GF80.50-P-2004CA Anti-Theft Alarm System Trigger, Function
GF80.50-P-2004CA Anti-Theft Alarm System Trigger, Function
- with CODE (551) Anti-theft alarm system (ATA [EDW])
Function requirements, general
^ Antitheft alarm system (ATA) activated
ATA 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 on-board electrical system voltage drops to below U = 8.5 V, it is not possible to output a visual alarm. 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 actuating alarm by opening door, trunk lid or engine hood
^ Function sequence for actuating alarm resulting from vehicle inclination (with code (882) Interior monitoring (only with ATA))
^ Function sequence for actuating alarm resulting from motion in the passenger compartment (with code (882) Interior monitoring (only with ATA))
^ Function sequence for actuating alarm resulting from communication loss to alarm siren (H3/1) (on model 207.3 up to 31.5.10, model 207.3 as of 1.6.10 without code (494) USA version, model 207.4 without code (494) USA version)
^ Function sequence for alarm output
Function sequence for actuating alarm by opening door, trunk lid or engine hood
The rear SAM control unit actuates an alarm as soon as the nonactuated 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)
- Trunk lid rotary tumbler switch (M14/7s1) in trunk lid central locking motor (M14/7)
- Engine hood antitheft alarm switch (S62)
The left front door control unit (N69/1) directly reads in the status of the left front door rotary tumbler switch and transmits it to the rear SAM control unit via the interior CAN (CAN B).
The right front door control unit (N69/2) directly reads in the status of the right front door rotary tumbler switch and transmits it to the rear SAM control unit via the interior CAN (CAN B).
The rear SAM control unit directly reads in the status of the trunk lid rotary tumbler switch and the status of the engine hood antitheft alarm system switch.
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.
Trunk lid emergency opening (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 then 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 actuating alarm by changing vehicle inclination (with code (882) Interior monitoring (only with ATA))
If the inclination sensor in the interior protection and tow-away protection control unit (N26/6) (model 207.3) or interior protection sensor (master) (A26/13) (model 207.4) recognizes an inclination motion around the horizontal vehicle axis of angular = 1° up to - 1° ( ± 0.2°), a corresponding signal is transmitted via the rear SAM-LIN (LIN B4) to the rear SAM control unit, which then actuates an alarm.
Alarm is recognized 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 actuating alarm by motion in the passenger compartment(with code (882) Interior monitoring (only with ATA))
The interior compartment on model 207.3 is monitored by the interior protection and tow-away protection control unit with ultrasonic waves and on model 207.4 by the interior protection sensor (master) and interior protection sensor (slave) (A26/15) with radar waves
Model 207.3:
If the inclination sensor integrated into the interior protection and tow-away protection control unit recognizes an alarm-relevant inclination motion via the interior protection receiver (N26/6a1) , a corresponding signal is relayed via the rear SAM-LIN to the rear SAM control unit, which then actuates an alarm.
On vehicles with panoramic roof (with code (413) Panoramic glass sunroof top sliding roof) the interior compartment is not monitored during active rain closing. After closing or after expiration of t = 35 s the interior protection is reactivated.
Model 207.4:
The interior protection sensors operate according to the master- slave principle. The interior protection sensor (Master) is located below the center console and monitors the front interior compartment. The interior protection sensor (slave) is located below the rear stowage compartment and monitors the rear passenger compartment. The interior protection sensor (master) evaluates all relevant data.
If the interior protection sensor (master) recognizes an alarm relevant motion, it transmits a corresponding signal via the rear SAM-LIN to the rear SAM control unit, when then actuates an alarm.
Function sequence for actuating alarm resulting from communication loss to alarm siren (on model 207.3 up to 31.5.10, model 207.3 as of 1.6.10 without code (494) USA version, model 207.4 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 output
The alarm output comprises the following partial functions:
^ Function sequence for actuating hazard warning system
^ Function sequence for actuating interior illumination
^ Function sequence for acoustic alarm
Function sequence for actuating hazard warning system
When an ATA [EDW] alarm is triggered, the rear SAM control unit requests the hazard warning flashing function via the interior CAN.
The request must be transmitted cyclically so that the flasher frequency results from the bright time and the cycle time. The front SAM control unit with fuse and relay module (N10/1) receives the request, generates the corresponding flasher frequency and transmits it to the corresponding control units via the interior CAN.
The following components are actuated:
- By the front SAM control unit:
- Left front turn signal lamp (E1e5)
- Right front turn signal lights (E2e5)
- By the rear SAM control unit:
- Left rear turn signal lights (E3e1)
- Right rear turn signal lights (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)
- From the instrument cluster (A1):
- Left turn signal indicator lamp (A1e1)
- Right turn signal indicator lamp (A1e2)
Function sequence for actuating interior illumination
When an ATA [EDW] alarm is triggered, the rear SAM control unit requests the activation of the interior illumination via the interior CAN. The following components of the vehicle interior illumination are actuated by the front SAM control unit:
- Right front footwell lamp (E17/15)
- Left front footwell lamp (E17/16)
- Rear interior lamp (E15/3e3) in rear dome lamp (E15/3) (on model 207.3)
- Left front interior lamp (N70/3e4) and right front interior lamp (N70/3e5) in overhead control panel electronic system (N70/3)
Function sequence for acoustic alarm
Model 207.3 up to 31.5.10, model 207.3 as of 1.6.10 without code (494) USA version, model 207.4 without code (494) USA version): The acoustic alarm is output via the alarm siren.
The alarm siren is actuated by the rear SAM control unit via the rear SAM-LIN.
If the alarm siren detects a loss in the supply voltage, it also outputs an acoustic alarm automatically.
Model 207.3 as of 1.6.10 with code (494) USA version or Model 207.4 with code (494) USA version:
The acoustic alarm is output by the left horn (H2) and right horn (H2/1). The horns are actuated by the front SAM control unit via the horn relays (N10/1kO). The rear SAM control unit transmits the corresponding request to the front SAM control unit via the interior CAN.
Abort conditions:
An activated alarm is interrupted by opening the central locking (CL) of the vehicle with the transmitter key (A8/1) or by switching on c. 15C (valid transmitter key inserted into electronic ignition switch control unit (N73))
The electronic ignition switch control unit transmits the corresponding signal with interior CAN to the rear SAM control unit, which then terminates the activated alarm
