No tire pressure monitor sensor

DannyP · 04-09-2012, 07:21 PM

I bought a used Canadian 2011 335i and I noticed that it does not have tpms, but the iDrive has a function for reset. Does anyone has seen this before?

Bendercle · 04-09-2012, 07:36 PM

Maybe someone disabled the TPMS? Can be accomplished by pulling the fuse, coding, and unplugging the RDC module in the trunk. Sometimes people do this if the wheels they buy don't come with TPMS. I'm currently in the process of doing it because the sensors are broken or something and I don't want to pay to replace them.

Dem3ern · 04-09-2012, 07:36 PM

Are you sure that the wheels which came with it are equipped with the sensors? does that car not recognize any pressures or presence of the sensors when you reset tpms?

J02 335i · 04-09-2012, 07:37 PM

Canadian car's use the wheel speed sensors (ABS) for TPM's so there are no sensors in the wheels. So there is just a light that comes if the tire is low (yellow) and (red) light for when the tire is flat.

DannyP · 04-09-2012, 11:48 PM

Days later one of the front tires was completely flat and yellow or red lights came up. What I pulled out by Carfax is that the car is clean. If anyone else can help I'll appreciate. Thanks!

J02 335i · 04-10-2012, 04:25 AM

Quote:

Originally Posted by DannyP

Days later one of the front tires was completely flat and yellow or red lights came up. What I pulled out by Carfax is that the car is clean. If anyone else can help I'll appreciate. Thanks!

Not to sure what Carfax has to do with a flat. Sorry op I'm a little confused as to what your saying here?

DannyP · 04-10-2012, 07:34 AM

I purchased the car through a dealer that brought the car from Canada. I checked carfax to see if there were any problem with car. It came ip clean. After I purchased the car I noticed that the tire didn't had tpms cause I had flat tire and it didn't indicated that I had a flat one I checked the iDrive under vehicle info and it had flat tire monitor but all four tires indicated that were ok. So if you say that canadian cars doesn't have tpms how does really work? Cause it didn't light up neither a yellow or red light.

ChasVS · 04-10-2012, 08:08 AM

Canadian BMWs use what is called Indirect TPMS

Indirect TPMS do not use physical pressure sensors but measure air pressures by monitoring individual wheel rotational speeds and other signals available outside of the tire itself. First generation iTPMS systems utilize the effect that an under-inflated tire has a slightly smaller diameter (and hence higher angular velocity) than a correctly inflated one. These differences are measurable through the wheel speed sensors of ABS/ESC systems. Second generation iTPMS can also detect simultaneous under-inflation in up to all four tires using spectrum analysis of individual wheels, which can be realized in software using advanced signal processing techniques. The spectrum analysis is based on the principle that certain eigenforms and frequencies of the tire/wheel assembly are highly sensitive to the inflation pressure. These oscillations can hence be monitored through advanced signal processing of the wheel speed signals. Current[when?] iTPMS consist of software modules being integrated into the ABS/ESC units.

iTPMS cannot measure or display absolute pressure values, they are relative by nature and have to be reset by the driver once the tires are checked and all pressures adjusted correctly. The reset is normally done either by a physical button or in a menu of the on-board computer. iTPMS are, compared to dTPMS, more sensitive to the influences of different tires and external influences like road surfaces and driving speed or style. The reset procedure, followed by an automatic learning phase of typically 20 to 60 minutes of driving under which the iTPMS learns and stores the reference parameters before it becomes fully active, cancels out many, but not all of these. As iTPMS do not involve any additional hardware, spare parts, electronic or toxic waste as well as service whatsoever (beyond the regular reset), they are regarded as easy to handle and very customer friendly.

wrickem · 04-10-2012, 08:12 AM

Quote:

Originally Posted by J02 335i

Canadian car's use the wheel speed sensors (ABS) for TPM's so there are no sensors in the wheels. So there is just a light that comes if the tire is low (yellow) and (red) light for when the tire is flat.

I understood you.

J02 335i · 04-10-2012, 06:33 PM

Quote:

Originally Posted by wrickem

I understood you.

Thanks, Im glad somebody did lol.

