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 safety lock (power window and/or door lock)
- 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). The passenger door module (PDM) receives input signals from the control panels, at which time it performs the function or uses CAN to forward the signal to the control module that will perform the function.
The following functions can be controlled via the control panels:
- power window mechanism in the passenger door
- central locking.
Rear door control panels
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.
- Locking each rear door
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 are diagnosed via the control module in the front door of the corresponding 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 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), respectively. Power windows are operable when the ignition switch is in position I or II. They are also operable in the time period between the ignition being turned off and one of the front doors being opened.
The control panel in the driver's door has four spring-loaded switches that 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:
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 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 mechanism, power window motor and Hall sensor form one unit and cannot be replaced separately.
All power window lift mechanisms in the front doors have an integrated function to prevent pinching.
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).
For the automatic window operation to work Driver door module (DDM)/Passenger door module (PDM) must know the window's end-positions and the resistance that the window lift encounters when it operates the window. If the control module loses knowledge about end-positions or assesses its values to be faulty, the automatic window operation stops working and a fault code is set. This is solved by running an initiation.
Initiation can partly occur manually, i.e. by pressing the vehicle's control (without releasing) and operating the window to its upper end-position, and then to the lower end-position in the same way. This gives the control module information about the window's end-positions. As the control module contains a pre-programmed value of the resistance, this should normally be enough.
If the resistance changes for some reason, for example, years of wear, an automatic initiation may be needed. This is done via a diagnostic service under DIAGNOSTICS/CARCOMMUNICATION/Advanced 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 mirrors can be adjusted along the X-axis (right and left) and Y-axis (up and down) via the two motors for each mirror. The motors in the external mirrors are operated via the control panel in the driver's door. 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 done using a control that 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 switch is in position I or II.
Power seat with memory function for external mirrors is optional equipment. This function is described in more detail in Design and Function, Power seat module (PSM). The function requires that mirror position be saved when the vehicle is locked. Two sensors in each mirror keep track of mirror position along the X and Y-axis.
Automatic angling of the door mirror when reverse gear is engaged in is possible in cars produced after structure week 200946. The setting is made in the Infotainment control module (ICM) if the right and/or left-hand door mirror shall go to the end position in the Y-axis. Manual setting of the door mirrors is still possible via the control panel in the driver's door.
The external mirrors can be equipped with a motor for recessing the mirror housing (optional equipment). The motor for recessing is powered by and can be diagnosed by Driver door module (DDM) and Passenger door module (PDM), respectively. Motors and sensor for setting position of external mirror are installed in an integrated 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 bottom of the mirror housing. The outputs to the lamps are supplied power and diagnosed via the driver door module (DDM) and passenger door module (PDM). The function, however, is activated by the central electronic module (CEM) and the remote key.
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 Engine control module (ECM).
The temperature sensor can be replaced individually. The temperature sensor can be diagnosed via the engine control module (ECM).
Turn signals
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 the diodes in the turn signals.
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).