You are hesitant, and for GOOD reason!! What if you buy a replacement PCM and the problem is still there? Maybe you have been faced with this dilemma before and the experience still haunts you to this day. "Replace the PCM (Powertrain Control Module) and recheck." You look at the words in total disbelief and just can't bring yourself to this end result. Great!! Following the flow chart and going from "branch to branch" (sometimes referred to as a trouble tree chart), you come to the end of the diagnosis and staring you in the face are the words you dread to see. Well, you know the problem area, now what? You turn to your repair information and there is a diagnostic flow chart for the problem. DO THEY ALWAYS WORK? Technical article by: Do they always work?ĭIAGNOSTIC FLOW CHARTS.
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