POWER STEERING SYSTEM, Diagnostic DTC:C1581

DTC Code DTC Name
C1581 Assist Map Number Un-Writing

DESCRIPTION

The power steering ECU assembly outputs 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

  • Hybrid control system

  • CAN communication system

INSPECTION PROCEDURE

Note

If the power steering ECU assembly has been replaced with a new one, perform rotation angle sensor 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.

      Result
      Result Proceed to
      DTC is still output even after performing assist map writing 3 times. A
      DTC is still output even after performing assist map writing once or twice*1 B
      DTC is not output. C

      Tech Tips

      *1: Perform the assist map writing again if DTC C1581 is still output even after the assist map writing is performed once or twice.


    B

    PERFORM ASSIST MAP WRITING AGAIN Click here

    C

    END

    A

  3. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Check for DTCs Click here.

      OK
      DTC is not output.

      Tech Tips

      If the CAN communication system DTC is output, first troubleshoot the CAN communication system malfunction, then perform 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 the 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