Quote:
Originally Posted by Ninjin
I've noticed this behavior on uneven surfaces as well. My theory is that the stability control (specifically the use of individual corner braking to prevent the car from spinning) and traction control (specifically the metering of power + brakes to prevent wheelspin) are indeed fully OFF. However there are at least three features I know of that won't be turned off by depressing the trac off button until the two lights come on.
1. What I think you're seeing is the "auto-LSD" feature. Because the torsen LSD will become an open diff if one wheel is completely in the air; the car is programmed to apply the brake to a rear wheel if it senses that wheel is not touching the ground, or about to break traction. This is pretty easy to achieve with certain suspension setups or uneven surfaces. This feature activating is probably what is causing the "slip light" on the dash to flash at you in corners. This feature is disabled with the pedal dance diagnostics mode.
2. ABS - As far as I know you'd have to pull a fuse to disable ABS. ABS activation shouldn't trigger the "slip light".
3. EBD - Electronic brakeforce distribution. As with ABS, I don't think this feature triggers the slip light at all, and it can be disabled with the pedal dance diagnostics mode, but doing so can have negative consequences (since the ABS system is programmed to rely on the presence of EBD).
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The last few times I've gotten the slip light it's felt like the throttle was being electronically modulated. I assume if the electronic LSD function took over that you'd still get power delivery to the outside wheel (since the braking would cause the diff to lock up again?), so you wouldn't get the sensation of throttle input being ignored?