POWER STEERING SYSTEM, Diagnostic DTC:C1581

DTC Code DTC Name
C1581 Assist Map Number Un-Writing

DESCRIPTION

This DTC will be stored if the power steering ECU (rack and pinion power steering gear 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 Assist Map Number Un-Writing Assist map not written in power steering ECU (rack and pinion power steering gear assembly)

  • Assist map is not written in the ECU

  • CAN communication system

  • Rack and pinion power steering gear assembly

 EPS warning light: Comes on Assist Map Writing is performed -

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:


  • Hybrid vehicle control ECU assembly

  • Steering sensor

  • VGRS ECU (front steering control ECU)

  • Skid control ECU assembly

PROCEDURE


  1. PERFORM ASSIST MAP WRITING


    1. Perform assist map writing.

      Click here


      Chassis > EMPS > Utility
      Tester Display
      Signal Check

    2. Check for DTCs.

      Click here


      Chassis > EMPS > Trouble Codes
      Result
      Result Proceed to
      DTC C1581 is output A
      DTC C1581 is not output B

    B

    END

    A

  2. 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

    A

    REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY for 2WD: Click here
    REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY for AWD: Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here