POWER STEERING SYSTEM, Diagnostic DTC:C1582/26

DTC Code DTC Name
C1582/26 Assist Map Number Mismatch

DESCRIPTION

When an incorrect power management control ECU, an incorrect brake booster with master cylinder assembly or an incorrect main body ECU is installed after the assist map has been written the power steering ECU assembly, then DTC C1582/26 is stored because the data does not match the vehicle specifications.

DTC No. DTC Detection Condition Trouble Area
C1582/26 Assist map number mismatch

  • CAN communication system

  • Incorrect power management control ECU

  • Incorrect brake booster with master cylinder assembly (skid control ECU)

  • Incorrect main body ECU (multiplex network body ECU)

  • Power steering ECU assembly

INSPECTION PROCEDURE

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.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  2. CHECK RELATED PART (POWER MANAGEMENT CONTROL ECU, 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 Power management control ECU
      Main body ECU (multiplex network body ECU)
      Brake booster with master cylinder assembly (skid control ECU)

      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 power management control ECU Click here.

      • Refer to the following procedures to remove the main body ECU (multiplex network body ECU) Click here.

      • Refer to the following procedures to remove the brake booster with master cylinder assembly (skid control ECU) 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

      Result

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

    B

    REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER

    A

    REPLACE POWER STEERING ECU ASSEMBLY Click here