Electronic Level Control Solenoid Valve

CIRCUIT DESCRIPTION
The ECU energizes the height control valve solenoid, which opens the valve and leads compressed air to the pneumatic cylinder, thus raising the vehicle height.
When lowering the vehicle height, the ECU energizes not only the height control valve solenoid but also the exhaust valve solenoid which open the valve and discharge the compressed air in the pneumatic cylinder to the atmosphere.
Front and rear height control valves have two solenoid valves to control right hand and left hand pneumatic cylinders separately.
The exhaust valve is located on the compressor unit, and has one solenoid valve only.