THE MODIS™ SCANNEREdition 2.0 Modis BOOK PrefaceWith the ever increasing electronic content in today's vehicles, thescan tool has become the tool of choice to look into the ECM or modulefunctions. The scanner is the only window into what the differentmodules are doing. One thing's to use an oscilloscope or GMM, but toknow what the computer is actually interpreting, your only choice isthis piece of equipment.This book is different than other book on the MODIS. This bookactually teaches you how to use the equipment and interpret the PIDdatastream. This book also borrows from some of our otherpublications, but geared towards the Modis. We also expose the use ofother diagnostic equipment and how to use them together. In today'sautomotive repair shop the technician has to be able to use theequipment and draw relational characteristics between the signal. It isfrom these relations that the tech arrives to the true repair. It's notjust using the Modis. It's using the Modis and see if the scope andmulti-meter readings also support the repair conclusion.Snap-On has over the years developed into a leader in diagnosticequipment. With that in mind, lets learn to use the MODIS to its fullestand become a profitable, top technician. Remember, learning to

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