Chime/buzzer - Service Information: Overview Dodge Durango III

DESCRIPTION

Vehicles equipped with the Blind Spot Monitor (BSM) system have an Light Emitting Diode (LED) display unit mounted in the side view mirrors. The body of the displays are concealed to the back side of the side view mirror glass. Only the amber colored triangle is visible on the outer surface of the mirror glass. The BSM display units are an integral part to the mirror glass and are only serviced with the glass. Refer to MIRROR, OUTSIDE REARVIEW, REMOVAL or MIRROR, OUTSIDE REARVIEW, GLASS, REMOVAL and MIRROR, OUTSIDE REARVIEW, INSTALLATION or MIRROR, OUTSIDE REARVIEW, GLASS, INSTALLATION for service information.

Hard-wired circuitry connects the various blind spot monitor system components to each other through the electrical system of the vehicle. These hard-wired circuits are integral to several wire harnesses, which are routed throughout the vehicle and retained by many different methods. These circuits may be connected to each other and to the vehicle electrical system through the use of a combination of soldered splices, splice block connectors, and many different types of wire harness terminal connectors and insulators. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds.

The blind spot monitor system components cannot be adjusted or repaired. If any of the BSM system components are damaged or inoperative, that component must be replaced. For more information on the blind spot monitor system and its components. Refer to DESCRIPTION .

OPERATION

The Blind Spot Monitor (BSM) display units, located within the side view mirrors, provide the vehicle operator with a visual warning indicating that an object has been detected within one of the vehicles detection zones. The BSM display ICON is illuminated immediately if an object of interest is in the detection zone and meets the warning criteria. However, the BSM system will not illuminate the ICON if the object of interest from the rear of the zone and passes the host vehicle at a speed greater that 31mph (50kph), or enters the detection zone from the front of the zone and remains in the zone for less than 1.5 seconds or passes through the zone with a relative speed greater than 12mph (20kph), or if the target vehicle passes the host vehicle in the opposite direction. For more information on the BSM display and other components in the system. Refer to OPERATION .

The Park Assist display is an integral part of the Electronic Vehicle Information Center (EVIC). The park assist ICON , for image information, is only displayed when an object is detected. Refer to INTERNATIONAL VEHICLE CONTROL AND DISPLAY SYMBOLS, DESCRIPTION . An electronic message is sent to the Cab Compartment Node (CCN) from the park assist module, over the Controller Area Network (CAN) Data Bus when an object is within the detection area. The CCN then displays the object detection icon with the corresponding alert bar for the distance and location of the object within the EVIC display.

Depending on market and system capabilities, the display icon has as many as 24 different variations with the corresponding alert bars, depending on size, location and distance of the object being detected. The image will display three solid bars followed by a single tone for maximum distance then will flash and reduce the amount of bars as the proximity to the object is reduced followed by a repetitive tone, down to a single bar with a continuos tone.

The EVIC display is only serviced as a complete unit with the instrument cluster. It cannot be adjusted or repaired. If ineffective or damaged, the entire display unit must be replaced, for more information. Refer to CENTER, ELECTRONIC VEHICLE INFORMATION, DESCRIPTION .

The Park Assist system for this vehicle is only available on vehicles equipped with an Electronic Vehicle Information Center (EVIC). The park assist display is an integrated part of the EVIC and receives battery current and ground from, and is completely controlled by, the Cab Compartment Node (CCN). The CCN will display the park assist ICON whenever an object is detected and a signal is received from the park assist module, over the Controller Area Network (CAN) data bus. The icon image displayed has as many as 24 different variations depending on size, distance and location of the object being detected. The microprocessor in the park assist module 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 hard-wired circuits between components related to the park assist display 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 park assist display or the electronic controls or communication between modules and other devices that provide some features of the park assist system. The most reliable, efficient, and accurate means to diagnose the park assist display or the electronic controls and communication related to park assist display operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

Scheme 1

Blind Spot Module (1) - Vehicles equipped with the blind spot monitor system include a module which is secured to a mounting bracket by two integrated latches and mounted in the electronic module tub (2), located beneath the left front seat assembly where it is concealed beneath a cover panel.

Hard-wired circuitry connects the various blind spot monitor system components to each other through the electrical system of the vehicle. These hardwired circuits are integral to several wire harnesses, which are routed throughout the vehicle and retained by many different methods. These circuits may be connected to each other and to the vehicle electrical system through the use of a combination of soldered splices, splice block connectors, and many different types of wire harness terminal connectors and insulators. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds.

The blind spot monitor system components cannot be adjusted or repaired. If any of the BSM system components are damaged or inoperative, that component must be replaced. For more information on the blind spot monitor system and its components. Refer to DESCRIPTION .

The microprocessor based Blind Spot Monitor (BSM) module is the central component of the BSM system. It receives and analyzes data from the sensors, calculates and communicates the proper information to the Driver/Passenger door module to illuminate the 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 Totally Integrated Power Module (TIPM), and is grounded through a take out and eyelet terminal of the body wire harness that is secured by a screw to the body sheet metal. For more information on the operation of the BSM module and other components in the BSM system. Refer to OPERATION .

