The Trainer #61 - DTC Diagnostics Pt1: How The ECM Thinks

Описание: It’s a New Year and a new direction for “The Trainer”! I want to thank all of the men and women who’ve shared how much they appreciate and use the material I’ve posted here over the last several years. Many of you have asked for a more detailed series, though, saying that it would be of even more help to you. You asked – we listened!

This year, I’m going to focus on producing a series of videos specifically for the professional technician. And we’re going to start with a series on diagnosing driveability concerns. This journey will take us through an understanding of the basic elements and dive into specific testing techniques you can apply right away.

In this first series, we start with exploring exactly what role the Engine Control Module (ECM) plays and the different ways it is used to control overall engine operation. I’ll show you how a Diagnostic Trouble Code (DTC) is born and how to use that knowledge to perform diagnostic tests of your own.

I’ll also show you how to test the ECM (or Powertrain Control Module if the transmission controls are contained in the same unit) power and ground circuits – one of the very first things you have to do before you can condemn one as “failed”. Once you understand that, you can apply that same test method to verifying power and ground circuits on any module on the car.

Yes, I have a lot planned for you in this first series of videos of 2017. Just one more way we here at Motor Age strive to live up to our motto of “advancing the automotive service professional”!

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