F 250 4WD Super Duty V10-6.8L VIN Z CNG (2003)
Parking Assist Distance Sensor: Description and Operation
PARKING AID
Four Ultrasonic Parking Aid Sensors (located in the rear bumper)
The parking aid system detects objects behind the vehicle when the vehicle is in reverse (R) gear. The parking aid module (PAM) does this by
calculating the distance to an object by the use of four ultrasonic sensors mounted in the rear bumper.
The ultrasonic field is emitted in a semicircular area around the rear of the vehicle. The sensors can detect objects approximately 1.8 m (5.9 ft) to the
rear of the vehicle, 50 cm (1.6 ft) to the rear side of the vehicle. A 750 kHz variable warning tone is generated from a speaker located inside the RH
cowl kick panel. The speaker increases its warning tone rate as the vehicle gets closer to an obstacle. When an object is detected within 25 cm (10 in) of
the sensors, the warning tone becomes continuous.