Principles of Operation

The Generic Electronic Module (GEM) controls various systems (such as turn lamps, interior lighting, power door locks, wipers and the battery saver feature) by monitoring inputs from switches, sensors and messages sent from other modules on the Medium Speed Controller Area Network (MS-CAN). Based on the inputs received, the SJB activates outputs. For example, the SJB monitors the door ajar switches. Based on this input, the SJB may provide voltage to the interior lamps.