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Functional networking

A complex system network with distributed functions residing in additional control units is needed to implement the anti-theft alarm system's functionality. The following illustration shows the functional networking.

Fig 1: Car Access System - Circuit Diagram
G10036083Courtesy of BMW OF NORTH AMERICA, INC.
Index Explanation
1 Engine compartment lid contact switch
2 Footwell module (FRM)
3 DWA lamp on interior rearview mirror
4 Car Access System (CAS)
5 Junction Box Electronics (JBE)
6 Front passenger-door lock
7 Microwave sensor, passenger's door
8 Microwave sensor in right side panel
9 Rear power distribution box
10 Terminating resistor
11 Siren with tilt alarm sensor (SINE)
12 Tailgate lock
13 Microwave sensor in left side panel
14 Microwave sensor, driver's door
13 Driver's door lock