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[M3E46M]

Hello guys, I was wondering if there is a way to read tire pressure while driving off each TPMS? The computer has to have a way to read that info and give you a warning light so just wondering if it is possible to read live data off tire pressures via TPMS while driving?

[wobbles1]

Originally Posted by labedra

Hello guys, I was wondering if there is a way to read tire pressure while driving off each TPMS? The computer has to have a way to read that info and give you a warning light so just wondering if it is possible to read live data off tire pressures via TPMS while driving?

Nope. it takes up 2 one minute to get readings From live data even on an ISID using diagnostic query. Meaning even if I let out 2 bar it wont see it for that long. You can completely empty a tire and it wont register for miles.

[TOPEC]

nope, tpms on bmws r passive which reads difference in tire rotation via abs ring vs active where it reads actual pressure inside each wheel.

[wobbles1]

Originally Posted by TOPEC

nope, tpms on bmws r passive which reads difference in tire rotation via abs ring vs active where it reads actual pressure inside each wheel.

Pre-LCI E90s don't have TPMS sensors on the wheel, rather they have rotational sensors.
All LCI have tpms which read pressure not rotation.

[username604]

Originally Posted by wobbles1

Pre-LCI E90s don't have TPMS sensors on the wheel, rather they have rotational sensors.
All LCI have tpms which read pressure not rotation.

are you saying i don't have to replace my tpms if i change my wheels? wouldn't run-flats retard the purpose of rotational sensors?

[Tom K.]

Originally Posted by TOPEC

nope, tpms on bmws r passive which reads difference in tire rotation via abs ring vs active where it reads actual pressure inside each wheel.

Not true for the OP who is in the US. Canada uses FTM (comparing wheel rotation), US has TPMS (individual sensors in each tire) mandated by law.

Tom

[Tom K.]

Originally Posted by wobbles1

Pre-LCI E90s don't have TPMS sensors on the wheel, rather they have rotational sensors.
All LCI have tpms which read pressure not rotation.

Not true. The changeover to TPMS from FTM for the US market occurred early in the 2007 model year - which was pre LCI.

Tom

[Tom K.]

Originally Posted by labedra

Hello guys, I was wondering if there is a way to read tire pressure while driving off each TPMS? The computer has to have a way to read that info and give you a warning light so just wondering if it is possible to read live data off tire pressures via TPMS while driving?

Other cheaper cars have this feature - but not BMW. Since the newest ScanGauge does not include tire pressure readouts, I'd assume this info isn't available at the OBDII port.

This capability is available as a $250 option on some BMW motorcycles.

Tom