POWER STEERING SYSTEM (for 2AR-FSE), Diagnostic DTC:C1531/25, C1533/25, C1534/25

DTC Code DTC Name
C1531/25 ECU Malfunction
C1533/25 Temperature Sensor Circuit is Low or High
C1534/25 EEPROM Malfunction

DESCRIPTION

If the power steering ECU assembly stores these DTCs, it turns off the motor current sensor, power source relay and motor relay circuit (built into the power steering ECU assembly) and stops or limits power assist.

DTC Code DTC Detection Condition Trouble Area
C1531/25 An ECU internal malfunction (CPU malfunction) is detected. Power steering ECU assembly
C1533/25 An ECU internal malfunction (substrate temperature sensor malfunction) is detected. Power steering ECU assembly
C1534/25 An ECU internal malfunction (EEPROM error) is detected. Power steering ECU assembly

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.

PROCEDURE


  1. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      Only DTC C1531/25, C1533/25 or C1534/25 is output A
      DTCs other than C1531/25, C1533/25 or C1534/25 are output B

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

    REPLACE POWER STEERING ECU ASSEMBLY Click here