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

GF80.50-P-2004RTU Trigger Anti-Theft Alarm System, Function
- with CODE (551) Anti-theft alarm system (ATA [EDW])
- with CODE (494) USA version

Component Identification:

Function requirements:
^ Anti-theft alarm system (ATA), code 551, activated

Alarm actuation via contact switch
If the
^ rear-end door locking unit,
^ right front door rotary tumbler microswitch (M14/5s1),
^ left front door rotary tumbler microswitch (M14/6s1),
^ left rear door rotary tumbler microswitch (M14/8s1),
^ right rear door rotary tumbler microswitch (M14/9s1) or
^ ATA engine hood switch
exits the non-actuated state for longer than 0.5 s, an acoustic and visual alarm is triggered

Alarm signal horn
The alarm signal horn is a passive component and is actuated by the rear SAM control unit. There is no communication between the rear SAM control unit and the alarm signal horn.

Alarm triggering by towing sensor
If an inclination motion is recognized on the vehicle, an alarm is triggered by the ATA inclination sensor integrated in the rear SAM control unit and is considered to be alarm-relevant.

If the position change (e.g. tire defect) is very slow, the reference position is adapted to the vehicle position to avoid the ATA inclination sensor outputting a false alarm.

Alarm actuation when voltage is too low
The operating voltage of the ATA is between 8.5 V and 15.5 V. It is possible to drop below a value of 8.5 V when the battery discharges continuously If the operating voltage is below 8.5 V, it is no longer possible to output a visual alarm. Due to this fact, an ATA alarm can no longer be output according to the definition.

Alarm memory
Triggered alarms (max. 15) are stored in the rear SAM control unit and the central gateway control unit (N93). The alarm memory can be read out with STAR DIAGNOSIS. The alarm memory of the system diagnosis in the central gateway control unit offers additional information such as window position and operating voltage.

Repeated alarm
An alarm is only repeated when a new alarm procedure is accomplished after the active acoustic alarm is 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.

Acoustic alarm
The acoustic alarm is output by the alarm signal horn. An alarm can be started and stopped by the rear SAM control unit.

Visual alarm
All visual signals are output via the vehicle and interior illumination. The alarm output is controlled by the rear SAM control unit. The type and duration of the visual alarm are stored as performance maps in the rear SAM control unit. The ATA alarm requests have priority over all normal light requests.

The visual signals are output via:
^ the taillamps and rear fog lamps,
^ the front fog lamps (with bi-xenon headlamp unit with integrated curve illumination, code 615)
^ the low beams (except bi-xenon headlamp unit with integrated curve illumination, code 615).