General Information

The Electronic Level Control (ELC) keeps the rear of the vehicle at a constant height. When weight is added to the vehicle, the ELC height sensor commands the ELC compressor on and air is added to the rear struts until the vehicle returns level.

An actuator arm is connected between the rear strut arm and the ELC height sensor, which is mounted on the body. As vehicle height changes, the sensor detects this motion and either adds air to the rear struts or exhausts air from the rear struts.

Battery voltage is applied to the ELC height sensor, ELC relay and ELC compressor assembly exhaust solenoid and inflator timer-relay at all times. This allows the ELC system to lower the vehicle height when the ignition switch is in "OFF." Whenever the ignition switch is turned to "RUN", battery voltage is applied to terminal D of the ELC height sensor after an initial delay, the compressor will run for a few seconds to charge the system.

The ELC height sensor delays 17 to 27 seconds after a change in vehicle height before closing the "Ground" switch in the ELC height sensor. This prevents system operation during normal ride motions. In addition, the ELC height sensor limits compressor or exhaust solenoid operation to a maximum of 7 minutes. This time limit is necessary to prevent ELC system operation in case of a severe system leak. Turning the ignition switch "OFF" and "ON" resets the 7 minute maximum run time.