Kia Forte: Motor Driven Power Steering / MDPS Control Unit

Kia Forte 2019-2020 (BD) Service Manual / Steering System / Motor Driven Power Steering / MDPS Control Unit

Repair procedures
Replacement
  

If a DTC occurs in the ECU, check the connectors and wiring. If no problem is found, replace the ECU.

Before replacing the MDPS ECU, use the diagnostic device to read the settings of the old ECU

1.

Perform the "ECU data backup" 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 ECU)" on KDS screen, then select OK.

(4)

Proceed with the test according to the screen instructions.

  

If a DTC occurs in the ECU, check the connectors and wiring. If no problem is found, replace the ECU.

2.

Disconnect the battery negative terminal.

3.

Remove the crash pad lower panel.

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

4.

Disconnect the MDPS ECU connectors (A).

5.

Loosen the mounting bolts (A) and then remove the MDPS ECU (B).

Tightening torque :

19.6 - 23.5 N·m (2.0 - 2.4 kgf·m, 14.5 - 17.4 lb·ft)

6.

Install in the reverse order of removal.

7.

Perform the "ECU data restore" 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 ECU)" on KDS screen, then select OK.

(4)

Proceed with the test according to the screen instructions.

8.

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

9.

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.

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