On Mon, 28 Sep 2015 08:02:58 +0100, Chris Bartram
wrote:

On 28/09/2015 07:25, Jeff Layman wrote:
On 28/09/15 01:54, wrote:
On Sunday, 27 September 2015 23:04:15 UTC+1, The Natural Philosopher
wrote:

The cheatware detects when a motor undergoes emissions testing, and then

how is that possible?

One report said that it detected the steering wasn't being used when the
car was being "driven" on a rolling road test rig to check emissions.

I have seen a suggestion that there's a "test" mode that on the surface
disables ESP etc for rolling road testing, but I've never seen any
evidence of this beyond hearsay. Even if there isn't, if it's a 2WD car,
pretty easy to tell if it is on a rolling road via the ABS sensors, and
even if 4WD, as has been suggested elsewhere in this thread, via the
steering angle sensor.

Nowadays design engineers can use miniature sensors to monitor
practically anything on a vehicle. The chips are tiny and are always
getting smaller. I should think it's a doddle to rig the system, but
what I cannot get my head around is, how on earth did VW ever think it
would get away with the scam?

MM