POWER STEERING SYSTEM, Diagnostic DTC:C1521, C1531, C1532, C1533, C1534, C1554

DTC Code DTC Name
C1521 Motor Circuit Malfunction
C1531 ECU Malfunction
C1532 ECU Malfunction
C1533 ECU Malfunction
C1534 ECU Malfunction
C1554 Power Supply Relay Failure

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) Power steering ECU
C1532 ECU internal malfunction (Peripheral circuit malfunction) Power steering ECU
C1533 ECU internal malfunction (Substrate temperature sensor malfunction) Power steering ECU
C1534 ECU internal malfunction (EEPROM error) Power steering ECU
C1554 Power source relay circuit malfunction Power steering ECU

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.

      OK
      DTC is not output.

    NG

    REPLACE POWER STEERING ECU Click here

    OK

    CHECK INTERMITTENT PROBLEMS Click here