Kia Forte: Motor Driven Power Steering / MDPS Motor

Kia Forte 2019-2021 (BD) Service Manual / Steering System / Motor Driven Power Steering / MDPS Motor

Repair procedures
Replacement
  

When a DTC related to MDPS motor occurs, check the connectors and wiring. If no problem is found, replace the motor.

Be sure to check the last two digits of the constant in the barcode of new MDPS motor before replacing the motor.

Entering incorrect motor constant value may cause a serious problem in the MDPS.

1.

Disconnect the battery negative terminal.

2.

Turn the steering wheel so that the front wheels are facing straight ahead.

3.

Remove the steering column shroud lower panel.

(Refer to Body (Interior and Exterior) - "Steering Column Shroud Panel")

4.

Remove the crash pad lower panel.

(Refer to Body - "Crash pad lower panel")

5.

Disconnect the MDPS connector (A).

6.

Disconnect all connectors connected to the steering column.

7.

Loosen the steering column lower mounting bolt (A).

Tightening torque :

53.9 - 58.8 N·m (5.5 - 6.0 kgf·m, 39.8 - 43.4 lb·ft)

8.

Loosen the steering column upper mounting nuts (A) and then disconnect the steering column & shaft.

Tightening torque :

24.5 - 29.4 N·m (2.5 - 3.0 kgf·m, 18.1 - 21.7 lb·ft)

9.

Loosen the bolts and then remove the MDPS motor (A).

Tightening torque :

7.8 - 11.8 N·m (0.8 - 1.2 kgf·m, 5.8 - 8.7 lb·ft)

  

Be careful not to damage the MDPS motor & ECU.

If shock the motor, may occurs a noise caused by the bearing damage of motor inside.

Be sure to check the last two digits of the constant in the barcode of new MDPS motor before replacing the motor.

10.

Perform the "Inputting the motor constant value" by KDS following in the order below.

(1)

Connect self-diagnosis connector (16pins) located under the driver side crash pad to self-diagnosis device, and then turn the self-diagnosis device after key is ON.

(2)

Select the "vehicle model" and "Motor Driven Power Steering" on KDS vehicle selection screen.

(3)

Select the "Part replacement (Power steering Motor)" on KDS screen, then select OK.

(4)

Proceed with the test according to the screen instructions.

  

Entering incorrect motor constant value may cause a serious problem in the MDPS.

11.

Perform the "Steering Angle Sensor (SAS) Calibration" and "Set the steering feel torque to zero".

12.

Turn off the IGN switch and wait for 10 seconds or more. Then check the operation after starting the engine.

Diagnosis with KDS

Steering Angle Sensor (SAS) Calibration and Set the steering feel torque to zero

  

Check that the battery is fully charged before "Steering Angle Sensor (SAS) Calibration".

Be careful not to disconnect any cables connected to the vehicle or scan tool during "Steering Angle Sensor (SAS) Calibration".

After completing the "Steering Angle Sensor (SAS) Calibration", switch off the ignition and wait for several seconds. Then, start the engine to confirm normal operation of the vehicle.

1.

Connect self-diagnosis connector (16pins) located under the driver side crash pad to self-diagnosis device, and then turn the self-diagnosis device after key is ON.

2.

Select the "vehicle model" and "Motor Driven Power Steering" on KDS vehicle selection screen.

3.

Select the "Steering Angle Sensor (SAS) Calibration" on KDS screen, then select OK.

4.

Proceed with the test according to the screen instructions.

5.

Select the "Set the steering feel torque to zero" on KDS screen, then select OK.

6.

Proceed with the test according to the screen instructions.

7.

Remove the DTC.

8.

Turn off the IG switch and wait for 10 seconds or more before starting the engine. And then make sure that MDPS works properly.

Motor Driven Power Steering
Description and operation Description MDPS (Motor Driven Power Steering) system uses an electric motor to assist the steering force and it is an engine operation independent steering ...

MDPS Control Unit
Repair procedures Replacement    • If a DTC occurs in the ECU, check the connectors and wiring ...

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