About TPMS Systems

[Joint Venture II]

Originally Posted by Kris & Al

Need help. My TireMinder is going off on High Pressure (all 4 tires within 15 minutes from cold)
1. Tire gauge says 110 at tire (cold) Tried 3 different gauges and each close to 110
2. TPMS display says 120 (cold)
3. Just tried 2 new tire transmitters and they read 120 at the display
4. Took a transmitter off an RV tire and put it on the truck. Showed exactly what the truck said.
I’m stumped! Need a new set of brains on this. Thanks

What is your high and low pressure alarms set at?

[AZ Traveler]

Originally Posted by Kris & Al

Need help. My TireMinder is going off on High Pressure (all 4 tires within 15 minutes from cold)
1. Tire gauge says 110 at tire (cold) Tried 3 different gauges and each close to 110
2. TPMS display says 120 (cold)
3. Just tried 2 new tire transmitters and they read 120 at the display
4. Took a transmitter off an RV tire and put it on the truck. Showed exactly what the truck said.
I’m stumped! Need a new set of brains on this. Thanks

Sounds like you just need to raise your high pressure warning setting. I would not be real concerned about the 110 vs 120 reading.

[Kris & Al]

TireMinders are set at 20% above tire set point. Tires are 110psi so hi goes off at 131psi. Tires will go up from there 4-6 psi.

My real problem is, where is the problem. Tire senders, Display logic or gauge. Gauge seems OK vs other gauges. Display seems OK when I take senders off RV and put on truck (reads exactly what truck display says). All 4 senders couldn’t have gone bad at the same time plus 2 new senders read the same.

Could change the tire setpoint to 115, so hi limit goes off at 138and fix the problem I suppose. But how high actually damages my Sailuns? Plus high pressure could cause wear problems and a rougher ride.

[jsb5717]

Have you confirmed the tire pressure with a separate tire gauge? I’d start there.

[Kris & Al]

Yup! My first thought was bad gauge. Tried several less expensive gauges and they’re all close. I hate this kind of problem. Nothing makes sense.

[sourdough]

Originally Posted by Kris & Al

Yup! My first thought was bad gauge. Tried several less expensive gauges and they’re all close. I hate this kind of problem. Nothing makes sense.

What about your display is reading the wrong psi from the sensors? I had the same problem and just resolved to live with it. Initially thinking I had some kind of problem I worried, fretted and used about a half dozen different pressure gauges on the tires; all the gauges were very close to each other but the TPMS unit read about 8 lbs. low. No way to recalibrate it other than send it back in and that wasn't worth the time/effort. I just adjusted the set points knowing I was running about 8 psi higher than what the monitor showed. No issues since and no more worrying.

[Kris & Al]

Gauge reads 110 at the tires. Monitor says about 120psi cold. Within 15 minutes after we pull out the Monitor shows over 131 and the “pressure alarm” goes off. All 4 tires go off in the next 5 minutes. At that point, the usefulness is “leak” , “rapid leak” and temperature alarms. Would still like to know if i should ignore the alarm, fool the set point to a higher psi or if I’m overfilling the tires.

[jsb5717]

As Danny said, you could just get used to the differential and adjust your alarms accordingly. I used to have a Tire Minder but I got tired of false alarms so switched to TST 507. Perhaps yours aren't really false alarms if they are measuring from an incorrect starting point.

They can all be a little off and it's easy to get used to once you know where it is.

[Foldbak]

I occasionally get a false reading but it's a blue tooth device so it's to be expected.