The Park Assist Module for this vehicle is secured on the inboard side of the right rear quarter panel behind the interior quarter trim panel. The module is connected to the vehicle electrical system through dedicated take outs of the body wire harness.

Scheme 2

Concealed within the molded plastic park assist module housing (1) is a microprocessor and the other electronic circuitry of the module. The module housing is sealed to enclose and protect the internal electronic circuitry. The module software is flash programmable.

There are three mounting tabs (2 and 5) integral to the module housing that secure the module to the vehicle body. The two lower (5) tabs secure the module in place by engaging two slots in the vehicle body. The upper tab (2) is secured by a push-pin type retainer. Three connector receptacles (3 and 4) containing terminal pins that connect the module to the vehicle electrical system are integral to the one side of the housing. Two of the receptacles are utilized in vehicles equipped with only the rear park assist system, while three receptacles are used on vehicles equipped with both the front and rear park assist systems.

The park assist module cannot be adjusted or repaired and, if damaged or ineffective, it must be replaced.

The microprocessor in the Park Assist module contains the logic circuits that control the park assist system. The module uses On-Board Diagnostics (OBD) and can communicate with other electronic modules in the vehicle as well as with the diagnostic scan tool using the Controller Area Network (CAN) data bus. This method of communication is also used for park assist system diagnosis and testing through the 16-way data link connector located on the driver side lower edge of the instrument panel.

The module provides voltage to each of the park assist sensors located behind the front and rear bumper fascias and to the front and rear park assist displays. The module then monitors return inputs from each of the sensors and the displays on dedicated hard-wired data communication circuits. The sensor inputs allow the module to determine when an obstacle is in the front or rear path of the vehicle and enables the module to calculate the relative location of the obstacle, and whether the distance to that obstacle is increasing or decreasing.

Pre-programmed decision algorithms and calibrations allow the module microprocessor to determine the appropriate park assist system outputs based upon the inputs received from the park assist sensors and electronic messages received from other modules in the vehicle over the CAN data bus. When the programmed conditions are met the module sends electronic messages to the park assist displays over a dedicated serial bus to obtain the proper park assist system visual and audible outputs. The module also broadcasts electronic messages over the CAN data bus to enable the other electronic features of the park assist system.

The park assist module microprocessor continuously monitors all of the park assist system electrical circuits and components to determine the system readiness. If the module detects a monitored system fault, it sets a Diagnostic Trouble Code (DTC) and sends the appropriate electronic messages to the instrument cluster over the CAN data bus to control operation of certain park assist system audible warnings and textual messages displayed in the reconfigurable display of the instrument cluster.

The park assist module receives battery current on a fused ignition switch output (run-start) circuit through a fuse in the Total Integrated Power Module (TIPM). The module receives ground through a ground circuit and take out of the underbody wire harness. These connections allow the module to be operational whenever the ignition switch is in the START or ON positions.

The hard-wired circuits between components related to the park assist module 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 park assist module or the electronic controls or communication between modules and other devices that provide some features of the park assist system. The most reliable, efficient, and accurate means to diagnose the park assist module or the electronic controls and communication related to park assist module operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

Scheme 3

1. Disconnect and isolate the negative battery cable.
2. Remove the right quarter interior trim panel. Refer to «PANEL, QUARTER TRIM, REMOVAL»(ref-465921-S07773746672012042300000) .
3. Disconnect the body wire harness connector (3) from the park assist module connector receptacle (4). Vehicles with the front park assist option will have a second connection to the module at this location, which must also be disconnected.
4. Remove the fasteners that secure the park assist module (1) to the inner quarter panel (2).
5. Remove the module from the vehicle.

Two Blind Spot Monitor (BSM) radar sensors in the rear bumper fascia allow the blind spot monitor system to locate and identify nearby obstacles. The width of the BSM detection zone covers one lane over on both side of the vehicle, approximately 13ft (4.0m). The length of the BSM zone starts at the outside rear view mirror and extends approximately 15ft (4.5m) from the edge of the rear bumper. For more information on the BSM sensors and other components in the system. Refer to OPERATION .

Scheme 4

Note. The sensor brackets are bonded to and integral to the back side of the rear bumper fascia.

1. Disconnect and isolate the negative battery cable.
2. Remove the bumper fascia (1) from the rear of the vehicle. Refer to «FASCIA, REAR, REMOVAL»(ref-465925-S02529825412012042300000) .
3. From the back of the fascia, disconnect the wire harness connector (3) from the blind spot monitor sensor (2) connector receptacle.
4. Carefully pry the sensor bracket latch features away from the top and bottom latch tabs of the sensor far enough to disengage the sensor from the bracket and remove the sensor.

Scheme 5

Note. The sensor brackets are bonded to and integral to the back side of the rear bumper fascia.

1. Align and insert the sensor (6) into the sensor bracket on the back of the rear bumper fascia (2) until the bracket latch features are fully engaged over the top and bottom latch tabs of the sensor.
2. From the back of the fascia, reconnect the wire harness connector (5) to the sensor connector receptacle.
3. Install the bumper fascia onto the rear of the vehicle. Refer to «FASCIA, REAR, INSTALLATION»(ref-465925-S05413430642012042300000) .
4. Connect the negative battery cable.

