J2534 toolbox, Updating tvit driver & firmware, Tvit supported protocols – Drew Technologies TVIT User Manual
Page 13: Troubleshooting and support, If all else fails

13
Troubleshooting and Support
The TVIT gets power from your computer’s USB port. LEDs inside the OBDII shell indicate
the status of the TVIT.
Flashing green LED,
typically means that Windows has found the device and the drivers
are installed correctly. If the green light is flashing, but you cannot connect to TVIT,
contact technical support.
Continous red LED,
usually means that the drivers have not been installed, or have not
been installed correctly. Try reinstalling the drivers.
No LED lights when connected to a PC,
may indicate a failure of the TVIT device. Try
connecting your TVIT to another computer. If no LEDs light up on TVIT during this
second test, then contact technical support.
If these issues have been addressed and verified, and you are still having trouble, email
If all else fails...
Drew Tech is available Monday through Friday during eastern-time business hours, to
answer technical support questions. Please email
if you need
assistance.
If technical support finds it necessary to return the TVIT for repair, you will be asked for
your contact information and provided with a Return Merchandise Authorization number
(RMA#) that Drew Technologies will use to track the unit through the repair department
back to you. Please write this number on the outside of your shipping box so it can be
routed to the correct department. If the necessary repair is not covered by Drew
Technologies' warranty, you will be contacted for payment arrangements.
If your TVIT was purchased from an OEM equipment supplier, you may want contact
your supplier first for warranty and support claims.