DTC    C1531/31    EPS ECU Circuit Malfunction

DTC    C1532/32    EPS ECU Circuit Malfunction

DTC    C1533/33    EPS ECU Circuit Malfunction

DTC    C1534/34    EPS ECU Circuit Malfunction

DTC    C1535/35    Steering Wheel Location Data Error


DESCRIPTION

The fail-safe function operates to stop power assist when DTCs indicating ECU malfunctions are output. However, the power assist operation continues when DTC C1534/34 is output because it indicates an EEPROM error in the ECU.

DTC No.
DTC Detection Condition
Trouble Area
C1531/31
ECU internal malfunction (CPU malfunction)
Power steering ECU
C1532/32
ECU internal malfunction (Peripheral circuit malfunction)
C1533/33
ECU internal malfunction (Substrate temperature sensor malfunction)
C1534/34
ECU internal malfunction (EEPROM error)
C1535/35
Steering wheel location data error (LHD or RHD)

INSPECTION PROCEDURE

1.CONFIRM DTC
  1. Check for DTCs.

    OK:
    DTCs other than C1531/31, C1532/32, C1533/33, C1534/34 and C1535/35 are not output.


NG
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (Click here)
OK

REPLACE POWER STEERING ECU (Click here)