Post by
esy »
https://forums.nicoclub.com/esy-u178591.html
Fri Apr 15, 2011 5:35 pm
direct sensors monitor all wheels with sensors. not sure if the older sensors were any different, but any and all vehicles that have 5 sensors, air has to be checked in all. several times over it has been the spare that needed air in the vehicles i've worked on with 5 sensors.
you may be thinking of indirect sensors that operate off of the ABS and speed sensors where the TPMS can only monitor four at a time. if it's a direct system, the sensors send info to the brain constantly.