Description

Steering wheel turning force is heavy or light.

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 4.

NO >> GO TO 2.

2.PERFORM SELF-DIAGNOSIS

With CONSULT-III

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 3.

3.CHECK EPS CONTROL UNIT SIGNAL

With CONSULT-III

1. Start the engine.

CAUTION:
Never drive the vehicle.

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

3. Select “TORQUE SENSOR” in “DATA MONITOR” in “EPS”.

Is the inspection result normal? YES >> GO TO 5.

NO >> GO TO 4.

4.CHECK EPS MOTOR

Perform the trouble diagnosis of EPS motor. Refer to STC-22, "Diagnosis Procedure".

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. Refer to ST-8, "Inspection".

Is the inspection result normal? YES >> INSPECTION END

NO >> Check the steering wheel turning force for mechanical malfunction. Refer to ST-21, "Inspection".