E39 series BMW 5

since 1996-2001 of release

Repair and car operation

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
- Power supply system and release
   - Power supply system
      Economy of fuel at movement
      Rules of observance of purity at work with fuel system
      Check of the relay of the fuel pump
      Check of productivity of the fuel pump
      Removal and installation of the sensor of a reserve of fuel and fuel pump
      Removal and installation of the case of the air filter and measuring instrument of weight of air
   + System of injection of the petrol engine
   + Power supply system of the diesel engine
   + System of production of the fulfilled gases
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Schemes
+ System of onboard diagnostics

Check of productivity of the fuel pump

Petrol engine

At the diesel engine pressure of fuel is checked in the pipeline between the filter and the fuel pump of a high pressure (TNVD).
Watch surely good ventilation of a workplace. Fuel pairs are poisonous. Do not use open fire, do not smoke. Danger of emergence of a fire! Keep in readiness the fire extinguisher.

Condition for exact check is the serviceable and charged storage battery.


1. Disconnect from the distributive highway a hose of return of fuel (2), previously having opened collars. Address to an accompanying illustration.

The fuel system is under pressure. The flowed-out fuel wipe a rag. Collars at installation replace with the new.

At some models the hose of supply of fuel is attached directly to the distributive highway. At its installation a sealing ring surely replace on new, having greased previously with vaseline. Other execution provides fastening of fuel hoses by clips. In this case removal of clips needs the special BMW 16 1 050 tool. Before installation check a sealing ring. In the presence of damages replace it.

2. Send a hose of return of fuel from the distributive highway to a measuring vessel in capacity about 2 l.
4. Disconnect the relay of the fuel pump. The relay is in the relay block at the left behind in an impellent compartment.
5. Connect at the relay basis the conductor of the plug 30 and 87b (diameter of 1.5 mm) and turn on the relay approximately on 30 with, address to the Section Check of the relay of the fuel pump.
6. Productivity of the fuel pump for 30 with should make near
1 l. (The current of the pump makes about 9.5 And).
7. If productivity of the pump less, replace the fuel filter and again check the pump. If now giving is small, replace the pump.