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Home >> Kia >> 2020 >> Cadenza Technology >> Repair and Diagnosis >> Steering >> Steering Column >> Motor Driven Power Steering System >> 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 "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.
      G13404181Courtesy of KIA MOTORS AMERICA, INC.
    4. Proceed with the test according to the screen instructions.
      G13404182Courtesy of KIA MOTORS AMERICA, INC.
      G13404183Courtesy of KIA MOTORS AMERICA, INC.
      G13404184Courtesy of KIA MOTORS AMERICA, INC.
      G13404185Courtesy of KIA MOTORS AMERICA, INC.
      G13404186Courtesy 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 cable.
  3. Remove the Steering Column Shroud Panel.

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

  4. Remove the crash lower panel.

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

  5. Remove the knee airbag.

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

  6. Disconnect all connectors from the steering column.
  7. Loosen the steering column nuts.

    Tightening torque: 

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

    G13404187Courtesy of KIA MOTORS AMERICA, INC.
  8. Remove the brake switch.

    (Refer to Brake System - "STOP LAMP SWITCH ")

  9. Loosen the steering column bolt and then remove the steering column.

    Tightening torque: 

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

    G13404188Courtesy of KIA MOTORS AMERICA, INC.
  10. Disconnect the MDPS ECU connector (A).
    G13404189Courtesy of KIA MOTORS AMERICA, INC.
  11. Loosen the bolts (A) and then remove the MDPS ECU (B).
    G13404190Courtesy of KIA MOTORS AMERICA, INC.
  12. Loosen the MDPS ECU bracket bolts (A) and then remove the MDPS ECU bracket.
    G13404191Courtesy of KIA MOTORS AMERICA, INC.
  13. Install in the reverse order of removal.
  14. 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.
      G13404192Courtesy of KIA MOTORS AMERICA, INC.
    4. Proceed with the test according to the screen instructions.
      G13404193Courtesy of KIA MOTORS AMERICA, INC.
      G13404194Courtesy of KIA MOTORS AMERICA, INC.
      G13404195Courtesy of KIA MOTORS AMERICA, INC.
      G13404196Courtesy of KIA MOTORS AMERICA, INC.
      G13404197Courtesy of KIA MOTORS AMERICA, INC.
  15. Perform the "STEERING ANGLE SENSOR (SAS) CALIBRATION AND SET THE STEERING FEEL TORQUE TO ZERO ".
  16. Turn off the IGN switch and wait for 10 seconds or more. Then check the operation after starting the engine.
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