Attention! Engine idle speed is set
by the manufacturer and under normal operating conditions, they do not need to be adjusted. However, if the throttle chamber has been changed, or there are suspicions that the idle speed adjustment has been violated (for example, the idle screw was turned out of the throttle chamber), then the car should be handed over to a car service.
Examination
1. Check the operation of the regulator. To do this, on the diagnostic connector, connect the terminals TE1 and E1 with a jumper. Bring the speed to 1300 rpm, after 10 seconds, release the damper 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 - now the rpm should 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. With terminals B and RSO energized, the regulator valve should open.
7. If resistances differ from normal replace a regulator.
8. Check the operation of the valve according to the diagram, observing the polarity of the connection.
9. When these terminals are energized, the regulator valve should close.
Replacement
1. Loosen the screws (indicated by arrows) and remove the regulator and gasket. Remove damper housing if necessary.
2. If the regulator is changed, then remove and rearrange the thermal vacuum valve on the new regulator (if provided).
Installation
Installation is carried out in the reverse order.