Principles of Operation

PRINCIPLES OF OPERATION

NOTE: The liftgate must be closed for correct operation of the parking aid system.

The parking aid system detects objects behind the vehicle when the vehicle is in reverse gear. The parking aid module does this by calculating the distance to an object by the use of 4 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 and 50 cm (1.6 ft) to the rear side of the vehicle. A 750 kHz variable warning tone is generated from the reverse parking aid speaker. 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 parking aid system is enabled when the ignition switch is in the RUN position and reverse gear is selected. The parking aid disabled indicator illuminates for 3 seconds when the ignition switch is turned to the RUN position. The system can be disabled by pressing the parking aid switch on the instrument panel. The parking aid system indicates it is disabled by illuminating the parking aid disabled indicator (in the parking aid switch).

The parking aid system is disabled if a fault is detected in one of the 4 sensors, the parking aid speaker, or the parking aid module. This is indicated by the parking aid disabled indicator being illuminated when the vehicle is put into reverse gear. The parking aid module is on the International Standards Organization (ISO) 9141 network and can be diagnosed with a diagnostic tool.