Design

Design

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 power window mechanism




The window lift mechanism on the driver's side is operated via the driver door module (DDM). The window lift mechanism on the passenger side is operated either via the passenger door module (PDM) or via the driver door module (DDM).
The window lift mechanisms in both rear doors can be operated via the driver door module (DDM). The window lift mechanisms in the front and rear doors can be operated when the ignition key is in position I or II. The power windows can be operated from when the ignition is switched off until one of the front doors is opened.
The driver door module (DDM) has four spring loaded switches which operate the individual front and rear windows.
The passenger door module (PDM) has a spring loaded switch which operates the window in the front passenger door. The switches in the driver door module (DDM) which control the rear windows can only be activated up or down. The rear windows move up or down for as long as the switch is activated.
The switches for the front windows 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 windows are powered via the central electronic module (CEM). However they can be disabled using a child lock switch on the driver door module (DDM). When the child lock is activated, the rear windows cannot be operated from the rear seats. They can still be operated however from the driver door module (DDM).
The front window lift mechanisms have a Hall sensor which measures the rotation speed of each lift mechanism, allowing them 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. The power window lift mechanism, power window lift motor and Hall sensor form one unit and cannot be replaced separately.
The window lift mechanisms in the front doors have an inbuilt 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.

Door mirror





Motors
The motors for the door mirrors are operated via the driver door module (DDM).
The mirrors can be adjusted in the X and Y axes via the two motors for each mirror. Two buttons on the driver door module (DDM), 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-hand 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. There is more detailed information about this function in Design and Function, power seat module (PSM). 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. This function has been available as an option since structure week 199950.
The door windows can be equipped as an option with a motor that allows the mirror housing to be folded in. The driver door module (DDM) and passenger door module (PDM) have diagnostics for the motor for folding in the door mirrors. However the activation signal is transmitted by the climate control module (CCM).
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
As an option, the door mirrors can be equipped with lights. The lights 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 lights. However the function is activated by the upper electronic module (UEM) and the remote control.

Outside temperature
In the right-hand mirror (applies to both left and right-hand drive cars) there is a temperature sensor which measures the outside temperature. This temperature data is used by the combined instrument panel.

Note! This temperature sensor must not be confused with the temperature sensor in the left-hand mirror housing which is used by the engine control module (ECM).

The temperature sensor in the right-hand mirror housing can be replaced separately. The passenger door module (PDM) (or driver door module (DDM) on right-hand drive cars) has diagnostics for the temperature sensor.

Door open warning lamp




There is a door open warning lamp in each front door which lights when the door is opened. The lamps are supplied with power via the driver door module (DDM) and passenger door module (PDM).
Since structure week 199950 door open warning lamps are no longer installed.
The driver door module (DDM) and passenger door module (PDM) have diagnostics for the door open warning lamps.