System Description

SYSTEM

System Description

- Based on the signal from the vehicle height sensor, the air levelizer control module operates the air compressor (exhaust solenoid) and controls vehicle height so that it remains at a constant height. This operation occurs if vehicle height of vehicle rear is judged to be 15 mm (0.59 in) or more or 15 mm (0.59 in) or less than standard vehicle height, continuously for 30 seconds, when engine is started.
- If malfunction is detected, the system enters fail-safe mode. Refer to "Fail-safe" Fail Safe.

INPUT/OUTPUT SIGNAL

Air levelizer control module transmits and receives following signals between each control unit via CAN communication line.






OPERATING PRINCIPLE

System Time Table





Vehicle height raises [When starting engine, if vehicle height of vehicle rear continues for 30 seconds or more in a status that is 15 mm (0.59 in) or less than standard vehicle height]
1.Vehicle height sensor detects vehicle height status, and transmits this information to air levelizer control module.
2.Air levelizer control module turns air compressor relay ON and operates air compressor.
3.Air compressor charges air in air chamber of shock absorber.
4.Vehicle height raises, and control is complete when status is 1 mm (-0.04 in) of standard vehicle height value.
Vehicle height lowers [When starting engine, if vehicle height of vehicle rear continues for 30 seconds or more in a status that is 15 mm (0.59 in) or more of standard vehicle height]
1.Vehicle height sensor detects vehicle height status, and transmits this information to air levelizer control module.
2.Air levelizer control module turns exhaust solenoid of air compressor ON.
3.Air compressor discharges air from air chamber of shock absorber.
4.Vehicle height lowers, and control is complete when status is +1 mm (+0.04 in) of standard vehicle height.