Control Logic

Ignition Off
When the ignition switch is turned off, the system will continue to operate for approximately one hour. During this time, the system will service requests to lower the vehicle as required, provided no sensor was reading high at the time the ignition switch was turned off. Vent time is limited to 10 seconds for the rear springs and 3 seconds for the front. Approximately 1 hour after the ignition switch is turned off, the system will correct for a low vehicle height by activating the air compressor. Compressor run time is limited to 15 seconds for the rear springs and 30 seconds for the front.
Ignition In Run
When the ignition switch is first turned to the ``Run'' position, the system will raise the vehicle as necessary. No down requests will be serviced for approximately 45 seconds. After the 45 second period, up and down requests will be serviced provided no door is open. If any door is open, no down requests will be serviced until the door is closed. However, if the brakes are applied with the doors closed, neither up nor down requests will be serviced except for a rear up request already in progress.