Symptom Chart

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

Condition	Possible Sources	Action
No communication with the parking aid module (PAM)	Fuse Wiring, terminals or connectors PAM	REFER to MODULE COMMUNICATIONS NETWORK article.
The parking aid is inoperative	Wiring, terminals or connectors PAM Instrument cluster (IC)	Go to Pinpoint Test A .
Continuous or intermittent tone when no obstacles or fault codes are present (certain obstacles may appear "stealthy" to the system, depending on geometric shape, size and material)	Dirty or iced over parking aid sensor	CLEAN the rear bumper with high-pressure water.
	Aftermarket add-ons located on the rear bumper fascia including but not limited to trailer hitches, emblems, and metallic stickers	REMOVE the aftermarket item and CARRY OUT the self-test.
The parking aid is inoperative - cannot be disabled	Wiring, terminals or connectors PAM	Go to Pinpoint Test E .