Fail-Safe Function

The headlight beam level control ECU operates in the fail-safe mode if an abnormal condition such as those listed below has been detected and illuminates the automatic headlight leveling system warning light in the instrument panel.

• Actuator -  Holds the beam at the position of the actuator when the abnormality (open or short) has been detected.
• Rear Height Control Sensor -  Returns the beam to the actuator's initial set position if a signal level abnormality has been detected higher than the initial set position. Holds the beam at the position of the actuator when a signal level abnormality has been detected, if the abnormality has been detected lower than the initial set position.
• Headlight Beam Level Control ECU -  Holds the beam at position of the actuator when the abnormality (abnormal processing of the CPU) has been detected.