Overview
This document contains the following information:
Location
Networking
Controlling functions
P72.29-2937-78
1 | Left rear door control unit | 2 | Right rear door control unit |
Location
The rear door control units are located in each case in the door module behind the door trim.
Networking
Depending on the vehicle, the rear door control units can be differently connected 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 rear door control units have 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).
For the implementation of the respective function, the rear door control units 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).
The rear door control units actuate different actuators in the respective rear door and/or transmit the 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).
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 rear door control units also protect the respective power window motor against overheating.
The software simulates temperature characteristics depending on the operating time. The necessary parameters for this are stored in the respective rear door control unit.
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).