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14:14. A control system of speed (темпостат) - the general information and failure diagnostics

Tempostat allows to support the cruiser speed of the movement of the car at the level chosen by the driver.

At the movement of the car under a bias or uphill the high-speed mode can change.


The control system of a tempostat allows to carry out the movement in the marching mode (with a cruiser speed), to move a setup, to carry out acceleration, to make return to the chosen earlier high-speed mode, and also to carry out step adjustment of the chosen speed.

Switches of management, dumping sensors switches, assembly of control of speed, the information sensor, the module of management, the actuation mechanism and connecting draft are among the main components of a tempostat.

Depending on a year of release of model темпостат can have electronic or vacuum control. The design of system provides a possibility of initiation of a tempostat only at the movement with a speed not lower than 40 km/h (25 miles/h).

Switches of management are usually mounted on the lever of a steering column, or on the car dashboard. Sensors switches of dumping of a tempostat fasten on arms of pedals of a foot brake, coupling and gas and at their operation there is an immediate electric shutdown of system to return of a butterfly valve to the provision of idling.

Diagnostics of malfunctions of a tempostat

Nature of refusal
Possible reason
The system does not provide keeping of speed of the movement of the car at the chosen level Adjustment of a driving cable is broken
Draft of the drive of a butterfly valve is jammed
Losses of depression in the vacuum servo-driver or the tank take place
The vacuum or ventilating valve is faulty
The step motor is faulty
The sending device is faulty
The speed sensor is faulty
The module of management of a tempostat is faulty
From time to time there is a spontaneous shutdown of a tempostat Adjustment of one of dumping sensors switches is broken
The break takes place or short circuit in I correspond Russian cabbage soup of an electric chain
The sending device is faulty
The module of management is faulty
The car moves breakthroughs The speedometer drive cable is overwound
Draft of the drive of a butterfly valve is jammed
The speed sensor is faulty
It is faulty model of management
Tempostat does not function The corresponding safety lock fused
The break or short circuit in the corresponding electric chain takes place
One of dumping sensors switches is faulty
Losses of depression in a vacuum path take place
The switch of management of a tempostat is faulty
The step motor is faulty
The sending device is faulty
The speed sensor is faulty
It is faulty model of management