POWER STEERING SYSTEM, Diagnostic DTC:C1581

DTC Code DTC Name
C1581 Assist Map Number Un-Writing

DESCRIPTION

The power steering ECU assembly stores this DTC when it determines that the assist map is not written in the ECU.

DTC No. DTC Detection Condition Trouble Area
C1581 Assist map not written in power steering ECU assembly

  • Power steering ECU assembly

  • CAN communication system

  • Hybrid control system

INSPECTION PROCEDURE

Note

If the steering column assembly or power steering ECU assembly has been replaced, perform rotation angle sensor value initialization and torque sensor zero point calibration Click here.

PROCEDURE


  1. PERFORM ASSIST MAP WRITING


    1. Perform assist map writing Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC is not output.

    NG

    CHECK FOR DTC (CAN COMMUNICATION SYSTEM) Click here

    OK

    END

  3. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Check for DTCs Click here.

      OK
      DTC is not output.

      Tech Tips

      If a CAN communication system DTC is output, first troubleshoot the CAN communication system malfunction, then perform the assist map writing again Click here.


    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  4. CHECK FOR DTC (HYBRID CONTROL SYSTEM)


    1. Check for DTCs Click here.

      OK
      DTC is not output.

      Tech Tips

      If a hybrid control system DTC is output, first troubleshoot the hybrid control system, then perform assist map writing again Click here.


    NG

    GO TO HYBRID CONTROL SYSTEM Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here