Steering Wheel Turning Force Is Heavy Or Light

STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT

Description

Steering wheel turning force is heavy or light.


Diagnosis Procedure


1. PERFORM SELF-DIAGNOSIS

With CONSULT
1.Turn the power switch OFF to ON.
2.Perform "EPS" self-diagnosis.
Is any DTC detected?
YES- Check the DTC.
NO- GO TO 2.

2. CHECK THE ILLUMINATION OF THE EPS WARNING LAMP

Check that the EPS warning lamp turns ON when power switch turns ON. Then, EPS warning lamp turns OFF
after the vehicle is READY state.
Is the inspection result normal?
YES- GO TO 3.
NO- Perform trouble diagnosis of EPS warning lamp. Refer to "Diagnosis Procedure" EPS Warning Lamp.

3. CHECK EPS CONTROL UNIT SIGNAL (1)

With CONSULT
1.Set the vehicle to READY.
2.Select "ASSIST LEVEL" in "DATA MONITOR" in "EPS".
Dose the item in "DATA MONITOR" indicate "100%"?
YES- GO TO 6.
NO- GO TO 4.

4. CHECK EPS CONTROL UNIT SIGNAL (2)

With CONSULT
Select "BATTERY VOLT" in "DATA MONITOR" in "EPS".
Dose the item in "DATA MONITOR" indicate "10.5 V" or more?
YES- GO TO 5.
NO- Perform trouble diagnosis of EPS control unit power supply and ground. Refer to "Diagnosis Procedure" C1601.

5. CHECK EPS CONTROL UNIT SIGNAL (3)

With CONSULT
1.Select "C/U TEMP" in "DATA MONITOR" in "EPS".
2.Stop the EPS system until the item in "DATA MONITOR" becomes "85�C (185�F)" or less.
NOTE:
While stopping the EPS system, do not turn steering wheel.
3.Check that the symptom continues.
Dose the symptom continue?
YES- GO TO 6.
NO- The assist torque decreases because of protection function. This is not malfunction. INSPECTION END

6. CHECK EPS CONTROL UNIT SIGNAL (4)

With CONSULT
1.Set the vehicle to READY.

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 8.
NO- GO TO 7.

7. CHECK EPS MOTOR

Perform the trouble diagnosis of EPS motor. Refer to "Diagnosis Procedure" C1606.
Is the inspection result normal?
YES- GO TO 8.
NO- Repair or replace the specific malfunctioning part.

8. CHECK STEERING WHEEL TURNING FORCE

Check the steering wheel turning force. Refer to "Inspection" With Heated Steering Wheel.
Is the inspection result normal?
YES- INSPECTION END
NO- Check the steering wheel turning force for mechanical malfunction. Refer to "Inspection" With Heated Steering Wheel.