Brake Lamp: Description and Operation

GF82.10-P-3010G Brake Light Actuation, Function
MODEL 463.306 /336 /346 up to 31.5.12 as of model year 2011 /YoM 10
MODEL 463.202 /222 /236 /237 up to 31.5.12 as of model year 2009 /YoM 08
MODEL 463.247 /248 /249 /254 up to 31.8.08 as of model year 2007
MODEL 463.270 /271 /303 /340 /341 up to 31.5.12 as of model year 2007





1 Brake light switch status
2 BAS release switch status (gasoline engine only)
3 Redundant request for brake light (gasoline engine only)
4 Request for brake light
5 Actuation of brake light
A7/7s1 BAS release switch (gasoline engine only)
E3e4 Left stop light
E4e4 Right stop light
E21 Center high-mounted brake lamp
N10/2 Rear signal acquisition and actuation module (SAM)
N28/1 Trailer recognition control unit (with code (Q55) Trailer hitch with reinforced low ball head)
N30/4 ESP control unit
N73 EZS control unit
S9/1 Brake light switch
X58 Trailer hitch socket, 13-pin (with code (Q55) Trailer hitch with reinforced low ball head)
B Interior CAN
C Drive train CAN

Function requirements:
^ Circuit 15 On

Brake light actuation function sequence
Operation of the service brake is detected by the brake light switch and read-in directly by the ESP control unit.
The ESP control unit then sends the "Brake light ON" request to the EZS control unit via the drive train CAN (CAN C). This routes the request via the interior CAN (CAN B) and it is then read in by the rear SAM.The "Brake light ON" request is then sent redundantly to the rear SAM via a direct line.
The rear SAM then actuates the brake lights and the center high-mounted brake lamp.
The request is also forwarded via the interior CAN to the trailer recognition control unit, which then actuates the brake lights on the trailer via the trailer hitch socket (13-pin). vehicles with a gasoline engine, operation of the service brake is also detected by the BAS release switch and read in directly by the ESP control unit. This signal is transmitted directly to the rear SAM.