OK, Page 216 of the 08 owners manual has a rather large box bold typed "CAUTION!" in the left hand 'column'. In the box it describes (kinda ambiguously) the TPMS ans the light in the dash. Last sentence states The vehicle needs to be driven above 20mph in order for the TPMS to receive the information. In totality, the cautionary statement leads you to believe the tire will transmit (with a nominal system) when the wheel is (going) the equiv of 20 mph or above. So, is the manual not descriptive enough? I'll now delve into the service manual and come back!


I JUST LOVE THESE SERVICE MANUALS! With that said, page 22-60 of the 08 service manual set titled SENSOR subset OPERATION (lower page) Para 3 states (in totality) the sensor sends a signal only when the tire is rotating at an approximate speed of 20mph (nominally). I am sure the other various manuals will have the same information located in there UNLESS different year models use a different model sensor pack (of 4). This makes total sense as a magnet is used to complete the switch during calibration, as it is pretty hard to locate a tool while driving (at each wheel) to verify the operation/codes of said wheel sensor. So, in totality, the sensors only transmit when rotating, and the TPMS receiver only holds/displays past/current or a malfunction to the warning lamp.