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Home >> Kia >> 2021 >> Seltos S Turbo >> Repair and Diagnosis >> Steering >> Steering Column >> Motor Driven Power Steering System >> MDPS Control Unit (ECU) >> Repair Procedures >> Replacement
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Repair Procedures: Replacement

NOTE:
  • 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 ignition 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.
      G13481476Courtesy of KIA MOTORS AMERICA, INC.
    4. Proceed with the test according to the screen instructions.
    G13481477Courtesy of KIA MOTORS AMERICA, INC.
    G13481478Courtesy of KIA MOTORS AMERICA, INC.
    G13481479Courtesy of KIA MOTORS AMERICA, INC.
    G13481480Courtesy of KIA MOTORS AMERICA, INC.
    G13481481Courtesy of KIA MOTORS AMERICA, INC.
  2. Turn the ignition OFF and disconnect the battery negative (-) cable.
    WARNING: Disconnect the battery negative cable from the battery and then wait for at least 30 seconds.
  3. Remove the steering column shroud upper panel.

    (Refer to Body - "STEERING COLUMN SHROUD PANEL ")

  4. Remove the crash pad lower panel.

    (Refer to Body - "CRASH PAD LOWER PANEL ")

  5. Disconnect the MDPS ECU connectors (A).
    G13481482Courtesy of KIA MOTORS AMERICA, INC.
  6. Loosen the mounting nut (A) and bolt (B) and leave the steering column and EPS unit assembly lie on the vehicle's floor.

    Tightening torque 

    1. 25.0 - 29.4 N.m (2.5 - 3.0 kgf.m, 14.5 - 21.7 lb-ft)
    2. 53.9 - 58.8 N.m (5.5 - 6.0 kgf.m, 39.8 - 43.4 lb-ft)
    G13481483Courtesy of KIA MOTORS AMERICA, INC.
    G13481484Courtesy of KIA MOTORS AMERICA, INC.
  7. Loosen the bolts and then remove the MDPS ECU (A).
    G13481485Courtesy of KIA MOTORS AMERICA, INC.
  8. Install in the reverse order of removal.
  9. 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 ignition 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.
      G13481486Courtesy of KIA MOTORS AMERICA, INC.
    4. Proceed with the test according to the screen instructions.
    G13481487Courtesy of KIA MOTORS AMERICA, INC.
    G13481488Courtesy of KIA MOTORS AMERICA, INC.
    G13481489Courtesy of KIA MOTORS AMERICA, INC.
    G13481490Courtesy of KIA MOTORS AMERICA, INC.
    G13481491Courtesy of KIA MOTORS AMERICA, INC.
  10. Perform the "STEERING ANGLE SENSOR (SAS) CALIBRATION" AND "SET THE STEERING FEEL TORQUE TO ZERO ".
  11. Turn off the ignition and wait for 10 seconds or more. Then check the operation after starting the engine.
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