SIMULATOR MAINTENANCE TOOL FOR A GASEOUS FUEL SYSTEM OF AN INTERNAL COMBUSTION ENGINE AND METHOD OF USING SAME

摘要

A method and apparatus for servicing a gaseous fuel system for an internal combustion engine comprises turning the engine off, disconnecting a sensor from a wiring harness for an engine, connecting a simulator maintenance tool to the wiring harness instead of the sensor, turning the engine on, and sending a simulated signal from the simulator maintenance tool to an engine electronic control unit. The simulated signal indicates a normal operating condition that allows the engine to be run. The method comprises diagnosing the sensors to determine if they need replacement and depleting the gaseous fuel from the gaseous fuel system without venting to atmosphere.