Hi, 've finished my TPMS retrofit some weeks ago but I'm looking for some help because I still couldn't make it display the tyre pressure screen on MMI. The system seems to be partially working since it can correctly get pressures and temperatures from the sensors and generates alerts when there's some tyre below pressure. Diagnostic scans with VCDS show that pressures and wheel positions recived by the TPMS module are accurate.
Problem is, instead of displaying the direct TPMS scren with the tyre diagram, MMI displays the "store tyre pressures" screens, as if I was using indirect TPMS.
Of course, I've disabled indirect TPMS as part of the coding process changing bytes 27 and 28 on ABS module changed from 3882 to 0802 (back to what it was originally coded from factory).
I though it might be related with some wrong coding for Instruments ou Information Electronics, but I did some tests some time ago with another TMPS module from a Passat (P/N: 5Q0907273) and I did get the direct TPMS tyre pressure diagram on the MMI screen. Of course it didn't work properly (the Passat module doesn't handle temperatures, only pressures). So now I've tested that again and replaced the 8V module (P/N: 8S0907273) with the Passat unit without changing any coding. And then the direct tire pressure diagram appeared. Removing the Passat unit and reinstalling the 8V module, the diagram was no longer displayed and again I had only the indirect TPMS "store tyre pressures" screen. So I'm sure my MMI is able to display the right screen. The strange thing is that it displays the right screen with the wrong module, and the wrong screen with the right module.
Any ideas?
Problem is, instead of displaying the direct TPMS scren with the tyre diagram, MMI displays the "store tyre pressures" screens, as if I was using indirect TPMS.
Of course, I've disabled indirect TPMS as part of the coding process changing bytes 27 and 28 on ABS module changed from 3882 to 0802 (back to what it was originally coded from factory).
I though it might be related with some wrong coding for Instruments ou Information Electronics, but I did some tests some time ago with another TMPS module from a Passat (P/N: 5Q0907273) and I did get the direct TPMS tyre pressure diagram on the MMI screen. Of course it didn't work properly (the Passat module doesn't handle temperatures, only pressures). So now I've tested that again and replaced the 8V module (P/N: 8S0907273) with the Passat unit without changing any coding. And then the direct tire pressure diagram appeared. Removing the Passat unit and reinstalling the 8V module, the diagram was no longer displayed and again I had only the indirect TPMS "store tyre pressures" screen. So I'm sure my MMI is able to display the right screen. The strange thing is that it displays the right screen with the wrong module, and the wrong screen with the right module.
Any ideas?
Nice to see some real effort put here.