Tyre Pressure Monitoring

[G-rig]

All these threads don't make much sense once certain informative posts are deleted.

Bit hard to follow what's going on and people may as well start another thread.

[Treza360]

All these threads don't make much sense once certain informative posts are deleted.
Bit hard to follow what's going on and people may as well start another thread.

Yeah that's what I was trying to do. There was some useful information and debate in there though so I tried to salvage what I could.
Let's move forward.
Cheers,
Trent

[logger]

Mark6 "Sports Pack" includes Low Tyre Pressure Indicator. I assume this does similar to aftermarket systems you guys have been discussing. Is it feasible to fit this after purchase and if so how much does it cost roughly? Thnx.

Woops sorry I see this is MK5 & Jetta thread. So disregard, unless I s'pose sytems are similar.

[blutopless2]

i have found that the one on my jetta works really well. had a slow leak in one tyre which the tpms picked up.
have seen some aftermarket ones that give you a display of each tyre and the pressure and these were around the $600 mark fitted. wasnt interested as the VW one seems to work well.

[gregozedobe]

The VW TPMS on Oz MkV Golfs (and I'm guessing the Oz Mk6 is the same), monitors the speed of rotation of the wheels via the ABS sensors. If it notices one wheel is rotating significantly faster than the others then it assumes/infers the reason is that particular wheel is low on pressure (reduced rolling circumference) and sets off the alarm to notify the driver.

This method isn't as quick to detect a leak as the TPMS's that have direct pressure monitors in each tyre, and can't tell you what the pressure is in each tyre, only if it is noticeably different after driving for a bit. Some people find they are quite sensitive, others aren't so impressed.

I'm hoping to have mine (Orange TPMS P409S with in-tyre sensors) installed for an all-up cost of around $330 ($175 purchase & delivery, $80 to install sensors in the wheels, and $75 to wire up the monitor to switched power in the dash).

[Transporter]

I'm hoping to have mine (Orange TPMS P409S with in-tyre sensors) installed for an all-up cost of around $330 ($175 purchase & delivery, $80 to install sensors in the wheels, and $75 to wire up the monitor to switched power in the dash).

That is a bargain.
Could you tell us where from?

[logger]

The VW TPMS on Oz MkV Golfs (and I'm guessing the Oz Mk6 is the same), monitors the speed of rotation of the wheels via the ABS sensors. If it notices one wheel is rotating significantly faster than the others then it assumes/infers the reason is that particular wheel is low on pressure (reduced rolling circumference) and sets off the alarm to notify the driver.

Thanks heaps for the explanation. This system probably would not have saved my tyre on the weekend but might have saved my alloy. Car was parked overnight on a steep slope. Rear Left tyre went totally flat overnight with roofing nail in it. I drove about 5km @ 40kmh on gravel roads without noticing it and buckled the alloy in the process.

Wonder what sort of pressure differential is required to create enough rpm diff to trigger the system. Also begs the questions:
1) if the ABS hardware is already in place why VW do not activate it on all Golfs and only the ones with the Sports Pack? S'pose it might need the larger 17" wheels and lower profile tyres fitted to work reliably.
2) Can I get this system activated on my car? (It obviously has merit and if it has enough sensitivity it may have alerted me prior to the tyre going flat overnight.)

A system like you are getting is obviously the best way to go. With direct pressure monitoring it would almost certainly have saved my tyre & alloy as I would not have driven on it and stuffed it in the first place.

[Arctra]

Thanks heaps for the explanation. This system probably would not have saved my tyre on the weekend but might have saved my alloy. Car was parked overnight on a steep slope. Rear Left tyre went totally flat overnight with roofing nail in it. I drove about 5km @ 40kmh on gravel roads without noticing it and buckled the alloy in the process.

