[peanuboy]

Ok, I've tried this on the Wheels/Tires forum and no one has any idea, I am hoping some experts here can point me to the right direction?

original thread

[SGxi]

Slow leaks the FTM can't detect it... it's apparently only work if you have a rapid deflation.

[peanuboy]

Originally Posted by SGxi

Slow leaks the FTM can't detect it... it's apparently on fast leaks.

They were at roughly 10psi and visibly flat then I pumped them up to low 30s on saturday, yet to notice any lost of air, perhaps I'd check the pressure again tonight and see if it's indeed losing pressure slooooooowly.

But I mean since the fronts were once at 10psi, wouldn't the TPMS detected that and notified me?

p.s. tks for the fast response SGxi, I knew folks on the Canada forum are more helpful to fella Canadians

[SGxi]

Originally Posted by peanuboy

They were at roughly 10psi and visibly flat then I pumped them up to low 30s on saturday, yet to notice any lost of air, perhaps I'd check the pressure again tonight and see if it's indeed losing pressure slooooooowly.

But I mean since the fronts were once at 10psi, wouldn't the TPMS detected that and notified me?

p.s. tks for the fast response SGxi, I knew folks on the Canada forum are more helpful to fella Canadians

Canadian cars has the FTM, not the TPMS, unless your car is a US Spec car or have the metal valve stems.

As long as I can be helpful, I don't mind posting the same things a few times... (sometimes I am wrong however)

[peanuboy]

umm, I always thought Cdn cars' TPMS operates without the use of TMPS sensors mounted on wheels and it's through the ABS? and FTM is a separate system?

That's what I gathered reading info online and on the owner's manual anyways... it could be wrong...

So you are saying if I mount, balance and install a tire onto a rim then onto my car and if the tire starts to lose pressure, the system will detect that BUT if I mount the rim already with a flat tire mounted and onto the car, the system won't?

[SGxi]

Originally Posted by peanuboy

umm, I always thought Cdn cars' TPMS operates without the use of TMPS sensors mounted on wheels and it's through the ABS? and FTM is a separate system?

That's what I gathered reading info online and on the owner's manual anyways... it could be wrong...

So you are saying if I mount, balance and install a tire onto a rim then onto my car and if the tire starts to lose pressure, the system will detect that BUT if I mount the rim already with a flat tire mounted and onto the car, the system won't?

We have the FTM only, which is the flat tire monitor - it uses the ABS to detect whether the tire is flat. I remember there is a disclaimer in the manual that says the FTM will not trigger unless it is a rapid deflation, at least that's what I remembered (someone chime in?)

So yes, the system won't tell you you are losing pressure unless your tire loses air quickly while you are driving.

[oncyte]

Originally Posted by peanuboy

umm, I always thought Cdn cars' TPMS operates without the use of TMPS sensors mounted on wheels and it's through the ABS? and FTM is a separate system?

That's what I gathered reading info online and on the owner's manual anyways... it could be wrong...

So you are saying if I mount, balance and install a tire onto a rim then onto my car and if the tire starts to lose pressure, the system will detect that BUT if I mount the rim already with a flat tire mounted and onto the car, the system won't?

Nope...TPMS requires sensors in the wheels and monitor all pressure levels.

FTM is based on rotation so if all your wheels have the same pressure regardless of it being low the system won't detect anything. Did both your front tires lose air?

And my buddy has an 2008 E92 335i and it came with 230s with the metal valve stems but his car had FTM and not TPM. Most likely you have the FTM system.

Best way to confirm which system you have is give your dealer your VIN to get a detailed print out of your car.

[SGxi]

Here we go.

Read the "System Limitation" section.

It looks like I am wrong. It only applies to gradual loss of air on all four tires.

It does appear if the system is not reset after the new wheels has been installed, the system will not function properly.

[peanuboy]

Originally Posted by oncyte

Nope...TPMS requires sensors in the wheels and monitor all pressure levels.

FTM is based on rotation so if all your wheels have the same pressure regardless of it being low the system won't detect anything. Did both your front tires lose air?

And my buddy has an 2008 E92 335i and it came with 230s with the metal valve stems but his car had FTM and not TPM. Most likely you have the FTM system.

Best way to confirm which system you have is give your dealer your VIN to get a detailed print out of your car.

The deflated tires were on the rims when they were installed, and the installer DID NOT air them up after installing the rims for me

and I drove off and noticed the deflated tires in the front after a few KMs and aired them up.

I don't I have metal valve stems (TMPS sensors?) so most likely I have FTM.

I will get my dealer to get me a detailed print out for my car next time I am there, it'd be very helpful not only for this.

[peanuboy]

Originally Posted by SGxi

Here we go.

Read the "System Limitation" section.

It looks like I am wrong. It only applies to gradual loss of air on all four tires.

It does appear if the system is not reset after the new wheels has been installed, the system will not function properly.

hmm, I see so our Cdn cars don't actually have tmps, but FTM rather, gotta reset it tonight to make it work properly

I read that before on my owner's manual, just didnt know I had to reset it after putting on summer rims and even without the warning going off.

Last year when Iput on witner wheels, the system threw me an error and I had to go back to the dealer to have that reset, I followed the instructions on the manual tresetting it on my own but it didn't get rid of the warning. That's y this time around I was a little eeked at the fact that I am not seeing any warnings and found out my fronts are totally flat.

tks for the info

[who's ur daddy?]

Whatever the hell it is, I don't think it works. I had an absolute failure of my front pax tire - zero pressure - and it did not signal. I tried to drive on the tire to the tire shop and ultimately the tire tread started to separate from the sidewall and it still did not signal.

Crap system.

[SoCalTech]

If you reset the system with the tires at 10 psi, then the system will think that it's fine. when you initialize/reset the system, you are telling the car that the tires are how you want them at that time. It remembers the relation of how fast they turn compared to each other. Only if you get a loss in one of the tires, which will cause a difference in the comparative rotation speed, will the warning light up.

[peanuboy]

Originally Posted by SoCalTech

If you reset the system with the tires at 10 psi, then the system will think that it's fine. when you initialize/reset the system, you are telling the car that the tires are how you want them at that time. It remembers the relation of how fast they turn compared to each other. Only if you get a loss in one of the tires, which will cause a difference in the comparative rotation speed, will the warning light up.

I just reset the FTM today with the tires at roughly 35psi, hopefully that's the correct way and IF i ever have a flat, it will work, tks for all the input

with all that said, am I correct to conclude our Cdn cars dont have TMPS, but FTM rather?

[marcvtec]

Honestky as stated by a few other members the canadian cars will not monitor PSI.

My original 230's had TPMS in the rims but completely useless

Just check your tire pressure once a month like I do

[Soni]

My works perfectly! I had a small leak on one of my rear due to the valve rubber. I got warning light when psi was low for few times.

[SGxi]

Originally Posted by peanuboy

I just reset the FTM today with the tires at roughly 35psi, hopefully that's the correct way and IF i ever have a flat, it will work, tks for all the input

Make sure you also reset it properly. For awhile, I didn't reset my system correctly.

with all that said, am I correct to conclude our Cdn cars dont have TMPS, but FTM rather?

For all cars before 2008, yes. At least not the part in the computer that tells you the leak. I believe some people has wheels with the metal valve stems but it still uses the FTM.

[peanuboy]

Originally Posted by SGxi

For all cars before 2008, yes. At least not the part in the computer that tells you the leak. I believe some people has wheels with the metal valve stems but it still uses the FTM.

mine is a 2008 (Feb/March built), I will defintely ask for a detail print out of my car next time I am at the dealer