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Home >> Volvo >> 2009 >> XC70 Base >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Electrical Modules And Components - Design And Function - 2 Of 5 >> Driver Door Module (DDM) / Passenger Door Module (PDM) (2008-2012) >> Design >> Door Mirror

Door Mirror

Fig 1: Door Mirror
GLL154463Courtesy of VOLVO CARS CORPORATION

Motors 

The door mirror motors are operated via the control panel in the driver's door.

The mirrors can be adjusted along 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 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.

The power seat with memory function for door mirrors is optional equipment.

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 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 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 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 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).