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. For service information, refer to MIRROR, OUTSIDE REARVIEW, REMOVAL and MIRROR, OUTSIDE REARVIEW, GLASS, REMOVAL and MIRROR, OUTSIDE REARVIEW, INSTALLATION and MIRROR, OUTSIDE REARVIEW, GLASS, INSTALLATION .
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 is only displayed when an object is detected. For image information, 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 continuous 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: Vehicles equipped with the Blind Spot Monitor (BSM) system, includes a module that is secured to a mounting bracket within the right inner quarter panel. Concealed beneath the inner quarter trim panel, the module is secured to the mounting bracket by two push-pin type retainers.
Hard-wired circuitry connects the various blind spot monitor system components to each other through the vehicle electrical system. 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 .
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 .
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 .
The status of the park assist controls are continually monitored by the Integrated Center Stack (ICS) Screen (1), also known as the U-Connect Touch ™ screen module. The ICS 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 ICS consist of electronic communication with the Body Control Module (BCM) over the Controller Area Network (CAN) data bus.
Each time the park assist controls are used the ICS circuitry sends an electronic park assist switch status message input to the BCM over the CAN data bus. The BCM then sends an electronic park assist switch request message to the park assist module over the 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 BCM over the CAN data bus as confirmation.
The BCM responds to the system status message received from the ICS, by sending a message to the IC over the CAN-C data bus to display Park assist system off in the Electronic Vehicle Information Center (EVIC) display; when the system has been disabled by the vehicle operator. The Park assist system off message will display each time the ignition switch is in the ON or START positions, and remain that way until a bus message is received that the system has been enabled.
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.