Technician A says that a tire pressure monitor system that uses a valve-stem-type transmitter is the direct reading type of TPMS. Technician B says that a tire pressure monitoring system that uses a sensor inside and strapped to the wheel is an indirect reading type of TPMS. Which technician is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because a valve-stem-type transmitter is part of a direct TPMS, which measures tire pressure directly from within the tire. Technician B is incorrect because a sensor strapped to the wheel is also a part of a direct TPMS system, not an indirect TPMS. Indirect TPMS systems measure tire pressure indirectly through the vehicle's antilock braking system (ABS) sensors by comparing rotational speeds of the tires.

Technician a Says That a Tire Pressure Monitor System That