14Sport

Agree. From everything I've read the spare is not monitored. Many people ride with no spare and I don't think they all reprogrammed to shut off the tpms.

casamtb

The dTPMS sensors do transmit always. So all tires are picked up by the main system as a general rule. For systems that have a specific tire location detection, this is picked up by the ABS/ESC systems at the brakes. How this information is specifically calculated and alerted would be a question for the Jeep software engineers. But yes, the spare is being 'picked up' by the system. How the alert back is being picked up is a function of the ABS/ESC sensors and software.

AngryRedBird

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14Sport

I know the sensors always transmit, but it's the receivers that report the signals. I believe the receivers are wheel specific. If the sensor/receivers are part of the ABS, then where is the receiver for the spare? I don't believe the spare has one. But I certainly could be wrong.

I read a while back what the process is that triggers the tpms receivers to read the sensors again. I'll see if I can find it. It's pretty complicated and explains why some people's tpms light shuts off quicker than others when a repair/swap is made.

Chefbrujo

This is a mighty long thread to be discussing tpms lol

14Sport

Couldn't find the explanation for the reset logic in the computer. Sorry.

AngryRedBird

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