POWER STEERING SYSTEM FAIL-SAFE CHART
If a problem occurs in the electronic power steering system, the PS 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 | Power assistance stops. |
| C1522 | Power assistance stops. | |
| C1523 | Power assistance stops or assist amount is limited. | |
| C1524 | Power assistance stops. | |
| C1528 | Motor Rotation Angle Sensor Malfunction | Power assistance stops. |
| C1531 | ECU Malfunction | Power assistance stops. |
| C1532 | Power assistance stops or assist amount is limited. | |
| C1533 | Power assistance stops. | |
| C1534 | Power assistance stops or assist amount is limited. | |
| C1541 | Vehicle Speed Signal Malfunction | Power assistance stops or assist amount is limited. |
| C1552 | PIG Power Supply Voltage Malfunction | Power assistance stops. |
| C1555 | Motor Relay Welding Failure | Power assistance stops or assist amount is limited. |
| C1563 | Power Steering Converter Malfunction | Power assistance stops. |
| C1564 | Lost Communication With Power Steering Converter | Power assistance stops or assist amount is limited. |
| C1565 | Lost Communication With Power Steering Converter | Power assistance stops. |
| C1568 | Power Steering Converter Malfunction | Power assistance stops or assist amount is limited. |
| C1569 | Battery Power Supply Voltage Malfunction | Power assistance stops or assist amount is limited. |
| U0129 | Lost Communication with Brake System Control Module | Power assistance stops or assist amount is limited. |
Tech Tips
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With the vehicle stopped or driving very slowly, if the steering wheel is turned repeatedly or turned to a lock position and driven for an extended period of time, the power assistance amount is decreased to prevent overheating of the motor and ECU. If this occurs, idle the engine and do not turn the steering wheel for approximately 10 minutes to return the power assistance to normal.
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If the battery has not been recharged enough or the voltage drops temporarily, the power assistance amount may be decreased and the P/S warning light may be illuminated. If this occurs, the power assistance returns to normal when the battery returns to normal. When troubleshooting malfunctions, use the intelligent tester to check for power load malfunctions through the electric power control system's load control history Click here.