E39 series BMW 5

since 1996-2001 of release

Repair and car operation

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   Diagnostics of malfunctions of onboard electric equipment - the general information
   Safety locks
   Fusible inserts
   Chain breakers (thermal relays)
   Relay check
   Check of filament lamps
   Check of electric motors
   Check of electric switches
   Check of switches of lamps and electric motors
   Check of sensors
   Check of the electric motor of a screen wiper
   Stoplight check
   Check of a heater of back glass
   Removal and switch installation
   Removal and installation of the sensor of temperature
   Removal, installation and check of a sound signal
   Initialization of remote control by the uniform lock
   Adjustment of range of light of headlights
   Removal and installation of the electric motor of adjustment of range of light
   Replacement of safety locks
   Arrangement of safety locks
   Lighting devices
   Replacement of filament lamps
   Removal and headlight installation
   Adjustment of headlights
   Removal and installation of a back lamp
   Removal and installation of the block of the dashboard
   Replacement of lamps of the block of the dashboard
   Removal and installation of the switch of signals of a turn/screen wiper
   Removal and radio receiver installation
   Screen wiper
   Replacement of brushes of a screen wiper
   Removal, installation and adjustment snuffled a stekloomyvatel
   Removal and installation of a drive of a screen wiper/cover
   Removal and installation of the electric motor of a screen wiper
   Check and replacement of the pump of a stekloomyvatel
   Work with electric circuits
+ electric equipment Schemes
+ System of onboard diagnostics

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Check of sensors

Sensors treat, in particular: the sensor of the relay of pressure of oil, the sensor of a reserve of brake and cooling liquid.


1. Attach a control lamp or an ohmmeter to switch plugs. For this purpose disconnect cables from the switch.

The switches screwed in the block of cylinders, as a rule, have no weight cable as connection with weight is carried out via the case.

2. At the closed switch the device should give evidences. Best of all for this purpose to use an ohmmeter. At the closed switch the ohmmeter should show a zero Ohm at opened infinity Ohm.
3. Operability of sensors of a reserve of cooling liquid and brake liquid is most easier for checking as follows. At the included ignition disconnect from the switch a wire and put it to a reliable point of weight, for example to the block of cylinders. If the corresponding signaling device on dashboards, malfunction in the switch lights up.
4. The special case represents the sensor of the relay of pressure of oil. At the idle engine contact is closed (a signaling device burns). The switch works only at a certain pressure of oil.