Commander 4WD V8-4.7L VIN N (2006)
Parking Assist Warning Indicator: Description and Operation
Park Assist Display
DISPLAY-PARK ASSIST
DESCRIPTION
The rear park assist display (1) is located in the headliner at the rear of vehicle, just forward of the upper liftgate opening header. The front park assist
display is located in an escutcheon in the center of the instrument panel top pad near the windshield. Only the smoked clear plastic display lens (3) is
visible on the headliner or the instrument panel. The lens prevents the 4 red Light Emitting Diode (LED) units and 12 amber LED units from being
clearly visible unless they are illuminated by the electronic circuitry of the display.
The remainder of the display including the mounting provisions and the electrical connection are concealed above the headliner or below the instrument
panel. A molded plastic housing with an integral connector receptacle (2) contains and protects the electronic circuitry of the display, including an
audible tone transducer and an electronic communication chip.
The rear display has a molded plastic retainer that engages several channels around the housing above the lens. This retainer slides over the display
housing above the headliner substrate to engage and secure the display in the opening in the headliner. The front display has six integral spring clips that
snap through the opening in the molded plastic escutcheon on the instrument panel to secure it in place, while the escutcheon has several integral latch
tabs that snap into the opening in the instrument panel top pad.
The park assist display is serviced only as a complete unit. It cannot be adjusted or repaired. If ineffective or damaged, the entire display unit must be
replaced.
OPERATION
The park assist display provides the vehicle operator with visual feedback by illuminating amber or red Light Emitting Diode (LED) units individually or
in unison, and audible feedback by energizing an audible tone transducer on the display electronic circuit board to emit either an intermittent or a
continuous tone. While the park assist system is active, the number, position and color of the illuminated LED units as well as the audible signal
frequency indicate the relative position and distance of obstacles detected at the front or rear of the vehicle.
The park assist display receives battery current and ground from and is completely controlled by the park assist module. The display also contains an
electronic communication chip that allows bi-directional communication to occur with the park assist module over a dedicated serial bus line. The
microprocessor in the park assist module completely controls the display outputs, continually monitors the display status, and will store a Diagnostic
Trouble Code (DTC) in memory for any monitored fault it detects in the park assist display. The illumination intensity of the LED units is also controlled
by the park assist module based upon internal programming and panel lamps dimming electronic messages received over the Controller Area Network
