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Home >> Kia >> 2021 >> Niro Plug-In Hybrid LXS >> Repair and Diagnosis (Single Page) >> Steering >> Steering Column >> Motor Driven Power Steering System (PHEV) >> MDPS Control Unit >> 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 "Motor Driven Power Steering" 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.
      G13349579Courtesy of KIA MOTORS AMERICA, INC.
    4. Proceed with the test according to the screen instructions.
    G13349580Courtesy of KIA MOTORS AMERICA, INC.
    G13349581Courtesy of KIA MOTORS AMERICA, INC.
    G13349582Courtesy of KIA MOTORS AMERICA, INC.
    G13349583Courtesy of KIA MOTORS AMERICA, INC.
    G13349584Courtesy of KIA MOTORS AMERICA, INC.
    NOTE: 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. Remove the knee airbag (KAB) module.

    (Refer to Restraint - "KNEE AIRBAG (KAB) MODULE ")

  5. Disconnect the MDPS ECU connectors (A).
    G13349585Courtesy of KIA MOTORS AMERICA, INC.
    G13349586Courtesy of KIA MOTORS AMERICA, INC.
  6. 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)

    G13349587Courtesy of KIA MOTORS AMERICA, INC.
  7. Install in the reverse order of removal.
  8. Perform the "Motor Driven Power Steering" 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.
      G13349588Courtesy of KIA MOTORS AMERICA, INC.
    4. Proceed with the test according to the screen instructions.
    G13349589Courtesy of KIA MOTORS AMERICA, INC.
    G13349590Courtesy of KIA MOTORS AMERICA, INC.
    G13349591Courtesy of KIA MOTORS AMERICA, INC.
    G13349592Courtesy of KIA MOTORS AMERICA, INC.
    G13349593Courtesy of KIA MOTORS AMERICA, INC.
  9. Perform the "STEERING ANGLE SENSOR (SAS) CALIBRATION " and "Set the steering feel torque to zero".
  10. Turn off the IGN switch and wait for 10 seconds or more. Then check the operation after starting the engine.
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