Purpose Of This Article: Notes

NOTE: This is GENERAL information. This article is not intended to be specific to any unique situation or individual vehicle configuration. For model-specific information see appropriate articles where available.

Learning how to interpret injector drive patterns from a Lab Scope can be like learning ignition patterns all over again. This article exists to ease you into becoming a skilled injector pattern interpreter.

You will learn:

How a DVOM and noid light fall short of a lab scope.
The two types of injector driver circuits, voltage controlled & current controlled.
The two ways injector circuits can be wired, constant ground/switched power & constant power/switched ground.
The two different pattern types you can use to diagnose with, voltage & current.
All the valuable details injector patterns can reveal.