ABOUT THIS MANUAL No part of this manual may be reproduced, stored in a retrieval system, or be transmitted in any form without the prior written permission of Mack Trucks, Inc. The “Premium Tech Tool” (PTT) is the preferred tool for performing diagnostic work. Contact your local dealer for more information. Please take the time to familiarize yourself with the contents of this manual before attempting to work on a vehicle. Make sure you completely understand the instructions for performing a test before beginning the test procedure. This manual is intended to provide basic information about the V-MAC IV (Vehicle Management and Control) System.
Although every effort has been made to ensure that all the information is as accurate as possible, due to our product upgrades, some information may not be applicable to all chassis. Not all chassis are equally equipped, and care should be taken to determine exactly what equipment is installed on the vehicle. The information in this manual show multiple occurrences of the Instrument Cluster Module (ICM), Engine Management System (EMS) Module or the Vehicle Electronic Control Unit (VECU). The information is formatted in this way for clarity and ease of use, and do not imply that more than one ICM, EMS or VECU is installed on any vehicle.
Please pay particular attention to the Notes, Cautions and Warnings which are placed throughout the manual. These are intended to call attention to specific procedures which must be followed. Page 3 INTRODUCTION