Scirocco Central

Both VW website and the 2012MY brochure state that GT models have the flat tyre indicator as standard (brochure actually says all models have it) My new 2012MY GT has the yellow symbol in the display, visible momentarily when starting the engine, but there appears to be no reset button anywhere in the car or via the MFD!! Anyone have any ideas? Will the indicator still come on to indicate a flat if there is no reset button? If so how is it reset? Is there maybe a new reset system such as automatic reset with ignition switch on?

Take it you've looked in the glove box on the side wall, on the centre console side behind the drop down front cover?

C.

Thanks RW1, it is hidden away in the top of the glove compartment! Guess I just assumed it would be in a more convenient position, such as in the bank of switches in the centre with the ACC & DTC buttons! Thanks again!

Thats where TPMS switch used to be when fiited as a customer/model option on MY2009/MY2010 models.

The switch is out of the way on later Scirocco's as its not a switch to regularly use as you feel adhoc. There are implications of "just pressing it" at random other than a new tyre fitted, puncture repair, cancel previous system detection stored data or changing tyre inflatiion more tham about 2 - 3psi.

The TPMS systems when I tested it after installing it electronically without wiring (didn't order the option on mine when it was a selectable option), takes driven distance to set up to full sensing capability. That distance can be as little as 60 miles when TPMS is reset prior to a 1hr/60 mile drive but much longer distance in urban driving at 15 - 40mph. It can be as much as 1,000 miles or more before it becomes calibrated and sensitive to small tyre pressure changes. If the Scirocco is driven initially in urban traffic for a short distance then driven at speed later, this does not shorten the distance travelled to 60 miles to acheive full calibration.

In one case tested, after 1,000 miles it hadn't fully calibrated so its detection was not 100% finely tuned, see here I doubt in that case, TPMS would have ever acheived calibration looking at the TPMS stored parameters with VCDS. That "reset" initially started with urban traffic speeds of 15 - 25mph for short trip distances whose overall distance was 60 miles.

There is no visual indication when calibration happens or fails to be acheived. The only way is to look at the Measuring Block stored data in the Brakes ABS controller.

So not a control that would be pressed every day/week. More reset the system and forget, unless the system needs to calibrate a revised tyre/wheel fitting or significant tyre inflation/deflation during maintenance checks.

C.

Thanks for the info, very interesting to know those details. I have/would only ever reset following tyre changes or substantial pressure changes. My new Roc was supplied with one tyre at -4 psi which seemed odd, but on inspection it looks fine so a PDI error I suspect! I believe the system on the Roc is similar to my old BMW and simply detects a change in rolling resistance and therefore will only detect a fairly material drop in pressure.

nozydog wrote:simply detects a change in rolling resistance and therefore will only detect a fairly material drop in pressure.

Rolling resistance Effective tyre circumference using the ABS sensor at each wheel and comparing. And it uses the Steering Controller's Steering Angle sensor.
Yes its sizeable drop as it has to avoid false alarms due to tyre temperatures etc. and doesn't cover all situations like a fast puncture. But then you would realise a fast puncture by dragging steering.

C.