POWER STEERING SYSTEM, Diagnostic DTC:C1581/26

DTC Code DTC Name
C1581/26 Assist Map Number Un-Writing

DESCRIPTION

This DTC will be stored if the power steering ECU assembly determines that the assist map is not written in the ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
C1581/26 Assist Map Number Un-Writing Assist map not written in power steering ECU assembly

  • CAN communication system

  • EV control ECU

  • Power steering ECU assembly

 On Assist map written -

CAUTION / NOTICE / HINT

Note


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

    Click here

PROCEDURE


  1. PERFORM ASSIST MAP WRITING


    1. Perform the assist map writing.

      Click here


      Chassis > EMPS > Utility
      Tester Display
      Signal Check

    2. Check for DTCs.

      Click here


      Chassis > EMPS > Trouble Codes
      Result
      Proceed to
      DTC C1581/26 is output.
      DTC C1581/26 is not output.

      Note

      DTC C1581/26 is cleared after the assist map is written.


    DTC C1581/26 is not output.

    END

    DTC C1581/26 is output.

  2. CHECK CAN COMMUNICATION SYSTEM


    1. Check for DTCs.


      Result
      Result Proceed to
      CAN communication system DTC is not output. A
      CAN communication system DTC is output (for RHD). B
      CAN communication system DTC is output (for LHD). C

    B

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

    C

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

    A

  3. CHECK RELATED PART


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

      Related Part EV control ECU

      Note

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

      Click here

      Tech Tips

      When DTC C1581/26 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