Control unit
Mounted inside of the dash, the TPMS control unit receives wireless pressure sensor ID signals every time the vehicle speeds exceeds 28 mph (45 km/h). It also receives wireless signals from the transmitters for tire pressure and the sensor condition, and it continuously monitors and controls the system. The TPMS control unit cannot directly determine the position (location) of a tire pressure sensor(s) on the vehicle since it is a wireless system. The TPMS control unit assumes a sensor is in the same location on the vehicle as it was when it was last memorized. TPMS sensor locations will change during scheduled vehicle maintenance (tire rotation).
NOTE:
To determine the actual location of each TPMS wheel sensor on the vehicle, do the tire pressure sensor location procedure (see TIRE PRESSURE SENSOR LOCATION
). Once the tire pressure sensor locations are identified, write the sensor ID on the side wall of the tire with a tire crayon to eliminate confusion.