Symptom Chart

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
NOTE: Be sure that air suspension switch is in the ON position before determining that a fault condition is present. No communication with the air suspension module	CJB fuse 4 (10A) BJB fuse 5 (10A) Circuitry Data link connector (DLC) Air suspension module	GO to PINPOINT TEST A .
Unable to enter self-test	Air suspension module	GO to PINPOINT TEST B .
Scan tool indicates self-test failure when attempting to run self-test	Air suspension switch Circuitry	GO to PINPOINT TEST K .
Scan tool indicates self-test failure when attempting to run self-test	Air suspension switch Circuitry	GO to PINPOINT TEST K .
Did not detect open and close door signals	Circuitry Door ajar switch Driver door module (DDM) Air suspension module	GO to PINPOINT TEST D .
The compressor is inoperative	Circuitry Air compressor relay Air compressor	GO to PINPOINT TEST L .
The air compressor continuously cycles with the ignition switch in the OFF position and no DTC is set	Circuitry Air compressor relay Air suspension module	GO to PINPOINT TEST M .
Air suspension system works with air suspension switch in the OFF position	Air suspension switch	INSTALL a new air suspension switch. REFER to AIR SUSPENSION SWITCH . TEST the system for normal operation.
Uneven vehicle height	Pneumatic fault Air suspension height sensor Air spring solenoid Air compressor Air spring Air suspension module	REPAIR as necessary.
Incorrect vehicle trim height	Incorrect ride height adjustment Incorrect height sensor calibration Incorrect air suspension module calibration	SET the ride height. REFER to RIDE HEIGHT ADJUSTMENTS .
Incorrect vehicle trim height	Rear suspension component damage	INSPECT and REPAIR the rear suspension components as necessary. REFER to REAR SUSPENSION .