The general instructions on self-diagnostics of system of injection. Audi A4 (from 2001 to 2005 release)
Service of Audi A4 from 2001 to 2005 release.
1. Operation and maintenance of the car
2. Engine
2.1. General information
2.2. Predvaritlny checks
2.3. Mekhanichsky part (petrol engines 2,0l)
2.4. Lubrication system
2.5. Cooling system
2.6. System of injection
2.6.1. Removal and installation of a turbocharger
2.6.2. Removal and installation of the vacuum block of a turbocharger
2.6.3. Adjustment of the vacuum block of a turbocharger (the turbocharger is removed)
2.6.4. The general instructions on self-diagnostics of system of injection
2.6.5. Decrease in high pressure of fuel
2.6.6. Removal and installation of a flowmeter of air
2.6.7. Removal and installation of an inlet collector with a fuel stage
2.6.8. Removal and installation of a fuel stage (Rail)
2.6.9. Removal and installation of nozzles
2.6.10. Check of pressure of fuel and residual pressure in front of the pump of high pressure
2.6.11. Check of residual pressure
2.6.12. Removal and installation of the pump of high pressure
2.6.13. Replacement of the control unit of the engine
2.6.14. Removal and installation a lambda probe in front of the catalyst
2.6.15. Removal and installation a lambda probe after the catalyst
2.6.16. The fuel tank (front-wheel cars – all models with MPI engines and 2,0 l of FSI)
2.6.17. Pumping of fuel from a tank
2.6.18. Removal and installation of the fuel tank with hinged details
2.6.19. Electric check of the fuel pump
2.6.20. Check of amount of the fuel given by the fuel pump (cars from the 4th the cylinder engine with a free admission)
2.6.21. Check of amount of the fuel given by the fuel pump (atomobil with the engine of 1,8 l Turbo)
2.6.22. Check of amount of the fuel given by the fuel pump (atomobil from the 4th the cylinder FSI engine)
2.6.23. Check of amount of the fuel given by the fuel pump (cars from 6 the cylinder MPI engine)
2.6.24. Removal and installation of knot of supply of fuel
2.6.25. Fuel tank (all-wheel drive cars till 10:04)
2.6.26. Pumping of fuel from a tank
2.6.27. Removal and installation of knot of a pedal of an accelerator with sensors of provision of a pedal
2.7. System of production of the fulfilled gases
2.8. Mechanical part (petrol engines 3,0; 3,2 l)
2.9. Mechanical part (petrol engines of 4,2 l)
2.10. Mechanical part (diesel engines of 2,0 l)
2.11. Tables
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
9. Schemes of electric equipment
 







2-6-4-obshhie-ukazaniya-po-samodiagnostike-sistemy-vpryska.html

2.6.4. The general instructions on self-diagnostics of system of injection

The control unit of the engine is equipped with self-diagnostics function. Before repair, and also for search of malfunctions first of all it is necessary to interview memory of malfunctions. It is also necessary to check vacuum hoses and connections (an air suction through thinnesses).
Fuel feeding hoses need to be fixed in a motor compartment only by spring collars. Application of tightening or screw collars is inadmissible.
Excellent job of electric knots requires tension not less than 11,5 Century.
Do not use silikonosoderzhashchy sealants. The traces of silicone components which are soaked up by the engine do not burn down in the engine and damage a lambda probe.
Cars are equipped with the device of interruption in supply of fuel at accident. It has to reduce danger of fire of the car after blow thanks to the fact that the fuel pump is switched-off by means of the relay of the fuel pump.
Along with the help of this device also improvement of parameters of process of launch of the engine is reached. When opening a door of the driver the fuel pump is started on 2 with for creation of pressure in fuel system, at the same time it is necessary to observe security measures.
Before opening of system of injection of high pressure it is necessary to adhere to the following operations procedure surely

Fig. 2.227. Block of safety locks


For safety reasons before opening of fuel system if by joint stock bank it is not disconnected, it is necessary to take out a safety lock of the 28th control unit of the fuel pump as the fuel pump turns on by means of the door switch of illumination of a door of the driver (fig. 2.227).

NOTE
The safety lock is in a block of safety locks on the dashboard.

By removal of a safety lock 28 plug 30 power supply for the control unit of the fuel pump stops.

ATTENTION
The system of injection is divided into a contour of high pressure (at most about 110 bars) and a contour of low pressure (about 6 bars).

Before opening of a contour of high pressure, for example, for removal of the pump of high pressure, a fuel stage, a nozzle, the fuel highway or the sensor of pressure of fuel, it is necessary to reduce fuel pressure to residual pressure прибл. 6 bars. The operations procedure is for this purpose described below.

Specifications


2.6.3. Adjustment of the vacuum block of a turbocharger (the turbocharger is removed)

2.6.5. Decrease in high pressure of fuel