Air Suspension Control Module (ASCM)
All pressurized air suspension components contain high pressure air (up to 220 psig). Use extreme caution when inspecting for leaks. Wear safety goggles and adequate protective clothing when inspecting or servicing the air suspension system. A sudden release of air under this amount of pressure can cause possible serious or fatal injury.
Before performing any service on the air suspension system, the system must be disabled to prevent the system from changing ride height. Before any given component is to be serviced it must be deflated. Servicing the air suspension system without the system disabled, or with pressure in any specific component, can cause possible serious or fatal injury.
When removing an air line from a component and the air line is to be reused, do not remove the 90° fitting or the brass fitting from the air line. If either is removed, the air line must be replaced. New components have air line fittings attached; however if the original air line is used the original fitting must also be used. Do not remove protective caps or plugs from air lines or components until ready to install the air line to prevent moisture or dirt intrusion. All air line fittings must be hand started to avoid cross threading.
If the Air Suspension Control Module (ASCM) is replaced, it must be initialized using the diagnostic scan tool. This will remove the ASCM from Plant Mode. The ASCM can also be removed from Plant Mode by driving the vehicle above 19 km/h (12 mph).
The ASCM is serviced as an assembly with the air compressor assembly.
For removal and installation of the ASCM. Refer to COMPRESSOR ASSEMBLY, AIR SUSPENSION, REMOVAL AND INSTALLATION .