Backup lamp actuation, function - GF82.10-P-3011G

MODEL 463.306 /336 /346 as of model year 2011 /YoM 10

MODEL 463.202 /222 /236 /237 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 as of model year 2007

Fig 1: Backup Lamp Actuation Function Diagram

Courtesy of MERCEDES-BENZ USA

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.

Component description for rear SAM control unit with fuse and relay module	N10/2	GF54.21-P-6030G
Component description for trailer recognition control unit	N28/1 With code (Q55) Trailer hitch with reinforced low ball head	GF31.19-P-4050G
Electronic ignition/starter switch control unit (EZS), component description	N73	GF80.57-P-6000G