Principles of Operation
The parking aid system detects objects behind the vehicle when the vehicle is in REVERSE. The parking aid module does this by calculating the distance to an object using 4 ultrasonic sensors mounted in the rear bumper. The ultrasonic field is emitted in a semicircular area around the rear of the vehicle. The parking aid sensors can detect objects approximately 1.8 m (6.0 feet) to the rear of the vehicle, 50 cm (1.6 feet) to the rear side of the vehicle, and 16 cm (6 inches) above ground. A 750 Hz variable warning tone is generated from a parking aid speaker attached to the parking aid module. The parking aid speaker increases its warning tone rate as the vehicle gets closer to an obstacle. When an object is detected within 20 cm (8 inches) of the sensors, the warning tone becomes continuous.
The parking aid system is enabled when the ignition switch is in RUN or START position and when REVERSE is selected. The system can be disabled through the parking aid disable switch.
The parking aid module will prove out the indicator, located in the parking aid disable switch, by constantly illuminating the indicator for 3 seconds. If the parking aid module detects a failure it constantly illuminates the indicator for as long as the failure condition exists and the ignition switch is in the RUN position. 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 1040 (RD/BK). The parking aid module is grounded through circuit 57 (BK).
The parking aid system is enabled when the vehicle ignition is in RUN and REVERSE 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 disable 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 vehicle ignition is in RUN and REVERSE 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 disable 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 disable switch.
The parking aid system is enabled when the vehicle ignition is in RUN and the transmission is in REVERSE. The system can be disabled by the parking aid disable 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 57 (BK).