TPMS stops reading pressure

[Mocopo]

Ah interesting, ya I do one at a a time. For me its just a mild annoyance not really worth worrying about, but your predicament would definitely be worse.

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[Ratbert]

Ah interesting, ya I do one at a a time. For me its just a mild annoyance not really worth worrying about, but your predicament would definitely be worse.

Four-at-once air up is really awesome when TPMS works. I'm much more likely to air down now.

 

[J0E]

Ok, so the fact that it worked as expected in my 2020 was a fluke, and all of the videos showing how the Epic Kraken works are also just flukes?

I'm not sure how that system would work if it required you to drive. Connect everything up to ask four tires, hit the button for some period of time, turn it off, disconnect everything from all four tires, drive from the air up spot, return to it, repeat???

And yet that's what the directions say. You're not the only one to report the static readings aren't reliable.

In my previous JLUR (2020) I just had to have the engine running for the TPMS to be fairly accurate while airing up.

As many others have reported on all years, contrary to the owners manual.

I have the Epic Kraken inflation system, so no external pressure gauge. All of the videos that I've watched for it indicate to simply watch the TPMS readings, which worked as expected in my last JLUR.

$400 and they don't give you a gauge?

You will need an ARB Twin Compressor (CKMTA12) - sold separately- Wow $400 , my $100 quad compressor with gauges is looking better all the time.

How do you air down?

 

[Cuyose]

Not a dig on poster, but in a vehicle where you air up and down all the time, why not invest in an accurate tire pressure monitor? Sure it may take a couple second longer to check while filling up, but thats going to be more accurate than the tpms and much more reliable.

 

[J0E]

It might be more accurate, but you really think that it's easier?

Way easier. Just add a gauge to your air up system. Use MSS (Manual Stop Start) and turn off the engine. While the pump is running it's as accurate as the TPMS system. Turn off the pump to get a more accurate reading. Get a decent gauge. It doesn't need to be a calibrated, guaranteed 1% accurate Ashcroft like mine.

 

[Ratbert]

And yet that's what the directions say. You're not the only one to report the static readings aren't reliable.



As many others have reported on all years, contrary to the owners manual.



$400 and they don't give you a gauge?

You will need an ARB Twin Compressor (CKMTA12) - sold separately- Wow $400 , my $100 quad compressor with gauges is looking better all the time.

How do you air down?

Why would a gauge be required when the TPMS does the same thing?

And yes, the Epic Kraken is pretty damn awesome. It's so much easier to air up now...so much so that I no longer question whether to air down or not. My wife wants to air down even when we're simply taking the shortcut over the mountain behind us.

To air down I typically use Staun deflaters. I'm a big proponent of doing all four tires at once.

When these were overinflated and I needed to drop about 5psi from each I just hooked up the Kraken and used their purge valve and the (for some reason working?) TPMS. Much simpler than doing each tire separately. An added benefit is that they're all the same pressure.

 

[Ratbert]

Way easier. Just add a gauge to your air up system. Use MSS (Manual Stop Start) and turn off the engine. While the pump is running it's as accurate as the TPMS system. Turn off the pump to get a more accurate reading. Get a decent gauge. It doesn't need to be a calibrated, guaranteed 1% accurate Ashcroft like mine.

If all four tires are connected then wouldn't a gauge on one of the lines show zero PSI?

 

[Ratbert]

To the naysayers suggesting that I shouldn't expect TPMS to work as expected while airing up:

• It worked as good as expected in my last JLUR.
• It works in all of the Epic Kraken videos that I've watched. Their business model for that device depends on TPMS working.
• It worked in this rig for a few months.
• In MY '21 Jeep introduced an enhancement of TPMS as a way of remotely telling you that your tires were at the right pressure while airing up.

 

[J0E]

If all four tires are connected then wouldn't a gauge on one of the lines show zero PSI?

No, it reads the pressure in the line. That's how all the other MORRFlate and all the other 4 way systems work. They have a gauge on the manifold that's not real accurate while the pump is running.

To the naysayers suggesting that I shouldn't expect TPMS to work as expected while airing up:

• It worked as good as expected in my last JLUR.
• It works in all of the Epic Kraken videos that I've watched. Their business model for that device depends on TPMS working.
• It worked in this rig for a few months.
• In MY '21 Jeep introduced an enhancement of TPMS as a way of remotely telling you that your tires were at the right pressure while airing up.

I never said it had 100% failure, I said it was unreliable.

• It worked as good as expected in my last JLUR.

At least you thought it worked good when you tried it.

Their business model for that device depends on TPMS working.

They're not the first to have a business model on a flawed idea.

I took delivery of my JLR June 2021, so it's probably got the old TPMS.

 

[Ratbert]

No, it reads the pressure in the line. That's how all the other MORRFlate and all the other 4 way systems work. They have a gauge on the manifold that's not real accurate while the pump is running.



I never said it had 100% failure, I said it was unreliable.

• It worked as good as expected in my last JLUR.

At least you thought it worked good when you tried it.

Their business model for that device depends on TPMS working.

They're not the first to have a business model on a flawed idea.

I took delivery of my JLR June 2021, so it's probably got the old TPMS.

Ok, so I'm being unreasonable in expecting it to work as well as it did in my 2020 or in any of the other scenarios that I listed?

 

[Ratbert]

The dealership tested the TPMS and it worked as expected for them. Aired it up and down several times and it never exhibited the problems that I probably experience.

They, of course, never said anything to indicate that I shouldn't be using for airing up.

 

[J0E]

The dealership tested the TPMS and it worked as expected for them. Aired it up and down several times and it never exhibited the problems that I probably experience.

They, of course, never said anything to indicate that I shouldn't be using for airing up.

At least for me, it's sporadic and unpredictable how accurate it is when static.

After doing Fins & Things yesterday we were in the starting area of Hell's Revenge airing up. TPMS was registering everything incrementing fine, then stopped moving.

Flipped the screen to another, then back. Everything changed one time to show the latest numbers, then refused to change again. It was stuck at about 30psi.

Turned off the Jeep and back on. No change. TPMS readout wouldn't budge.

I gave up, shut off the compressor, put the air lines back in the bag, and drove off.

A short time later it finally updated, showing all tires at around 39psi.

Thoughts on what would cause it to not update and how to resolve it? It's definitely still under warranty.

That's the original post by OP.

Several folks have asserted to save power, the TPMS doesn't transmit very often unless the PSI changes 10 or more.

It doesn't seem like a problem to me, if it freezes at 30 PSI and your compressor is running, just use your best guess of how much time. You're like me, airing up over 30 PSI. I are up my 37" KM3's about 35 PSI. The only problem I see is air down and you shouldn't use 4 hoses to air down anyway. Get some J.T. Brooks Tire Deflators and set the front axle at 13 PSI and rear at 10 PSI.

 

[ppjcs]

I am not sure if theis is appropriate message here but I have the (picture attached) on my dash cluster after rotating the tires. I understand the left rear needs air but am unsure as to what the 2.4 refers?

 

[alphawolff]

I am not sure if theis is appropriate message here but I have the (picture attached) on my dash cluster after rotating the tires. I understand the left rear needs air but am unsure as to what the 2.4 refers?

2.4 bar is a measurement like PSI. you're in metric. drive it a bit and the sensor should pick up

 

[ppjcs]

Thanks that explains it. Being an older fellow (75) I was brought up with pounds/sq inch and sometimes for get that we have metric now in some places.

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