How to Use The Snap-On MODIS

THE MODIS™ SCANNER

Edition 2.0 Modis BOOK



Preface

With the ever increasing electronic content in today's vehicles, the

scan tool has become the tool of choice to look into the ECM or module

functions. The scanner is the only window into what the different

modules are doing. One thing's to use an oscilloscope or GMM, but to

know what the computer is actually interpreting, your only choice is

this piece of equipment.

This book is different than other book on the MODIS. This book

actually teaches you how to use the equipment and interpret the PID

datastream. This book also borrows from some of our other

publications, but geared towards the Modis. We also expose the use of

other diagnostic equipment and how to use them together. In today's

automotive repair shop the technician has to be able to use the

equipment and draw relational characteristics between the signal. It is

from these relations that the tech arrives to the true repair. It's not

just using the Modis. It's using the Modis and see if the scope and

multi-meter readings also support the repair conclusion.

Snap-On has over the years developed into a leader in diagnostic

equipment. With that in mind, lets learn to use the MODIS to its fullest

and become a profitable, top technician. Remember, learning to