Quote:
Originally Posted by Ebush
You download the software on the laptop and then plug the laptop into the ECU while the battery is connected. The ECU needs power from the car in order to be able to hook the laptop up to it.
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That's what it looked like on Haltech's videos, but it also looked like they downloaded NSP, and then they connected the laptop to the ECU, and then they connected to the internet through NSP to update the firmware for the ECU. I don't think the firmware is downloaded with the NSP software and stored on the computer in such a way that it can update the firmware without the internet, but I could be wrong; that is just what it looked like from the video.