Does a remap leave a time/date stamp?

TD1

There is no date related info on a VCDS scan relating to s/w updates (only on fault codes) so I'm unsure if there is a DTS indicating when software was installed, however the Audi diagnostic kit is more sophisticated, so that may show date info.

Regarding TD1, that's not a flag generated by carrying out an engine scan, that's an administrative flag set by Audi on the cars electronic record card, which is presented to any dealer who services the car.

The reason Audi can detect if there has been an unauthorised software flash on the ECU, is that there is a "flash counter" within the ECU. So if the counter says the ECU has been flashed 5 times, but the cars VAG electronic record says it's been dealer flashed/updated twice, then they know someone outside of the authorised dealer network has been playing with the software. This is the primary reason that "flashing back" or returning to stock ECU software does not guarantee you will not be caught and flagged TD1.

You could try to find an independent garage, with dealer level diagnostics, to take a look-see.

Reset the flash count

On my latest VCDS autoscan there was a change in the ECU data following my remap, however I only noticed it because I could see the before and after scans. So without further information about what the data should be, indeed you won't be able to determine if the ECU has been flashed just from the autoscan. However of course if you have VCDS then you can check the flash status in the Advanced ID screen.

Audi spotted my Revo stage 1+ from the ECU when it went in for service last year.
Told me it would invalidate the approved warranty on the car.

Luckily enough I'd bought it from them 7 months previous in that state of tune so they (eventually) agreed and removed and re coded ECU and swapped the pulley out.
Gutted to lose the power but thankful to have the warranty cover in place (for the DSG) more than the additional power.

bobby singh said:

Reset the flash count

Click to expand...

Is this possible? And if so, does this not solve the concerns of getting a car remapped and potentially losing your warranty?