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

DTC Code DTC Detection Condition Trouble Area
C1521 Motor overcurrent Power steering ECU assembly
C1531 An ECU internal malfunction (CPU malfunction)
C1532 An ECU internal malfunction (peripheral circuit malfunction)
C1533 An ECU internal malfunction (substrate temperature sensor malfunction)
C1534 An ECU internal malfunction (EEPROM error)
C1554 A power supply relay circuit malfunction

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTC(s) Click here.

    2. Check for DTCs Click here.

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

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE POWER STEERING ECU ASSEMBLY Click here