I was fooling around with my car this morning and I was wondering where the actual tire pressure sensors are located. At first I thought I wouldn't have them since I have aftermarket wheels, but the in-cabin monitor still reads out the pressures. Thanks!
Tire Pressure Monitoring System (TPMS) - Design, Function, Operation, and Troubleshooting [Photos re-hosted]
mkell
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Probably. What's the model number on it?
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If you can get it cheaply or free, you can give it a try.
Here are some modules on eBay. They aren't the cheapest, but they show the labels:
Here's a Bentley (Phaeton) module on eBay:
http://www.ebay.com/itm/Bentley-Tir...it-Part-3D0907273G-/272062589458?hash=item3f5831aa12:g:0O4AAOSwbdpWXbZm&vxp=mtr
Notice it says "to be used in conjunction with transmitter TSSRE.."
Here's a Touareg module on eBay:
EDIT: That one is sold and the pictures are gone. Here's another:
https://www.ebay.com/itm/NEW-Genuin...7-273H-7L0-907-273H/331908010893?hash=item4d4742538d:g:RK0AAOSwAPlXhrJG&vxp=mtr
Notice it says "to be used in conjunction with transmitter RDKS/RE"
They both say they are RDKS/SG.
If the Touareg one works, that would be great.
Why do you suspect the TPMS module?
-Eric
Yes Chris, that's the one.
The idea was to buy a sensor that the battery can be replaced on.
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It's simple enough to check, access is easy, just plug it in and see.
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So, are you saying that you think this is a Touareg module and it was in your Phaeton when you bought it? And now you want to know if that's why your TPMS doesn't work?
See post # 273 of this thread.
Did you inflate all tires to the pressures on the door card? Inflate the spare to the same pressure as the back tires.
Try that first and hit "New spec. pressures" then hit "Confirm" and drive it until it says it's OK or faults out.
-Eric
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Playing Whack-a-Mole with TPMS
My new-to-me Phaeton had a dead LCD panel in the instrument cluster when I bought it. The moment I had it repaired and plugged it back in, there were lots of new warning lights to marvel at and challenges to fill my Saturdays for many months to come.
One of them is the TMPS warning light. As all the tire pressures were fine, I was focusing on the other more urgent lights. However, Saturday morning I came down to a "Flat Tyre!" warning on the dash. The right rear tire was low, so I took it off to check for a leak. (I just had four brand new tires installed less than a month ago.) In my leak investigation I found a small hairline crack in the rim that I plan to have repaired locally.
What I also noticed was that this was the only tire with a rubber valve stem, leading me to suspect this is the cause of my warning light. (By the way VCDS had a stored code for TPMS Control Module Fault that I suspect was related to the previous owner letting the left battery discharge. After clearing it a couple times, it has not come back.) I tried to reset the pressures but the panel says "learning" but never seems to learn very much. Also I am wondering how the system knew I had a flat tyre when the tyre that was flat had a rubber valve stem and presumably no TPMS sensor, but anyway...
I followed the Ross-Tech Wiki procedure of letting 10-12 psi out of each tire quickly to "wake up" the sensors. I guess they all woke up because VCDS Measuring Blocks 004, 007, 010, and 013 all registered the correct (low) pressure of 1.80 bar (25 psi). Measuring Block 001, which I assume was for the left rear with the rubber stem, said something like "Not Available". When I pumped them back up to 40 psi, 4 of the 5 registered (correctly) between 2.80 and 2.83 bar. (Again measuring Block 001 was not available.)
As I scanned through, the measuring blocks with the next higher number to the pressure/temperature readings (that is 005, 008, 011, and 014) read "0 months". Is that telling me that the batteries for these four sensors are at the end of or past their useful lives?
Several questions:
1. I found a set of 4 aftermarket (Mobiletron) TPMS sensors for just under $100. Should I replace just the one on the wheel that I will be having repaired and let the others go for now as they seem to be sending a signal? Replacing the other 3 would obviously involve the expense of removing and then remounting/rebalancing the brand new tires. (I don't care about the spare and I believe I can disable it through VCDS.)
2. I read a couple posts about using VCDS to convert from a "direct" system which this one is, to an "indirect" system that uses wheel speed and wheel speed differential to detect decreasing tire pressure. Is that possible (and fairly simple) to do and would you recommend it? If not, why not?
