POWER STEERING SYSTEM, Diagnostic DTC:C1581

DTC Code DTC Name
C1581 Assist Map Number Un-Writing

DESCRIPTION

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

Tech Tips

The assist map data is written in the power steering ECU to control assisting power.

The assist map has 3 types. Select an assist map according to the vehicle country information that is recorded in the ECU.

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

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ASSIST MAP WRITING


    1. Turn the ignition switch on (IG).

    2. Connect the intelligent tester to the DLC3.

      Tech Tips

      At this time, check that the P/S warning light is illuminated.


      1. Select the signal check, and change to test mode.

    3. Wait for 3 seconds.


    NEXT

  2. CHECK P/S WARNING LIGHT


    1. Check the P/S warning light.

      Result
      Result Proceed to
      P/S warning light illuminates A
      P/S warning light blinks at 0.25 seconds intervals B

      Tech Tips

      If the P/S warning light blinks at 0.25 seconds intervals, the assist map adjustment has completed normally.


    B

    END

    A

  3. CHECK DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to

      C1581 is output

      Assist map write adjustment operation not completed 3 times or more

      		 A
      Code other than C1581 is output B

      C1581 is output

      Assist map write adjustment operation not completed less than 3 times

      		 C

      Tech Tips

      If DTC C1581 is output, turn the ignition switch off. Enter the test mode again. If the DTC is output 3 times in a row, replace the power steering ECU.


    B

    REFER TO CIRCUITS INDICATED BY OUTPUT DTCS Click here

    C

    PERFORM ASSIST MAP WRITING

    A

    REPLACE POWER STEERING ECU Click here