TPWS - how is the info displayed?

[Tony B]

I understand that the TPWS uses the tyre valve pressure sensors/transmitters (rather than monitoring tyre rotation) - can anyone provide a picture of how this is displayed on the i-Drive?

Is it just OK/Not OK, or are the actual pressures displayed?

(My car, like all Euro-spec cars with TPMS, only displays a low-pressure or puncture warning flag, without any pressure display)

TIA

[Tony B]

Originally Posted by Tony B

I understand that the TPWS uses the tyre valve pressure sensors/transmitters (rather than monitoring tyre rotation) - can anyone provide a picture of how this is displayed on the i-Drive?

Is it just OK/Not OK, or are the actual pressures displayed?

(My car, like all Euro-spec cars with TPMS, only displays a low-pressure or puncture warning flag, without any pressure display)

TIA

Time for a really polite bump.

I just need to know how US spec E9x CIC cars display tyre (oops...tire) pressure info.

Is it by showing actual pressures (psi/bar) or just Green/Not Green?

Are tyre temperatures also displayed?

TIA2

[Dpc2u]

Originally Posted by Tony B

I understand that the TPWS uses the tyre valve pressure sensors/transmitters (rather than monitoring tyre rotation) - can anyone provide a picture of how this is displayed on the i-Drive?

Is it just OK/Not OK, or are the actual pressures displayed?

(My car, like all Euro-spec cars with TPMS, only displays a low-pressure or puncture warning flag, without any pressure display)

TIA

Just green or otherwise, no pressure or temp display.

[Tony B]

Originally Posted by Dpc2u

Just green or otherwise, no pressure or temp display.

Thank you for confirming this!

And the status for your car is driven by pressure sensors in the tyre valves, not by relative wheel rotation speeds (as is the case for Euro/UK spec cars)?

I wonder why they went to the additional cost of doing this via the tyre valve method. Unless it is actually more accurate than relative wheel rotation.

[Cyberdemon]

Originally Posted by Tony B

Thank you for confirming this!

And the status for your car is driven by pressure sensors in the tyre valves, not by relative wheel rotation speeds (as is the case for Euro/UK spec cars)?

I wonder why they went to the additional cost of doing this via the tyre valve method. Unless it is actually more accurate than relative wheel rotation.

The E9X had two options, TPMS which uses the sensors in the valve stems and FTM which uses rotational speed.

TPMS sensors are generally more accurate but the E9X can't display the individual pressures or temperatures. That feature wasn't available until the F3x/NBT platform.

[Tony B]

Originally Posted by Cyberdemon

The E9X had two options, TPMS which uses the sensors in the valve stems and FTM which uses rotational speed.

TPMS sensors are generally more accurate but the E9X can't display the individual pressures or temperatures. That feature wasn't available until the F3x/NBT platform.

Thank you for clearing this up.

I was toying with the idea of retrofitting the necessary hardware, and wheel sensors, but this confirms that the effort/cost will not be worth it!