Astro Van 2WD V6-4.3L VIN X (2002)
Engine Control Module: Description and Operation
Basic Knowledge Required
Without a basic knowledge of electricity, it will be difficult to use the diagnostic procedures contained. You should understand the basic theory of
electricity and know the meaning of voltage (volts), current (amps) and resistance (ohms). You should understand what happens in a circuit with an open
or a shorted wire. You should be able to read and understand a wiring diagram.
