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20
4 Diagnostics
The Diagnostics application can access the electronic control module of multiple vehicle
control systems, including but not limited to the engine, transmission, antilock brake
system (ABS) and airbag system (SRS).
4.1 Establish Vehicle Communication and Selection
4.1.1 Establish Vehicle Communication
The Diagnostics operations require connecting the MaxiSys Ultra Diagnostic tablet to the
test vehicle through the VCMI device using the Main Cable. (Use the applicable OBD I-
type adapter if needed). To establish proper vehicle communication to the tablet, you
need to perform the following steps:
1. Connect the VCMI device to the vehicle's DLC for both communication and power
source.
2. Connect the VCMI device to the tablet via BT pairing, Wi-Fi or USB connection.
3. When the above steps are completed, check the VCMI navigation button at the
bottom bar on the screen, if a green BT, Wi-Fi or USB icon displays at the lower right
corner, the MaxiSys Ultra Diagnostic Platform is ready to start vehicle diagnosis.
4.1.1.1 Vehicle Connection
The method used to connect the VCMI device 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
VCMI device, and tighten the captive screws.
2. Connect the cable's 16-pin male adapter to the vehicle's DLC, which is generally
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