Wonder what sort of pressure differential is required to create enough rpm diff to trigger the system. Also begs the questions:
1) if the ABS hardware is already in place why VW do not activate it on all Golfs and only the ones with the Sports Pack? S'pose it might need the larger 17" wheels and lower profile tyres fitted to work reliably.
2) Can I get this system activated on my car? (It obviously has merit and if it has enough sensitivity it may have alerted me prior to the tyre going flat overnight.)

A system like you are getting is obviously the best way to go. With direct pressure monitoring it would almost certainly have saved my tyre & alloy as I would not have driven on it and stuffed it in the first place.

I got the ABS based TPMS system on my Tig as part of the Off-road pack. I have 16" wheels with 215/60 profile tyres on it and need about 6psi difference for the system to alert me. I recall someone else in the Tig section has 17" rims with lower profile tyres and it required less PSI difference to be alerted, so I ssypect the lower profile your tyre the more sensitive the ABS based system is. I cannot say for certain that that is the case though.

Although the ABS based TPMS is a nice safety-net device to prevent tyre/wheel damage, I think I'd prefer an in-tyre solution. It's more accurate and sensitive, and it takes the chore of checking each wheel individually when I refuel a lot easier, so I'm more likely to keep my tyre pressures in check and prolong the life of my tyres. That's just my 2c worth though. I'm watching this thread closely for suggested solutions and prices. When it comes time to change my tyres I'll probably get the in-tyre solution installed at the same time.

[blutopless2]

Wonder what sort of pressure differential is required to create enough rpm diff to trigger the system.

have found mine in an 08 jetta tsi running 18" wheels/tyres operates at about 3-4 psi differential.

if the ABS hardware is already in place why VW do not activate it on all Golfs and only the ones with the Sports Pack? S'pose it might need the larger 17" wheels and lower profile tyres fitted to work reliably.

dont think the size of wheels will matter as the overall diameter of the tyre will be almost the same... ie going from 17" to 18" you compensate by lowering the 18" tyre profile in order to keep your speedo accurate.
can't say why they dont have it on some models... probably want you to upgrade and pay for it together with some other options.

[Maverick]

Thanks heaps for the explanation. This system probably would not have saved my tyre on the weekend but might have saved my alloy. Car was parked overnight on a steep slope. Rear Left tyre went totally flat overnight with roofing nail in it. I drove about 5km @ 40kmh on gravel roads without noticing it and buckled the alloy in the process.

Wonder what sort of pressure differential is required to create enough rpm diff to trigger the system. Also begs the questions:
1) if the ABS hardware is already in place why VW do not activate it on all Golfs and only the ones with the Sports Pack? S'pose it might need the larger 17" wheels and lower profile tyres fitted to work reliably.
2) Can I get this system activated on my car? (It obviously has merit and if it has enough sensitivity it may have alerted me prior to the tyre going flat overnight.)

You can retrofit this to cars with ESP as long as the controller is a recent one - generally mid MY07 onwards. I have a how to guide that I haven't finished that I can post if required (need to finish it first).

It's not fitted to all cars for marketing reasons.

And it's less accurate with the lower profile tyres because they have smaller sidewalls so the rolling diameter doesn't change as fast as it does with tyres with a higher profile.

I have some info on how it works here but allow around 25-30% change in pressure and up to 10km for the loss to be detected.

Fitting a direct TPMS

http://www.my-gti.com/747/fitting-a-direct-tyre-pressure-management-system-tpms

Volkswagen Tyre Pressure Monitoring System (TPMS)

http://www.my-gti.com/321/volkswagen-tyre-pressure-monitoring-system-tpms

[Maverick]

The VW TPMS on Oz MkV Golfs (and I'm guessing the Oz Mk6 is the same), monitors the speed of rotation of the wheels via the ABS sensors. If it notices one wheel is rotating significantly faster than the others then it assumes/infers the reason is that particular wheel is low on pressure (reduced rolling circumference) and sets off the alarm to notify the driver.

This method isn't as quick to detect a leak as the TPMS's that have direct pressure monitors in each tyre, and can't tell you what the pressure is in each tyre, only if it is noticeably different after driving for a bit. Some people find they are quite sensitive, others aren't so impressed.

