TPMS question

[Justin w]

So I bought some Denali black diamond wheels to put on my AT4. New wheels came off a 2021 and mine is a 2021. Bought the tool to relearn the sensors but I can’t get it to pick up the sensors in the new wheels.  Do those sensors have to be programmed to the truck?  I assumed with the tool it would pick up whatever sensor the tool is at since they are the same sensor. The guy I bought these off of said they had been sitting in his garage a couple months. I’ve read where sometimes they have to be “woken” up. Is that right or will I need to take them to a tire shop to be programmed to my truck. 

[redwngr]

Didn't do anything other than the procedure in the manual.

Got the truck is in learn mode (2 chirps) and held the tool against each tire to til  another chirp. 

After the 4th wheel the truck also gave another double chirp

 

Did this with a set of GM take-offs ('21's I think) to my truck this week.

 

 

Edited November 26, 2021 by redwngr

[gemarsh]

I had problems when I rotated tires. Moved the tool all around the stem, no chirp.

 

Did you do as redwngr said and hold the tool under the stem, touching the rubber tire? That is what I learned after screwing around for 15 minutes. 

 

It seems counterintuitive being farther away, but the tool must not penatrate thru metal.

[Justin w]

Yep, held it right where the rim/tire meet. Even tired it on the old tires to make sure the tool was good.  Drove around for a mile or so and it still showed the old tire pressures.  I’ll drive it some more and see what happens. Hopefully it will forget the old sensors. 

[redwngr]

I put the tool fully on the sidewall of the tire, maybe 1/2 -3/4" or so from where the bed and rim meet.

 

I'm wondering if the signal doesn't travel thru the rim as easily as thru the side of tire?? 

 

The tool used was one of the many EL-50448 tools available for about $20. 

(I figure they are all the same except for the printing on the front face) 

 

 

If it didn't chirp as the tool was operated near each tire -- then it won't have paired the new sensors.