Symptom Chart

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. 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	Fuse Circuitry Parking aid module	MODULE COMMUNICATIONS NETWORK article.
The parking aid is inoperative/does not operate correctly	Circuitry Parking aid switch Parking aid module Rear bumper alignment	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(s)	CLEAN the rear bumper and sensors with high pressure water.
	Parking aid sensor bezel(s) or parking aid sensor(s) locked into the rear bumper incorrectly Parking aid sensors are not aligned correctly	REMOVE and correctly INSTALL the parking aid sensor(s) and or bezel(s) as necessary.
	Parking aid sensor(s) Parking aid module	CARRY OUT the Azimuth System Check and the Elevation System Check in this article.