I'm hoping to have mine (Orange TPMS P409S with in-tyre sensors) installed for an all-up cost of around $330 ($175 purchase & delivery, $80 to install sensors in the wheels, and $75 to wire up the monitor to switched power in the dash).

With the wiring of the TPMS you might want to consider wiring it up differently to the standard way. There are two power wires that you can connect, by default they are both connected to the same switch power in the cigarette lighter socket.

The alternative method is to wire one to unswitched power so the unit it on all the time and the other one to switched power to enable the display and alarm. Otherwise it can take up to 40 seconds for the display to activate when you turn it on whilst it waits to receive the status of the tyres at their next transmission time (ie one will arrive 5 seconds after you turn the car on, another at 20, one at 30 and the next at 39) and you could drive off with a flat tyre (of course it doesn't hurt to take a look before you get in).

You can see in my install here what I mean about the wires

http://www.my-gti.com/747/fitting-a-direct-tyre-pressure-management-system-tpms

I'll finish the install guide soon on the tpms, I wired it to new fuse locations in the dash. This is a fun job and requires pulling chunks of the dash out. When I post the how to guide for the new circuits you'll see what I mean!

[gregozedobe]

That is a bargain.
Could you tell us where from?

Can and will, but I'd rather wait to see if the pair I've ordered arrive and are OK before I give any specific recommendations (so if I get ripped off I can save anyone else from the same fate).

If you're impatient and want to look for yourself anyway - hints: eBay, Orange TPMS, UK seller, Buy-it-now, and he's charging me GBP 11.00 per kit for P&P.

[gregozedobe]

With the wiring of the TPMS you might want to consider wiring it up differently to the standard way. There are two power wires that you can connect, by default they are both connected to the same switch power in the cigarette lighter socket.

The alternative method is to wire one to unswitched power so the unit it on all the time and the other one to switched power to enable the display and alarm. Otherwise it can take up to 40 seconds for the display to activate when you turn it on whilst it waits to receive the status of the tyres at their next transmission time (ie one will arrive 5 seconds after you turn the car on, another at 20, one at 30 and the next at 39) and you could drive off with a flat tyre (of course it doesn't hurt to take a look before you get in).

You can see in my install here what I mean about the wires

http://www.my-gti.com/747/fitting-a-direct-tyre-pressure-management-system-tpms

I'll finish the install guide soon on the tpms, I wired it to new fuse locations in the dash. This is a fun job and requires pulling chunks of the dash out. When I post the how to guide for the new circuits you'll see what I mean!

Mav, thanks very much for that useful info. I'll go and look at your install guide when I get a chance (soon).

If I understand what you are saying the monitor can be left in a kind of "stand-by" mode (unswitched power ie all the time) so it is receiving and updating the pressure and temperature info all the time, but not displaying it (presumably to reduce current draw when the engine isn't running), then when you switch the engine on the switched power supply "wakes up" the monitor and alarm and it starts to display the current presure immediately (rather than wait 40 seconds or so).

Do you have any figures on the "stand-by" mode current draw ( I can't read the TPMS manual, as it hasn't arrived yet (my Transporter in particular can sit for 2-3 weeks between drives sometimes , and I don't want to flatten the battery, so I might need to put a manual switch in that circuit).

[logger]

You can retrofit this to cars with ESP as long as the controller is a recent one - generally mid MY07 onwards. I have a how to guide that I haven't finished that I can post if required (need to finish it first).

Look forward to your How to guide on the retrofit. I am fairly pretty keen to do it, if it is inexpensive. (Are we talking a couple of $100 here?) Whilst not the best system it still seems beneficial and the integration appeals to me over the better after market direct system.

[85turbo]

to retrofit the OEM style TPMS to the golf will cost about $100 au for the parts, and a little of your time.

harness

&

Button


the above are the parts required.

Jason.