Fail-Safe Chart
If a problem occurs in the electric power steering system, the P/S warning light will come on in the combination meter and steering power assistance will be stopped, fixed at a particular point, or decreased simultaneously to protect the system.
FAIL-SAFE CHART
| DTC No. | Malfunction | Fail-safe |
|---|---|---|
| C1511 | Torque Sensor Abnormal | Power assistance stops. |
| C1512 | ||
| C1513 | ||
| C1521 | Motor Abnormal | |
| C1522 | ||
| C1523 | ||
| C1524 | ||
| C1528 | Motor Rotation Angle Sensor Malfunction | |
| C1531 | ECU Malfunction | |
| C1532 | ||
| C1546 | HV System Malfunction | |
| C1555 | Motor Relay Welding Failure | |
| C1568 | DC-DC Converter Malfunction | |
| C1533 | ECU Malfunction | System overheat prevention control continues without using the substrate temperature sensor. |
| C1534 | ECU Abnormal | Power assistance continues with the amount of power assistance fixed for a speed of 100 km/h (62 mph) and with torque sensor zero point and rotation angle sensor calibration value set to the default values. |
| C1541 | Vehicle Speed System Abnormal | Amount of power assistance is fixed for a speed of 100 km/h (62 mph). |
| U0121 | Lost Communication With Anti-lock Brake System (ABS) Control Module |
HINT:
The amount of power assistance 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 at either full lock position for a long time. In that case, the amount of power assistance will return to normal if the steering wheel is not turned for approximately 10 minutes in the READY-on state.