TMS – Tyre Monitoring System
TPMS is a system, fitted to a motor vehicle, which constantly monitors the pressures or pressure imbalance in the tyres and provides a warning to the driver if these fall below a certain threshold such is the importance of correct inflation, TPMS is a very useful safety feature.
However, TPMS should not be seen as a replacement for regular manual tyre safety checks.
Two types of TPMS systems are fitted on cars today. Direct systems use radio sensors mounted inside each wheel to measure the tyre inflation pressures. Indirect systems utilise the vehicle’s existing ABS sensors to measure and compare the rotational speeds of the tyres, which is affected by their pressures. Both types work with the vehicle’s main Electronic Control Unit (ECU) to alert the driver, via onboard warning lights, to any pressure loss or puncture issues.