04-09-2012, 07:21 PM	#1
DannyP Private First Class 18 Rep 123 Posts Drives: 2013 Glacier Silver F30 335i Join Date: Sep 2007 Location: San Juan, PR iTrader: (0)	No tire pressure monitor sensor I bought a used Canadian 2011 335i and I noticed that it does not have tpms, but the iDrive has a function for reset. Does anyone has seen this before?
	Appreciate 0 Tweet Quote

04-09-2012, 07:36 PM	#2
Bendercle Banned 17 Rep 263 Posts Drives: 2007 335xi 6MT Join Date: Jan 2012 Location: North Shore MA iTrader: (3)	Maybe someone disabled the TPMS? Can be accomplished by pulling the fuse, coding, and unplugging the RDC module in the trunk. Sometimes people do this if the wheels they buy don't come with TPMS. I'm currently in the process of doing it because the sensors are broken or something and I don't want to pay to replace them.
	Appreciate 0 Quote

04-09-2012, 07:36 PM	#3
Dem3ern Private 9 Rep 80 Posts Drives: X4 M40i Join Date: Apr 2012 Location: SE Michigan iTrader: (0) Garage List 2008 BMW 335i Coupe [10.00]	Are you sure that the wheels which came with it are equipped with the sensors? does that car not recognize any pressures or presence of the sensors when you reset tpms?
	Appreciate 0 Quote

04-09-2012, 07:37 PM	#4
J02 335i Lieutenant Colonel 39 Rep 1,558 Posts Drives: F80 M3 Join Date: Aug 2010 Location: Ontario iTrader: (1)	Canadian car's use the wheel speed sensors (ABS) for TPM's so there are no sensors in the wheels. So there is just a light that comes if the tire is low (yellow) and (red) light for when the tire is flat. __________________ Sport pack, JB3, Dci, factory oil cooler, 18" M3 reps, Michelin PSS, painted trim, black grills, smoked side markers, LED plate lights, H&R coils, Borla catback
	Appreciate 0 Quote

04-09-2012, 11:48 PM	#5
DannyP Private First Class 18 Rep 123 Posts Drives: 2013 Glacier Silver F30 335i Join Date: Sep 2007 Location: San Juan, PR iTrader: (0)	Days later one of the front tires was completely flat and yellow or red lights came up. What I pulled out by Carfax is that the car is clean. If anyone else can help I'll appreciate. Thanks!
	Appreciate 0 Quote

04-10-2012, 07:34 AM	#7
DannyP Private First Class 18 Rep 123 Posts Drives: 2013 Glacier Silver F30 335i Join Date: Sep 2007 Location: San Juan, PR iTrader: (0)	I purchased the car through a dealer that brought the car from Canada. I checked carfax to see if there were any problem with car. It came ip clean. After I purchased the car I noticed that the tire didn't had tpms cause I had flat tire and it didn't indicated that I had a flat one I checked the iDrive under vehicle info and it had flat tire monitor but all four tires indicated that were ok. So if you say that canadian cars doesn't have tpms how does really work? Cause it didn't light up neither a yellow or red light.
	Appreciate 0 Quote

04-10-2012, 08:08 AM	#8
ChasVS Colonel 40 Rep 2,431 Posts Drives: 2012 MB ML350 Bluetec Join Date: Aug 2009 Location: Central FL iTrader: (10)	Canadian BMWs use what is called Indirect TPMS Indirect TPMS do not use physical pressure sensors but measure air pressures by monitoring individual wheel rotational speeds and other signals available outside of the tire itself. First generation iTPMS systems utilize the effect that an under-inflated tire has a slightly smaller diameter (and hence higher angular velocity) than a correctly inflated one. These differences are measurable through the wheel speed sensors of ABS/ESC systems. Second generation iTPMS can also detect simultaneous under-inflation in up to all four tires using spectrum analysis of individual wheels, which can be realized in software using advanced signal processing techniques. The spectrum analysis is based on the principle that certain eigenforms and frequencies of the tire/wheel assembly are highly sensitive to the inflation pressure. These oscillations can hence be monitored through advanced signal processing of the wheel speed signals. Current[when?] iTPMS consist of software modules being integrated into the ABS/ESC units. iTPMS cannot measure or display absolute pressure values, they are relative by nature and have to be reset by the driver once the tires are checked and all pressures adjusted correctly. The reset is normally done either by a physical button or in a menu of the on-board computer. iTPMS are, compared to dTPMS, more sensitive to the influences of different tires and external influences like road surfaces and driving speed or style. The reset procedure, followed by an automatic learning phase of typically 20 to 60 minutes of driving under which the iTPMS learns and stores the reference parameters before it becomes fully active, cancels out many, but not all of these. As iTPMS do not involve any additional hardware, spare parts, electronic or toxic waste as well as service whatsoever (beyond the regular reset), they are regarded as easy to handle and very customer friendly. __________________ My speeding isn't the problem. It's the Slow Folks ahead of me that cause accidents!
	Appreciate 0 Quote