GR Yaris TPMS pressure no show!

[Nixkf]

i put my winter wheels on the other day. Done the usual faffel with the TPMS, warning light went out on the 1st attempt, happy days usually takes a couple attempts.
I thought I’d check the pressures yesterday to see what the car says they are, no pressure readings, no TPMS warning light.
not the first time these wheels have been on the car.

anyone else had this?

 

[Dan_D]

I have exactly the same problem. No warning light but no pressure readings shown, it's been a week since fitting the winter set. Carista is showing all the sensors in the right place and reporting pressures as well.

 

[area_educator]

It sounds like you cancelled the 'locating sensors' search.

I had this last winter, and in my case the sensors were working and broadcasting (my handheld TPMS reader has no problem with them) and the car, it turns out, _was_ _listening_ to them (so, good news). I came out to an unnoticed flat tire and the dash light came on almost immediately upon moving. It wouldn't/couldn't tell me which wheel or the pressure (though I had no troubling figuring that out...). Unfortunately, I also had a number of false alarms from it throughout the winter (and not from temperature-related pressure drops). It usually went away pretty immediately, but a couple of times I found somewhere to pull off and check with my handheld reader.

They're not OEM sensors, but they and the hand-held reader both report that they're of the correct type. ::

How it happened last winter: I tried to have it find the sensors, it never said it did even after 100s of km. I finally cancelled the search and suddenly it found them-- locations and pressures and everything. Then I stupidly did the 'set pressures' thing to calibrate them, and the car lost them never to find them again. Cancelled the search, but I couldn't replicate the earlier thing where it randomly found them.

This winter, with new tires, the handheld reader still has no problem, but the car still can't find them and now when I cancel the search I get a permanent (until I restart the search) message about a TPMS malfunction.

 

[Dan_D]

Thanks, sounds like you've not had the easiest time with it as well!

I've got a long journey planned tomorrow, will run the locating sensors command again and see if there's an improvement.

 

[gr-fun]

Remember if you are trying to connect, don't select reverse after you have started the procedure. Reverse cancels the request.

 

[Dan_D]

Retrying the sensor search worked for me, eventually. Took an hour and around 40 miles on the motorway to do so. The cheaper non OEM sensors could be part of the issue, at least they're ok once connected.

 

[Chris64]

Yes I had the same issue this time too - I did the 'initialising' procedure first as the winter wheels/sensors have been on before over the last two winters and the manual (p119) says you can do that to switch between previous wheelsets (pretty sure it's worked quickly when putting the OEM summer wheels back on). But it didn't like that, took ages then threw up the warning light.

Then I did the fuller 'registering' procedure (p120) as if they were new sensors, and after a while the warning light went out and I thought it would all be sorted, but rather than displaying the pressures it just showed the three little lines symbols as you both describe. I just left it though, and after a week or two they popped up on their own and have been fine since.

Not really sure how the process seems to vary each spring/winter, it's wierd!

 

[Nixkf]

I had the same as you @Chris64. Got in the car this morning about 15 minutes into my journey, scrolled through the menu and all 4wheels registering pressure.