POWER STEERING SYSTEM, Diagnostic DTC:C1582/26

DTC Code DTC Name
C1582/26 Assist Map Number Mismatch

DESCRIPTION

When an incorrect ECM, an incorrect brake actuator assembly or an incorrect main body ECU is installed after the assist map has been written in the power steering ECU assembly, then DTC C1582/26 is stored because the data does not match the vehicle specifications.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition
C1582/26 Assist Map Number Mismatch Assist map number mismatch

  • CAN communication system

  • Incorrect ECM

  • Incorrect skid control ECU (brake actuator assembly)

  • Incorrect main body ECU (multiplex network body ECU)

  • Power steering ECU assembly

 Off Assist map written

CAUTION / NOTICE / HINT

Note

If the power steering ECU assembly has been replaced, perform assist map writing Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check for DTCs.

      Click here


      Chassis > EMPS > Trouble Codes
      Result
      Proceed to
      DTC is not output
      DTC is output

    DTC is output

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) for LHD: Click here
    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) for RHD: Click here

    DTC is not output

  2. CHECK RELATED PART (ECM, MAIN BODY ECU AND SKID CONTROL ECU)


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

      Related Part ECM
      Main body ECU (multiplex network body ECU)
      Skid control ECU (brake actuator assembly)

      Note

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


      • Refer to the following procedures to remove the ECM (for 1AD-FTV).

        Click here

      • Refer to the following procedures to remove the ECM (for 2AD-FHV).

        Click here

      • Refer to the following procedures to remove the ECM (for 2AD-FTV).

        Click here

      • Refer to the following procedures to remove the ECM (for 2AR-FE).

        Click here

      • Refer to the following procedures to remove the ECM (for 3ZR-FAE).

        Click here

      • Refer to the following procedures to remove the ECM (for 3ZR-FE).

        Click here

      • Refer to the following procedures to remove the main body ECU (multiplex network body ECU) (for LHD).

        Click here

      • Refer to the following procedures to remove the main body ECU (multiplex network body ECU) (for RHD).

        Click here

      • Refer to the following procedures to remove the skid control ECU (brake actuator assembly) (w/ VSC).

        Click here

      • Refer to the following procedures to remove the skid control ECU (brake actuator assembly) (w/o VSC).

        Click here

      Tech Tips


      • DTC C1582/26 is stored when a part with an incorrect part number is installed for the related parts listed above.

      • When DTC C1582/26 is output when parts have not been exchanged, replace the power steering ECU assembly as it may have an internal malfunction.

      Result
      Proceed to
      All installed related parts have correct part number
      Part with incorrect part number is installed

    All installed related parts have correct part number

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    Part with incorrect part number is installed

    REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER