Collision Avoidance and Parking Assist Systems: Description and Operation

The Parking Aid (PA) system consists of the following:
^ four sensors located in the rear bumper (sensors snap into rear bumper retaining ring holes)
^ speaker audible tone (located behind the jack storage panel)
^ Parking Aid Module (PAM) (located behind the jack storage panel)
^ parking aid disable assist switch (located in the instrument panel)
^ International Standards Organization (ISO) 9141 diagnostics

NOTE: The liftgate must be closed for correct operation of the Parking Aid (PA) system.

The PA system detects objects behind the vehicle when the vehicle reverse gear select input to the PAM is in reverse. The 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, and 16 cm (6 in) above ground. A 750 kHz variable warning tone is generated from a speaker located in the LH rear jack storage area. 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.

The PA system is enabled when the vehicle ignition is in RUN and the reverse (R) gear is selected. The PAM disabled indicator will illuminate for three seconds when the ignition is turned to RUN. The system can be disabled by depressing the PAM disable switch on the instrument panel. The PA system will indicate it is disabled by illuminating the PAM disabled indicator The system will always enable when the ignition is transitioned to RUN, or entry into reverse (R).

The PA system will be disabled if a fault is detected in one of the four sensors, the PAM speaker or the PAM. This will be indicated by the PAM disabled indicator being illuminated. The PAM is on the International Standards Organization (ISO) 9141 network and can be diagnosed with the NGS Tester.