Durango 2WD V8-4.7L (2008)
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Turn Signal/Hazard Warning Flasher Emulation - The EMIC relay will generate repetitive clicks at a slow rate to emulate an
electromechanical flasher when the turn signal or hazard warning system are operating. The EMIC relay will generate repetitive clicks at a fast rate
to indicate that the right or left turn signal are operating with one or more bulbs ineffective. In either case, the clicks will continue until the turn
signal and hazard warning systems are turned OFF.
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Turn Signal On Warning - The EMIC transducer will generate repetitive chimes at a slow rate to indicate that a turn signal has been active
continuously for 1.6 kilometers (1 mile) with the vehicle speed greater than 22 kilometers-per-hour (15 miles-per hour). Vehicles built for markets
other than the United States and Canada have a revised distance threshold of 4 kilometers (2.49 miles) for this feature. The chime will continue
until the turn signal input becomes inactive or until the electronic vehicle speed message indicates that the speed is less than 22
kilometers-per-hour (15 miles-per-hour), whichever occurs first. The hazard warning flashers will not activate this chime feature.
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Warning Indicator Announcement - The EMIC transducer will generate one short chime each time the check gauges indicator is illuminated by
the instrument cluster circuitry. The check gauges indicator may be illuminated when any critical engine or transmission systems are operating
outside of their normal parameters. The instrument cluster monitors electronic messages received over the CAN data bus to determine when to
illuminate the check gauges indicator.
The EMIC provides chime service for all available features in the chime warning system. The EMIC relies upon its internal programming, numerous
hard wired inputs, and electronic message inputs received from other modules over the CAN data bus network to provide the chime warning system
features. The internal programming of the EMIC determines the priority of each chime request input that is received, as well as the rate and duration of
each chime that is to be generated.
The hard wired circuits between components related to the chime warning system may be diagnosed using conventional diagnostic tools and procedures.
Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of
wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.
However, conventional diagnostic methods will not prove conclusive in the diagnosis of the chime warning system or the electronic controls or
communication between modules and other devices that provide some features of the chime warning system. The most reliable, efficient, and accurate
means to diagnose the chime warning system or the electronic controls and communication related to chime warning system operation requires the use of
a diagnostic scan tool. Refer to the appropriate diagnostic information.
Park Assist System
PARK ASSIST SYSTEM
The park assist system is active only when the ignition switch is in the ON or START positions, the parking brake is released, the transmission gear
selector lever is in the REVERSE position and the vehicle speed is less than 16 kilometers-per-hour (10 miles-per-hour). In vehicles equipped with this
option, the system is enabled from the factory as a default. The system can be manually disabled and enabled by the vehicle operator using the customer
programmable features option of the Electronic Vehicle Information Center (EVIC) in the overhead console.
Reasons for disabling the system include trailer towing and off road use. With a trailer attached to the vehicle the audible and visible park assist alerts
would be incessant whenever the gear selector lever was in the REVERSE position due to the proximity of the trailer to the rear of the vehicle. Similarly,
operating the vehicle off road may cause the park assist alerts to become distracting due to the proximity of large trees or boulders and the extreme rear
approach angles that may be encountered while maneuvering on off road trails or terrain. When the system is disabled, a PARK ASSIST DISABLED
textual message will appear in the EVIC display whenever the gear selector lever is in the REVERSE position.
The microprocessor based park assist module is the central component of the park assist system. It supplies voltage to the park assist sensors and the
park assist display, receives and analyzes data from the sensors, calculates and communicates the proper display information to the park assist display,
performs system diagnostics, and communicates with other electronic modules in the vehicle or with a diagnostic scan tool over the Controller Area
Network (CAN) data bus. The module operates on battery voltage received through a fuse in the Junction Block (JB), and is grounded through a take out
and eyelet terminal of the body wire harness that is secured by a screw to the left inner D-pillar.
Four ultrasonic park assist sensors in the rear bumper fascia allow the park assist system to locate and identify the proximity of nearby obstacles. These
sensors each generate ultrasonic sound pulses when triggered by the park assist module, then signal the module when an echo of the reflected sound
pulses is received. The detection distance range from the rear of the vehicle is about 0.3 meters (11.8 inches) to about 2.0 meters (80 inches), and the
detection height range from the ground is about 0.2 meters (7.8 inches) to about 0.8 meters (31 inches). The detection area extends somewhat around
both rear sides (corners) of the vehicle.
The park assist display unit provides the vehicle operator with both visible and audible warnings indicating the relative range of a detected object. The
display is visible to the vehicle operator over an inboard shoulder when looking rearward while backing the vehicle up, but is not visible in a properly
adjusted inside rear view mirror when looking forward. The display contains two sets of eight Light Emitting Diode (LED) indicator units, one set
dedicated to each side of the vehicle, and an audible chime tone transducer. The LED units are concealed beneath a smoked oval lens and are not clearly
visible when they are not illuminated. When the park assist system is active and no obstacles are detected, the two outermost, amber LED units in the
display are illuminated at a reduced intensity to provide visual confirmation that the system is operating.
The display provides a visual indication of a detected object by illuminating one or more LED indicators, amber first followed by red, moving toward the
center of the display as the vehicle gets closer to the object. As the vehicle comes to within about 40 centimeters (31 inches) of the object, 1 red LED is
illuminated and the display emits a series of short, intermittent, audible beeps. If the audio system is turned ON, the audio output will be muted
