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 assembly detects these DTCs, it will shut off the motor current sensor, power source relay motor relay circuit (built into the power steering ECU assembly) and stop power assistance.

DTC No. DTC Detection Condition Trouble Area
C1531 ECU internal malfunction (CPU malfunction) is detected. Power steering ECU assembly
C1533 ECU internal malfunction (Substrate temp sensor malfunction) is detected. Power steering ECU assembly
C1534 ECU internal malfunction (EEPROM) error) is detected. Power steering ECU assembly

INSPECTION PROCEDURE

PROCEDURE


  1. RECONFIRM DTC


    1. Check for DTCs Click here.

      OK
      DTC except C1531, C1533 and C1534 is not output.

      Note

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


    NG

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here