the steering wheel in the following conditions. (4WAS system is not malfunction.)
- 4WAS system starts and ends (when the engine speed is ON-OFF).
- System protection mode
- When steering frequently
- When driving on a rough road
- When the assist of power steering is not sufficient
- When the battery voltage is weak




Diagnosis Procedure
1.CHECK 4WAS SYSTEM
With CONSULT-III
1. Start the engine.

CAUTION:
Never drive the vehicle.
2. Check "OVRLD JDG FLG", "ACT PRTCT FLG", "ECU PRTCT FLG","LOW VOLT FLG", "HIGH VOLT
FLG", "EX OPERAT" items on "DATA MONITOR" for 4WAS(FRONT).
Does all items on "DATA MONITOR" indicate "Off"?
YES - INSPECTION END (Vibration and sound occurs in 4WAS system protection function mode. This is normal.)
NO - GO TO 2.
2.STOP 4WAS FRONT ACTUATOR CONTROL
1. Turn the ignition switch OFF.
2. Disconnect 4WAS front actuator harness connector.

CAUTION:
Disconnect 4WAS front actuator harness connector 10 minutes after turning the ignition switch
OFF.
3. Drive the vehicle for a period of time. Check the symptom.

CAUTION:
Erase the self-diagnosis memory after the inspection is completed to detect 4WAS front control unit DTC "C1661". [Erase the self diagnosis memory of 4WAS main control unit, ABS actuator and electric unit (control unit) and ADAS control unit simultaneously.]
Does symptom not occur?
YES - Replace 4WAS front actuator. Removal And Installation.
NO - Perform the steering system. Service and Repair and Procedures.