Magnum V8-5.7L VIN H (2005)
Audible Warning Device: Description and Operation
Park Assist System
The Park Assist System is an electronic parking aid that alerts the driver to obstacles which are located immediately behind the vehicle. Objects are
sensed using ultrasonic sound waves. When an object is detected, the system will give the driver visual and audible warnings. The system is customer
programmable through the Electronic Vehicle Information Center (EVIC) but will be enabled from the factory as a default.
The major components of the park assist system are:
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Park Assist Module - supplies voltage to the object detection sensors and park assist display. It triggers the sensors, analyzes the echo delay times
and calculates obstacle distances. It sends display information to the park assist display, performs system diagnostics, and communicates via the
Programmable Communication Interface (PCI) date bus network.
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Park Assist Sensors - there are four sensors located in the rear bumper that generate ultrasonic pulses when triggered by the park assist module.
The sensors signal the park assist module when reflected ultrasonic pulses are received.
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Park Assist Display - there are sixteen Light Emitting Diode (LED) indicators which provide indication of relative distance to obstacles. When the
system is engaged and no obstacles are detected, the two outermost yellow LED's are lit at reduced brightness to show the system is working. As
the distance to a detected obstacle decreases, more yellow LED's towards the center of the display illuminate.
For diagnosis and testing of the park assist system, use a scan tool and the appropriate body diagnostic information.
The Park Assist System display activates an audible tone that changes from intermittent to continuous as the final two Light Emitting Diodes (LED's) are
illuminated on one side or both sides of the display.
The system detection length from the rear of the vehicle is 0.3 meters to 1.5 meters. This area extends around the rear side of the vehicle. The system
detection height from the ground is 0.2 meters to about 1.5 meters. The radio mutes when the system activates its audible tone.
When the driver selects Reverse, the system scans for objects behind the vehicle using four sensors located in the rear bumper. A warning display above
the rear window provides both visible and audible warnings indicating the range of the object.
The system is active only when the transmission gear selector is in reverse for vehicle speeds less than 16 Km/h (10 mph). If the vehicle's
Parking/Emergency Brake is applied, the system is deactivated.
The display contains two sets of yellow and red Light Emitting Diode's (LED's) that the driver can see as they look over their shoulder while backing up.
Each side of the vehicle has its own warning LED's. The system provides a visual warning by illuminating one or more yellow LED's as the vehicle gets
closer to the object. As the vehicle continues to approach the object, one red LED is illuminated and the system emits a series of short beeps. The tone
will remain constant and both red LED's are illuminated once the vehicle is within 12 inches (30.5 cm) of the object.
The system can be turned ON or OFF through the Electronic Vehicle Information Center (EVIC) when the vehicle is in PARK. If the park assist system
is turned OFF, a single chime will sound and the EVIC will display the following message "REAR PARK ASSIST OFF", when the vehicle is in reverse.
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Ensure that the rear bumper is free of dirt and debris to keep the system operating properly.
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Jackhammers, large trucks, and other vibrations could affect the performance of the system.
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Ensure that the parking brake is not applied.
If "Service Park Assist System" appears in the EVIC after making sure the rear bumper is clean, proceed to diagnose the system using a scan tool and the
appropriate diagnostic information.
