NTMD8R

OK, we autocross our 2008 Z06.
Accordingly we change wheels/tires at the track before an event,
and again, after an event.

Is there any way we can tune the computer to disregard
any tire pressure sensors readings?

Re-learning between changes is just a PITA.

And I really don't care what the pressures are... I manage them manually.... even for my street tires.

Unreal

LG TPMS box

OR some company reprograms the, but got to mail the BCM in to be programmed.

Or DSX had something he is testing, could be out soon.

0DSX Tuning

I have a fix that plugs into the OBD-2 port. If you'd like to test it out, message me.

You just want to be able to disable all the nannies, right?

NTMD8R

DSX Tuning...

I already have a tune.
I don't want to disrupt that.
I can turn the nannies off via the button on the console.
But because of changing wheels/tires so often, I want to
disable the TPMS Monitor
(or whatever else I can do to stop the computer from putting me into "limp" mode,
when it can't read the TPMS valves).

OR.... does the computer actually care ?

I have not experienced any disruption yet, but when I want to do
a track day, and therefore drive spiritedly for 20 minutes or so,
can I get away without re-learning the computer ?

I don't mind it "doing its thing" with my street wheels (which I have taught the computer about).
I just don't want to have to constantly re-teach it every time I change wheels.

AND... I am running the SoloStorm software which has an ODB2
connector... so I can't run it AND your device.

0DSX Tuning

You can get an OBD2 splitter off of eBay to run two devices together.

Mine doesn't interface with a tune at all.

The only thing this does is tell the ABS module to ignore the tire pressure error.

irok

you don't need to do anything to the computer.I run 3 sets of rims and tires and never have to relearn or reset TPS's.if you install your TPS's in a length of 3" pvc pipe with a cap on each end of tube and a valve stem installed in one cap.with TPS's placed in pipe pressurize the pipe to 30 pounds through valve stem.place pipe in hatch and your good to go.car now thinks you have 30 pounds in all tires.you wont need TPS's in any wheels on the car and it will never set any codes.about $25. to make and 1/2 hour of your time

NTMD8R

irok,
do you train the computer with those 4 sensors first?
If so, how ?
In other words, how does the computer recognize those 4 sensors ?

Unreal

You would have to use a TPMS tool to sync it to those sensors.

NTMD8R

No sweat... I have a tool (from when I had the 2007.... from 2008 to 2014).

OK, buy a piece of 3" PVC about 4 " long, and 2 end caps.
Teach the computer about 4 (new) sensors.
Glue 3 of them inside the pipe.
Drill a hole in one of the ends and fasten the remaining sensor
into it.
Use PVC glue to glue the 2 end caps to the pipe.
Inflate the pressure inside the pipe via that one sensor to 30 lbs.

TADA !!!!

Is this how to do it ?

Thanks in advance.

schpenxel

I'd probably just throw all 4 inside the tube and use something else for the stem on the pipe but either way would work

Or get in touch with Dave and just plug something in. Sounds easier to me.

irok

not quite.buy a regular 2 piece threaded valve stem,drill hole in 1 end cap and install valve stem in cap.nice 2 piece valve stems that can be bought near anywhere come with rubber gasket between the 2 pieces and are leak proof.1 piece on each side of hole drilled in end cap and thread valve stem back together.obviously install your 4 tpms in tube before you glue the caps on.let glue cure for an hour or 2 before adding air to tube.before you glue you can add some type of insulation inside of tube so that sensors do not get damaged over time.make your tube about 8" long.once done just complete your regular steps to program tpms.I only need 4 tpms now and if I used my 4 sets of rims I would need to buy 16 tpms.only using 3 sets of rims now and would be a full time job screwing around with sensors all the time.nothing simpler!!!!when complete test tube for leaks in a pail of water.as I said earlier you now will have no tpms in your rims.most race sanctioning bodies demand metal valve stems in your rims.no rubber valve stems allowed

Unreal

Or find the company that removes it, mail your BCM in, pay the $150 or so, and enjoy to TPMS.

