1999 XJR

I have an intermittent ASC warning light that comes on anytime that I go over a bump or hit a slick patch of road. I cleaned all four wheel sensors and i am still experiencing this problem. What is the next course of action for diagnosing the fault?

 

The ASC is SUPPOSED to activate under those circumstances.
When different wheels spin/slip at different speeds, the ABS/ASC intervenes to correct the situation.

PRESS THE TRAC OFF button if you want to eliminate the warning. (and intervention)

ETA................RTFM