obd2cartool.com Tech-2-User-Guide

SECTION IV
POWER SUPPLIES
Power Supplies
Power up the Tech 2 using either:
• The power jack connector at the bottom of the Tech 2 unit (Figure IV-1), or
• The DLC cable power jack connector behind the area where various DLC adapters are connected
(Figure IV-1).
For non-vehicle communications, connect power source to either location.
For vehicle communications, connect the power source to the DLC cable power jack connector only.
Proper grounding may not be present if power source is connected directly to Tech 2.
When the Tech 2 is connected to the DLC of an appropriate vehicle, the vehicle battery supplies power.
When the Tech 2 is not connected to the vehicle’s DLC, the DLC cable power jack connector accepts
power from the following:
• Cigarette lighter power cable (Figure IV-1, see text on page IV-2)
• Battery power cable (Figure IV-1, see text on page IV-2)
• NAO or Universal power supply (Figure IV-1 and Figure IV-2, see text on page IV-3)
If the DLC and external power source are both connected, the power jack connection supplies current to
the Tech 2. In this instance, power from the vehicle’s DLC connector is automatically disconnected from
the Tech 2 internal power supply.
Figure IV-1
Tech 2 power connections (without direct power connection from the DLC)
2005 Tech 2 User’s Guide IV - 1