Unbalance Steering Wheel Turning Force (Torque Variation)

UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)





Description
Unbalance steering wheel turning force (torque variation).




Diagnosis Procedure
1.CHECK THE ILLUMINATION OF THE EPS WARNING LAMP
Check that the EPS warning lamp turns ON when ignition switch turns ON. Then, EPS warning lamp turns
OFF after the engine is started.
Is the inspection result normal?
YES - GO TO 2.
NO - EPS Warning Lamp Does Not Turn OFF.
2.CHECK STEERING COLUMN AND STEERING GEAR
Check the steering column assembly and steering gear assembly.
- Steering column assembly. Service and Repair.
- Steering gear assembly. Disassembly and Assembly.
Is the inspection result normal?
YES - GO TO 3.
NO - Repair or replace the specific malfunctioning part.
3.CHECK EPS CONTROL UNIT SIGNAL
With CONSULT-III
1. Start the engine.

CAUTION:
Stop the vehicle.
2. Turn steering wheel from full left stop to full right stop.
3. Select "TORQUE SENSOR" of "DATA MONITOR" for EPS control unit.





Is the inspection result normal?
YES - GO TO 5.
NO - GO TO 4.
4.CHECK EPS MOTOR
Perform the trouble diagnosis of EPS motor. C1606.
Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace the specific malfunctioning part.
5.CHECK STEERING WHEEL TURNING FORCE
Check the steering wheel turning force. Component Tests and General Diagnostics.
Is the inspection result normal?
YES - Inspection End.
NO - Check the steering wheel turning force for mechanical malfunction. Component Tests and General Diagnostics.