Quote:
Originally Posted by androdev
Thanks ceb. You are right, my car only has FTM. I have used TPMS in a generic way - for instance VW calls it TPMS (at least in India) even though it is ABS based indirect pressure loss detection.
Are you sure that FTM won't detect a drop from 30psi to 15psi - even when driven at 100 kmph? Hmmm.. that is a bummer for a bimmer, considering the cost of RFTs!
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It "should" detect it but the RFTs make it more difficult. FTM works by detecting differences in the outside rolling diameter of the tire from one tire to another.
Since RFT sidewalls keep the rolling diameter of an underinflated tire similar to the other tires, then the FTM has a hard time detecting the pressure loss.
That said, it should detect the fairly high pressure loss you described but the system may not have been set up properly initially.