DIY: Disable TPMS and Enable FTM without sensors

[san40k]

Originally Posted by derbo

It should say FTM (flat tire monitor if that is enabled instead of TPMS).

In fact it doesn't say either TPMS or FTM on reset screen. I should be able to test soon.

[derbo]

Originally Posted by san40k

In fact it doesn't say either TPMS or FTM on reset screen. I should be able to test soon.

My apologies, I responded forgetting your car did not have idrive.

Good luck! Should work.

[spammysammich]

I forgot to have my idrive coded to make ftm available in the menu but holding the the tire monitor reset button until it chimes forces the reset as it should.

[san40k]

Originally Posted by derbo

It should say FTM (flat tire monitor if that is enabled instead of TPMS).

So tpms to ftm worked! But it took a while, 10-15 min of driving up to ~50mph (not highway) to trigger.

> BMW Assist is related to $639 VO if you want a hint

I was looking to do this first (now that TCU is out and MULF2 is likely too): https://www.e90post.com/forums/showt...5#post17156035


I have also learned that costco closes (literally removes hoses) their nitrogen tire pump stations with tire shop/store, not with costco gas. Had to drive back on deflated 22 psi tire

[jdmwol2ks]

I was trying to do this on my M3 tonight, however hit a snag. I was able to FAwrite the CAS, but not the other ECUs. I looked at the processes and was surprised FAwrite did not apply to Kombi, CIC, or DSC (I'm assuming this is M3DSC?). Any pointers on how to get this to work?

I wonder if this has something to do with the NCSexpert profile i'm using. Any help would be great, thanks!

[derbo]

Originally Posted by jdmwol2ks

I was trying to do this on my M3 tonight, however hit a snag. I was able to FAwrite the CAS, but not the other ECUs. I looked at the processes and was surprised FAwrite did not apply to Kombi, CIC, or DSC (I'm assuming this is M3DSC?). Any pointers on how to get this to work?

I wonder if this has something to do with the NCSexpert profile i'm using. Any help would be great, thanks!

You only need to FAwrite to FRM and CAS. After that, recode all the other listed modules to defaults with a blank .MAN file. This will wipe any custom coding you have already done.

[jdmwol2ks]

Originally Posted by derbo

You only need to FAwrite to FRM and CAS. After that, recode all the other listed modules to defaults with a blank .MAN file. This will wipe any custom coding you have already done.

Got it so I can only FAwrite my new VO for FRM and CAS. I’ll have to use NCS Dummy for the modules right?

I’ll need to read up on how to get a default blank .MAN. I’m curious if I can just read the default man file and make changes to that then use sg_codieren to install the modified man files right?

Update, was able to figure this out. Got the TPMS coded off and FTM on. Thanks!

[san40k]

I switched to new "track" square wheel and tire setup and went from stock 829F/832R rotations per mile to square 822 rotations per mile.

I think this is why FTM stopped working, have permanent low tire pressure warning and reset does not work any more no matter how much I drive after reset.

Any idea if square or slightly different diameter matters for FTM, any way to adjust or "hard" reset it ?

Edit: I was able to remove tpms warning (and I assume re-enable FTM) by performing reset in DSC module via INPA

[MechEngineer408]

Getting this error when trying to read M3DSC in NCSExpert
Had no issues with CIC or KOMBI. Any ideas on what's happening?

[MechEngineer408]

Tried it again and it worked. Looks like it was a problem with the cable.