Design

Design

Control panels in the driver's door




The control panels in the driver's door are directly connected to the driver door module (DDM). Driver door module (DDM) receives the input signals from the control panels. The control module then carries out the function or transmits the signal on using CAN and LIN communication to the control module which is carrying out 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.

Control panels in the passenger door




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 (onlyS40/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 locks.
The door locks 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 window lift mechanism on the driver's side is operated via the control panel in the driver's door. The window lift mechanism 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 power windows 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) (only the driver's door for the C70). The power windows can be operated when the ignition key is in position I or II. The power 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 which operate the individual windows
The control panels in the passenger door, left rear door and right rear door 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 (only applies to the front windows in the C70):
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).
Instead of child lock switch:
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 following does not apply to the C70: 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.
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 trapping.
Only the front power windows in the C70 have the integrated function to prevent trapping. When AUTO-UP is activated, the window lift mechanism detects whether there is any resistance, i.e. whether too much force is required to close the window. If so, the window stops and then lowers slightly. The anti-trapping system is active during AUTO-UP if the window is open more than 3 mm.
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 window lift mechanisms and Hall sensors in the rear doors can be diagnosed via the control modules in the front doors on the relevant side of the vehicle.

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.
Power seats with memories for the door mirrors are optional equipment. (only S40/V50 2004 and C70). There is more detailed information about this function in Design and Function, power seat module (PSM) (applies to S40/V50) and in Design and Function, Power seat module, left (PSL)/Power seat module, right (PSR) (applies to C70). This function requires that the position of the mirrors is saved when the car is locked. Two sensors in each mirror register the mirror position in the X and Y axes.
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
There are turn signal lamps in both door mirror housings. These are mounted at the ends of the mirror housings. The driver door module (DDM) and passenger door module (PDM) have diagnostics for the outputs for the lights in the 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).