Patent ID: 6761059
Filing Date: 2004-07-13
Classification: F02D,F02M

Abstract:
A diagnostic tool for testing fuel injectors and their driver circuits in a fuel injection system of an engine in a motor vehicle, the tool comprising:a driver-connection port for connection to the driver circuits; an injector-connection port for connection to the fuel injectors; a load that simulates a load imposed by a fuel injector on a driver circuit; individual position selector switches each of which is individual to a particular fuel injector and the respective driver circuit and is selectively operable to: a) a first position that connects the simulated load through the driver-connection port to the respective driver circuit when the driver circuits have been disconnected in the vehicle from the fuel injectors and instead connected to the driver-connection port; and b) a second position that connects the respective driver circuit through the tool with the respective fuel injector when the driver circuits and the fuel injectors have been disconnected in the vehicle from each other, the driver circuits are instead connected to the driver-connection port, and the fuel injectors are instead connected to the injector-connection port.