The single lock is driven by an electric motor. It consists of one central control unit, two or four door control units, four door locking units, and motors and switches for the trunk lid or tailgate locks. Further information on the single lock is provided in the subsection Single Lock - General Information and Vacuum Hoses.
Data exchange between control devices occurs via the so-called CAN bus (via dial-up lines). CAN is an abbreviation for Controlled Area Network and means that the control units are connected to each other in a single network. For example, the connection between the central control unit and the door control unit is via two wires. Without the CAN bus, the connection would be via 14 cables. Thanks to this, the electronic system takes up little space and weighs little.
The door control devices form a unit together with the electric window lift motors. The unit controls the following functions of the electric window lifts:
- Automatic raising and lowering of door windows.
- Manual control of raising and lowering the door windows while the driver's door switch is pressed.
- Stops glass movement as soon as the switch is pressed a second time.
- The window glass can be controlled for 10 minutes after the ignition is turned off.
- Locking windows with a door key.
- Anti-pinch protection in the area from 4 to 200 mm below the upper window seal. If the glass encounters an obstacle, such as a hand, during its upward movement, the protection mechanism returns the glass to its previous position. Anti-pinch protection consists of a Hall sensor located on the door control unit board and a ring magnet on the motor axis. The door control unit detects a decrease in the motor speed via the Hall sensor (when an obstacle to movement occurs) and changes the polarity of the voltage on the engine, i.e. turns on the reverse.
Warning: The anti-pinch protection may be deactivated if the window lift is operated twice within 5 seconds after the window has stopped moving.
After a power failure of the door control unit, for example due to a battery failure, the control unit must again remember the end positions of the glass. Otherwise, automatic operation of the window is not possible, see subsection Removal and installation the battery.
The door control unit also performs functions for controlling the adjustment of the exterior mirror and its heating.
The central control unit is located in the instrument panel block and performs the following functions:
- Locking the trunk lid with a single lock.
- Power supply for trunk lighting.
- Power supply and automatic timed shutdown of interior lighting, reading light and cosmetic lamp.
- Switch off after 30 sec: if the key was removed from the ignition switch or the door was opened and closed again.
- Switching off after 10 minutes: if the ignition was switched off and one or more doors are open.
- Switch off after 1 hour: if the interior light was switched on manually and the ignition was switched off.
- The interior lighting turns on automatically for 10 minutes if the airbag control unit detects an impact signal during an accident.
- Anti-theft alarm.
- Power supply for front and rear turn signals.
- Power supply for heated rear window.
- Remote control.
The remote control has a range of about 7 m, under favorable conditions up to 10 m.
Data transmission from the transmitter on the key to the receiver in the car is indicated optically by means of an LED on the key switch. Built-in batteries provide approximately 5,000 keystrokes.
If the LED does not light when you press the switch, the batteries need to be replaced.
The windows and sliding sunroof panel cannot be closed remotely.
The remote control receiving antenna is located in the A-pillar of the vehicle on the driver's side. The A-pillar is the first pillar of the car body, against which the driver's door rests.
The open/close command of the remote control is confirmed by the central control unit by briefly flashing. If the central lock is opened by means of the remote control and a door or the boot lid/tailgate is not opened, the vehicle is automatically locked again after 30 seconds.
The article was copied from the website: audimanual.ru