Has anyone on this site ever dealt with the light not flashing when entering the learn mode? If so, what was done to fix it?

 

There was one thing that I fixed a couple years ago, the module or transceiver or whatever it's called on the ignition switch was defective and constantly locking out the starter for 5 minutes. I read where that needed to be programmed if you changed it, but mine started right up without any programming. That problem has never come back since I changed it. Any chance that the TPMS or some other system might be boggled because I never had it programmed?

 

Since no one has been able to produce any documentation on how this system works it's anybody's guess. Unless someone from GM "leaks" their NSA level secret on how this works I guess we might never know...

 

This may not help the search and debate on how the system works or why OP has an issue but this is what I found.

I recently picked up a real tech2 and while playing with it landed on the tpms settings. I selected the correct load range for the tires I had installed(E) and moved on to other things. The next morning headed to work the tpms went off with low tire about quarter mile from house. Stoped and check air and it was fine. Light went off about ten miles later.

Once arriving at work I hooked up tech2 and made sure I did process right. Going home that night no issues. Next morning the same issue happened. I live in mid-TN so I knew it was hot the night before so it’s not like what happens in fall or winter.

I tried to do the relearn of sensors, which are only year old, and system would not start. Then I remembered that behind the stereo I disconnected the two plugs from the onstar serial box. I went in and plugged them back up. System now allowed me to relearn sensors.

So I thought I had the problem fixed. Next morning same issue. Did some digging and found that my 07 adventure came with load range C type tires. So I changed load range back to C even though tires are E and I have not had issue since. My guess is even though tech2 gives as option the calibration on bcm does not like that setting.

Tech2 has calibrations up to 2013 and bcm is original and probably has not been touched since it was installed.

Hopefully this helps even though it is from a shade tree non-trained person.

 

That's the most I've seen on this issue and it's great info. I don't have that kind of scanner so I can't check any of that but perhaps in the future it will help someone. I still would like to find some info on where the radio signal is received from the sensors. I too have the onstar disconnected but I don't think that's how the signal gets through or my problems would not be intermittent (I could be wrong). It would also be great if the "Check TPM" can simply be turned off. Maybe your scanner can do that.

 

Tech2 won’t let you disable tpms. I don’t know how to tune or write code but the tech2 does have ability to program bcm. I’m guessing if you knew what you were doing you could alter the calibration data before programming the bcm.

 

I too have had nothing but grief with the TPMS in my 2006 H3.
Typically it is of the Low Tire Pressure warning display and the light on the dash Illuminating solid.
I've gone through countless new sensors, none have ever solved the issue.
I just put 4 brand new perfectly good sensors in and came home to relearn them myself.
When I get the system ready to relearn, I get the honks that it is ready, but as the poster above notes the DIC light does NOT start to flash, I can go around still and get the honk for airing down my FD, FP, RP, then nothing for the RD tire. Well within the 5 minutes.
I'm thinking now that whatever module or sensor I am pairing these new TPMS sensors to is corrupt.
Where is the base TPM sensor unit located and can it be replaced?
Unsure if related but our door locks are all out of whack and mainly have to be manually locked from the inside, the key and/or fob will only unlock the driver's door. Inside the lock/unlock all button tries to work but won't lock/unlock all the doors completely.
Thanks

 

Please AVOID Digging up OLD Threads, like this 2+ year old dog. READ: Old Threads/'Necro-Bumping'

Your fobs and TPMS both have to link with the BCM. Do you have a sunroof and has the passenger floor carpet been wet? The BCM is located behind the passenger side kick plate and does not like water. You woule have to re-program a replacement BCM.