so, i was out for a bit of spirited driving earlier on a local twisty road.
at one point, the car was probably a bit off the road. as it came down , the tires screeched, DSC kicked in and the quick left was accomplished.
about 30 seconds later, the "tire defect" warning chimed and i immediatley stopped to check the tires. nothing punctured and no loss of pressure.
of course, i returned to "easy" driving for the rest of the route, stopping occasionally to check pressure.
as of now - some 8 hours later, there still is no loss in pressure, and as far as i can tell, no punctures. (i'm going to get it up on a lift tomorrow to really check all four wheels)
has anyone else experienced this, or any "false" warnings with the tire defect?
Just came back from the dealer 5 minutes ago to get my "tire defect" signal re-calibrated. I had one of the rims changed (I scraped it and had to buy a new one ).
There is a button located to the right of the steering column (below) that needs to be pushed while you are driving to re-calibrate the wheels (as long as there is nothing wrong with them).
Good luck.
Lisa
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2006 E60 M5 Black on Black at dealer in 7 days!
The system checks for changes in tire pressure by measuring the revolution of the wheels while drivng in a straight line and comparing the measurements across the 4 wheels. If one wheel loses pressure, the wheel diameter get smaller (can you see it? The center of the wheel is closer to the road, hence smaller radius). When one of the wheels starts spinning a bit faster then the others (and relative to the value stored in the system's memory), the system assumes that the tire spinning faster is low on air.
When you went air born, the wheels lost contact of the road, and spun in different speeds while in air, and hence the warning message...
How do I know this? "I have a friend with a '02 titanium silver" and he sometimes drives very fast on the 280, and just before the 92 interchange, there are some bumps in the road, which make my... errr.. his car go air born.. and I get the warning...
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Arie
Remember, with an automatic transmission, Shift Happens....
'01 M5 - Titanium Silver/Siilverstone/Aluminum trim
- PDC
- Split seats
- deleted spoiler
- M Audio
- 8000 phone
- Voice Reco
- TV tuner
When was the last time you calibrated your wheel pressure sensor (using the button on the dash)? If all four tires are significantly below the pressure at which the system was last calibrated, even if all four are the same, you'll get a defect warning.
I'd been experimenting with different tire pressures over a period of several months and was at the point where the pressures were probably about 8-10 psi below the last calibration point. I got a tire defect warning. Adding air to all four tires eliminated the warning. Lowering the pressure again brought it back. Recalibration, using the dash button, eliminated the warning.
By the way, the system is recalibrated with the key in the number 2 position but the motor not running -- not while driving.
the tires still seem to be in good shape, so i think arie's explanation of the cause might be spot-on.
i check the pressure rather frequently, recalibrating the system if i fill any tire more than 4-5psi.
as for me, i'll be a bit more selective in my use of throttle, especially around some of the muir woods/stinson beach roads.
i will, tho, check out the rims to make sure they are in good shape, aside from some of the parking rash and whatnot that has "appeared" over the past two years.
Just a slip of the tongue I’m sure. I have a friend that has done the same thing. I was ... I mean he, was still shaken up by the time I ... I mean he, had reached Mill Valley, 45 minuets later. I wont do... I mean he said he wouldn't do that again
strange tire defect warning
).
and he sometimes drives very fast on the 280, and just before the 92 interchange, there are some bumps in the road, which make my... errr.. his car go air born.. and I get the warning...
Linear Mode
