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

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

Component Identification:

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

Alarm actuation via contact switch

If
^ the rear-end door locking unit,
^ the right front door rotary tumbler microswitch (M14/5s1),
^ the left front door rotary tumbler microswitch (M14/6s1),
^ the left rear door rotary tumbler microswitch (M14/8s1),
^ the right rear door rotary tumbler microswitch (M14/9s1),
^ the ATA engine hood switch,

only with interior monitoring (with ATA only), code 882:
^ the interior protection sensor (B44),
^ the left rear window glass breakage sensor,
^ the rear window glass breakage sensor

exit the non-actuated state for longer than 0.5 s, an acoustic and optical alarm is triggered.

Alarm actuation with alarm signal horn with additional battery
The alarm signal horn is actuated cyclically by the rear SAM control unit
If no answer is received from the alarm signal horn within approx. 1 s, an alarm is triggered.

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

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 by interior protection (with interior monitoring (with ATA only), code 882)
If a movement in the vehicle interior is recognized and considered to be alarm-relevant, an alarm is output. An alarm actuated by the interior protection sensor is transmitted via the serial interface to the overhead control panel control unit. The overhead control panel control unit relays the alarm via the CAN-B to the rear SAM control unit.

Alarm actuation by glass breakage sensors (with interior monitoring (with ATA only), code 882)
If an interruption of the glass breakage sensor loop is recognized by the interior protection and relayed to the overhead control panel control unit, an alarm is output. The overhead control panel control unit relays the alarm via the CAN-B to the rear SAM control unit.

Alarm actuation by communication loss to alarm signal horn with additional battery (except USA version, code 494)
If a reply from the alarm signal horn with additional battery is not received by the ATA after a cyclic command with three repetitions (the cycle time is between 350 ms and 450 ms), an alarm is output. In the event of communication loss or loss of power supply, the alarm signal horn with additional battery automatically outputs an acoustic alarm.

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

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 an optical 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 diagnosis system in the central gateway control unit offers additional information such as the window position and the 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 optical 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 with additional battery. The alarm is automatically controlled by the alarm signal horn with additional battery. An alarm can be started and stopped by the rear SAM control unit The alarm signal horn with additional battery can trigger an acoustic alarm automatically, due to a communication loss to the rear SAM control unit or due to the loss of supply voltage. The alarm duration is then determined by the alarm signal horn with additional battery.

The type and duration of the alarm is coded via diagnosis and stored in the alarm signal horn with additional battery Diagnosis of the alarm signal horn with additional battery is accessible via the rear SAM control unit. The ATA alarm is started by the rear SAM control unit and terminated by the alarm signal horn with additional battery automatically (exception: alarm interruption).

Optical alarm
All optical 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 optical alarm are stored as maps in the rear SAM control unit. The ATA alarm requests have priority over all normal light requests.

Optical signals are output via:
^ the turn signal lamps,
^ the turn signal indicator lamps and
^ the outside mirror turn signal lamps.