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 (R) 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 a speaker attached to the parking aid module. 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 when the vehicle is put into reverse (R) gear. The parking aid disabled indicator illuminates for 3 seconds when the ignition switch is turned to RUN. 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 system is always enabled when the ignition switch is turned to the RUN position, and when the vehicle is put into reverse (R) gear.
The parking aid system is disabled if a fault is detected in any 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 (R) gear. The parking aid module is on the International Standards Organization (ISO) 9141 network and can be diagnosed with a diagnostic tool.
Normal Operation
Power is supplied to the parking aid module on circuit 972 (BK/WH). The parking aid module is grounded through circuit 1203 (BK/LB).
The parking aid system is enabled when the ignition switch is in the RUN positon and REVERSE gear is selected. The parking aid module supplies power to the parking aid sensors on circuit 1439 (BN/PK). The parking aid module supplies ground to the parking aid sensors on circuit 1440 (DG/YE). The parking aid module receives a signal from the parking aid sensors on circuits 1444 (DB/YE), 1443 (WH/LB), 1442 (DG/WH) and 1441 (WH/LG). The system can be disabled through the parking aid switch. A 750 Hz variable warning tone is generated from a parking aid speaker. The parking aid speaker increases the warning tone rate as the vehicle gets closer to an obstacle.
The parking aid module supplies power to the parking aid sensors on circuit 1439 (BN/PK). The parking aid module supplies ground to the parking aid sensors on circuit 1440 (DG/YE). The parking aid module receives a signal from the parking aid sensors on circuits 1444 (DB/YE), 1443 (WH/LB), 1442 (DG/WH) and 1441 (WH/LG).
The parking aid module supplies power to the parking aid sensors on circuit 1439 (BN/PK). The parking aid module supplies ground to the parking aid sensors on circuit 1440 (DG/YE). The parking aid module receives a signal from the parking aid sensors on circuits 1444 (DB/YE), 1443 (WH/LB), 1442 (DG/WH) and 1441 (WH/LG).
The parking aid system is enabled when the ignition switch is in the RUN position and REVERSE gear is selected. The parking aid module calculates the distance to an object by the use of 4 ultrasonic sensors mounted in the rear bumper. The parking aid sensors can detect obstructions in the path behind the vehicle. A 750 Hz variable warning tone is generated from a parking aid speaker. The parking aid speaker increases the warning tone rate as the vehicle gets closer to an obstacle.
The system can be disabled by the parking aid switch. A 750 Hz variable warning tone is generated from a parking aid speaker. The parking aid speaker increases the warning tone rate as the vehicle gets closer to an obstacle.
The parking aid system is enabled when the ignition switch is in the RUN position and the transmission is in REVERSE. The system can be disabled by the parking aid switch.
The parking aid system is enabled when the ignition switch is in the RUN position and the transmission is in REVERSE. The system can be disabled by the parking aid switch. The parking aid module sends a signal to the LED over circuit 1436 (VT/OG) when the switch is pressed. The switch is grounded through circuit 1205 (BK).
The parking aid system is enabled when the ignition switch is in the RUN position and the transmission is in REVERSE. The system can be disabled by the parking aid switch.
The parking aid system is enabled when the ignition switch is in the RUN position and the transmission is in REVERSE. When the parking aid system is enabled, the audio system volume is cutback, allowing the 750 Hz variable warning tone that is generated from a parking aid speaker to be clearly heard.