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E90 General Vehicle Electrical
The Anti-Theft Alarm System in the E90 monitors the armed status of the complete
vehicle. The doors, hood, trunk lid, emergency current siren, vehicle interior and the
DWA/K-Bus are monitored. The control/operation of this system is distributed among
several different control modules.
Control Modules for System Operation
Roof Functions Center (FZD)
The Roof Functions Center supplies terminal 30 and terminal 31 to the ultrasonic pas-
senger compartment protection system (interior movement detector). The K-CAN and
DWA bus connections for the ultrasonic passenger compartment protection system are
looped through the FZD, which supplies ground to the DWA LED. The signal from the
ultrasonic passenger compartment protection system is looped through for the DWA
LED.
Ultrasonic Passenger Compartment Sensor (USIS)
Ultrasonic Passenger Compartment Protection System has been adopted from the E65
and adapted to the E90. The function of the anti-theft alarm system is integrated in the
USIS.
Anti-Theft Alarm System (DWA)
Index Explanation Index Explanation
1
Car Access System (CAS 2)
5
Ultrasonic Passenger Compartment Sensor
(USIS)
2
Footwell Module (FRM)
6
Tilt Sensor / Alarm Siren (SINE)
3
Junction Box Electronics Control Module (JBE)
7
Hood Switch
4
Roof Function Center (FZD)
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