Solenoid Tank Valves
SOLENOID TANK VALVES (CNG)The tank valve solenoid receives VPWR from the Inertia Fuel Shutoff (IFS) switch. If the IFS is tripped for any reason (i.e. accident), or if the key is on and there is no tach signal received, the tank valve will be closed.
In the event that the ALT fuel system auto switches to base gasoline mode, the tank valves will close. This is triggered when the FRPREAB drops to 45 psia. Only one solenoid tank valve is opened when selecting either ALT position of the three-position ALT/GAS switch when the ignition key is in the ON or crank position. (P131 with dual LPG tank configuration).