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Section 3
Data Cable / Connections
3.1 About Ethernet Equipped Vehicles
and Data Cables
Automotive Ethernet can be thought of, as the physical networking architecture
used to allow multiple vehicle controllers and components to communicate.
Ethernet can transport data 100 times faster than CAN and is better suited for the
needs of modern safety systems. Just as CAN Bus communications are monitored
via the OBD-II diagnostic link connector, Ethernet Bus communications can be
monitored in the same way.
Ethernet equipped vehicles use the standard 16 pin OBD-II diagnostic link
connector for diagnostic tool connection, however the diagnostic tool data cable
must be designed to support Ethernet communication.
This diagnostic tool has the ability to communicate with Ethernet equipped vehicles.
In order to communicate via Ethernet, the data cable supplied with this tool (marked
“DA-4E”) must be used. Substituting a different data cable may result in no or an
erroneous communication condition.
3.2 Data Cable Connection (OBD-II/EOBD
Vehicles)
IMPORTANT
Only use the supplied data cable, and/or original equipment accessory
cables with your diagnostic tool. Total data cable length must not exceed
114.17 inches (2.9 meters).
NOTE
The diagnostic tool will automatically turn on when the Data Cable is
connected to a vehicle that has 12VDC at the data link connector (DLC). An
LED indicator on the DLC end of the data cable illuminates when power is
being supplied. If the LED fails to illuminate, check the data cable connection
and then the DLC power circuit.
1.
For OBD-II/EOBD compliant vehicles, connect the DA-4E data cable (26 pin
end) to the diagnostic tool (
). Connect the cable with the arrow
facing up (display side).
Figure 3-1
Arrow highlighted for illustration purposes only.