Audi A4

since 1994 release

Repair and operation of the car

Window regulators with the electric drive

The mode of functioning of window regulators decides not only switches, but also the control unit of window regulators on a support on additional relays under a control panel at the left.

Functioning: at the included ignition glass at doors of the driver or passenger near the driver slides up or down to an emphasis by short pressing or a switch otzhatiya. Thus the movement of glass stops if shortly to press a key in an opposite direction.

For safety reasons such comfortable way of inclusion in back doors exists only for glass descent.

At the switched-off ignition when pressing the button all glasses move against the stop only down. Glass moves up only if the window regulator key is pressed.

Protection of children: window regulators with the electric drive in back doors are blocked by the central switch in an armrest of a door of the driver.

Anti-theft device: if at the switched-off engine the door of the driver opens and is again closed, all window regulators are disconnected.

Comfortable closing: in all cars where there are window regulators with the electric drive, they can be closed at the same time when closing a door of the driver and the passenger's door near the driver. For this purpose it is necessary to take slightly more long a key in situation "is closed". In the presence of a sliding roof with the electric drive it too thus is closed.

Protection when jamming: If at rise up glass encounters an obstacle, it begins at once the movement in the opposite direction and falls by some centimeters.

Malfunctions

PERFORMANCE ORDER

If any glass does not move, check automatic switches in nests 22 and 23 in "a 8-seater support of the relay" under a control panel for conductivity at the left.
Check of switches: If only one window regulator does not work, try to put it in action from the second switch.
Thus you will be able to establish, whether there is no malfunction source in the first switch.
Such inspection cannot be carried out with glass at the driver's doors. Remove facing of a door.
For the sake of experience trade places sockets of switches so that glass at doors of the driver was put in action by definitely serviceable switch.
Check of the bringing wire: if the switch as it should be, disconnect the wire socket in the engine of a window regulator and check the voltmeter the socket, whether on a window regulator the correct signals really arrive.
If tension indicators correct, a source of defect there is an engine of window regulators.
But if on the engine tension does not move, check a wire and the control unit.
The bad movement of glass can be a consequence jammed directing windows.

Table of measuring sizes of window regulators

Nominal sizes on the example of a window regulator of a door of the driver are specified in the table (cars with four window regulators).

On back glasses and in cars with two window regulators wires of other flowers are partially laid (see footnotes).

Plug	Color of a wire	Measurement is relative	Condition	Nominal size	It is measured
1	The red/grey	"masses"	"Ignition incl." or the door is not closed after the last time, when "Ignition incl."	Apprx. 12 V	Tension from the block unitary enterprise - a ravleniye
2	The white/yellow	masses	no	Apprx. 12 V	Signal tension "The central closing"
2	The white/yellow	masses	Keeping of a key in the door lock in situation "Is closed"	Apprx. 12 V	Signal tension "The central closing"
3	Yellow/blue¹⁾	masses	"Ignition incl." or the door is not closed after the last time, when "Ignition incl."	Apprx. 12 V	Switching signal "The window is opened"
4	Black/yellow²⁾	masses	"Ignition incl." or the door is not closed after the last time, when "Ignition incl."	Apprx. 12 V	Signal of switching "The window is closed"
5	The black	masses	"Ignition incl."	Apprx. 12 V	Tension from the ignition lock
6	The brown	«+»	no	Apprx. 12 V	Connection to weight
7	The red/green	masses	no	Apprx. 12 V	Constantly ±

¹⁾either green/yellow, or white/black
²⁾either black/red, or white/black, or white/lilac

Temporary help on the way

For window regulators with the electric drive any mechanical emergency control is not provided. But if window regulators do not work, you do not need to go with an open window:

PERFORMANCE ORDER

If the switch is faulty, try to close a window by means of the second switch.
If it did not turn out (for example, at the driver's doors), dismantle the switch of other window or connect a connecting wire to the second, serviceable switch (about dismantle of switches in this chapter above).
By means of this serviceable switch you will be able to close a window.
If the engine of a window regulator is faulty, it can be dismantled, having removed facing of a door. For this purpose weaken tightening connection between a window and a window regulator (screws on a reverse side – the head Detali of a body).
Now shift glass up and record in this situation with the help of an adhesive tape or a wooden wedge.

Replacement of the engine of a window regulator

Engines of window regulators are dismantled the same as mechanical elevators (the head Detali of a body). In installation of the engine of a window regulator important programming of an emphasis:

PERFORMANCE ORDER

Include ignition.
By means of the switch lift glass up to an emphasis.
Now several times within a second take the switch in the situation "top".
Check: press the switch in a position "down". Now glass has to fall itself down to an emphasis.
Repair of the electric motor is not provided.

The engine (1) window regulator with the electric drive with the disconnected socket (2) and three fixing screws (3-5).

Here the socket (2) engines (1) window regulator to carry out an inspection by means of the voltmeter and a control wire (3), whether the correct signals is removed
arrive on a window regulator.