Door mirror

Fig 1: Identifying Door Mirror

Courtesy of VOLVO CARS OF NORTH AMERICA.

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.

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.