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E90 General Vehicle Electrical
• 3 sec. after arming or closing the last door, trunk lid or hood
- Initialization of the tilt alarm sensor starts (current position of the vehicle is deter-
mined and stored as a reference).
- Initialization of the ultrasonic interior motion sensor is started. As part of the initial-
ization procedure, an ultrasonic field is built up in the vehicle interior and compared
to the reference models. The sensitivity is then set corresponding to the positions
of the windows and sunroof.
Note: Opening the trunk lid during the initialization interrupts the proce-
dure. Initialization is restarted after closing the trunk lid.
• 20 sec. after closing the hood, trunk lid or last door
- Following its initialization, the ultrasonic interior sensor is adopted in the alarm
table.
• 30 sec. after closing the hood, trunk lid or last door
- Following its initialization, the tilt alarm sensor is adopted in the alarm table.
The tilt alarm sensor is masked out if no feedback telegram is received from it
within 60 sec. after arming
Deactivating Tilt Alarm & USIS
It is advisable to deactivate the tilt alarm sensor and USIS in the following situations:
• Vehicle on ship transport
• Vehicle on car transporter
• Persons or animals in vehicle
Deactivation takes place by resetting the central arrest within 10 sec. after the central
arrest or convenient closing function. Feedback is provided by the DWA LED lighting for
2 seconds.
Note: The tilt alarm sensor or ultrasonic passenger compartment sensor
can be permanently deactivated by way of coding.
Disarming the Anti-Theft Alarm System
The anti-theft alarm system is disarmed by the "unlock" or "selective unlock" central
locking functions.
An audible and/or visual signal can be output in connection with disarming corresponding
to the country-specific version.
The DWA LED flashes for 5 min if an alarm was triggered during the time the anti-theft
alarm system was armed.
If the system is disarmed during the alarm, the action is not acknowledged but rather the
alarm is terminated.
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