GF80.50-P-2004FL Anti-Theft Alarm System Trigger, Function
GF80.50-P-2004FL Anti-Theft Alarm System Trigger, Function
- with CODE (551) Anti-theft alarm system (ATA [EDW])
Function requirements, general
^ Antitheft alarm system (ATA) activated
Anti-theft alarm system alarm triggering, general
If one of the alarm inputs of the activated ATA exits its non- actuated state, an alarm is triggered.
Alarm actuation in the event of undervoltage
The operating voltage range of the ATA is defined from U = 8,5 to 15,5 V. If the voltage drops below ≤8.5 V, it is no longer possible to trigger a visual alarm output. Only an acoustic alarm is triggered. The battery voltage is stored in the ATA alarm memory in the rear SAM control unit with fuse and relay module (N10/2).
The ATA alarm triggering comprises the following subfunctions:
^ Function sequence for alarm actuation by opening door, trunk lid (model 212.0), liftgate (model 212.2) or engine hood
^ Function sequence for alarm actuation by changing vehicle inclination (with code (882) Interior monitoring (only with ATA))
^ Function sequence for alarm triggering by motion in interior compartment (with code (882) Interior monitoring (only with ATA))
^ Function sequence for alarm actuation by glass breakage (model 212.2 with code (882) Interior monitoring (only with ATA))
^ Function sequence for alarm triggering due to communication loss with alarm siren (H3/1) (up to 31.5.10, as of 1.6.10 without code (494) USA version)
^ Function sequence for alarm actuation by emergency opening (model 212.0 with code (494) USA version)
^ Function sequence for alarm output
^ Function sequence for alarm interruption
Function sequence for alarm actuation by opening door, trunk lid (model 212.0), liftgate (model 212.2) or engine hood
The rear SAM control unit actuates an alarm as soon as the non- actuated state of one of the following switches is interrupted for t > 0.5 s:
- Left front door rotary tumbler switch (A85s1) in left front door lock (A85)
- Right front door rotary tumbler switch (A85/1s1) in right front door lock (A85/1)
- Left rear door rotary tumbler switch (A85/3s1) in left rear door lock (A85/3)
- Right rear door rotary tumbler switch (A85/4s1) in right rear door lock (A85/4)
- Trunk lid rotary tumbler switch (M14/7s1) (model 212.0) Liftgate rotary tumbler switch (M14/7s1) (model 212.2)
- Engine hood antitheft alarm switch (S62)
The status of the left front door rotary tumbler is read in by the left front door control unit (N69/1).
The status of the right front door rotary tumbler switch is read in by the right front door control unit (N69/2).
The remaining switches are read in by the rear SAM control unit. For a new alarm actuation, the corresponding switch must first change to the non-actuated state (debounce time t = 500 ms).
After a non-actuated state of t = 10 s an alarm can be reactuated by the same switch, if an acoustic alarm is not present.
If a locked vehicle is unlocked with the mechanical key and the door is opened, the ATA triggers an alarm.
Additional function requirements for alarm actuation by changing vehicle inclination (with code (882) Interior monitoring (only with ATA))
^ Tow-away protection not deactivated
Function sequence for alarm actuation by changing vehicle inclination (with code (882) Interior monitoring (only with ATA))
If the inclination sensor integrated into the interior protection control unit and tow-away protection (N26/6) an alarm-relevant change of inclination, an alarm is output. The corresponding signal is read via the rear SAM-LIN (LIN B4) by the rear SAM control unit.
Actuation criterion:
- Change in vehicle inclination (horizontal axis) 1° to 1°, ±0.2°
Alarm is triggered before a wheel looses ground contact when lifting the vehicle.
Additional function requirements for alarm actuation by interior monitoring (with code (882) Interior monitoring (only with ATA))
^ Interior protection not deactivated
Function sequence for alarm actuation during motion in interior compartment (with code (882) Interior monitoring (only with ATA))
The left interior protection transmitter (N26/6b1) and right interior protection transmitter (N26/6b2) transmit ultrasonic signals into the vehicle interior. The ultrasonic signals are received by the interior protection receiver (N26/6a1) which is read in via rear SAM-LIN by the rear SAM control unit.
If a movement in the vehicle interior is recognized and considered to be alarm-relevant, an alarm is output.
During activated rain closing on vehicles with tilting/sliding roof (SR) (with code (414) Power glass tilting/sliding roof) or panoramic roof (with code (413) Panoramic glass roof with top sliding roof), the interior compartment is not monitored. After closing or after expiration of t = 35 s, the interior protection is reactivated.
Function sequence for alarm actuation from glass breakage (model 212.2 with code (882) Interior monitoring (only with ATA))
The rear SAM control unit monitors the status of the following sensors:
- Left rear window glass breakage sensor (B39)
- Right rear window glass breakage sensor (B39/1)
- Rear window glass breakage sensor (B39/4)
If the rear SAM control unit recognizes an interruption in the contact loop in the window, an alarm is triggered.
Function sequence for alarm triggering due to communication loss with alarm siren (up to 31.5.10, as of 1.6.10 without code (494) USA version)
The alarm siren is actuated cyclically approx. every t = 700 ms by the rear SAM control unit with rear SAM-LIN. If a reply to this request is not received within t = 1 s by the alarm siren (no communication), the rear SAM control unit and alarm siren trigger an alarm.
If the alarm siren detects a loss in the supply voltage, it also outputs an acoustic alarm automatically.
An alarm is only repeated if a new alarm event is registered after the active acoustic alarm was terminated.
Function sequence for alarm actuation by emergency opening (model 212.0 with code (494) USA version)
The trunk lid emergency opening switch (S88/10) ensures that the trunk lid can also be opened from the inside of the trunk lid when the vehicle is locked.
The status of the trunk lid emergency opening switch is read in and evaluated by the rear SAM control unit. The ATA triggers an alarm when the trunk lid emergency opening switch is actuated
Function sequence for alarm output
Optical alarm:
The following components of the exterior lights are actuated:
- by the front SAM control unit with fuse and relay module (N10/1):
- Left front turn signal light (E1e5)
- Right front turn signal light (E2e5)
- by the rear SAM control unit:
- Left rear turn signal lamp (E3e1)
- Right rear turn signal lamp (E4e1)
- by the left front door control unit:
- Left outside mirror turn signal lamp (E6/5)
- by the right front door control unit:
- Right outside mirror turn signal lamp (E6/6)
The interior lights are switched on by the front SAM control unit.
Acoustic alarm:
Up to 31.5.10, as of 1.6.10 without code (494) USA version:
The alarm siren is actuated by the rear SAM control unit via the SAM-LIN.
As of 1.6.10 with code (494) USA version:
The left horn (H2) and right horn (H2/1) are actuated via the front SAM control unit and horns relay (N10/1kO).
Function sequence for alarm interruption
An alarm is terminated by unlocking the central locking (ZV) with the transmitter key (A8/1) or by switching on circuit 15C (valid transmitter key is inserted in the electronic ignition lock control unit (N73)).
The electronic ignition switch control unit transmits the corresponding signal with interior CAN to the rear control unit, which then terminates the activated alarm
