BMW 3 series E46

Since 1998 of release

Repair and car operation



The BMW of 3 series Е46
+ Cars BMW 3 (Е46)
+ Current leaving and service
+ The engine
+ Systems of cooling, heating
+ Power supply systems, injection and release
+ Engine electric equipment
+ РКПП and трансмиссионная a line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   - Дигностика electric elements
      Diagnostics of malfunctions of an onboard electric equipment - the general information
      Safety locks - the general information
      Replacement of safety locks
      Fusible inserts - the general information
      Chain breakers (thermal relays) - the general information
      The relay - the general information
      Check of the electric motor of a screen wiper
      Stoplight check
      Check of warmed back glass
      Removal and installation of the gauge of temperature
   + Illumination and the alarm system
   + Devices and the equipment
+ Electric equipment schemes


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Chain breakers (thermal relays) - the general information

Thermal relays serve for protection of such components, as electric drives of lowering-podnimanija of glasses, door-locks and adjustment of position of head headlights. Chains some of breakers are placed in the assembly block of safety locks. Return of thermal relays to an initial condition on some models is carried out automatically, i.e. at overload occurrence in a chain the thermal relay is instantly disconnected, then, after cooling, reverts to the original state. If contour return into position does not occur, it is necessary to make its check immediately. Normal functioning of the thermal relay confirms serviceability of a contour. Some of breakers are equipped by buttons for manual compulsory return to an initial condition.