Description And Operation: Operation

WARNING: This page is about a different car, the 2022 Chrysler Voyager and 2022 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.

The Blind Spot Monitor (BSM) displays provide the vehicle operator with a visual alert that a target vehicle (object of interest) has been detected by the BSM system within one of the BSM or Rear Cross Path (RCP) detection zones. The BSM display is also illuminated momentarily as a bulb check each time the ignition switch status transitions to On as a part of the BSM system self tests. If a BSM display remains illuminated with the automatic transmission gear selector in the Park (P ) position, it indicates that the BSM system has registered a system fault and may require service.

Each BSM display is completely controlled by a hard wired output of the Driver Door Module (DDM) or Passenger Door Module (PDM) on the same side of the vehicle as the display. The DDM and PDM receive electronic messages over the Controller Area Network (CAN) data bus from the Blind Spot Module (BSM) integral to the Radio Detection And Ranging (RADAR) smart sensor for the same side of the vehicle. The display units are grounded at all times through a takeout and eyelet terminal of the body wire harness that is secured to the body sheet metal.

The hard wired circuits between the BSM displays and the DDM or PDM 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 BSM displays or the electronic controls and communication between other modules and devices that provide some features of the BSM displays. The most reliable, efficient and accurate means to diagnose the BSM displays or the electronic controls and communication related to BSM display operation requires the use of a diagnostic scan tool.