Automatic Level Control (ALC) System
The ALC system controls the ride height of the rear of the vehicle via a compressor with an integral exhaust solenoid valve. The system consists of the following components:
| • | Consists of two air assisted shock absorbers. |
| • | Consists of one level sensor with an integrated control module located under the body. |
| • | Consists of a compressor with an integral exhaust solenoid valve. |
| • | Consists of a compressor relay. |
The level sensor senses the height of the rear of the vehicle. The level sensor then, compares it with a desired trim height programmed into the level sensor's memory. The exhaust valve energizes if the vehicle is higher than desired. The compressor relay energizes in order to activate the compressor assembly if the vehicle is lower than desired.
The leveling indicator light performs a four second bulb test when the ignition is switched to the ON position.
The leveling indicator light illuminates when an extreme load condition is present. When an extreme load condition is present a potential rear suspension clearance problem may exist. The light goes out when the leveling is complete.
The leveling indicator light does not illuminate during normal leveling cycles.
