Fuel Injector Driver 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.
- houses the unique electronics required for natural gas fuel systems.
- is located on the LH inner fender well, behind the coolant recovery bottle.

The NGV module assembly performs the following functions:
- 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.

NOTE: No injector calculations are performed; the injector driver output is not determined by the NGV module.

- Fuel gauge driver: the NGV module uses tank temperature and fuel tank pressure inputs to calculate the density of the fuel; a look-up table is used to determine the output signal to the fuel gauge.