POWER STEERING SYSTEM, Diagnostic DTC:C1582

DTC Code DTC Name
C1582 Assist Map Number Mismatch

DESCRIPTION

When an incorrect ECM, main body ECU (multiplex network body ECU) or skid control ECU (brake actuator assembly) is installed after the assist map has been written to the power steering ECU (rack and pinion power steering gear assembly), DTC C1582 is stored because the information stored in the power steering ECU (rack and pinion power steering gear assembly) does not match the vehicle specifications.

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

  • CAN communication system

  • Incorrect ECM

  • Incorrect main body ECU (multiplex network body ECU)

  • Incorrect skid control ECU (brake actuator assembly)

  • Rack and pinion power steering gear assembly

 EPS warning light: Does not come on Ignition switch is turned to ON again -

CAUTION / NOTICE / HINT

Note

If the rack and pinion power steering gear assembly has been replaced, perform assist map writing and torque sensor zero point calibration.

Click here

Tech Tips

Related parts store information necessary for assist map writing.

Related Part:


  • ECM

  • Main body ECU (Multiplex network body ECU)

  • Skid control ECU (Brake actuator assembly)

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 the part below has 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 the related part to check it, be sure to follow the appropriate procedures and precautions.


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

      Note

      If the rack and pinion power steering gear assembly has been replaced, perform assist map writing.

      Click here

      Result
      Result Proceed to
      The related part has an incorrect part number. A
      The related part has the correct part number, or a related part and rack and pinion power steering gear assembly have not been replaced. B

    B

    REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY Click here

    A

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


    1. Replace the related part with one that has the correct part number.


      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK FOR DTC


    1. Check for DTCs.


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

    A

    END

    B

    REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY Click here