Component description for rear door control unit - GF72.29-P-6021RF

Model 205.0/1/2, 253

Shown: Model 205.0

Fig 1: Identifying Rear Door Control Unit - Shown On Model 205.0

Courtesy of MERCEDES-BENZ USA

Location

The rear door control units are located on the corresponding door module behind the door trim.

Task

The rear door control units have the following tasks:

Reading in of signals

The input factors are read in via the following connections:

Direct line
Left rear door LIN (LIN B9) and right rear door LIN (LIN B10) (with CODE 872 (Seat heater in rear))
Interior CAN (CAN B)

Direct line

The left rear door control unit reads in the signals from the following components over direct lines:

The right rear door control unit reads in the signals of the following components directly:

Left rear door LIN and right rear door LIN (with CODE 872 (Seat heater in rear))

The left rear door control unit reads in the signals of the left rear seat heater button (S51/3) via the left rear door LIN.

The left rear door control unit reads in the signals of the right rear seat heater button (S51/4) via the right rear door LIN.

Interior CAN

The left rear door control unit and right rear door control unit reads in the following signals via the interior CAN:

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components

The following components are actuated by the left rear door control unit via direct lines:

Left rear door central locking motor (A85/3m1)
Left rear door additional door lock actuator motor (A85/3m4) (with code (885) Increased theft protection)
Left rear door exit and warning lamp (E17/5) (with CODE 876 (Interior lights package))
Left rear door handle illumination (E17/13) (with CODE 876 (Interior lights package))
Left rear door outer door handle illumination (E17/23) (with CODE 889 (KEYLESS-GO))
Left rear door ambiance illumination (E17/45) (with CODE 877 (Ambiance illumination))
Left rear door handle ambiance illumination (E17/57) (with CODE 877 (Ambiance illumination))
Left rear power window motor

The following components are actuated by the right rear door control unit via direct lines:

Right rear door central locking motor (A85/4m1)
Left rear door additional door lock actuator motor (A85/4m4) (with code (885) Increased theft protection)
Right rear door exit and warning lamp (E17/6) (with CODE 876 (Interior lights package))
Right rear door handle illumination (E17/14) (with CODE 876 (Interior lights package))
Right rear door outer door handle illumination (E17/24) (with CODE 889 (KEYLESS-GO))
Right rear door ambiance illumination (E17/46) (with CODE 877 (Ambiance illumination))
Right rear door handle ambiance illumination (E17/58) (with CODE 877 (Ambiance illumination))
Right rear power window motor

The rear door control units connect the connected control elements with circuit 58d.

Transmitting signals

The left rear door control unit or right rear door control unit transmits signals via the following connections:

Left rear door LIN and right rear door LIN (with CODE 872 (Seat heater in rear))
Interior CAN

Left rear door LIN and right rear door LIN (with CODE 872 (Seat heater in rear))

The respective rear door control unit sends the status of the seat heater over the rear door LIN to the corresponding rear seat heater button.

Interior CAN

The left rear door control unit or right rear door control unit transmits the following signal via the interior CAN among other things:

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Wiring diagram for left rear door control unit (DCU [TSG])	PE72.29-P-2103-97FBA
Wiring diagram for right rear door control unit (DCU [TSG])	PE72.29-P-2104-97FBA