Operation CHARM: Car repair manuals for everyone.

System Components

ELC COMPRESSOR RELAY
This relay is used to switch battery voltage to the ELC compressor motor when compressor activity is requested. The relay is located in the relay center. The high-side of the relay coil is tied to ignition through a fuse. The low-side of the relay coil is connected to the "Compressor Relay Enable" line of the CVRSS control module. The CVRSS control module switches the low-side to ground when compressor activity is required.

ELC COMPRESSOR MODULE WITH INTEGRAL EXHAUST VALVE
The compressor module is located under the vehicle at the right rear corner. The compressor module is comprised of a compressor assembly, air dryer, integral exhaust solenoid and a pressure limiter valve. The integral exhaust valve is located in the compressor head. The high-side of the exhaust coil is tied to battery and the low-side is connected to the "Exhaust Valve Enable" line of the CVRSS control module. The CVRSS control module switches this low-side to ground when exhaust or compressor activity is required.

AIR TUBE (AIR LINES)
An air tube (two air lines) is run from the output of the compressor module's air dryer to both rear air adjustable shock absorbers.