Which statement is true about tire pressure monitoring systems?

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Multiple Choice

Which statement is true about tire pressure monitoring systems?

Tire pressure monitoring systems fall into two approaches: direct and indirect. A direct TPMS uses sensors mounted inside each tire to measure the actual air pressure and sends that data to the vehicle’s control system, giving precise readings and indicating exactly which tire is under-inflated. An indirect TPMS does not measure pressure with sensors in the tire; instead it uses wheel-speed data from the ABS system to infer under-inflation by detecting changes in the tires’ effective rolling circumference. The other statements aren’t correct because ABS is a separate system, not a type of TPMS; TPMS doesn’t monitor fuel pressure; and TPMS is indeed used on passenger cars.

Tire pressure monitoring systems fall into two approaches: direct and indirect. A direct TPMS uses sensors mounted inside each tire to measure the actual air pressure and sends that data to the vehicle’s control system, giving precise readings and indicating exactly which tire is under-inflated. An indirect TPMS does not measure pressure with sensors in the tire; instead it uses wheel-speed data from the ABS system to infer under-inflation by detecting changes in the tires’ effective rolling circumference. The other statements aren’t correct because ABS is a separate system, not a type of TPMS; TPMS doesn’t monitor fuel pressure; and TPMS is indeed used on passenger cars.

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