VDLC will kick in even with VDC turned off when there is huge wheel spin differentials left to right. It can be disabled by disconnecting the module under the ebrake cover or by doing a lot of donuts, or jacking up a rear corner so that it spins freely while you rev it gently in 2nd or 3rd gear. At that point the slip light will come on and stay on indicating that the VDLC system has "given up". Restarting the car resets it.
It will blink at me occasionally on my first auto-x run on cold race tires but it is not enough to bother me so I leave it alone.
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