Design

Design

Driver's door control panels




The driver door module (DDM) uses LIN communication to communicate with the control panel for power windows and door mirror operation in the driver's door. The central locking control panel in the driver's door in directly connected to the driver door module (DDM). The driver door module (DDM) receives input signals from the control panels, at which time it performs the function or uses CAN or LIN communication to forward the signal to the control module that will perform the function.
The following functions can be controlled via the control panels:
- all power windows
- child-proof lock (only applies to S40/V50)
- all windows up/down (instead of child-proof lock) (only applies to C70)
- operating the door mirrors
- central locking.

Passenger door control panels




The control panels in the passenger door are directly connected to the passenger door module (PDM).
Passenger door module (PDM) receives the input signals from the control panels. The control module then carries out the function or transmits the signal on using CAN communication to the control module which is carrying out the function.
The following functions can be controlled via the control panels:
- power window mechanism in the passenger door
- central locking.

Control panels in the rear doors (Only S40/V50)




The control panels in the rear doors are directly connected to the relevant control module.
The control modules receive input signal from the control panels and then carry out the function.
The following functions can be controlled via the control panels:
- power window mechanism in the respective rear doors.

The door lock
See Design and Function, Central locking.
The passenger door module (PDM) and driver door module (DDM) have diagnostics for the front door lock units.
The lock units for the rear doors (S40/V50) are diagnosed via the control module in the front doors on the relevant side of the vehicle.

The power window mechanism




The power window on the driver's side is operated via the control panel in the driver's door. The power window on the passenger side is operated either via the control panel in the passenger door or via the control panel in the driver's door.
The rear window lift mechanisms can be operated via the control panel in the driver's door or via the left rear door module (LDM) or right rear door module (RDM) (S40/V50).
The window lift mechanisms can be operated when the ignition key is in position I or II. The windows can also be operated from when the ignition is switched off until one of the front doors is opened.
The control panel in the driver's door has four spring-loaded switches that operate the individual windows.
The control panel in the passenger door has a spring-loaded switch for operating the window in the door.
The control panels in the left rear door and right rear door (does not apply to the C30) each have a spring loaded switch to operate the relevant power window.
The switches for the window lift mechanisms in all doors have five positions which control the position of the window:
0) Normal position where the function is passive.
1) step 1 upwards, raises the window for as long as the button is activated.
2) step 2 upwards, automatically fully closes the window (AUTO-UP).
-1) step 1 downwards, lowers the window for as long as the button is activated.
-2) step 2 downwards, fully opens the window automatically (AUTO-DOWN).
The rear window lift mechanisms can be switched off using a child lock switch in the control panel in the driver's door. When the child lock is activated, the rear windows cannot be operated from the rear seats. However, the rear windows can still be operated from the control panel in the driver's door (does not apply to the C30 or C70).
In the C70 the control panel in the driver's door is equipped with a button, which operates all windows up or down.
This switch has three positions that control:
- Normal position where the function is passive.
- Down, automatically operates all windows down (AUTO-DOWN).
- UP, operates all windows up as long as the button is held in.
The window lift mechanisms have a hall sensor which measures the rotation speed of each lift mechanism, allowing the mechanisms to determine the position of the window. If a Hall sensor is not functioning in one of the window lift mechanisms, the AUTO-UP or AUTO-DOWN function for that window is not available.
In all the doors the power window lift mechanism, power window lift motor and Hall sensor and control module form one unit and cannot be replaced separately.
All power window lift mechanisms in the front doors have an integrated function to prevent pinching.
For C70, only the front windows have crushing protection.
When AUTO UP is activated, the power window detects if it meets resistance, that is to say if too great a force must be used to close the window. The window then stops and goes down a bit. Pinch protection is active during AUTO UP if the window is open more than 3 mm (0.1 in).
A diagnostic trouble code (DTC) is stored if for any reason the power window mechanism is unable to determine the window position. If this should happen, the power window mechanism must be re-initialized. This is carried out via a diagnostic function in VIDA.
The passenger door module (PDM) and driver door module (DDM) have diagnostics for the window lift mechanisms and Hall sensors in the front doors.
The rear window lift mechanisms and Hall sensors can be diagnosed via the control modules in the front doors on the relevant side of the vehicle (does not apply to the C30).

