Central locking system (VW Golf 4)

Location of control units of the central locking system on the car

• 1, 3, 8, 10 - control units in the doors;
• 2, 4, 7, 9 - actuators integrated into door locks;
• 3, 8 - control units in the door with electric windows;
• 5 - fuel filler cap actuator;
• 6 - rear door actuator motor;
• 11 - antenna actuator

Elements of the central locking system that controls the door lock

• 1 - protective cover;
• 2 - door lock button rod;
• 3 - door lock button;
• 4 - inner door opening handle;
• 5 - inner door opening handle rod;
• 6 - actuator electric motor;
• 7 - door lock;
• 8 - lock closing device

The central locking system consists of a control unit, two or four door control units, four door locks, and an electric motor and switch in the boot/tailgate.



[The original article is available at: vwmanual.ru]

When the front doors or the luggage compartment are opened or closed, the central locking system simultaneously opens or closes all the doors, the fuel filler flap and, depending on the position of the luggage compartment lock, this lock as well.

The central locking system also allows you to open either of the two front doors, as well as the luggage compartment, while all other locks remain locked.

In a central locking system with five control devices, if the control device of an individual door fails, the rest of the system remains operational. Also, communication between the central control unit and the control device in the door is carried out only via two wires.

The central locking system includes the following functions:

• central locking of the boot lid/rear door;
• interior lighting control in the cabin;
• remote control;
• hatch control;
• anti-theft device control;
• central locking of rear door locks with electric power windows installed;
• when the airbag is deployed, the door locks are immediately unlocked;
• system self-diagnosis;
• several modes can be used to control door locks.

The control unit in the door performs the following functions:

• performing various door closing functions;
• control of electric windows with closing force limitation;
• electrically adjustable rear view mirrors;
• self-diagnosis of the system.

In a vehicle equipped with a central locking system, the following devices are installed in the door:

• door lock;
• five microswitches transmitting information to the control unit about the position of the door lock. Three microswitches are installed in the rear door lock;
• two door opening handles;
• lock cylinder;
• an electric motor that controls the door lock.