User's Manual

1.Using This Manual
This manual contains device usage instructions.
Some illustrations shown in this manual may contain modules and optional equipment that are not
included in your system.
1.1Conventions
The following conventions are used.
1.1.1Bold Text
Bold text is used to highlight selectable items such as buttons and menu options.
• Tap NEXT
1.1.2Notes and Important Messages
A NOTE provides helpful information such as additional explanations, tips, and comments.
The IMPORTANT indicates a situation that if not avoided may result in damage to the tablet or vehicle.
1.1.3Illustrations
Illustrations used in this manual are samples, and the actual testing screen may vary for each vehicle
being tested. Observe the menu titles and on-screen instructions to make correct option selection.
1.1.4Procedures
An arrow icon indicates a procedure.
Example:
 To use the special functions:
1. Tap the Special button. The customers can use the functions they need to diagnose the vehicles.
2. Select the vehicle brand and type.
3. Tap the NEXT to select automatic scan or manual scan.
2.General Introduction
The M400 is a multi-platform diagnostic solution comprised of a powerful 4.0 inch TFT-LCD
touchscreen Android-based tablet, a NEXZBOX communication and diagnostic measurement unit and
an on-tool and cloud-based repair instructions and expert advice. As an intelligent diagnostic and
information system, M400 not only displays the relevant repairs gathered from experienced industry
experts, but provides step-by-step guidance to ensure the repair is done correctly and efficiently.
There are two main components to the M400 system: