Lexus IS250 IS220d GSE20 ALE20 - POWER STEERING
ELECTRONIC POWER STEERING SYSTEM - FAIL-SAFE CHART
If a problem occurs in the electronic 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.
| DTC No. | Malfunction | Fail-safe |
| C1511 | Torque Sensor Circuit Malfunction | Power assistance stops. |
| C1512 | ||
| C1513 | ||
| C1521 | Motor Circuit Malfunction | |
| C1522 | ||
| C1523 | ||
| C1524 | ||
| C1528 | Motor Rotation Angle Sensor Malfunction | |
| C1531 | ECU Malfunction | |
| C1532 | ||
| C1555 | Motor Relay Welding Failure | |
| C1533 | ECU Malfunction | System overheat prevention control continues without using the substrate temperature sensor. |
| C1534 | ECU Malfunction | Torque sensor zero point and rotation angle sensor calibration value are set to the default values. |
| C1541 | Vehicle Speed Signal Malfunction | Amount of power assistance is fixed for a speed of 100 km/h (62 mph). |
| C1521 | 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 with the engine idling.
LEXUS IS250, IS220d / GSE20 ALE20