System Overview

System overview

Control module




The driver door module (DDM) and the passenger door module (PDM) are broadly similar in terms of functionality. The information in this document is common to both the driver door module (DDM) and the passenger door module (PDM) unless otherwise indicated. 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
- Outside temperature measurement
- Local lighting
- Door open warning lamp.
The control modules are in their respective doors. The driver door module (DDM) is on the driver's side and the passenger door module (PDM) is on the passenger side. The switches for the power windows are mounted directly on top of the control modules. The appearance and physical versions of the two control modules is different.
The driver door module (DDM) and passenger door module (PDM) communicate with directly connected components and with other control modules and components connected via Controller area network (CAN) communication.
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.
Any diagnostic trouble codes (DTCs) are stored in the relevant control module memory. The data can be read off using VIDA.
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 driver door module (DDM) or passenger door module (PDM). The control module is powered and grounded if any of the functions are working.
For further information, also see Signal specifications.

Signals
The following table summarizes the input signals to and output signals from the driver door module (DDM) and the passenger door module (PDM). The signal types are divided into directly connected signals and Controller area network (CAN) communication. The following illustration displays the same information with the Volvo component designations.