POWER STEERING SYSTEM, Diagnostic DTC:C1582

DTC Code DTC Name
C1582 Assist Map Number Mismatch

DESCRIPTION

When an incorrect ECM, skid control ECU (brake actuator assembly), steering sensor or VGRS ECU (front steering control ECU)* is installed after the assist map has been written to the power steering ECU (rack and pinion power steering gear assembly), DTC C1582 is stored because the information stored in the power steering ECU (rack and pinion power steering gear assembly) does not match the vehicle specifications.


DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
C1582 Assist Map Number Mismatch Assist map number mismatch

  • CAN communication system

  • Incorrect ECM

  • Incorrect steering sensor

  • Incorrect VGRS ECU (front steering control ECU)*

  • Incorrect skid control ECU (brake actuator assembly)

  • Rack and pinion power steering gear assembly

 EPS warning light: Does not come on Engine switch on (IG) again -

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:


  • ECM

  • Steering sensor

  • VGRS ECU (front steering control ECU)*

  • Skid control ECU (brake actuator assembly)


    • *: w/ Variable Gear Ratio Steering System

PROCEDURE


  1. 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

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK RELATED PART


    1. Check if the part below has been replaced with an incorrect part in the past.

      Related Part ECM
      Steering sensor
      VGRS ECU (front steering control ECU)*
      Skid control ECU (brake actuator assembly)

      • *: w/ Variable Gear Ratio Steering System

      Note

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


    2. When DTC C1582 is output and parts have not been exchanged, replace the rack and pinion power steering gear assembly as it may have an internal malfunction.

      Note

      If the rack and pinion power steering gear assembly has been replaced, perform assist map writing.

      Click here

      Result
      Result Proceed to
      The related part has an incorrect part number A
      The related part has the correct part number, or a related part and rack and pinion power steering gear assembly have not been replaced B

    A

    REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER ECM Click here Steering sensor Click here VGRS ECU (front steering control ECU) Click here Skid control ECU (brake actuator assembly) for LHD: Click here for RHD: Click here

    B

    REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY Click here