User's Manual
G-scan2 User Manual 
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from the diagnostic adapter 
1. Extend the G-scan2 main cable to the vehicle side diagnostic socket. Attach the paring OBD 
non-standard connector if necessary.   
2. Turn the ignition key to ACC or ON position, and power is supplied to G-scan2. 
The power is supplied through the diagnostic socket even when the IG key is turned OFF.   
However, please note that the IG key must be turned ON for diagnostic communication. 
3. By the industrial standard, all OBD-2 / EOMB compliant vehicles are designed to supply power 
through the diagnostic adapter.   
4. The vehicle side DLC socket is recommended to be placed within 1 meter from the driver’s 
seat. It is generally found under the dashboard. However, be reminded that there are 
exceptions. 
from the cigarette lighter socket 
1.  Connect the cigarette lighter power cable to G-scan2’s DC input jack. 
2.  Extend the cable and insert the connector to the vehicle side cigarette lighter socket 
3.  Turn the ignition key to ACC or ON position, and power is supplied to G-scan. 
In case of drawing power from the cigarette lighter socket, the power is lost when cranking 
the engine causing G-scan2 to turn off if the internal battery is discharged or not installed.   
It is recommended to use the other power source if rechargeable battery is not charged or 
the battery pack is not installed to G-scan2 
from the vehicle battery 
1.  Connect the cigarette lighter power cable to G-scan2’s DC input jack. 
2.  Attach the battery cable with the alligator clips to the end of the cigarette lighter power cable. 
3.  Beware of the battery polarity, and extend the red clip to the (+) terminal of the vehicle 
battery and the black one to the (-) terminal. 
4.  Turn the ignition key to ACC or ON position, and power is supplied to G-scan2.   
 Caution 
Never connect the battery cable clips to the reversed polarity terminals. 
It may cause serious damage to G-scan2. 










