Air Compressor: Notes
WARNING: This page is about a different car, the 2003 Lincoln Navigator and 2003 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
The air compressor:
- consists of the compressor and vent solenoid; neither are replaceable as individual items.
- is a single cylinder electric motor driven unit that provides pressurized air as required.
- is powered by a solid state relay, which is controlled by the 4WAS module.
- passes pressurized air through the compressor air drier that contains silica gel (a drying agent). Moisture is then removed from the compressor air drier when vented air passes out of the system during vent operation.
- has a single port drier that can be replaced separately.
The vent solenoid:
- allows air to escape from the system during venting actions.
- is part of the air compressor cylinder head.
- shares a common electrical connector with the air compressor motor.
- is enclosed in the cylinder head casting, which forms an integral valve housing that allows the valve tip to enter the pressurized side of the system.
- has an O-ring seal that prevents air leakage past the valve tip.
- opens when the 4WAS module determines that lowering is required.
- provides an escape route for pressurized air when system pressures exceed safe operating levels.
- has a 1034 kPa (150 psi) internal relief valve.
- is installed with the air compressor as a unit.