Backup Lamp: Description and Operation

GF82.10-P-3011G Backup Lamp 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 Selector lever position
2 Actuation of backup lamp
E7 Backup lamp
N10/2 Rear signal acquisition and actuation module (SAM)
N15/5 Electronic selector lever module control unit
N28/1 Trailer recognition control unit (with code (Q55) Trailer hitch with reinforced low ball head)
N73 EZS control unit
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

Backup lamp actuation function sequence
The electronic selector lever module control unit determines the current selector lever position and forwards it to the EZS control unit via the drive train CAN (CAN C).
This routes the information via the interior CAN (CAN B), where it is read in by the rear SAM and the trailer recognition control unit.
The rear SAM actuates the backup lamps.
The trailer recognition control unit actuates the backup lamp on the trailer via the trailer hitch socket (13-pin).
To avoid any brief lighting up when the selector lever is shifted from the "P" position to "D" via "R", the request is only sent from the EZS control unit when the request has been pending for more than t = 500 ms.