POWER STEERING SYSTEM(for 2AR-FSE), Diagnostic DTC:C1582/26

DTC Code DTC Name
C1582/26 Assist Map Number Mismatch

DESCRIPTION

If an incorrect power steering ECU assembly, power management control ECU or absorber control ECU (w/ Adaptive Variable Suspension System) 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 assembly 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

  • Power management control ECU (incorrect part)

  • Absorber control ECU (w/ Adaptive Variable Suspension System) (incorrect part)

  • Power steering ECU assembly (incorrect part)

CAUTION / NOTICE / HINT

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.

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 Power management control ECU
      Absorber control ECU (w/ Adaptive Variable Suspension System)

      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 power management control ECU Click here.

      • Refer to the following procedures to remove the absorber control ECU (w/ Adaptive Variable Suspension System) 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

    A

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    B

    REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER