POWER STEERING SYSTEM, Diagnostic DTC:C1582/26

DTC Code DTC Name
C1582/26 Assist Map Number Mismatch

DESCRIPTION

When an incorrect hybrid vehicle 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 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 hybrid vehicle control ECU

  • Incorrect brake booster with master cylinder 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

    for RHD:Click here

    DTC is not output

  2. CHECK RELATED PART (HYBRID VEHICLE CONTROL ECU, MAIN BODY ECU AND BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)

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

      Related Part

      Hybrid Vehicle Control ECU

      Main body ECU (multiplex network body ECU)

      Brake booster with master cylinder 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 hybrid vehicle control ECU.

        Click here

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

        for LHD:Click here

        for RHD:Click here

      • Refer to the following procedures to remove the brake booster with master cylinder assembly.

        for LHD:Click here

        for RHD:Click here

      Tip:

      • 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