Audi A4

Since 1994 of release

Repair and car operation



Audi А4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ Exhaust system
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
+ Injection system
+ Coupling
+ Transmission and the main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
- Tools and devices
   Check of control tools and bulbs
   The combined device
   Speedometer
   Tachometre
   Hours
   The indicator of quantity of fuel
   The indicator of temperature of a cooling liquid
   Auxiliary devices
   Control bulbs above in the combined device
   Control bulb of a cooling liquid
   Control bulb of level of a brake liquid
   Control bulb of pressure of oil
   Control bulb of indexes of turns
   Control bulbs in devices of the round form (and nearby)
   Control bulb of indexes of turn on the trailer
   Control bulb ASR
   Control bulb of the lock of ignition
   Control bulb of headlights of a headlight
   Control bulb of a pillow of safety
   Control bulb ABS
   Control bulb of a lay brake
   Control bulb of gymnastics of the accumulator
   System of the autocontrol of the car
   Switches
   The ignition lock
   Check of switches
   Alarm buzzer of illumination
   Cigar Lighter
   Warmed back glass
   Check of screen wipers and windscreen
   The engine of screen wipers
   The help at malfunctions
   Gulf of a liquid for washing of glasses
   System of washing of headlights
   Adjustment of a mirror with the electric drive
   The central lock
   window raiser with the electric drive
   Sliding/demountable roof with the electric drive
   Radio receiver
   The aerial on back glass
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics



The central lock

Emergency деблокировка covers of a fuel tank at malfunction of the central lock: remove on the right luggage carrier facing, cast away изоляционную a plate (2), press a fixing clamp (1) servomotors of the central lock and extend back an executive element.

All doors, cover of a luggage carrier and cover of a fuel tank, and also the lock in a luggage carrier cover open and closed by key turn in the lock of a door of the driver or in the lock of a door of the passenger near to the driver. The basic link of system is the so-called double delivery pump which is resulted by the electric motor. At key turn in position "openly" the pump creates an elevated pressure therefore various switching elements in the car remove operating blocking.

With the double delivery pump the block of management of the central lock, and also the management block притивоугонной systems if it is established in the car is combined.

Further the serial central lock is described. Functions of more expensive systems with anticreeping installations, salon protection, infra-red remote control (the Electrotechnical equipment see also the head) in the basic function also are based on this system, as well as «the central lock of safety».

 Council: Feature of the lock of a luggage carrier: in vertical position of the lock of a luggage carrier – irrespective of the central lock – it is always closed. It does not suppose luggage carrier opening by quick thieves at a stop on a traffic light. In horizontal position the luggage carrier lock reacts to the central blocking absolutely normally.

Check of the central lock

 PERFORMANCE ORDER

  1. Door of the driver and the passenger near to the driver or a luggage carrier cover close and open a key.
  2. The central lock should become more active from all three locks.
  3. Approximately in two seconds all locks should be blocked.
  4. If the pump works longer five seconds, the system негерметична – in this case the double delivery pump can work a maximum 35 with after that it should be disconnected.

 Council: If once the central lock has failed, doors and a luggage carrier cover can be opened and closed, as usually, a key. In the same way buttons of blocking of doors can be put in action manually. Only the cover of a fuel tank needs to be deblocked separately: to dismantle the right facing of a luggage carrier. Press on a fixing clamp of a servomotor of the central lock of a cover of a fuel tank and extend an executive element back.

Search of malfunctions in the electrician

The description resulted more low also concerns cars with the standard central lock. Electric check is carried out on 6 and 12-polar штекерном a socket on the double delivery pump. In cars with anticreeping system there is one more 16-polar socket on the pump which at check remains without attention.

If the pump does not work at key turn in the lock of a door of the driver and the passenger near to the driver, in the luggage carrier lock:

 PERFORMANCE ORDER

  1. Check up a safety lock.
  2. Dismantle luggage carrier facing behind and on the right side; the double delivery pump is on the right below near to a bottom of a luggage carrier and is packed into polyfoam.
  3. "Unpack" the double delivery pump.

     Important: in the beginning disconnect from the pump многоштырьковый (ые) a socket () with thin wires – towards the end of a socket with a thick wire (current giving).

