Steering. Lexus Gs430, Gs300. Uzs190 Grs190
Power Steering. Lexus Gs430, Gs300. Uzs190 Grs190
Electronic Power Steering System -- 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.
| 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 | ||
| C1554 | Power Supply Relay Failure | |
| 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 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). |
| U0121 | Lost Communication With Anti-lock Brake System (ABS) Control Module | |
| C1567 | Lost Communication between EPS ECU and VGRS ECU | EPS cooperative control stops. |
| U0122 | Lost Communication with Vehicle Dynamics Control Module | |
| U0130 | Lost Communication with VGRS |
- 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.