POWER STEERING SYSTEM, Diagnostic DTC:C1582/26

DTC Code DTC Name
C1582/26 Assist Map Number Mismatch

DESCRIPTION

If an incorrect power steering ECU, ECM, absorber control ECU, VGRS ECU (front steering control ECU) or DRS ECU (rear steering control ECU) is installed, DTC C1582/26 is stored as the vehicle specification and data do not match.

Tech Tips

The assist map is data written in the power steering ECU to control the degree of power assist. The assist map is selected based on the vehicle specified communication data.

DTC Code DTC Detection Condition Trouble Area
C1582/26 Data that does not match the vehicle specification is received through CAN communication.

  • CAN communication system

  • ECM (incorrect part)

  • Absorber control ECU (incorrect part)

  • VGRS ECU (front steering control ECU) (incorrect part)

  • DRS ECU (rear steering control ECU) (incorrect part)

  • Power steering ECU assembly (incorrect part)

INSPECTION PROCEDURE

Note


  • If the power steering ECU assembly is replaced with a new one, perform assist map writing, clear the motor rotation angle sensor calibration value, initialize the motor rotation angle sensor value and calibrate the torque sensor zero point Click here.

  • When replacing the VGRS ECU (front steering control ECU), perform actuator angle neutral position calibration and initialization after replacement Click here.

  • When replacing the DRS ECU (rear steering control ECU), perform neutral position memorization and motor rotation angle sensor calibration Click here.

PROCEDURE


  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output for LHD B
      for RHD C

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  2. CHECK RELATED PART


    1. Check if any of the parts listed below have been replaced with an incorrect part in the past.

      Related Part ECM
      Absorber control ECU
      VGRS ECU (front steering control ECU)
      DRS ECU (rear steering control ECU)

      Note

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


      • Refer to the following procedures to remove the ECM Click here for 2GR-FSE, Click here for 4GR-FSE).

      • Refer to the following procedures to remove the absorber control ECU Click here.

      • Refer to the following procedures to remove the VGRS ECU (front steering control ECU) Click here.

      • Refer to the following procedures to remove the DRS ECU (rear steering control ECU) Click here.

      Tech Tips


      • DTC C1582/26 is stored when a part with an incorrect part number is installed for the related parts listed above.

      • When DTC C1582/26 is output when parts have not been exchanged, replace the power steering ECU assembly as it may have an internal malfunction.

      Result

      Result

      Proceed to
      All installed related parts have correct part number A
      Part with incorrect part number is installed B

    B

    REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER

    A

    REPLACE POWER STEERING ECU ASSEMBLY Click here