Checking on the engine
1. Check the operation of the valve.
a) Initial conditions:
- the engine is warmed up to normal operating temperature,
- the idle speed is adjusted correctly,
- the gear shift lever or automatic transmission selector is in neutral position.
b) Use a jumper to short-circuit the terminals "TEG" and "E1" of the diagnostic connector.
c) Start the engine and make sure that after the speed has been maintained at 900-1500 rpm for 5 seconds, it has dropped back to the rated idle speed. Otherwise, check the accelerator drive cable, the idle speed control valve, the wiring, and the electronic control unit for any slack.
d) Remove the jumper from the diagnostic connector.
d) Check the idle speed.
2. Check the resistance of the valve winding.
a) Disconnect the valve connector.
b) Using an ohmmeter, measure the resistance between the "+B" terminal and the "ISC1" and "ISC2" terminals of the connector.
- Nominal resistance value (at 20°C): — 19 - 23 Ohm
If the resistance value is outside the specified range, replace the valve.
c) Connect the valve connector
3. Checking the valve operation.
a) Connect the connecting wire from the positive (+) terminal of the battery to the "+B" terminal and the (-) connecting wire to the "ISC1" terminal of the valve connector and make sure that the valve actuator is closed.
b) Connect the connecting wire from the positive (+) terminal of the battery to the "+B" terminal, and the (-) connecting wire to the "ISC2" terminal of the valve connector and make sure that the valve actuator is open.
If the valve operation is different from the description, first flush the valve and repeat the testing procedures. If necessary, disassemble the valve and eliminate the cause of jamming, otherwise replace the valve.