Place a clean towel around the solenoid valve to remove any remaining gasoline. Then loosen the screws and remove the solenoid valve.
CAREFULLY! Before checking, all traces of gasoline should be wiped off. Before removing the solenoid valve for testing, it must be grounded to prevent sparking or flashing flames during ignition on.
Ground the valve in a location as far away from the carburetor as possible.
Turn on the ignition (ON).
If the solenoid valve works, see point A). If not - item B).
A) Install the valve back.
Start the engine and let it warm up to operating temperature until the cooling fan turns on.
Block the rear wheels and apply the parking brake. Jack up the front of the vehicle and support it securely with stands.
Shift the transmission into second gear and accelerate the engine.
Quickly release the accelerator pedal and measure the voltage between terminal 28 (Green/Red (+)) And 32 (black (-)) control unit. It should be measured during braking at a speed of over 20 km / h.
If voltage is present, refer to the control module input diagnostics section. If not, then the solenoid valve is OK.
B) Switch off the ignition.
Disconnect the 2-pin connector near the solenoid valve.
Turn on the ignition.
Measure voltage between Green/Red (+) conductor and ground conductor in the engine wiring harness.
If battery voltage is present, the solenoid valve should be replaced.
If not, check the Green/Red wire between the valve and terminal 28 of the control unit. If the wire is normal, then you should refer to the diagnostics section of the inputs of the control modules.