Examination
1. Apply the parking brake and place the shift lever in neutral. Connect a tachometer in accordance with the manufacturer's instructions. Connect the wire from the tachometer to the IG terminal of the electrical connector (see fig. Connecting the tachometer to the IG terminal of the data link connector located in the lower part of the engine compartment). Start the engine and warm it up to normal operating temperature. Turn on the air conditioning system.
2. Using an additional wire, close the contacts TE1 and E1 of the electrical connector (see subsection 6.13.6, point 2).
3. Check that the engine speed has increased to 1000-2000 rpm for about 3 seconds, then the idle speed is established. After 15 seconds, check the idle speed again, which should be 100 rpm more than normal idle speed. If the idle speed has increased by more than 100 rpm, turn the adjusting screw to set the appropriate speed. If the idle speed has not changed or even decreased, check the resistance of the idle air conditioning valve.
4. Remove the extra ground wire.
5. Disconnect the electrical connector from the A/C idle speed valve.
6. Measure the resistance of the idle valve, which should be 30-34 ohms.
7. Using additional wires, apply battery voltage to the idle valve contacts and purge the valve by supplying compressed air to the upper channel. When the battery is connected, air must pass; when the battery is disconnected, air must not pass through the valve.
Replacement
1. Unscrew the fastening screws and remove the valve together with the gasket.
2. Installation is made in sequence, return to removal.