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

Memory of malfunctions

The control unit reveals malfunctions in system of injection and ignition, such as, failure of sensors, a detachment of plugs or leakage of contacts. The specified malfunctions at once are registered in memory. At the same time on the dashboard the control lamp lights up, indicating that malfunction is written down in memory. If malfunction appears only once, for example at bad contact, the control lamp dies away again, but malfunction registers in memory. Besides, the data indicating the frequency of emergence of malfunctions register. HUNDRED BMW by means of the control device attached to diagnostics plug (on the right in a motive compartment), read out malfunctions and eliminate them.

If the engine or system of injection work is faulty, it is recommended to consider first of all data from the block of memory of malfunctions. The list of malfunctions can print HUNDRED. For this purpose the reading-out electronic device joins the car.

All options of DME have emergency operation of work: if the sensor fails, the control unit continues work, using average value of controlled parameter of the corresponding sensor. At failure of the measuring instrument of mass of air the control unit for measurement of supply of fuel as basic accepts data of sensors of provision of a butterfly valve and speed of the engine. This option of management joins automatically and is not displayed on the dashboard. The movement continues, dynamic characteristics worsen a little, but is imperceptible for the driver. Malfunction is registered the control unit. Therefore it is recommended periodically, for example at control of composition of the fulfilled gases, to read out contents of memory of malfunctions even if externally defect is not shown.

At shutdown of the rechargeable battery or as a result of undocking of shtekerny connection at the control unit all malfunctions in memory are erased.