Contents: Checking the economizer ↓ Checking the pneumatic valve ↓ Microswitch check ↓ Checking the pneumatic valve control…↓
Checking the economizer
1. Check the functionality of the economizer by disconnecting the wires from the pneumatic valve with the engine running.
2. The engine should stall.
3. Check the tightness of the economizer diaphragm by supplying air under a pressure of 0.15 MPa to the economizer fitting (1.5 kgf/cm²). No pressure drop is allowed within 10 seconds.
Checking the pneumatic valve
1. Turn on the ignition and use a voltmeter or test lamp to check if there is voltage at the pneumatic valve plugs.
2. Check the functionality by disconnecting and connecting the wires to the pneumatic valve plugs. When the valve is triggered, a characteristic click should be heard.
3. Start the engine and disconnect the wires from the air valve. The engine should stall.
(The source is on the website: vazbook)
4. The valve must be airtight when supplied with air at an excess pressure of 0.085 MPa (0.85 kgf/cm²) to an unmarked nipple or when applying a vacuum of 0.085 MPa (0.85 kgf/cm²) to the fitting "1". Plug the fitting "2" when checking for leaks.
5. When applying a vacuum of 0.085 MPa (0.85 kgf/cm²) in the fitting "1" the valve should open when a 12 V electric current is applied and close when the voltage is removed.
6. Current consumption at 12 V – 0.375 A. Minimum response voltage at temperature from – 40 to 100°C, vacuum at nozzle "1" 0.085 MPa (0.85 kgf/cm²) or excess pressure on the unmarked nipple 0.085 MPa (0.85 kgf/cm²), with the "2" connector closed there should be 9 V.
Microswitch check
1. Disconnect the wires from the microswitch and, using an ohmmeter or a test lamp with a power of no more than 5 W with a battery, check the functionality of the microswitch by pressing and releasing its lever.
2. When you press the lever, the microswitch contacts should open (the control lamp should go out). When the lever is free, the microswitch contacts should be closed (the control lamp is on).
3. Check the microswitch setting as above and adjust if necessary.
Checking the pneumatic valve control unit
Checking the pneumatic valve control unit is described in subsection 9.13.