Front Door Control Modules
The driver door module (DDM) and the passenger door module (PDM) are broadly similar in terms of functionality. Both these control modules are described in common in this document. In those cases the differences between the driver door module (DDM) and the passenger door module (PDM) are given. The main task of both control modules is to manage:
- the power window mechanism
- the door lock
- door mirror adjustment
- door mirror folding
- door mirror heating
- approach lighting
- turn signals in the door mirrors
- Blind spot information system (BLIS)
The control modules are in their respective doors. The driver door module (DDM) is on the driver's side. The passenger door module (PDM) is on the passenger side. The control modules are integrated with the power window lift motors. The control modules must also be replaced when replacing the power window lift motors.
The driver door module (DDM) and passenger door module (PDM) communicate with directly connected components and with other control modules and components connected via CAN communication.
The driver door module (DDM) communicates with the control panel in the driver's door via LIN communication.
The Driver door module (DDM) and Passenger door module (PDM) communicate with the control module for the rear doors on its respective side of the vehicle via LIN communication (does not apply to the C30).
Both control modules check activations and input and output signals via an integrated diagnostic system. A diagnostic trouble code (DTC) is stored if either of the control module detects a fault.
The diagnostic trouble codes (DTCs) for the control modules in the rear doors are stored in the respective control module in the front doors (does not apply to the C30).
Any diagnostic trouble codes (DTCs) are stored in the relevant control module memory. The data can be read off.
A simple way to ensure that the control modules are powered and grounded is to activate one of the functions that are operated via the switches on the control panels in the respective door. The control module is powered and grounded if any of the functions are working.
For further information, see SIGNALS .