Steering. Corolla. Zre142 Aze141
Power Assist Systems. Corolla. Zre142 Aze141
Power Steering System (For 2Zr-Fe) -- Fail-Safe Chart |
If a problem occurs in the power steering system, the P/S warning light on the combination meter comes on, and the ECU stops the steering power assist, maintains a constant amount of power assist, or reduces the amount of power assist to protect the system.
| DTC Code | Malfunction | Fail-safe |
| C1511 C1512 C1513 C1514 C1515 C1516 | Torque sensor malfunction | Power assist stopped |
| C1517 | Torque sensor malfunction | Power assist stopped |
| C1524 | Motor malfunction | Power assist stopped |
| C1531 C1532 | Power steering ECU malfunction | Power assist stopped |
| C1533 | Temperature sensor malfunction in power steering ECU | Assist force restricted |
| C1534 | EEPROM abnormal | Power assist stopped |
| C1535 | Steering wheel location data error | Power assist stopped |
| C1551 | IG power source voltage error | Power assist stopped |
| C1552 | PIG power source voltage error | Power assist stopped |
| C1553 | Overvoltage at IG and PIG terminals | Power assist stopped |
| C1554 | Power source relay malfunction | Power assist stopped |
| C1555 | Motor relay malfunction | Power assist stopped |
| C1581 | ECU malfunction (Assist map number un-writing) | Permission of control assist map |
| U0100 | ECM communication error | Power assist stopped |
| U0129 | Skid control ECU communication error | Amount of power assist remains constant at speed of 70 km/h (43 mph) |
- HINT:
- The amount of power assist may be decreased to prevent the motor and ECUs from overheating if the steering wheel is continuously turned when the vehicle is either stopped or driven at a low speed, or if the steering wheel is kept in either full lock position for a long time. In such cases, the amount of power assist returns to normal if the steering wheel is not turned for approximately 10 minutes with the engine idling.