Does anyone know about the tyre pressure monitor and what happens if you fit aftermarket rims? i'm thinking about getting bigger wheels but dont want the dash lit up like an xmas tree
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I'm not too sure about that. The other day I checked my pressures at the garage. Had to top all of them up a bit. I got back into the car and as soon as I'd turned the key the pressure light was on. It had detected the change in pressures before the car had even moved.
The sensor is strapped to the inside of the rim with a metal band. ie the sensor is inside the tyre. Get new rims and you'd have to get the sensors moved.
SEATcarsdirect.co.uk
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Cheers guys i had seen somewhere that the sensor was part of the ABS system but wasn't sure Audi RS4 wheels here we come
Trident
Guest
This keeps popping up:
Here is how the system works, on the Leon:
Indirect TPMS is an addition to the wheel speed sensors used as a component of the Antilock Brake System (ABS). A decrease in tyre pressure will lead to a decrease in the wheel’s radius; this means it will rotate faster compared to the other tyres and the speed sensors detect this change.
This system has the major advantage that it is much cheaper to implement and quicker to introduce onto new vehicles, but has major disadvantages due to the fact that it cannot detect a slow and equal decrease in pressure on every tyre. The system also needs to be calibrated more frequently, which could be a difficulty for users.
There is another system - but it is too expensive to fit on most cars. This is where there is a radio transmitter fitted inside the rim, which reports pressure and temp to the cars computers.
Here is how the system works, on the Leon:
Indirect TPMS is an addition to the wheel speed sensors used as a component of the Antilock Brake System (ABS). A decrease in tyre pressure will lead to a decrease in the wheel’s radius; this means it will rotate faster compared to the other tyres and the speed sensors detect this change.
This system has the major advantage that it is much cheaper to implement and quicker to introduce onto new vehicles, but has major disadvantages due to the fact that it cannot detect a slow and equal decrease in pressure on every tyre. The system also needs to be calibrated more frequently, which could be a difficulty for users.
There is another system - but it is too expensive to fit on most cars. This is where there is a radio transmitter fitted inside the rim, which reports pressure and temp to the cars computers.
That's the system that's fitted to the Peugeot 407. Dad had a tyre on his changed a few weeks ago. The fitter showed him the sensor. Since the tyre change he keeps getting an error popping up saying that the pressures aren't being monitored. Apparently it has to go to Peugeot to be reset.
http://www.seatcupra.net/forums/showpost.php?p=1598386&postcount=19
This info was confirmed by a local stealer's service manager.
Interesting post. So basically I should only reset the sensors if something has changed on the car like put new wheels/tyres on?
The salesman told me to reset them everytime I got in the car, but I never did believe a word they told me...
New wheels or tyres or if you checked the pressures and had to fill them up a bit, etc.
i think you cannot trust that system 100% and should check the pressures after every 1000-2000 km's or so. Just to be sure.
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