Door mirror




Motors
The door mirror motors are operated via the control panel in the driver's door.
The mirrors can be adjusted in the X and Y axes via the two motors for each mirror. Two buttons on the control panel, marked L and R, are used to select either the right or left-hand mirror for adjustment. An LED lights in the button that is activated. Only one button can be activated at any one time (left or right). X and Y axis adjustment is made using a control which maneuvers the mirror in the selected direction for as long as the button is pressed (or until the mirror reaches a limit position). To deactivate the adjustment control, press the left or right button again so that the LEDs are off. The mirrors can be adjusted when the ignition key is in position I or II.
The power seat with memory function for door mirrors is optional equipment (only C70).
This function is described in more detail in Design and Function, Power seat module, left (PSL)/Power seat module right (PSR) (applies to C70).
The function requires that the mirrors' position is saved when the vehicle is locked. Two sensors in each mirror keep track of the mirror position in X-range and in Y-range.
The door windows can be equipped as an option with a motor that allows the mirror housing to be folded in. The motor for folding in the door mirrors is diagnosed and powered by the driver door module (DDM) and passenger door module (PDM) respectively.
The motors and sensors used to set the position of the door mirrors form one unit and cannot be replaced separately.
Heating
The door mirrors contain a heating loop to defrost the glass. The heating loop is on the reverse of the mirror glass. In the event of a fault, the entire mirror glass must be replaced. The heating loops are supplied with power and ground by the driver door module (DDM) and passenger door module (PDM), which also have diagnostics for the loops. However the function is activated by the climate control module (CCM).
Lights in the door mirrors
The door mirrors can be equipped with lamps. The lamps are mounted on the underneath of the mirror housing. The driver door module (DDM) and passenger door module (PDM) have diagnostics for the outputs for the lamps. However the function is activated by the central electronic module (CEM) and the remote control.
Outside temperature
In the left mirror (applies to both left and right-hand drive cars) there is a temperature sensor which measures the outside temperature. The temperature information is used by the driver information module (DIM). The temperature sensor is directly connected to the central electronic module (CEM).
The temperature sensor in the left mirror housing can be replaced separately. The temperature sensor is diagnosed via the central electronic module (CEM).
Turn signal lamps
Each door mirror housing has a turn signal mounted at the end of the mirror housing. The driver door module (DDM) and passenger door module (PDM) have diagnostics for the outputs for turn signal lamps.
However, the function is activated via the left control stalk. A signal is transmitted by the steering wheel module (SWM) to the driver door module (DDM) respectively passenger door module (PDM), via the central electronic module (CEM).

Blind spot information system (BLIS)




The blind spot information system (BLIS) is an auxiliary system designed to help the vehicle's driver when moving sideways. The blind spot information system (BLIS) consists of two cameras integrated in the external rear view mirrors and two LEDs located in the panel at the front of the inside of the respective windows.
The driver door module (DDM) and passenger door module (PDM) communicate with the left camera module (LCM) and right camera module (RCM) via LIN communication.
The blind spot information system (BLIS) is always activated automatically at speeds over 10 km/h (6 mph). The blind spot information system (BLIS) can be deactivated and reactivated using the switches on the comfort panel of the climate control module (CCM). A signal is then sent via the driver door module (DDM) and passenger door module (PDM) to the left camera module (LCM) and right camera module (RCM) with a request to deactivate or reactivate the blind spot information system (BLIS).
When reverse gear is engaged, the blind spot information system (BLIS) is deactivated.

The system reacts to vehicles in the blind spot if:
- the vehicle is traveling past another vehicle with a speed difference of up to 10 km/h
- another vehicle passes with a speed difference of up to 70 km/h.
The blind spot information system (BLIS) can be diagnosed.