Commander 2WD V6-3.7L VIN K (2006)
(CAN) data bus.
When the ignition switch is turned to the ON position, all 16 of the LED units in the display will illuminate in unison for approximately 1 second as a
bulb test. This output will be interrupted if the system is active and senses an obstacle. Following the conclusion of the bulb test, when the system is
active but no obstacle is detected, the display will indicate system readiness by illuminating the two outermost amber LED units (1) at a reduced
intensity. As an obstacle is detected, the outermost amber LED unit (5) on the side of the vehicle where the obstacle was detected will be illuminated at
normal intensity. Then additional amber LED units (6) will begin illuminating inward (2 or 4) as the obstacle gets closer until, finally, the two red LED
units (7) are illuminated.
Park Assist Display Outputs
When the final red LED unit (3) is illuminated, the obstacle is approximately 40 centimeters (16 inches) from the front or rear bumper and an
intermittent audible tone will be generated. The frequency of the audible tone will increase as the obstacle continues to become closer until the tone is
continuous when the obstacle is about 30 centimeters (12 inches) from the front or rear bumper. Whenever a park assist audible tone is being generated,
the park assist module sends electronic messages to the radio over the Controller Area Network (CAN) data bus to mute the audio system. The audible
tone will be cancelled after about two seconds if the detected distance to the obstacle remains constant. See the Park Assist Display Outputs table for
additional details.
The hard wired circuits between the park assist display and the park assist module may be diagnosed and tested using conventional diagnostic tools and
procedures. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the park assist module, the park assist display, the
CAN data bus or the electronic message inputs to or outputs from the display. The most reliable, efficient, and accurate means to diagnose the park assist
display, the park assist module, and the electronic message communication between the display and the module requires the use of a diagnostic scan tool.
