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Home >> Kia >> 2019 >> Niro Plug-In Hybrid EX >> Repair and Diagnosis >> Steering >> Steering Column >> Motor Driven Power Steering System (PHEV) >> Repair Procedures >> A/S Repair Procedures >> MDPS System A/S Workflow

MDPS System A/S Workflow

G12696934Courtesy of KIA MOTORS AMERICA, INC.
  1. Checking Connectors and Wiring 
    1. Checking Connectors and Wiring.

      Check for damage, push-back, or improper connection in each connector and wiring.

      1. Check the wiring on the vehicle side.
        • Check for open/short - circuit due to faulty connection, damage, or foreign substance.
        G12696935Courtesy of KIA MOTORS AMERICA, INC.
      2. Check the wiring on the ECU side (motor 3 - phase power).
        • Check for open/short - circuit due to faulty connection, damage, or foreign substance.
        G12696936Courtesy of KIA MOTORS AMERICA, INC.
      3. Check the motor connector.
        • Terminal Expansion and damage.
        G12696937Courtesy of KIA MOTORS AMERICA, INC.
        NOTE:
        • Must be replaced the MDPS motor if occur terminal expansion and damage.
      4. Check the motor wiring.
        G12696938Courtesy of KIA MOTORS AMERICA, INC.
        NOTE:
        • Must be replaced the MDPS motor if occur damage or problem.
  2. Inspection Items per DTC 
    Item DTC Description Inspection Service action
    CAN Line C1611 CAN TIME OUT EMS
    1. Check the GDS
    2. Check connector tightening.
    3. Inspection the ECU CAN connector
    4. Check MDPS vehicle grounding status
    		 EMS CAN line inspection
    C1616 CAN BUS OFF Check the chassis can line
    C1622 Vehicle speed signal error EMS (Engine ECU) inspection
    Torque sensor C1290 Torque sensor signal error Inspection after DTC clear. Check connector tightening. Replace column & housing if phenomenon persists
    C1112 Torque sensor supply voltage error Check torque sensor and ECU connection connector. Replace ECU if phenomenon persists
    ECU C1604 ECU hardware error Inspection the ECU connector after Clear DTC Replace ECU if phenomenon persists
    ECU C1705 EPS Module pre-charge circuit malfunction Inspection the ECU connector after Clear DTC. Replace ECU if phenomenon persists
    Motor C2400 Motor signal error Inspection the Motor connector after Clear DTC. Replace Motor if phenomenon persists
    Motor C2401 Motor position sensor error Inspection the Motor connector after Clear DTC. Replace Motor if phenomenon persists
    ECU/Motor C2412 Motor current error Inspection the Motor/ECU connector after Clear DTC. First ECU replacement Replace Motor if phenomenon persists
    Steering angle sensor C1259 Steering Angle sensor error Steering angle reset after DTC dear Check connector tightening. Replace column & housing if phenomenon persists
    Battery C1102 Battery voltage low Check battery voltage status Battery voltage charging
    Cooperative control C1696 SPAS signal error SPAS Inspection Clear DTC.
    C1697
    Cooperative control C1612 TCU signal error TCU Inspection Clear DTC.
    C1646
    Cooperative control C1628 Cluster signal error Cluster Inspection Clear DTC.
    C1656
    Cooperative control C1692 VSM signal error VSM Inspection Clear DTC.
    C1693
    ABS C1260 Steering angle signal error Checking after steering angle reset If the C1259 code does not occur, check the CAN line. Steering angle reset Clear DTC.

    Noise/malfunction Repair procedures 

  3. Noise/malfunction Inspection 
    Symptom Fault description and inspection method Countermeasure
    Noise/rattle
    1. Noise generated near the MDPS column & housing.
      • Remove the surrounding parts and check whether the same noise occurs.
    • Replace the partial component of the column and housing
    • Replace the motor if the noise occurs
    Noise/rattle
    1. Check the handle and surrounding fastening parts.
      • Check DAB wiring arrangement, DAB, clock spring, multi-function switch, etc.
    		 Check the noise of the relevant part
    • Perform a separate inspection.
    1. Check where the C-MDPS is installed.
      • Loosen the cowl fastening bolt and reassemble.

        (including the through bolt fixing the lower part of the C-MDPS)

    		 Check the installation of the cowl
    1. Check the fastening area of the universal joint bolt.
      • Completely remove the universal joint and check whether the noise occurs after the reinstallation.
    		 Fasten with a new bolt if the universal joint bolt is worn
    1. Check free playing area of the column when steering while the vehicle is stopped.
      • Check the main wiring connected to the MDPS and column/interference around the shroud/friction
    		 Keep spaces between the surrounding parts
    • Check free play around the wiring and column and inspect interference.
  4. Cautions to be taken while servicing 
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