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MOSKVICH-412

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Check operation of system components

Check operation of solenoid valve. To check on the mode the minimum speed (850 1 \ min) to remove the no-load output solenoid valve plug, connected to the black wire (vehicle weight). When the engine stops for 1-2 seconds. If the engine fails stops, check the tightness of the original gate EPHH carburetor. To do this, remove the connecting tube with a nozzle at the same EPHH mode of operation. If after that the engine does not stop, stop EPHH item is defective carburetor. If in the latter case, the engine stops, the solenoid valve is defective. Its failure could be either in the gate leakage (uncoupling the central and inclined nozzles), or breakage of the valve coil. After checking the shot, set the plug in place. Checking the operation of the control unit. To check on the mode of lowest frequency of idling, remove the O DIP socket connected to the purple and white wire. Smoothly opening the throttle, increase the speed to 1500 1 \ min (At least) and fix the situation. This should be the so-called self-oscillatory mode of the engine, accompanied by pulsation frequency of rotation. The appearance of oscillations due to the fact that with increasing speed up to 1500 1 \ min electrical connection is broken conclusions 1 and 2 blocks ynpavleniya that turns off the fuel Suppress. Since the speed is reduced, after its reduction below the 1245 1 \ min communication is restored, the fuel supply is resumed and the speed increases. This process is repeated cyclically with a period of about 1-2. If you call oscillatory process fails, a solenoid valve and shut-off element EPHH no defects, the unit is defective ynpavleniya. After checking the shot, set the plug in place. Checking the operation of the microswitch. To check on the mode of minimum speed of idling, remove the O microswitch connector connected to the purple or white wire. Vacant connect the output switch to one of the conclusions control lamp voltage of 12 V, the second conclusion - with the mass of the vehicle. In this mode, the lamp should not light up. Watching the test lamp, gradually increase the frequency of rotation of the crankshaft shaft by opening the throttle. The warning lamp should light up until the emergence of self-oscillatory mode of the engine. If the lamp is lit on the mode has a minimum speed-load stroke (adjustment of the early activation of the microswitch), or lights after the beginning of the oscillations (the setting for later activation DIP) indicate the position of the microswitch. To do this, loosen the two screws holding the microswitch and picking up his new position, tighten screws. If the lamp does not light up at any throttle position, microswitch is faulty (broken xcontacts or is sticky tappet DIP). After checking the shot, set the plug in place. Remark. Early activation of the microswitch reduces the quality of EPHH up to a complete loss of efficiency (when the xcontacts are closed when the microswitch completely released the throttle pedal). Later activation of the microswitch leads to jerk the car when driving with low speed. It is therefore advisable to seek adjustment of not allowing the phenomenon of self-oscillations.
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