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
WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
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 DETECTION CONDITION AND TROUBLE AREA REFERENCE
| 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) |