BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car



BMW E39
+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Cooling systems, heating
- Power supply system and release
   - Power supply system
      Economy of fuel at the movement
      Rules of respect for purity during the 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 mass 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
+ Schemes of electric equipment
+ System of onboard diagnostics




Check of the relay of the fuel pump

 PERFORMANCE ORDER

1. The relay of the fuel pump (2) is at on the right in a luggage carrier behind facing, over a battery room of batteries. Address an accompanying illustration. It supplies with electric current the fuel pump. By means of the safety switch it stops fuel supply if at the included ignition engine speed impulses do not arrive. If for check of system of injection it is necessary to start the fuel pump, without starting the engine, disconnect the relay and connect a short wire of the plug 30 and 87b (Diesel: plug 87). Diameter of a wire is 1.5 mm.

For check of the relay of the fuel pump the rechargeable battery has to be charged.

2. Check a safety lock of system of injection. The arrangement of safety locks is shown on a cover of the block of safety locks.
3. Disconnect the relay of the fuel pump.

4. Connect a short wire of the plug 30 and 87b (Diesel: plug 87). Address an accompanying illustration. Do not damage at the same time sensitive contacts of the relay. If the pump works, replace the relay. If the pump does not work, check the wires going to the relay and the fuel pump. If necessary replace a wire.

5. Check the relay/the fuel pump, address Sections of the Relay and Check of the relay.








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