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

MODEL 216.3, 221.0 /1 up to Model Year 8

Shown on model 221

Fig 1: Identifying CAN Communication Diagram Of Backup Lamp Actuation

Courtesy of MERCEDES-BENZ USA

Function requirements:

Circuit 15 ON

Function

The status of the gear selector switch is read in by the steering column module, which transmits the "engage drive position R" request over the chassis CAN to the CDI control unit or to the ME-SFI [ME] control unit as well as to the central gateway control unit.

Transmission 722.6

The ETC [EGS] control unit receives the request over the drive train CAN from the CDI control unit or from the ME-SFI [ME] control unit, engages the drive position "R" and transmits the "drive position R engaged" information back to the CDI control unit or to the ME-SFI [ME] control unit.

Transmission 722.9

The servo module for DIRECT SELECT receives the request over the drive train CAN from the CDI control unit or from the ME-SFI [ME] control unit and instructs the VGS control unit to engage drive position "R".

The VGS control unit engages drive position "R" and forwards the "drive position R engaged" information back over the drive train CAN to the CDI control unit or to the ME-SFI [ME] control unit.

The CDI control unit or the ME-SFI [ME] control unit transmits the "drive position R engaged" information to the central gateway control unit. The central gateway control unit forwards this information over the interior CAN to the rear SAM control unit. The rear SAM control unit actuates the backup lamps.

Vehicles with code (550) Trailer hitch

The "drive position R engaged" information is additionally sent by the central gateway control unit over the interior CAN to the trailer recognition control unit which actuates the corresponding trailer lamps over the trailer hitch socket.

Intelligent servo module (ISM) component description	A80 Transmission 722.6	GF27.19-P-4015SXA
Intelligent servo module (ISM) component description	Transmission 722.9	GF27.19-P-4015SX
ME-SFI [ME] control unit, component description	N3/10 Model 216 with engine 273.961 Model 221 with engine 272.965, 273.961	GF07.61-P-6000V
Rear SAM control unit with fuse and relay module, component description	N10/2	GF54.21-P-6030SX
ETC [EGS] control unit, component description	N15/3 Transmission 722.6	GF27.19-P-4018G
Trailer recognition control unit component description	N28/1 Model 221 with code (550) Trailer hitch	GF31.19-P-4050SX
Electronic ignition/starter switch control unit (EIS) component description	N73	GF80.57-P-6000SX
Steering column module component description	N80	GF54.21-P-6050SX
Central gateway control unit, component description	N93	GF54.21-P-4170SX
Gear selector switch, component description	S16/13 Transmission 722.6	GF27.19-P-5148SXA
Gear selector switch, component description	Transmission 722.9	GF27.19-P-5148SX
VGS control unit, component description	Y3/8n4 Transmission 722.9	GF27.19-P-4016SX