NTMD8R

irok,
great....
must the pipe be 8" long ?, if so, why ?
how can we program each of the TPMS when they are inside the pipe?
(so why not program them before you put them in the pipe ?)

irok

pipe does not have to be 8" long.make any length that all your sensors will easily fit in.in my case my factory sensors are one piece and take up a little more space to fit in.I believe some of the newer sensors you can remove the valve stem from the sensor body and should work this way as well.if your tool allows you to program before putting in a wheel or pipe that will make things easier.tool I used would not program unless pipe pressurized first.they will program fine installed in pipe that is pressureized first.car dosent know whether its in a pipe or in tire on a rim.

NTMD8R

Well, I have been researching this quite a bit now.
Here's a quote from BEZ06 (the forum authority on TPMS), from 2015...
I read (interpret) this to mean (in my case).....
I have my street wheels/tires and their TPMS have been programmed.
All seems well when I drive to car to/from events.
At an event, we change to our autocross wheels/tires.
These have TPMS but I do NOT program them.

As the car is sitting in the pit/paddock area, the street TPMS are transmitting
every hour. Since the car is near these wheels/tires, I expect the car is receiving the signals.

Start car, proceed out to the course, put it in grid, turn car off.

When it is my turn to go, start car (so now that 30 minute time BEZ06 refers to would commence). Get car ready, make run, bring car back into grid for next run, turn car off.
Repeat.
So the 30 minute time limit would restart every time I start the car (I guess).
Since I have not driven the car more than 30 minutes during these runs, (probably 5 minutes at worst, between starting, putting car into TH/AH Off modes, proceeding up to start line, making run (1 minute or less), going back into grid), no errors will show up on DIC.
I could repeat this as many times as I want, with no problems ?

When we want to go home, we remount the street wheels/tires (with activated TPMS), and drive home.

I guess this is why I have not encountered any problems so far this year (8 events so far).

But... if I wanted to do any track days, I would possibly encounter an error, if I went longer than the 30 minutes.

Does this all make sense ? Or am I completely confused and wrong ????

Unreal

It should work. I've driven 3+ months with no TPMS in my tires without an error or code. Factory wheels in garage, park next to them so it syncs up every once and while.

NTMD8R

A problem I envision with the PVC pipe trick, and with merely parking next to the street wheels with sensors.....

The computer will not read/accept the sensor transmission if the car is not turned on.

A Track Day.
Sensors in PVC pipe or in street wheels.
Stop car, change wheels/tires.
Now... when do the sensors in the PVC pipe (or static street wheels) transmit ?
Based on BEZ06 info, they transmit every hour when they are not rotating.

Now, even if the sensors in the PVC pipe or street wheels does transmit,
if the car is not on, it doesn't receive those signals.

How long will the car run un-molested until it gets a signal ..
if earlier than 2008, then you have up to 60 minutes before the computer gets pissed.
If a 2008 (my case), it will be 30 minutes.
If after 2008, it will be 20 minutes.

So now lets drive it.
You have either 20, or 30, or 60 minutes (depending on the year) with no signal....
any more than that, BINGO, computer gets pissed.

So... to stop this from happening.... turn the car off BEFORE your 20 or 30 or 60 minutes
passes.
If the computer should put you into limp mode (as per BEZ06 info),
you can turn car off, turn it back on, reset/clear all the DIC messages,
then you have another 20 or 30 or 60 minutes again.

If you have NOT gone into limp mode yet, merely turn car off before it does go
into limp mode, then when you restart it, you have another 20 or 30 or 60 minutes again.


I think I understand how all this works... I think I have explained it all somewhat
correctly.
I would love for Bob (BEZ06) to chime in here and confirm/correct my info.

poughkeepsie

My 05 has not had sensors since the day I bought it. I've had zero issues or warnings about it.

Unreal

Different years react different.

In this case, I would just mail the BCM out to get the TPMS removed.

irok

there is no problem with the PVC with sensors in it.run as many sets of track and street rim and tire combinations as you like with no sensors in them.no worries with anything timing out or other issues.the car will always go with the sensors in the PVC pipe.the key here is no sensors needed in any wheel