DTC    C1531    ECU Malfunction

DTC    C1532    ECU Malfunction

DTC    C1533    ECU Malfunction

DTC    C1534    ECU Malfunction

DTC    C1535    ECU Malfunction


DESCRIPTION

The fail-safe function operates to stop power assist when DTCs indicating ECU malfunctions are stored. However, the power assist operation continues when DTC C1533 or C1534 is stored because it indicates an EEPROM error in the ECU.

DTC No.
DTC Detection Condition
Trouble Area
C1531
ECU internal malfunction (CPU malfunction)
Power steering ECU assembly
C1532
ECU internal malfunction (Peripheral circuit malfunction)
C1533
ECU internal malfunction (Substrate temperature sensor malfunction)
C1534
ECU internal malfunction (EEPROM error)
C1535
ECU internal malfunction (Steering wheel location data error)

INSPECTION PROCEDURE

NOTICE:
If the power steering ECU assembly has been replaced, perform the torque sensor zero point calibration and assist map writing (Click here).
1.CONFIRM DTC

  1. Check for DTCs (Click here).

    Result 
    Result
    		Proceed to
    DTCs other than C1531, C1532, C1533, C1534 and C1535 are output
    		A
    Other DTC are not output
    		B


B
REPLACE POWER STEERING ECU ASSEMBLY (Click here)
A

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (Click here)