The TPMS has to be cleared by a scantool
Indirect Systems uses the vehicle's antilock braking system's wheel speed sensors to compare the rotational speed of one tire vs. The others. If one tire is low on pressure, it will roll at a different number of revolutions per mile than the other three tires, and alert the vehicle's onboard computer.
Saturday, September 29th, 2007 AT 5:49 AM