Fail-Safe Chart
When a problem occurs in the electronic power steering system, the P/S warning light on the combination meter comes on, and the ECU stops the steering power assist, maintains the amount of power assist constant, or reduces the amount of power assist to protect the system.
FAIL-SAFE CHART
| DTC No. | Malfunction | Fail-safe |
|---|---|---|
| C1511/11 C1512/12 C1513/13 C1514/14 |
Torque sensor malfunction | Assist force restricted |
| C1517/17 | Torque sensor malfunction | Power assist stopped |
| C1524/24 | Motor malfunction | Power assist stopped |
| C1531/31 C1532/32 |
Power steering ECU malfunction | Power assist stopped |
| C1533/33 | Temperature sensor malfunction in power steering ECU | Assist force restricted |
| C1534/34 | EEPROM abnormal | Assist force restricted |
| C1535/35 | Steering wheel location data error | Power assist stopped |
| C1541/41*1 C1542/42*1 |
Speed sensor malfunction | Amount of power assist remains constant at speed of 70 Km/h (43 mph) |
| C1551/51 | IG power source voltage error | Assist force restricted |
| C1552/52 | PIG power source voltage error | Assist force restricted |
| C1553/53 | Over voltage at IG and PIG terminals | Assist force restricted |
| C1554/54 | Power source relay malfunction | Power assist stopped |
| C1555/55 | Motor relay malfunction | Power assist stopped |
| U0100 | ECM Communication Error | Amount of power assist remains constant at speed of 70 Km/h (43 mph)*3 |
| U0129*2 | ABS ECU Communication Error | Amount of power assist remains constant at speed of 70 Km/h (43 mph) |
| - | Extremely high temperature in ECU | Assist force restricted until normal ECU temperature recovers |
| - | Power source voltage drop | Assist force suspended until voltage recovers |
| *1: w/o ABS *2: w/ ABS *3: except Hatchback (w/o ABS) |
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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 at 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.