Runflat Indicator RPA (8 replies)
I have recently discarded my runflats on my R56 JCW and put on new wheels and convential radials, being TOYO Proxes. The ride is still firm but much improved. The tyres are inflated at 32psi, much lower than runflats. Not unaturally, the dashboard monitor shows that the RPA system is inactive, and I have the little yellow indicator permanently illuminated. There appears no way of resetting the system, unless someone knows different. Views welcomed.
Hi Alan. How did you reset your tyre presssure mointoring system before you changed your wheels and tyres?
I thought the R56 models still used the anti-lock speed rings on the wheels to feedback the rotational speed of each wheel. As the tyre pressure increases or decreases the speed of the wheel changes as its diameter alters.
I dont think the R56 used wireless pressure sensors within each wheel so changing your wheels and tyres from runflats shouldn't make any difference to the operation or resetting of the monitoring system.
Hello Ian. Thanks for your response. When resetting the system previously I simply followed the instruction in the owners handbook i.e. repeatedly pressing the button on the indicator stalk. Doing that now results in"Reset" not displaying.
I am afraid I don't know anything about anti-lock speed rings but certainly didn't touch anything when changing over. My only thought was because the radials run at a much lower pressure than the run-flats, this must tell the system that there is a puncture so preventing it from being re-set. Would the system "remember" the previous run-flat pressure setting i.e. 38psi? Although re-reading the handbook it says that re-initialising sets the current pressure! So my basic problem seems to be not being able to reset the system.
Try resetting with engine running
Thanks but this didn't work. It is going into the local MINI dealer on Monday for service so they are going to look at it. However they say the problem is I didn't use official MINI alloys and they contain the sensors apparently! Not sure I understand this but we live and learn.
2007 onwards R56 Coopers use a special valve in the wheels which sends a radio signal to the pressure monitoring system. A quick search on the interweb turned up this helpful page.
Did you get this problem solved at the MINI dealer?
Also, I'm surprised you are running your non-runflats at a different pressure to your old runflats. As far as I know both types of tyre should be inflated to the same MINI recommend pressure as shown on the door pillar plate? The only difference between the two types of tyre is that the runflats have a much stiffer and stronger sidewall they shouldn't need a higher pressure.
Thanks very much Surf Blue - will have a look at that. Yes Ian, the local dealer advised that the dash lights for the TPA system cannot be turned off if you run non-standard wheels, and indeed will be a MOT failure! So looks like a lot of wheel changing when that is due! Thanks for your comments in connection with the tyre pressures. I will look into this.
Have now had a chance to look at the Pelican Technical Article and found it very informative. And yes, my original wheels have the solid aluminium valve, whereas of course the new ones are standard rubber kit! Doh! Pity I didn't see this article before I did what I did, as I seem to have the pain, for what now seems not much gain. I could have just swapped tyres but I quite like the gloss black Team Dynamic alloys and to have gone for some MINI standard black JCW alloys would have cost a small fortune by comparison.
I have also checked out the pressures and was given some duff gen originally. They should be inflated to 2.6 bar all round, whereas the standard runflats are 2.7 bar. I am now looking forward to comparing the ride comfort once I have increased the pressure. Thanks for the heads up on this issue Ian.