TPMS puzzling behaviour.

[Skyliner33]

Hitting a bump, a bit of wheelspin or getting some air can trigger it.

Good thoughts, but it definitely isn’t any of those reasons.

 

[Bigsidavies]

So here’s a crazy idea.
Does the indirect tpms ‘add up’ the rotational differences over time until a differential is reached and then ping a fault?
Coz my crazy thought is that if it’s sensitive enough and works as I suggest could it be that the NSF always goes the longer distance around roundabouts. If you regularly do lots of roundabouts then the NSF will look to have travelled further which obviously indicates a loss of pressure.

 

[Camper_Chris]

So here’s a crazy idea.
Does the indirect tpms ‘add up’ the rotational differences over time until a differential is reached and then ping a fault?
Coz my crazy thought is that if it’s sensitive enough and works as I suggest could it be that the NSF always goes the longer distance around roundabouts. If you regularly do lots of roundabouts then the NSF will look to have travelled further which obviously indicates a loss of pressure.

I suspect it does, as i said in my previous post it would trip at 150mls due to one tyre being more worn than the other. Since sorting out the issue I've been free of nuance warnings for 3000mls. On the VW Touran I had the indirect TPMS was very reliable and would flag a warning when the pressure dropped by around 20%.

 

[Skyliner33]

So here’s a crazy idea.
Does the indirect tpms ‘add up’ the rotational differences over time until a differential is reached and then ping a fault?
Coz my crazy thought is that if it’s sensitive enough and works as I suggest could it be that the NSF always goes the longer distance around roundabouts. If you regularly do lots of roundabouts then the NSF will look to have travelled further which obviously indicates a loss of pressure.

I really doubt that is the way if functions. There wouldn't be much point to it. For example, a puncture on the motorway tyre drops some psi but the TPMS wouldnt warn you for 150 miles (as mentioned above), by then the tyre would be ruined even if it didn't have a complete blow out.

 

[Dundee_Kev]

Have you got a slightly binding brake on the offside front?? That could cause heat to travel through to the tyre making that tyre expand due to increasing pressure, then the abs sees the nearside front travelling faster to keep up.

Double check you have matching tyre sizes on the front.

Either that or you drive on full right hand lock everywhere!

 

[Alster]

Mines had new front tyres and brakes and still does it!

 

[Skyliner33]

Have you got a slightly binding brake on the offside front?? That could cause heat to travel through to the tyre making that tyre expand due to increasing pressure, then the abs sees the nearside front travelling faster to keep up.

Double check you have matching tyre sizes on the front.

Either that or you drive on full right hand lock everywhere!

No binding brake.

Tyres swapped round and wheels refurbed and brand new tyres all round. Made no difference.