Minimum Detectable Object Locations.

Fig 1: Minimum Detectable Object Dimension Locations

Courtesy of FORD MOTOR CO.

NOTE: The object used in this system check can be fabricated using a 7.62 cm (3 inches) diameter pipe, 99.06 cm (39 inches) in length.
NOTE: The following system check should be carried out with the vehicle on a level surface.
NOTE: The parking aid module (PAM) system will default to on when the ignition key is cycled from the OFF position to the ON position.
1. Turn the ignition to the ON position, engine off.
2. Set the parking brake on.
3. Place the gear shift in R (reverse).
4. Verify that the PAM detects the object above when placed in the five specified locations (PI, P2, P3, P4 and P5).