Looking for advice on the next step. Thanks in advance.
Paul
My new-to-me Phaeton had a dead LCD panel in the instrument cluster when I bought it. The moment I had it repaired and plugged it back in, there were lots of new warning lights to marvel at and challenges to fill my Saturdays for many months to come.
One of them is the TMPS warning light. As all the tire pressures were fine, I was focusing on the other more urgent lights. However, Saturday morning I came down to a "Flat Tyre!" warning on the dash. The right rear tire was low, so I took it off to check for a leak. (I just had four brand new tires installed less than a month ago.) In my leak investigation I found a small hairline crack in the rim that I plan to have repaired locally.
What I also noticed was that this was the only tire with a rubber valve stem, leading me to suspect this is the cause of my warning light. (By the way VCDS had a stored code for TPMS Control Module Fault that I suspect was related to the previous owner letting the left battery discharge. After clearing it a couple times, it has not come back.) I tried to reset the pressures but the panel says "learning" but never seems to learn very much. Also I am wondering how the system knew I had a flat tyre when the tyre that was flat had a rubber valve stem and presumably no TPMS sensor, but anyway...
I followed the Ross-Tech Wiki procedure of letting 10-12 psi out of each tire quickly to "wake up" the sensors. I guess they all woke up because VCDS Measuring Blocks 004, 007, 010, and 013 all registered the correct (low) pressure of 1.80 bar (25 psi). Measuring Block 001, which I assume was for the left rear with the rubber stem, said something like "Not Available". When I pumped them back up to 40 psi, 4 of the 5 registered (correctly) between 2.80 and 2.83 bar. (Again measuring Block 001 was not available.)
As I scanned through, the measuring blocks with the next higher number to the pressure/temperature readings (that is 005, 008, 011, and 014) read "0 months". Is that telling me that the batteries for these four sensors are at the end of or past their useful lives?
Several questions:
1. I found a set of 4 aftermarket (Mobiletron) TPMS sensors for just under $100. Should I replace just the one on the wheel that I will be having repaired and let the others go for now as they seem to be sending a signal? Replacing the other 3 would obviously involve the expense of removing and then remounting/rebalancing the brand new tires. (I don't care about the spare and I believe I can disable it through VCDS.)
2. I read a couple posts about using VCDS to convert from a "direct" system which this one is, to an "indirect" system that uses wheel speed and wheel speed differential to detect decreasing tire pressure. Is that possible (and fairly simple) to do and would you recommend it? If not, why not?
Looking for advice on the next step. Thanks in advance.
Paul
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If the others are working, I'd just replace the one and do the others at the next tyre change, which, being a Phaeton, won't be long in coming! I don't know of any way to achieve your second question.
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Below are the VCDS instructions for enabling the indirect TPMS through the ABS module (03) and disabling direct TPMS through the Tire Pressure module (65). My guess is the older ABS module in the '04 Phaeton is not capable, but I may give it a try: http://www.myturbodiesel.com/wiki/tpms-activation-reset-and-disable-coding-with-vcds-mk6-vw/
Was I right that the Measuring Blocks that are showing "0 Months" are displaying the remaining battery life?
Was I right that the Measuring Blocks that are showing "0 Months" are displaying the remaining battery life?
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Yeah, I think I'll stick with the direct monitoring! I'm not sure why people have so much trouble with it, so long as the coding is right and the tyre pressures are correct, it works very well, most problems are sensor battery-related, or failure of the older controllers.
Yes, the 0 months is battery life. Not sure how accurate it is though. Evidently not that accurate since yours are still working!
Yes, the 0 months is battery life. Not sure how accurate it is though. Evidently not that accurate since yours are still working!
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I was talking about TPMS systems with my favorite VW service advisor once. He told me that newer VWs like his Jetta uses a speed ring like the ABS ring (maybe it's the same ring) to measure the rotational speed of the wheel to determine if a tire is lower than the others. There are no sensors in the wheel.
I wouldn't hack the ABS controller. The link you posted mentioned two things:
Expensive VWs like the Touareg still use direct system (at the time it was written) and he didn't think anybody converted from a direct system like ours to an indirect system.
That thread seems to be for Canadian-market cars that had the indirect TPMS system but it was "hidden" due to it not being a requirement for the Canadian market.
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