POWER STEERING SYSTEM, Diagnostic DTC:C1521, C1531, C1532, C1533, C1534

DTC Code DTC Name
C1521 Motor Circuit Malfunction
C1531 ECU Malfunction
C1532 ECU Malfunction
C1533 ECU Malfunction
C1534 ECU Malfunction

DESCRIPTION

If the power steering ECU detects these DTCs, it will shut off the motor relay circuit (built into the power steering ECU) and stop power assist. However, power assist continues if DTC C1533 or C1534 is stored.

DTC No. DTC Detection Condition Trouble Area
C1521 Motor overcurrent Power steering ECU
C1531 ECU internal malfunction (CPU malfunction)
C1532 ECU internal malfunction (Peripheral circuit malfunction)
C1533 ECU internal malfunction (Substrate temperature sensor malfunction)
C1534 ECU internal malfunction (EEPROM error)

INSPECTION PROCEDURE

Note

If the power steering ECU has been replaced with a new one, perform the rotation angle sensor initialization and torque sensor zero point calibration Click here.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is not output. A
      DTC is output. B

    B

    REPLACE POWER STEERING ECU Click here

    A

    CHECK INTERMITTENT PROBLEMS Click here