POWER STEERING SYSTEM, Diagnostic DTC:C1582

DTC Code DTC Name
C1582 Assist Map Number Mismatch

DESCRIPTION

When an incorrect ECM, AVS ECU (absorber control ECU) (w/ Adaptive Variable Suspension System) or VGRS ECU (front steering control ECU) (w/ Variable Gear Ratio Steering System) is installed after the assist map has been written to the power steering ECU assembly, then DTC C1582 is stored because the data does not match the vehicle specifications.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
C1582 Assist Map Number Mismatch Assist map number mismatch

  • CAN communication system

  • Incorrect ECM

  • Incorrect AVS ECU (absorber control ECU) (w/ Adaptive Variable Suspension System)

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

  • Power steering ECU assembly

 EPS warning light: Does not come 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

Tech Tips

Related parts store information necessary for assist map writing.

Related Part:


  • ECM

  • AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

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

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check for DTCs.

      Click here

      Result
      Result Proceed to
      CAN communication system DTCs are not output. A
      CAN communication system DTCs are output. B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK RELATED PART


    1. Check if any of the parts listed below have been replaced with an incorrect part in the past.

      Related Part ECM
      AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)
      VGRS ECU (Front steering control ECU) (w/ Variable Gear Ratio Steering System)

      Note

      When removing a related part to check it, be sure to follow the appropriate procedures and precautions.


      • ECM

        for 8AR-FTS: Click here

        for 2GR-FSE: Click here

      • AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

        Click here

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

        Click here

    2. When DTC C1582 is output and parts have not been exchanged, replace the power steering ECU assembly as it may have an internal malfunction.

      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

      Result
      Result Proceed to
      Any of the related parts has an incorrect part number. A
      All of the related parts have the correct part number, or a related part and power steering ECU assembly have not been replaced. B

    B

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

    A

  3. REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER


    1. Replace the related parts with ones that have the correct part number.


      • ECM

        for 8AR-FTS: Click here

        for 2GR-FSE: Click here

      • AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

        Click here

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

        Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK FOR DTC


    1. Check for DTCs.

      Click here


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

    A

    END

    B

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