Electronic Level Control (ELC)
NOTE:
Only electrical testing and diagnosis of ELC system is covered in this article. For component removal, installation and testing, See SUSPENSION - REAR ELECTRONIC 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. RSS module controls the compressor and the exhaust solenoid based on inputs from position sensors. Position sensors sense position of wheel in relation to body.
ELECTRICAL COMPONENT LOCATIONS
| Component | Location | |
|---|---|---|
| Accelerometers | ||
| Front | On Respective Strut Tower | |
| Rear | Near Respective End Of Rear Crossmember | |
| Damper Solenoid | Integral Part Of Each Strut And Shock Absorber | |
| Data Link Connector (DLC) | Below Left Side of Steering Column | |
| ELC Compressor | On Rear Suspension Support | |
| ELC Exhaust Solenoid | Part Of ELC Compressor | |
| ELC Relay | In Trunk, In Micro Relay Center No. 2 | |
| Position Sensor | On Control Arm Of Respective Wheel | |
| Powertrain Control Module (PCM) | Behind Right Side Of Dash | |
| RSS Module | Right Front Corner Of Trunk | |
| RSS Resistor Module | Right Side Of Trunk | |