Upon mounting snow wheels (meaning tires + rims + aftermarket TPMS valves) to my 2015 Suzuki Vitara, I have had to drive at above city speed levels for some 10-15 minutes in order for the TPM ECU to pick up in-tire sensor readings. Prior to those 10-15 minutes there was no pressure reading on the vehicle's HUD. (And no, no dealership or whatsoever programming of the new sensors was required. The car just picked them up by itself)
Actually this being a new set of wheels does not make any difference really. Even with the old wheels it was the same deal - i.e. had to drive around for some minutes until a first TPMS reading displayed on the HUD. What I would like to know is why this happens, and more importantly how it happens?