DTC C1521: Motor Circuit Malfunction; DTC C1531: ECU Malfunction; DTC C1532: ECU Malfunction; DTC C1533: ECU Malfunction; DTC C1534: ECU Malfunction; DTC 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 |