Diagnostic Tools: Notes
WARNING: This page is about a different car, the 1989 Cadillac Fleetwood and 1989 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
The DFI system does not require special tools for diagnosis. An unpowered test light, ohmmeter, digital voltmeter with 10-megohm impedance (minimum), vacuum pump, vacuum gauge and 6 jumper wires 6" long, are the only tools necessary for diagnosis.