  4. Remove a cover 12-shtyrkovogo a socket
  5. Check of a switching element at doors of the driver: connect a control lamp to a socket between contact of a green/dark blue wire and weight of a body.
  6. The control lamp should burn constantly if the door of the driver opens a key. In this case disconnecting contact is perfectly in order.
  7. If the lamp does not light up, at doors of the driver disconnecting contact or not conductivity in a bringing wire is faulty.
  8. Switch a control lamp: instead of weight one of contacts of a control lamp is connected to «+» the accumulator. Other contact remains connected to a socket (contact of a green/dark blue wire).
  9. Close a door of the driver a key.
  10. If now the control lamp burns constantly closing contact of a switching element is perfectly in order.
  11. If the lamp does not light up and there is no defect in a wire the switching element is faulty.
  12. Check of a switching element at doors of the passenger near to the driver: in the disconnected socket of the pump connect a control lamp between contact of a yellow/dark blue wire and weight of a body.
  13. The control lamp should burn constantly if the door of the passenger near to the driver opens a key. In this case disconnecting contact of a switching element is perfectly in order.
  14. If the lamp does not light up, at doors of the passenger near to the driver disconnecting contact or not conductivity in a bringing wire is faulty.
  15. Switch a control lamp: instead of weight one of contacts of a control lamp is connected to «+» the accumulator. Other contact remains connected to a socket (contact of a yellow/dark blue wire).
  16. Close a door of the passenger near to the driver a key.
  17. If now the control lamp burns constantly closing contact of a switching element is perfectly in order.
  18. If the lamp does not light up and there is no defect in a wire the switching element is faulty.
  19. Check of a switching element in the luggage carrier lock: in the disconnected socket of the pump connect a control lamp between contact of a dark blue/red wire and «+» the accumulator.
  20. The control lamp should burn constantly if the luggage carrier lock opens a key. In this case disconnecting contact of a switching element is perfectly in order.
  21. If the lamp does not light up, in the luggage carrier lock disconnecting contact or not conductivity in a bringing wire is faulty.
  22. Switch a control lamp: instead of a dark blue/red wire now one of contacts of a control lamp is connected to a grey/white wire. Other contact remains connected to «+» the accumulator.
  23. Close the lock of a luggage carrier a key.
  24. If the control lamp burns constantly while the key remains in position "is closed", closing contact of a switching element is perfectly in order.
  25. If the lamp does not light up and there is no defect in a wire the switching element is faulty.
  26. Check of the double delivery pump: if work of switching elements of the pump is guaranteed checked up), a cause of defect there is only a current giving (on a thin red wire in 12-shtyrkovom a socket, and also on a thick red/dark blue wire or a thin red/black wire in small 6-shtyrkovom a socket) and connection with weight (a thick brown wire).
  27. If everything is all right the double delivery pump is faulty. Replace.

Here details of a lining of a hose of the central lock are visible

1 – a hose;
2 – a switching element of a door of the passenger near to the driver;
3 – a connecting detail;
4 – a switching element of a door on the right behind;
5 – a tap detail under a back seat;

6 – a switching element of a door of a cover of a fuel tank;
7 – the double delivery pump;
8 – a switching element of a cover of a luggage carrier;
9 – a switching element of a door at the left behind;
10 – a switching element of a door of the driver.


The double delivery pump (2) central locks is established under the right facing of a luggage carrier. Here it "is taken out" from the cover from polyfoam (1). Further you see: electric wires (4) and a delivery/vacuum hose (3) to switching elements.


Under a back seat the central delivery/vacuum hose branches on a plait to the right doors (1) and on a plait to the left doors (2).

Search of malfunctions in pneumatic system

 PERFORMANCE ORDER

  1. For stock-taking негерметичности in the central lock (a sign: the double delivery pump works too long) it is necessary to check up all system consistently.
  2. The double delivery pump: directly at the pump compress a hose flat-nose pliers and thus densely block. Put in action one of locks.
  3. If the double delivery pump at activization of the central lock works longer 3, макс. 7 with., the pump негерметичен. Replace it.
  4. Switching elements in the doorway and covers: serially press all hoses directly about switching elements. For this purpose dismantle corresponding facings (the head of the Detail of a body). Each time make active one of locks.
  5. The double delivery pump at activization of the central lock should not work longer 3, макс. 7 with.
  6. After a detachment of defective (not tight) knot the pump works normally, i.e. it is less 3 with. Replace a faulty detail.

 Council: That at a detachment of hoses not to dismantle all facing, it is possible to press hoses at tap – in the beginning a plait to the right doors, then to the left doors.