VXDIAG Reprogram GM Volt 2012 HPCM2 with Techline Connect on Win10

Another GM Volt HPCM2 reprogramming review using VXDIAG VCX NANO GM scanner and Techlinne Connect subscription.

“I have a 2012 Volt that keeps throwing a bogus code about low coolant in the high voltage battery coolant reservoir. Not often, maybe once a year or once every 6 months. I have no idea why it is doing this. I tried the plug that basically hardwires the right resister to the leads. I checked and even cleaned up and resoldered the leads from the sensor where they go into the wiring harness and still, sometimes it just trips. When it does, the HPCM2 needs to be reprogrammed. I finally got tired of taking it to the dealership and decided to try the VXDIAG VCX Nano. I’d post the latest on how I successfully pulled it off.

1: Use a windows 10 computer. Windows 11 may work, but I didn’t try.
2: Order a VCX Nano. It went on sale for $105.
3: Download the latest VX Manager software installer from the vxdiagshop.com site where you ordered your VCX Nano. Surprisingly, that appears to be clean.
4: When installing, check the box for J2354 Passthru driver, NOT any of the manufacturer specific ones and NOT the GM ones.
5: Go to acdelcotds.com, create an account, and buy the $45, 1-VIN software subscription for 2 years.
6: After buying that, go back to the subscriptions page. You will see an ‘Add VIN‘ link, but only if you’re logged in and you have to log in again every single time you go there. They must have some of the worst web application developers out there. Click it. It will take you to a page where you can download the TLC (Techline Connect) installer.) Fear not. On the pricing page, a license for Techline Connect is over $4,300 per year. Don’t worry, you won’t need a license, but you will need the software.
7: Run the installer. When it completes, it will run Techline Connect. Close it. The username and password you created on acdelcotds.com will not work in the username and password fields to login to Techline Connect, so don’t bother trying.
8: Go back to acdelcotds.com, Login, and again click the ‘Add VIN’ link again. On the page that comes where you downloaded Techline Connect, leave the ‘Run as admin’ checkbox unchecked and click ‘Launch Techline Connect’. When it runs, it will see there are a boatload of updates that it does not have and it will go through them all. It is going to install a lot of software.
9: When it’s all done, it will close. Again go back to acdelcotds.com and repeat above process for launching Techline Connect. This time, you should make it all the way into the application. Click on the SPS option on the icons in the list of icons on the menu at the left of the window.
10: VXDIAG should show up as a device option. After this, the VIN should be automatically detected and then you can keep clicking Next and make it through the process. When it gets to the modules, it’s a much longer list than most vehicles. Find the Hybrid Powertrain Control Module 2 option and click it. Then, just keep clicking next and agreeing to everything until it’s done.

After programming is complete, you may need to turn the car off and turn it back on again if the check engine light is lit.

Start to to finish, you’re looking at around 1 to 2 hours depending on how fast you are.

For ~$147 I now have the capability to clear codes whether it’s a real problem or not.”

Updated:

It works fine on Windows 11 as well.

Another review:

“I ordered VCX Nano from vxdiagshop.com and followed the above instructions on my Windows 11 Computer with the virus protection off. I followed your steps exactly and in 2-3 hours I was able to clear the DTC’s, and I plugged in and got a green charging light again. I have never been so happy to see my Volt charging. And it worked using Windows 11 without a hitch.”