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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > Viewing measured tire pressure



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      11-19-2012, 04:19 PM   #1
alexwhittemore
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Viewing measured tire pressure

So I'm PRETTY SURE my car (e90 LCI 328i) has active tire pressure monitoring. In the BC menus, I can set the pressure units to either PSI or kPa, suggesting that somewhere, actual pressure values will be displayed. The question is, where? Is there anywhere to actively look at the tire pressures? Does the measured pressure pop up if the TPMS flags it as low?
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      11-19-2012, 07:54 PM   #2
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Quote:
Originally Posted by alexwhittemore View Post
So I'm PRETTY SURE my car (e90 LCI 328i) has active tire pressure monitoring. In the BC menus, I can set the pressure units to either PSI or kPa, suggesting that somewhere, actual pressure values will be displayed. The question is, where? Is there anywhere to actively look at the tire pressures? Does the measured pressure pop up if the TPMS flags it as low?
Unlike some other manufacturers, BMW does not chose to display actual individual tire pressures. I have no idea why there is a iDrive setting for pressure units - it's not available on non iDrive equipped one series models - but it is apparently a dummy setting for the US. So if you discover some way of getting a psi display, let us know!

Depending on the year and software reflash, the TPMS error message will indicate which tire is low. It generally comes on when the pressure has dropped about 25% below the baseline setting.

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      11-19-2012, 08:00 PM   #3
alexwhittemore
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Hmm. Sounds like I'll have to break out the compressor/gauge/can cable and fiddle+pray.

EDIT: So there's this, in KOMBI

K4116_C_TEMPERATUR_1
wert_02
K4116_C_TEMPERATUR_2
wert_02
K4116_C_TEMPERATUR_3
wert_02
K4116_C_TEMPERATUR_4
wert_02
K4116_D_TEMPERATUR
wert_02
K4119_C_DRUCK_1
wert_03
K4119_C_DRUCK_2
wert_03
K4119_C_DRUCK_3
wert_03
K4119_C_DRUCK_4
wert_03
K4119_D_DRUCK
wert_03

Druck=pressure, and temperatur is interesting since, in some iDrive models, tire temperature is displayed as well. Of course, I have no idea what the wert_03 setting corresponds to.

Hmm. There's also

AUSWERTUNG_B_DRUCK

in CAS, default nicht_aktiv. Setting active doesn't seem to change anything.

Last edited by alexwhittemore; 11-19-2012 at 09:30 PM.
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      11-21-2012, 02:51 AM   #4
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Anybody else have any input?
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      11-23-2012, 08:01 AM   #5
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I have been told that the e90 M3 was supposed to have active tire monitoring but was not implemented. This may be junk coding left behind because it was cheaper than going in to remove it. I am going to look into it though because I would love the feature for track use.
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      11-23-2012, 10:24 AM   #6
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I would like to know as well. I have this feature on my FX35 and it's nice to be able to see the cold and hot pressures real time.
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      11-23-2012, 10:54 AM   #7
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It's available on the F-series (coding).

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