Anti-theft alarm system trigger, function

P80.50-2374-06

Alarm inputs

A26/14 Interior protection transmitter and receiver (with code (882) Interior monitoring (with ATA only))

A26/15 Interior protection transmitter and receiver (slave) (with code (882) Interior monitoring (with ATA only))

B33 ATA inclination sensor
(as of 1.6.06 not  and )

H3/1 Alarm signal siren

N10/2 Rear SAM control unit with fuse and relay module

N28/1 Trailer recognition control unit
(with code (550) Trailer hitch)

N70 Overhead control panel control unit

N72/1 Upper control panel control unit

S17/3 Left door contact switch

S17/4 Right door contact switch

S62 ATA [EDW] hood switch

-----------------------------------------------------------------------------------------

S62/7 Glove box switch (ATA [EDW])

S88/4 Pawl rotary tumbler switch

X58 Trailer hitch socket, 13-pin (with code (550) Trailer hitch)

CAN Controller Area Network bus,
class B (interior compartment) (CAN B)

-----------------------------------------------------------------------------------------

Function requirements:

 Anti-theft alarm system (ATA) is activated.

Alarm actuation via contact switch

If the

 Left door contact switch (S17/3)

 Right door contact switch (S17/4)

 ATA hood switch (S62)

 Glove box switch, ATA (S62/7)

 Pawl rotary tumbler switch (S88/4)

exits its non-actuated state for longer than 0.5 s, an alarm is triggered.

The rear SAM control unit with fuse and relay module (N10/2) initiates an acoustic and a visual alarm.

-----------------------------------------------------------------------------------------

Alarm actuation with alarm signal siren (H3/1)

The alarm signal siren (H3/1) is actuated cyclically by the rear SAM control unit with fuse and relay module (N10/2). If the alarm signal siren (H3/1) does not respond within 1 s, the rear SAM control unit with fuse and relay module (N10/2) outputs a visual alarm.

Vehicles except  and  as of 1.9.06:

If the alarm signal siren (H3/1) detects loss of the supply power or the communication itself, it automatically outputs an acoustic alarm.

-----------------------------------------------------------------------------------------

Alarm actuation by tow-away protection
(as of 1.6.06 not  and )

The rear SAM control unit with fuse and relay module (N10/2) checks the input of the ATA inclination sensor (B33) several times per second. If the ATA inclination sensor (B33) detects a position change of the vehicle, an alarm is triggered.

The tow-away protection function can trigger a maximum of three alarms in sequence. Then the ATA must be reactivated for realizing this function.

-----------------------------------------------------------------------------------------

Alarm triggered by interior protection

(with code (882) Interior monitoring (with ATA only))

The alarm decision is accomplished by considering the duration and the speed of the motion in the interior compartment. If the interior protection transmitter and receiver (A26/14) or the interior protection transmitter and receiver (slave) (A26/15) detects a break-in into the vehicle, the rear SAM control unit with fuse and relay module (N10/2) outputs an acoustic and a visual alarm.

The interior protection function can trigger a maximum of three alarms in sequence. Then the ATA must be reactivated for realizing this function.

-----------------------------------------------------------------------------------------

Alarm actuation by trailer monitor

(with code (550) Trailer hitch)

The lines are monitored for discontinuity by applying a control voltage from the trailer recognition control unit (N28/1) to trailer loads.

If a line interruption is detected, the status "Trailer not recognized" is transmitted to the rear SAM control unit with fuse and relay module (N10/2) via CAN B (CAN).

It then starts an acoustic and a visual alarm.

Acoustic alarm

The acoustic alarm is output via the alarm signal siren (H3/1).

Alarm duration

All countries: approx. 30 s

-----------------------------------------------------------------------------------------

Visual alarm

The alarm output is actuated by the rear SAM control unit with fuse and relay module (N10/2). The type of alarm and alarm duration are stored in the rear SAM control unit with fuse and relay module (N10/2).

Alarm duration

Vehicles with  version: approx. 150 s

Other countries: approx. 300 s

Interior illumination actuation

The interior illumination is switched on by the overhead control panel control unit (N70), without dimming, for the duration of the visual alarm.

-----------------------------------------------------------------------------------------

Actuation of exterior lights (not )

The visual alarm is accomplished when the

 left turn signal lamp and right turn signal lamp are actuated by the front SAM control unit with fuse and relay module,

 left turn signal lamp and right turn signal lamp are actuated by the rear SAM control unit with fuse and relay module (N10/2),

 left outside mirror turn signal lamp is actuated by the left door control unit,

 the right outside mirror turn signal lamp is actuated by the right door control unit

for the duration of a visual alarm.

Actuation of exterior lights ()

The visual alarm is accomplished when the

 the left taillamp and parking lamp and the right taillamp and parking lamp are actuated by the rear SAM control unit with fuse and relay module (N10/2),

 left front fog lamp and right front fog lamp are actuated by the front SAM control unit with fuse and relay module

for the duration of a visual alarm.

Alarm interruption

The alarm can be interrupted by actuating the "Lock" or "Unlock" buttons on the transmitter key.

When interrupted by actuation of the "Lock" button the ATA remains active.