POWER STEERING SYSTEM(for Manual Tilt and Manual Telescopic Steering Column), Diagnostic DTC:C1582/26

DTC Code DTC Name
C1582/26 Assist Map Number Mismatch

DESCRIPTION

When an incorrect ECM, an incorrect Skid control ECU 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

  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check for DTCs.

      for LHD: Click here

      for RHD: Click here

      Result
      Proceed to
      CAN communication system DTC is not output.
      CAN communication system DTC is output.

    CAN communication system 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

    CAN communication system DTC is not output.

  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
      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.


      Tech Tips

      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