Audi A4

since 1994 of release

Repair and car operation



A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
+ injection System
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ ignition System
+ Lighting
+ Alarm equipment
- Tools and devices
   Check of control tools and bulbs
   The combined device
   Speedometer
   Tachometer
   Hours
   Indicator of amount of fuel
   The indicator of temperature of cooling liquid
   Auxiliary devices
   Control bulbs above in the combined device
   Control bulb of cooling liquid
   Control bulb of level of brake liquid
   Control bulb of pressure of oil
   Control bulb of indexes of turns
   Control bulbs in devices of a round form (and nearby)
   Control bulb of indexes of turn on the trailer
   Control bulb of ASR
   Control bulb of the lock of ignition
   Control bulb of headlights of a driving beam
   Control bulb of a safety cushion
   Control bulb of ABS
   Control bulb of the parking brake
   Control bulb of a battery charging
   System of autocontrol of the car
   Switches
   Ignition lock
   Check of switches
   Alarm buzzer of lighting
   Lighter
   Warmed back glass
   Check of screen wipers and stekloomyvatel
   Engine of screen wipers
   The help at malfunctions
   The liquid gulf for washing of glasses
   System of washing of headlights
   Mirror adjustment with the electric drive
   Central lock
   Window regulators 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





Central lock

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

All doors, trunk lid and cover of a fuel tank, and also the lock in a trunk lid 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 the driver. The main link of system is the so-called double delivery pump which is given by the electric motor. At key turn in situation "openly" the pump creates an elevated pressure therefore various switching elements in the car remove operating blocking.

With the double delivery pump the control unit of the central lock, and also the control unit of pritivougonny system 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 (see also head the Electrotechnical equipment) in the main 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 allow luggage carrier opening by quick thieves at a stop on a traffic light. In horizontal situation the lock of a luggage carrier reacts to the central blocking absolutely normally.

Check of the central lock

 PERFORMANCE ORDER

  1. Door of the driver and the passenger near the driver or a trunk lid 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 more long than five seconds, the system is not tight – in this case the double delivery pump can work at most 35 with after that it should be disconnected.

 Council: If once the central lock failed, doors and a trunk lid can be opened and closed, as usual, 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 provided below also belongs to cars with the standard central lock. Electric check is carried out on 6-and the 12-polar shtekerny 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 unattended.

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

 PERFORMANCE ORDER

  1. Check a safety lock.
  2. Dismantle luggage carrier facing behind and on the right side; the double delivery pump is on the right below near 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 mnogoshtyrkovy (ые) I will corrode (ы) with thin wires – in the end I will corrode with a thick wire (current giving).

  4. Remove a cover of the 12-shtyrkovy socket
  5. Check of a switching element at doors of the driver: connect a control lamp to the socket between contact of a green/dark blue wire and mass of a body.
  6. The control lamp should burn constantly if the door of the driver opens a key. In this case disconnecting contact as it should be.
  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 the 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 as it should be.
  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 the driver: in the disconnected socket of the pump connect a control lamp between contact of a yellow/dark blue wire and mass of a body.
  13. The control lamp should burn constantly if the door of the passenger near the driver opens a key. In this case disconnecting contact of a switching element as it should be.
  14. If the lamp does not light up, at doors of the passenger near 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 the socket (contact of a yellow/dark blue wire).
  16. Close a door of the passenger near the driver a key.
  17. If now the control lamp burns constantly, closing contact of a switching element as it should be.
  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 lock of a luggage carrier opens a key. In this case disconnecting contact of a switching element as it should be.
  21. If the lamp does not light up, in the lock of a luggage carrier 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 gray/white wire. Other contact remains connected to «+» the accumulator.
  23. Close the luggage carrier lock a key.
  24. If the control lamp burns constantly while the key remains in situation "is closed", closing contact of a switching element as it should be.
  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), a cause of defect there is only a current giving (on a thin red wire in the 12-shtyrkovy socket, and also on a thick red/dark blue wire or a thin red/black wire in small 6-штырьковом the 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 laying of a hose of the central lock are visible

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

6–a switching element of a door of a cover of a fuel tank;
7–double delivery pump;
8–a switching element of a trunk lid;
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) of the central lock 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 leakage stock-taking in the central lock (a sign: the double delivery pump works too long) it is necessary to check all system consistently.
  2. 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 more long 3, Max. 7 pages, the pump is not tight. Replace it.
  4. Switching elements in the doorway and covers: serially press all hoses directly about switching elements. For this purpose dismantle the corresponding facings (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 more long 3, Max. 7 pages.
  6. After a detachment of defective (not tight) knot the pump works normally, i.e. less than 3 pages. Replace a faulty detail.

 Council: In order that at a detachment of hoses not to dismantle all facing, it is possible to press hoses at branch – in the beginning burn down to the right doors, then to the left doors.