POWER STEERING SYSTEM, Diagnostic DTC:C1548

DTC Code DTC Name
C1548 Active Steering Control Malfunction

DESCRIPTION

The power steering ECU assembly sends and receives steering cooperative control information to and from the skid control ECU (brake actuator assembly) and VGRS ECU (front steering control ECU) via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
C1548 Active Steering Control Malfunction There is a steering angle sensor recognition error.

  • Brake control system

  • VGRS ECU (Front steering control ECU) (w/ Variable Gear Ratio Steering System)

  • Skid control ECU (Brake actuator assembly)

  • Power steering ECU assembly

 EPS warning light: Comes on -

CAUTION / NOTICE / HINT

Note


  • If the power steering ECU assembly has been replaced, perform assist map writing, rotation angle sensor initialization and torque sensor zero point calibration.

    Click here

  • If the VGRS ECU (front steering control ECU) has been replaced, perform actuator angle neutral point calibration and initialization for the variable gear ratio steering system. (w/ Variable Gear Ratio Steering System)

    Click here

PROCEDURE


  1. CHECK BRAKE CONTROL SYSTEM


    1. Using the GTS, check for DTCs and confirm that there are no malfunctions in the brake control system.

      Click here


      Chassis > EMPS > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    B

    GO TO BRAKE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    A

  2. CHECK VARIABLE GEAR RATIO STEERING SYSTEM


    1. Using the GTS, check for DTCs and confirm that there are no malfunctions in the variable gear ratio steering system.


      Chassis > VGRS > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    B

    GO TO VARIABLE GEAR RATIO STEERING SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    A

  3. CHECK POWER STEERING SYSTEM


    1. Check for DTCs.

      Click here


      Chassis > EMPS > Trouble Codes
      Result
      Result Proceed to
      DTCs other than C1548 are not output. A
      DTCs other than C1548 are output. B

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  4. REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)


    1. Replace the skid control ECU (brake actuator assembly).

      for LHD: Click here

      for RHD: Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. RECONFIRM DTC


    1. Clear the DTCs.

      Click here


      Chassis > EMPS > Clear DTCs

    2. Check for DTCs.

      Click here


      Chassis > EMPS > Clear DTCs
      Result
      Result Proceed to
      DTCs are output. A
      DTCs are not output. B

    B

    END

    A

  6. REPLACE VGRS ECU (FRONT STEERING CONTROL ECU)


    1. Replace the VGRS ECU (front steering control ECU).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  7. RECONFIRM DTC


    1. Clear the DTCs.

      Click here


      Chassis > EMPS > Clear DTCs

    2. Check for DTCs.

      Click here


      Chassis > EMPS > Trouble Codes
      Result
      Result Proceed to
      DTCs are output. A
      DTCs are not output. B

    A

    REPLACE POWER STEERING ECU ASSEMBLY for LHD: Click here
    REPLACE POWER STEERING ECU ASSEMBLY for RHD: Click here

    B

    END