BMW 3 Series E46

since 1998 release

Repair and operation of the car



BMW 3 Series E46
+ BMW 3 cars (E46)
+ Current leaving and service
+ Engine
+ Cooling systems, heating
+ Power supply systems, injection and release
+ Engine electric equipment
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   - Dignostic of electric elements
      Diagnostics of malfunctions of 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
      Check of a stoplight
      Check of the warmed back glass
      Removal and installation of the sensor of temperature
   + Lighting and alarm system
   + Devices and equipment
+ Schemes of electric equipment





Chain breakers (thermal relays) - the general information

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







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