Expedition 4WD V8-4.6L SOHC VIN 6 (1997)
Suspension Control Module: Description and Operation
Rear Air Suspension
A microcontroller-based electronic module controls the air compressor motor (through a solid state relay), and all system solenoids. The module also
provides power to the rear height sensor. The module controls vehicle height adjustments by monitoring the one height sensor, vehicle speed, a steering
sensor, acceleration input, the door ajar signal, transfer case signals, and the brake switch. The module also conducts all fail-safe and diagnostic
strategies and contains self-test and communication software for testing of the vehicle and related components.
The control module is mounted in the passenger compartment inside the instrument panel, above the radio and temperature controls.
The air suspension system control module monitors and controls the system through a 32-pin two-way connector. The control module is keyed so that it
cannot be plugged into an incorrect harness. There are two sides of the harness connection to the module. Each is uniquely colored and keyed to prevent
reversing the connections.
