FAIL-SAFE CHART If a
problem occurs in the power steering system, the power steering assist
will be stopped or the amount of power assist will be decreased to
protect the system. Power Steering System |
Malfunction | Fail-safe Operation |
EPS warning light | Buzzer |
- Torque sensor (rack and pinion power steering gear assembly) malfunction
- Power steering motor (rack and pinion power steering gear assembly) malfunction
- Power steering ECU (rack and pinion power steering gear assembly) malfunction
| Power steering assist stops or assist amount is limited |
Red or yellow | Sounds intermittently or once |
- Vehicle speed signal malfunction
- Skid control ECU (brake actuator assembly) malfunction
- History of power steering ECU (rack and pinion power steering gear assembly) overheating
- History of decrease in battery voltage (not malfunction)
| Power steering assist is temporarily limited |
Yellow | Sounds once |
HINT:
- If the power steering assist stops, the EPS warning light comes on (red).
- If the amount of power assist is reduced, the EPS warning light comes on (yellow) and a vibration or sound may occur.
- 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
running.
- If the battery is not sufficiently charged or the voltage decreases
temporarily, the amount of power assist will be reduced and the EPS
warning light will come on. In such cases, the amount of power assist
returns to normal when the battery voltage recovers.
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