F 150 2WD Pickup V8-4.6L CNG SOHC VIN 9 (1997)
Fuel Gauge Module (CNG): Description and Operation
The Natural Gas Vehicle (NGV) module assembly
consists of:
a 60-pin module,
a bracket,
a marine cover and
four marine cover retainers.
It also houses the unique electronics required for natural gas fuel systems.
The NGV module assembly performs the following functions:
Note: No injector calculations are performed; the injector driver output is not determined by the NGV module.
Injector drivers: the NGV module accepts eight unmodified injector signals from the powertrain control module (PCM) and allows a
peak-and-sustain current to flow through the injector solenoids.
Fuel gauge driver: the NGV module uses tank temperature and fuel tank pressure inputs to calculate
