BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Cooling systems, heating
- Power supply system and release
   + Power supply system
   - System of injection of the petrol engine
      Memory of malfunctions
      Security measures and rules of respect for purity during the work with system of injection
      Work of system of injection
      Check of systems of ignition and injection
      Adjustment of the drive of gas
      Removal and installation of a branch pipe of a butterfly valve
      Removal, check and installation of the valve of adjustment of idling
      Check, removal and installation of the sensor of temperature
      Check of injectors
      Removal and installation of injectors
   + 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


System of injection of the petrol engine

General information

Block diagram of system of injection of Motronic (DME)

1 — an adsorber
2 — the locking gate
3 — the valve of ventilation of the fuel tank
4 — the fuel pressure regulator
5 — an injector
6 — pressure control point adjustment
7 — the ignition coil
8 — the situation sensor
9, 10 — positions are absent
11 — the measuring instrument of mass of air
12 — the control unit
13 — the sensor of provision of a butterfly valve

14 — the idling regulator
15 — the air temperature sensor
16 — the valve of recirculation of the fulfilled gases
17 — the fuel filter
18 — the detonation sensor
19 — the speed sensor
20 — the engine temperature sensor
21 — the oxygen sensor
22 — diagnostics plug
23 — diagnostics lamp
24 — the sensor of differential pressure
25 — the fuel pump

Petrol BMW engines have Bosch-Motronic control system. It is the combined electronic system of ignition and injection designated as Digitale Motor-Elektronic (DME). Management of systems of ignition and injection is carried out by the general control unit. In the present Chapter the system of injection is considered.

The DME system steadily works for a long time and does not demand service. Need under repair arises extremely seldom.