Audi A3

Since 1997 of release

Repair and car operation

Audi A3
+ The maintenance instruction
+ Current leaving and service
+ The engine
+ Systems of cooling, heating
- The power supply system and release of the fulfilled gases
   - The power supply system
      Removal and installation of the fuel pump/gauge of a stock of fuel
      Removal and installation of the fuel filter
      Adjustment of a drive of gas
      Removal and installation of the case of the air filter
      Remote control connection by the fuel pump for carrying out of checks
      Check of the fuel pump
      Check of the relay of the fuel pump
   + System of injection of fuel
   + System of injection of the diesel engine
   + System of release of the fulfilled gases
+ Engine electric equipment
+ Manual box of a gear change
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electroschemes

Check of the fuel pump


The fuel pump is in a fuel tank.

Do not use near to a workplace open fire, do not smoke and do not hold any strongly разогретых subjects. There is a danger of accident! Keep in readiness the fire extinguisher.
Watch normal ventilation of a workplace. Fuel steams are poisonous.
The fuel system is under pressure. At opening of system fuel can be pulled out under pressure. Collect fuel a rag. Use goggles.

Check conditions: the Storage battery should be completely charged, pressure should not be less than 11.5 Century


1. Check up a safety lock № 28 fuel pumps. Replace a faulty safety lock.
2. Quickly include a starter. The fuel pump should earn that is short-term (nearby 1) should be audible. At high level of surrounding noise it is possible to ask to listen the assistant.
3. If the pump does not work, attach remote control.
4. Press the remote control switch. If now the pump works, check up the relay of the fuel pump.

If the pump does not work, it is necessary to operate as follows:
5. Cast away a back seat and turn away a cover of the gauge of a reserve and the fuel pump.
6. Расстыкуйте a socket of the gauge of a reserve and the fuel pump.
7. Attach to both external contacts of the tip диодную a control lamp or the voltmeter.
8. Include remote control. The measuring device should show pressure of the storage battery (nearby 12), otherwise there is a wire breakage which should be revealed by means of the electric scheme and to eliminate.
9. If the device shows pressure of the storage battery, remove the gauge of a reserve of fuel.
10. Check up, whether the flange and the fuel pump are connected by electric wires and whether there is a good contact of connection. Check up an ohmmeter and auxiliary wires, whether there is no wire breakage between the case of the gauge and the fuel pump and if necessary eliminate damage.
11. If breakage is not present, replace the fuel pump.
12. Establish the fuel pump and the reserve gauge, attach electric wires.


1. Uncover a fuel tank for removal of pressure of fuel.


The fuel system is under pressure! Before opening шланговых connections put on it a thick rag. Then cautiously open a hose and remove pressure. Use thus goggles.

2. Disconnect a hose of return of fuel at a fuel distributive highway for what press the button of clearing of quick disconnect connection. 1 – the pipeline of giving of fuel.
3. Attach an auxiliary hose with an intermediate element to the pipeline of return of fuel from the engine and lower it in measuring capacity.
4. Attach the voltmeter to the storage battery.
5. Press during 15 about the remote control switch. Thus consider displayed pressure of the battery and write down it.
6. Compare productivity of the pump to demanded value on the diagramme.

Example: During check pressure of the battery makes 12.5 j pressure on the fuel pump on 2 In less, than pressure of the battery, pressure on the fuel pump makes 10.5 In (12.5 – 2 = 10.5). To this pressure there corresponds productivity of the pump about 130 sm3/15 with.

*) The minimum productivity, sm3/15 with.
**) Pressure on the fuel pump at the idle engine and the working pump (approximately on 2 In less, than pressure of the battery).
7. If pressure of a food is perfectly in order, and productivity all the same is small, check up, whether there are no damages of fuel pipelines or whether they are littered.
8. Check up, whether the fuel filter is littered. For this purpose repeat check of productivity with the new fuel filter.
9. If nevertheless the minimum productivity is not reached, remove the block of giving of fuel and check up, whether the filter grid is littered. If necessary clear a grid.
10. If malfunction is not found, check up the return valve of the fuel pump (work HUNDRED).


If the minimum productivity is reached, but malfunction presence in fuel giving, nevertheless, is supposed (for example, a periodic stop of giving), check up the ampermeter consumption of a current by the pump. Demanded value: макс. 8 A.Esli a current more, replace the fuel pump.
At periodic faults in work of fuel system it is possible to inspect at car movement. The assistant for this purpose is required.

11. Remove remote control and insert into place a safety lock № 28.
12. Screw a cover of a fuel tank.
13. Put into place a back seat.

On the main page