To properly reset the iTPMS on a 2016 CX5 (and presumably on all Mazda vehicles of a similar vintage) one has to start the vehicle before resetting. Simply switching the ignition ON, as stated in the manual, prior to pushing the reset button, is incorrect. That will not perform the reset.

I discovered this by talking to the dealer service department, after Firestone (replaced OEM tires) reset the iTPMS twice, and both times the light came on within a few miles. I carefully read the manual, and noted it stated the ignition was to be switched to ON (not started) before resetting. When you do that the light does flash twice and you get the beep. However the reset does not occur. After contacting the dealer and starting the car before pushing the reset button I got the same flashes and beep. However after a 50 mile drive the light is still off.

BTW, there are 2 TSBs on the iTPMS, at least for the 2016 models. One only pertains to a reset the dealer is supposed to perform when the vehicle is delivered. The second is for a fairly elaborate reset ritual to be performed in the event the normal reset doesn't work.

 

The manual probably hasn't been properly updated since the engine does not need to be started for TPMS to reset on the older 2014 models. But, that is a different TPMS system.

 

Would be nice if manufacturers kept their manuals updated ......

 

At least the English used in the manuals is not as bad as I've found in some manuals from Asian manufacturers of various products.