GM SPS Programming: Tech2 Tool Pass Thru Mode ECU TIS2Web TDS How to do a Calibration Update Reflash
This video is an _historical_ overview on how you used to use the GM Tech2 scan tool to perform GM SPS Programming in what is known as Pass-Thru or Legacy Pass Thru mode for calibration updates. This could have been for the ECU or any programmable module in the vehicle, such as the EBCM, TCM, or Radio that you may have wanted to reflash. In this video we showed how you used to update the calibration flashed to the radio head unit as an example of the procedure. This is the second video in a series playlist I have done on the GM Service Programming System using the GM Tech2 and the various modes of updating the vehicle modules.
*Note: The Tech2 is no longer supported by GM for module programming. In late 2021 the SPS and TIS2Web system was deprecated, and replaced with SPS2 and Techline Connect. These current software solutions from GM no longer offer support for the Tech2 tool.*
*WARNING:* Pay very close attention to the instructions around power cabling and battery readiness as a power fluctuation during an SPS programming procedure can permanently damage a controller module. GM recommends use of their EL-49642 SPS Programming Support Tool attached to the battery to avoid this. You can also jumper cable another battery to mitigate this risk. But do NOT attempt to use a battery charger for this purpose though. I review an alternative product here -
This video originally applied to the genuine Vetronix, HP or Bosch built Tech2 as well as high quality Chinese clones equally and for all makes under General Motors such as Chevrolet, Buick, GMC, Cadillac, Oldsmobile, Pontiac, Hummer, Saturn, Opel, Vauxhall, and Saab.. The programming was illustrated using a 2009 Chevrolet Cobalt LS and the subscription service features using a Techline PC using Tech2 legacy passthru mode to update the Radio (again, note this approach has been deprecated by GM since late 2021). You may need a USB to DB9 serial port adapter, GM recommends the Tripp Lite Keyspan USA-19HS adapter.
Originally applicable to model year 2008 thru 2013, which is when the Tech2 ended and was fully replaced by the GM Multiple Diagnostic Interface tool, or MDI and MDI 2 and TIS 2 Web subscriptions. This method is *still* available with TIS2000 and SPS for GM vehicles older than 2008 though, as an alternative to using Techline Connect and SPS2.
*Buy a Tech2*
*Buy a Tech2 USB to DB9 Serial Port adapter*
And if you need a USB adapter, the GM recommended Tripp Lite Keyspan USA-19HS: or
_And if I've saved you some $$ here, consider some coins for the coffee tip-jar!_
_Disclaimer: DrShock, the alias for the human content creator for this YouTube channel, is not responsible for any damages, injuries, losses, or liabilities associated with any repairs, upgrades, or maintenance performed on yours, or any other, vehicle whatsoever. No warranty, express or implied, is made as to the accuracy or completeness of any information provided within this channel. Viewing and using the “as-is" information of this channel is totally at your own risk. Always wear personal protection equipment and follow appropriate vehicle manufacturer service manual guidelines with original manufacturer parts only when performing any repairs, upgrades, or maintenance upon any vehicle._
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