Rear Door Control Unit, Basic Function - GF72.29-P-9892A
Model All (4xWD)
Model All (CAR)
Example illustration of rear door control unit
Overview
This document contains information on:
- General
- Function
- Networking
- Controlling functions
- Evaluated information
- Actuation
General
The left and right rear door control units (1, 2) evaluate the requests of equipment-dependent consumers (e.g. left rear door power window button group) and pass these on in a vehicle-dependent manner to the signal acquisition and actuation module or the front door control units.
Function
Networking
Depending on the vehicle, the left and right rear door control units (1, 2) can be connected in a different manner to the network architecture of the vehicle:
- Directly via its own interface
- In master-slave-combination via the front door control units
Controlling functions
The left and right rear door control units (1, 2) control the following functions:
- Power window assembly.
- Central locking system.
- Side window roller blinds (vehicles with roller sun blinds in rear doors).
- Power closing function (vehicles with power closing function).
Evaluated information
For the implementation of the respective function, the left and right rear door control units (1, 2) evaluate, among other things, the following information:
- Terminal status of terminal 15.
- Lock/unlock central locking system request.
- PRE-SAFE® adjustment request (vehicles with PRE-SAFE® System).
- Convenience feature request.
- Rain closing function request.
- Crash signal.
- Operating requests.
- Status of the microswitches in the door locks.
- Status of the power closing function microswitches (vehicles with power closing function).
Actuation
The left and right rear door control units (1, 2) actuate different actuators in the respective rear door and/or transmit corresponding information and requests to the respectively affected systems. This includes:
- Door status (open/closed).
- Seat heating and seat climate control request (vehicles with seat heating and seat climate control in rear).
- Rear seat adjustment request (vehicles with seat adjustment in the rear).
- Open/close roof roller sunblind request (vehicles with panoramic sliding sunroof).
- Power window assembly actuation.
- Rear passenger compartment side window roller sunblind motor actuation (vehicles with roller sun blinds in rear doors).
- Power closing function motor actuation (vehicles with power closing function).
The left and right rear door control units (1, 2) also protect the respective power window motor against overheating.
The software simulates temperature characteristics depending on the operating time. The parameters required for this purpose are stored in the respective left and right rear door control unit (1, 2).
If the overheating protection is triggered, the actuation of the affected power window motor is blocked for a minimum cooling time.
Exception: The overheating protection function does not operate during roof reversal (after a blockage is detected).
With automatic doors in the rear, an additional rear door control unit that controls the door drive system is fitted on each side of the vehicle.
| Component descriptions | |||
| Component description for rear door control unit | Model 214 | GF72.29-P-6021K | |
| Model 118 as of model year 2023 Model 177, 247 as of model year 2022 |
GF72.29-P-6021L | ||
| Model 294 | GF72.29-P-6021N | ||
| Door control unit component description | Model 223 | GF72.29-P-2011A | |
| Model 243 | GF72.29-P-2011B | ||
| Model 206 | GF72.29-P-2011C | ||
| Model 297 | GF72.29-P-2011D | ||
| Model 295 | GF72.29-P-2011E | ||
| Model 232 | GF72.29-P-2011F | ||
| Model 296 | GF72.29-P-2011G | ||
| Model 254 | GF72.29-P-2011H | ||
| Model 118 as of model year 2023 Model 177, 247 as of model year 2022 |
GF72.29-P-2011L | ||
| Model 167 as of model year 2023 |
GF72.29-P-2011M |