Question about 2009 Volvo S40
Cuts in and out when slippery
Automatic Traction Control, or any TC system that relies on looking at individual wheel speed, will always do this. If all four wheels are spinning at the same speed (with allowances for turning), it will shut off. If some wheels start spinning faster than others, it will reduce power to the faster wheels and increase power to the slower wheels with the assumption that the slow ones are gripping well and the fast ones are spinning freely. It takes several revolutions of the wheels, and sometimes more than a second for these decisions to be made.
Posted on Mar 28, 2014
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Posted on Jan 02, 2017
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