Electronic Level Control (ELC)
NOTE:
Only electrical testing and diagnosis of ELC system is covered in this article. For trouble shooting, component removal and installation, and system testing, see appropriate ELECTRONIC - LEVEL CONTROL article.
ELC system automatically raises and lowers vehicle to compensates for changes in riding height (trim height) that occur because of varying vehicle loads. To raise and lower vehicle, ELC system controls air pressure in adjustable rear shock absorbers. When riding height changes, a delay of about 7-27 seconds occurs before ELC system begins to operate.
Air pressure is supplied by a compressor that is powered by an electric motor. An exhaust solenoid on compressor vents system pressure when vehicle needs to be lowered. CVRSS control module controls the compressor and the exhaust solenoid based on inputs from position sensors. Position sensors sense position of wheel in relation to body.