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Chapter 4
Diagnostics Operations
By establishing a d ata link to the electronic control systems of the vehicle being
serviced directly, the Diagnostics application allows you to retrieve diagnostic
information, view live data parameters, and perform active tests. The Diagnostics
application can access the electronic control module (ECM) for various vehicle control
systems, such as engine, transmission, antilock brake system (ABS), airbag system
(SRS) and more.
4.1 Establishing Vehicle Communication
The Diagnostics operations require connecting the MaxiSys MS906 diagnostic
platform to the test vehicle using the main cable.
4.1.1 Vehicle Connection
The method used to connect the display tablet to a vehicle’s DLC depends on
the vehicle’s configuration as follows:
A vehicle equipped with an On-board Diagnostics Two (OBD II)
management system supplies both communication and 12-volt power
through a standardized J-1962 DLC.
A vehicle not equipped with an OBD II management system supplies
communication through a DLC connection, and in some cases supplies
12-volt power through the cigarette lighter receptacle or a connection to
the vehicle battery.
OBD II Vehicle Connection
This type of connection only requires the main cable without any additional
adapter.
To connect to an OBD II vehicle
1. Connect the main cable’s female adapter to the Vehicle Data
Connector on the display tablet, and tighten the captive screws.
2. Connect the cable’s 16-pin male adapter to the vehicle’s DLC, which
is generally located under the vehicle dash.
NOTE:
The vehicle’s DLC is not always located under the dash; refer to
the user manual of the test vehicle for additional connection information.
