POWER STEERING SYSTEM, Diagnostic DTC:C1531, C1533, C1534

DTC Code DTC Name
C1531 ECU Malfunction
C1533 ECU Malfunction
C1534 ECU Malfunction

DESCRIPTION

If the power steering ECU detects these DTCs, it will shut off the motor current sensor, power source relay, motor relay circuit (built into the power steering ECU) and stop or limit power assistance. However, power assistance will continue if DTC C1533 or C1534 is output.

DTC Code Detection Condition Trouble Area
C1531 ECU internal malfunction (CPU malfunction) is detected Power steering ECU
C1533 ECU internal malfunction (Substrate temperature sensor malfunction) is detected Power steering ECU
C1534 ECU internal malfunction (EEPROM error) is detected Power steering ECU

INSPECTION PROCEDURE

PROCEDURE


  1. RECONFIRM DTC


    1. Check for DTCs Click here.

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

      Note

      If replacing the power steering ECU, initialize the rotation angle sensor value and calibrate the torque sensor zero point Click here.


    B
    A