Antitheft and Alarm Systems: Description and Operation

GF82.10-P-3016A Trailer Antitheft Device, Function

MODEL 203
- with CODE (551) Anti-theft alarm system (ATA [EDW])
- with CODE (550) Trailer hitch up to Model Year 8
MODEL 215, 220.02 /06 /07 /12 /16 /17
- with CODE (551) Anti-theft alarm system (ATA [EDW])
- with CODE (550) Trailer hitch







Trailer antitheft device, function
1 interior CAN.
2 Trailer right stop lamp
3 Trailer left stop lamp
H3/1 Alarm signal siren with additional battery
N10/1 Front SAM control module with fuse and relay module (Model 203)
N10/2 Rear SAM control module with fuse and relay module (model 203)
N10/6 Left front SAM control module (models 215, 220)
N10/7 Right front SAM control module (models 215, 220)
N10/8 Rear SAM control module (models 215, 220)
N28/1 Trailer recognition control module
X58 Trailer hitch socket (13-pin)

Operating procedure
Basic conditions:
- The trailer recognition control module (N28/1) has detected the coupled trailer.
- The vehicle is locked and the antitheft alarm system (ATA) primed.
- The trailer recognition control module has detected the activated ATA.

1 The trailer recognition control module monitors the trailer's stop lamps (2 and 3) by applying current to them cyclically.
2 The electronics of the trailer recognition control module (N28/1) detects a discontinuity in the stop lamp circuit and immediately sends via the interior CAN the "Alarm" signal to the rear SAM control module with fuse and relay module (N10/2) or to the rear SAM control module (N10/8).
3 The rear SAM control module with fuse and relay module (N10/2) or rear SAM control module (N10/8) evaluates the signal and triggers the acoustic and optical alarm:

The rear SAM control module with fuse and relay module (N10/2) or rear SAM control module (N10/8) actuates the alarm signal horn with additional battery (H3/1) and rear lighting devices directly for an acoustic and optical alarm display.

Model 203
Actuated by the interior CAN, the front SAM control module with fuse and relay module (N10/1) triggers the optical alarm display of the front lighting devices.

Models 215/220
Actuated via the interior CAN, the left front SAM control module and right front SAM control module (N10/6 and N10/7) trigger the optical alarm display of the front lighting devices.