Scheme 6

Vehicles equipped with the rear park assist system have four park assist sensors (1) installed on the rear bumper fascia. Vehicles with the front park assist system have six additional sensors installed on the front bumper fascia. Only the membrane (4) of each sensor is visible through a hole in the outer vertical surface of the fascia. The remainder of each sensor including the sensor mounting bracket, the sensor spacer and the sensor wiring connection is concealed behind the fascia. A sensor wire harness behind the fascia connects the sensors to the vehicle electrical system.

Each of the sensors is identical in construction and is interchangeable. The electronic circuitry and a communication chip for each sensor is enclosed and protected within the molded black plastic sensor housing. The housing includes an integral connector receptacle (3) and two integral mounting tabs (2). The sensor membrane extends from the surface of the sensor housing, and is either black or is finished to match the outer surface of the fascia or fascia molding.

Scheme 7

The numbering system for the park assist sensors allows for up to twelve sensors on the vehicle, six front and six rear. However, only ten are utilized on this specific vehicle. The sensors are numbered in a clockwise manner starting at the left front bumper. The left front sensor (if equipped with front park assist) is the number 1 sensor. The numbering continues in a clockwise direction around the vehicle, so the left rear sensor is the number 11 sensor.

A resilient O-ring spacer around the circumference of the membrane isolates the membrane from the openings in the fascia or the fascia molding. Each sensor is snapped into its own dedicated molded plastic mounting bracket. Each rear mounting bracket has integral mounting tabs that snap into openings in the horizontal tabs of the molding that extend through slots to the back side of the rear fascia. The front mounting brackets are heat-staked to the back side of the front fascia.

The park assist sensors cannot be adjusted or repaired. If ineffective or damaged they must be replaced. The sensors, the spacers and the four rear sensor mounting brackets are each available for individual service replacement.

The park assist sensors are ultrasonic transceivers that are completely controlled by the park assist module. The sensors transmit and receive ultrasonic signals. The sensors each receive battery current and ground in parallel from the module, but are each connected to individual dedicated serial bus communication circuits to the module.

Each sensor membrane is oscillated, then quieted by the module in a pulsing fashion. While the sensor membrane oscillates, it emits an ultrasonic signal. This signal will bounce or echo off of objects in the path of the vehicle. While quieted, each membrane receives the echoes of the ultrasonic signals it and the other sensors have transmitted. The sensors then communicate this echo data over the serial bus lines back to the module. The microprocessor in the module uses the intervals between the ultrasonic transmission and reception data from the sensors to calculate the distance to any obstacles identified by the ultrasonic echoes.

The hard wired circuits between components related to the park assist sensors 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 park assist sensors or the electronic controls or communication between modules and other devices that provide some features of the park assist system. The most reliable, efficient, and accurate means to diagnose the park assist sensors or the electronic controls and communication related to park assist sensor operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

Scheme 8

Note. The park assist sensors (3) and the sensor spacers (2) are each available for separate service replacement. The sensor brackets (1) are bonded and integral to the back side of the front bumper fascia (4).

1. Disconnect and isolate the battery negative cable.
2. Remove the bumper fascia from the front of the vehicle. Refer to «FASCIA, FRONT, REMOVAL»(ref-465925-S26379879702012042300000) .
3. From the back of the fascia (4), disconnect the wire harness connector from the park assist sensor (3) connector receptacle.
4. Carefully pry the sensor bracket (1) latch features away from the top and bottom tabs of the sensor far enough to disengage the sensor from the bracket.
5. Disengage the O-ring spacer (2) from around the circumference of the sensor membrane protrusion.

The status of the park assist switch is continually monitored by the circuitry within the upper instrument panel switch pod. The switch pod receives battery voltage at all times on a fused battery feed circuit, and a path to ground at all times through the instrument panel wire harness. The inputs to and outputs from the switch pod consist of electronic communication with the instrument cluster, also known as the Cab Compartment Node (CCN) over the single wire Local Interface Network (LIN) data bus.

Each time the park assist switch push button is depressed the switch pod circuitry sends an electronic park assist switch status message input to the CCN over the LIN data bus. The CCN then sends an electronic park assist switch request message to the park assist module over the Controller Area Network (CAN) data bus. The park assist module responds to each park assist switch request message by toggling the status of the park assist system from enabled to disabled, or from disabled to enabled, then sends an electronic park assist system status message back to the CCN over the CAN data bus as confirmation.

The CCN responds to the system status message by sending a message to the switch pod over the LIN data bus to control the park assist switch Light Emitting Diode (LED) unit so that the LED is illuminated with the system disabled and the ignition switch in the ON or START positions, and is extinguished with the system enabled or with the ignition switch in any position except ON or START.

The hard wired circuits between components related to the park assist switch may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the electronic controls or communication between modules and other devices that provide some features of the park assist system. The most reliable, efficient, and accurate means to diagnose the park assist switch or the electronic controls and communication related to park assist switch operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

See also:
• INTERNATIONAL VEHICLE CONTROL AND DISPLAY SYMBOLS, DESCRIPTION