Crown Victoria V8-4.6L VIN W (2000)
Multifunction Electronic Control Modules: Description and Operation
The multifunction modules consist of the following:
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air suspension control module
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Driver Door Module (DDM)
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Lighting Control Module (LCM)
The Air Suspension Control Module is linked to its own Data Link Connector (DLC). The air suspension control module controls the air suspension
and the Electronic Variable Orifice (EVO) steering.
A microprocessor controls the air suspension system. The microprocessor and its supporting hardware are contained in the air suspension control
module. The air suspension control module responds to signals from various sensors in the vehicle to maintain the programmed ride height while the
vehicle is either moving or stopped. The air suspension control module accomplishes this by opening and closing solenoid valves to control the amount
of air in the air spring(s). The air suspension control module turns on the compressor by applying voltage through the compressor relay to inflate the air
spring(s) and raise the vehicle. The air suspension control module opens the vent solenoid to lower the vehicle by releasing air from the air spring(s)in
response to signal inputs from the air suspension height sensor(s).
The Driver Door Module (DDM) is connected on the International Standards Organization (ISO) 9141 communication network. The DDM controls
many functions including power windows, power door locks and remote keyless entry.
The Lighting Control Module (LCM) is connected on the ISO 9141 communication network. The LCM controls both interior and exterior lighting,
back lighting, the battery saver and warning chimes.
The LCM eliminates the electronic interference and heat associated with the thermoelectric devices used previously. The LCM is a microprocessor-
based module that controls several vehicle subsystems. It responds to electrical input signals from various switches, sensors, and external modules.
LCM subsystem functions include:
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headlamps with autolamps
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turn signal lamps/hazard flasher lamps
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cornering lamps
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parking lamps
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courtesy lamps
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demand lamps
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battery saver
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backlighting
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interfacing with the Driver Door Module (DDM) via SCP for illuminated entry
