Monitoring the factory supplied tpms on the toad

I can't be sure, but I think you have to use steel valve stems with stem mounted sensors. I think it would be a good idea, anyway.

TPMS or a low pressure warning system? DOT requirement on SUVs was only for the latter, some manufacturers monitor pressure, but maybe Go-NoGo, others use the antiskid sesnsing equipment to identify a low tire based on rotation speed differences. I have a 2013 Ford that does this one way, and a 2012 Honda that does it the other,

Either way it is handled through the car's compute, which has to be running to process the inputs into warnings at the instrument panel or information center display. Engine may or may not need to be running, it is hard to say without knowing just how things are integrated for a particular model.

If the car is using pressure sensors, and those use radio to report to the engine control or stability systems, it is still unlikely that a third party TPMS will pick up the signals and understand them properly.

portscanner wrote:

lanerd wrote:

portscanner wrote:
If I add an additional TPMS system - should I re-balance the tires?

Nope! :C

Sorry - but I got to ask the question - why not? I am adding weight to the one side of the wheel.

The TST 507 standard external sensors only weigh 13 grams.

I have looked and didn't find a system.

Thought about trying to make my own with a light sensing diode to send a signal to me in the motorhome.

One problem is you would need to leave the ignition on while towing.

The OEM TPMS is part of the cars CAN or electronics system eg the ignition, emissions, TPMS is all rolled into one processing system.

It is so minor that it won't make any difference. However, if you do want your tires to be perfectly balanced, then by all means, rebalance them after you install the sensors.

I've used mine on three different toads for the past 7 years, and not once have I noticed any of the 12 tires to be out of balance or wear abnormally.

lanerd wrote:

portscanner wrote:
If I add an additional TPMS system - should I re-balance the tires?

Nope! :C

Sorry - but I got to ask the question - why not? I am adding weight to the one side of the wheel.

portscanner wrote:
If I add an additional TPMS system - should I re-balance the tires?

Nope! :C

I use the TST external tpms for the Sonic. Used them on a Jeep Liberty.

Did not balance tires on either vehicle after install. Not a problem for me.

TST TPMS has been another great tool for RV'n and monitoring tires. I especially like that I can replace the batteries myself. Easy to do. So far replaced one battery. The other batteries are the originals and working since May 2013.

If I add an additional TPMS system - should I re-balance the tires?

Your better bet is to get a TPMS system for the RV that will also let you put sensors on the toad's tires. I have a TPMS on the RV that would do that if I chose to buy 4 more sensors.

TST System plus 4 additional sensors will keep the RV and the toad tires inflated.