Attention! The engine idle speed is set
by the manufacturer and when operating under normal conditions, their adjustment is not required. However, if the throttle chamber has been changed, or there is a suspicion that the idle speed adjustment has been violated (for example, the idle speed screw was unscrewed from the throttle chamber), then the car should be taken to a car service center.
Examination
1. Check the operation of the regulator. To do this, connect the TE1 and E1 terminals with a jumper on the diagnostic connector. Bring the speed to 1300 rpm, after 10 seconds release the throttle and check the idle speed - the speed should drop to normal (see subsection 2.1).
2. Disconnect the vacuum hose and plug it securely. Start the engine - the speed should now be 500 rpm, and the engine may stall. If the speed is higher, then there is an air leak in the regulator.
3. Install the hose and remove the jumper.
4. Disconnect the connector from the regulator.
5. Check the resistance between the pairs of terminals B and RSC, B and RSO.
6. When terminals B and RSO are energized, the regulator valve should open.
7. If the resistance differs from normal, replace the regulator.
8. Check the valve operation according to the diagram, observing the polarity of the connection.
9. When these terminals are energized, the regulator valve should close.
Replacement
1. Unscrew the screws (indicated by arrows) and remove the regulator and gasket. If necessary, remove the valve body.
2. If the regulator is being changed, remove and reinstall the thermal vacuum valve on the new regulator (if provided).
Installation
Installation is carried out in reverse order.
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