General Procedure

NOTE: The object used in this system check can be fabricated from 76.2 mm (3 in) OD 990.6 mm (39 in) length pipe (from a hardware or plumbing supply).

NOTE: The following system check should be carried out with the vehicle on a level surface. The specified object locations are approximate, not absolute.

NOTE: The parking aid system defaults to on when the ignition key is cycled from OFF to ON.

NOTE: The scan tool may be used to monitor distance Parameter Identifications (PIDs). The distance Parameter Identifications (PIDs) read between 0 and 255 cm (0 and 8 ft) on a correctly functioning system.

Turn the ignition to the ON position, engine off.

Fig 1: Identifying Scan Tool Distance For Monitoring Parameter Identifications (PIDs)
Courtesy of FORD MOTOR CO.
Set the parking brake on.
Place the gear shift in REVERSE (R).
Verify that the parking aid system detects the specified object when placed within the 5 specified locations (P1, P2, P3, P4, P5). The pipe should be inside of these locations.

The speaker should beep slowly when objects are detected on the outer edges of the detection zone, and increase as the object is moved closer to the vehicle. When the object is within 457.2 mm (18 in) of the rear bumper, the sounder should be on continuously
If the parking aid system does not detect the object, REFER to Symptom Chart: Parking Aid - Audible .