4WAS Main Control Unit

4WAS MAIN CONTROL UNIT


Fail Safe


4WAS system (Main)
- 4WAS system enters in the fail-safe mode (4WAS system stopped) and 4WAS warning lamp turns ON if an error is detected in 4WAS system (4WAS main control unit) component part.
- 4WAS system enters in the protection function mode (4WAS system temporarily stopped) if 4WAS system continues the heavy load condition or the sensor self-check condition. (4WAS system reactivates automatically if the heavy load condition and the self-check condition are resolved.) 4WAS warning lamp stays OFF in the protection function mode.






EPS system
- EPS system (4WAS main control unit) enters the fail-safe mode





(that allows the steering force to be controlled without impairing the drive ability) if the input from each sensor is not within the specified range. Then, 4WAS warning lamp turns ON.