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 window lift mechanisms can be operated when the ignition key is in position I or II. The 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 that operate the individual windows.

The control panel in the passenger door has a spring-loaded switch for operating the window in the door.

The control panels in the 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 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 (does not apply to the C30 or C70).

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 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 pinching.

For C70, only the front windows have crushing protection.

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).

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 (Volvo scan tool).

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 rear window lift mechanisms and Hall sensors can be diagnosed via the control modules in the front doors on the relevant side of the vehicle (does not apply to the C30).