GF80.50-P-2004SX Anti-Theft Alarm System Trigger, Function

GF80.50-P-2004SX Anti-Theft Alarm System Trigger, Function
- with CODE (551) Anti-theft alarm system (ATA [EDW])

Component Identification:

Alarm actuation by opening a door, the trunk lid or the engine hood

Function requirements:
^ Anti-theft alarm system (ATA) is activated.

Function
If a switch changes from the non-actuated state, an alarm is triggered. The rear SAM control unit starts an acoustic and visual alarm.

If a locked vehicle is unlocked with the mechanical key and the door is opened, the ATA triggers an alarm.

Alarm actuation due to change of vehicle inclination

Function requirements
^ ATA activated
^ Tow-away protection not previously deactivated

Function
The rear SAM control unit checks with the inclination sensor integrated into the alarm siren the vehicle inclination a number of times each second.
If an inclination change is recognized, an acoustic and optic alarm is triggered.

Each time the ATA is activated, the inclination sensor determines a new reference position with which the relative vehicle inclination is compared during the activated time period.If the maximum vehicle inclination in relation to the reference position is exceeded, an alarm is triggered, at the earliest, 25 s after arming.If the vehicle inclination changes very slowly (e.g. leaky tire), the reference position adapts to the current vehicle position to prevent inadvertent activation.

Alarm actuation by motion in the interior compartment
(with code (882) Interior monitoring (with ATA only))

Function requirements
^ ATA activated
^ Interior protection not previously deactivated

Function
If motion is detected in the vehicle interior by the ultrasonic echo sounder sensor and is considered to be alarm-relevant, an acoustic and visual alarm is triggered.

Rain closing feature (except United States of America)
(On model 216 and on model 221 with code (414) Power glass tilting/sliding roof)
If the SR rain closing and the interior protection features are activated and the sliding/tilting roof (SR) is open, the signals from the ultrasonic echo sounder sensor are ignored by the rear SAM control unit and no alarm is triggered. The remaining ATA sources remain armed and ready for operation.
After completing rain closing, the rear SAM control unit again allows the ultrasonic echo sounder sensor to trigger an alarm. The ultrasonic echo sounder sensor is ignored only once for rain closing during each arming phase.

Alarm actuation by communication breakdown to alarm signal horn

Function requirement
^ ATA activated

Function
The alarm signal horn is polled cyclically by the rear SAM control unit If no answer is received from the alarm signal horn by the rear SAM control unit within approx. 1 s, an alarm is triggered. The alarm is only output visually, as the alarm signal horn cannot be addressed
If the alarm signal horn detects a loss of the supply voltage or communication, it automatically outputs an acoustic alarm.

Alarm actuation caused by power loss

Function requirement
^ ATA activated

Function
If the voltage supply is interrupted when the ATA is armed, an acoustic alarm is triggered.
The power is supplied by the additional battery of the alarm signal horn The rest of the ATA system is out of operation.

Special case: Alarm actuation in the event of undervoltage
The operating voltage of the ATA is between 8.0 V and 16 V. It can drop below a value of 8.0 V when the battery is continuously discharged If the operating voltage drops below 8.0 V, it is no longer possible to trigger a visual alarm.Only an acoustic alarm is triggered. The power is supplied by the additional battery of the alarm signal horn

Repeated alarm
An alarm is only repeated if a new alarm event is registered after the active acoustic alarm was terminated.

Triggering the alarm again results in an extension of the visual and/or acoustic alarm. In the case of repetition the same activation times apply as for a new actuation.

Alarm memory
Triggered alarms (max. 5 ) are stored in the rear SAM control unit and can be read out with STAR DIAGNOSIS.