BMW:: 5th E28/E34 series:: Description and check of work of a control system of the speed (tempostat)

1. Cars of the BMW 5-brand of a series
2. Engine
3. Cooling system
4. Power supply system
5. System of ignition
6. Control systems of the engine and decrease in toxicity of the fulfilled gases
7. System of production of the fulfilled gases
8. Coupling
9. Manual Box of Gear Shifting (MBGS) and automatic transmission (AT)
10. Transmission line
11. Steering and suspension bracket
12. Brake system
13. Body
14. Control body sizes
15. Heater and conditioner of air
16. System of onboard electric equipment
- 16.1. General information
- 16.2. The general information on search of malfunctions in electric chains
- 16.3. Removal and installation of the rechargeable battery
- 16.4. Check of a state and replacement of wires of the battery
- 16.5. General information on safety locks
- 16.6. General information on the relay
- 16.7. General information about system of a charge and precautionary measure during the work with it
- 16.8. Check of system of a charge
- 16.9. Removal and installation of the generator
- 16:10. Replacement of the regulator of tension
- 16:11. Check and replacement of brushes of the generator
- 16:12. General information about system of start of the engine and a precautionary measure
- 16:13. Check of a starter on the car
- 16:14. Removal and installation of a starter
- 16:15. Removal and installation of the traction relay
- 16:16. Check and replacement of breakers of indexes of turn and alarm system
- 16:17. Removal and installation of switches on a steering column
- 16:18. Removal and installation of the lock of ignition
- 16:19. Removal and installation of the radio receiver
- 16:20. Removal and installation of the antenna
- 16:21. Removal and installation of components of an instrument guard
- 16:22. General information on the panel of alarm lamps of a reminder on the term of service (SI)
- 16:23. Replacement of lamps in head headlights
- 16:24. Adjustment of a beam of head headlights
- 16:25. Removal and installation of the case of a head headlight
- 16:26. Replacement of lamps
- 16:27. Removal and installation of the motor of a screen wiper of windshield / glass of a door of a back
- 16:28. Check of work and repair of a heater of back glass
- 16:29. General information on an auxiliary security system (SRS)
- 16:30. Description and check of work of a control system of the speed (tempostat)
- 16:31. Description and check of work of system of the central blocking of doors
- 16:32. Description and check of work of system of power windows
- 16:33. Diagnostics of malfunctions of a suspension bracket of back wheels
17. Routine maintenance of the car
18. Size table and adjusting data
19. Schematic electric circuits
20. Governing bodies and methods of operation
21. System of onboard diagnostics - the principle of functioning and codes of malfunctions

16:30. Description and check of work of a control system of the speed (tempostat)

The control system of speed (темпостат or a cruise control) supports car speed by means of the vacuum servomotor located in a motive compartment which a cable connects to draft of the throttle valve. The system consists of the servomotor, the switch of coupling, the switch of a pedal of a brake, control switches, the relay and vacuum hoses.

In connection with complexity of a control system of speed its repair should be provided to dealer office of service. However the house mechanic can make simple checks of conducting and vacuum connections on existence of small damages which can be easily eliminated. Treat such checks:

Survey of activated switches of a control system of speed regarding damage of wires and weakening of contacts.
Check of safety locks of system
The control system of speed uses vacuum therefore it is critical that all vacuum switches, hoses and connections worked reliably. Check hoses in a motive compartment for weakening of connections, existence of cracks or obvious leak of vacuum.