ABS RF wheel activation

[mortten]

Boy just picked up an 06 Yukon Denali. ABS and TC lights were on. Scanned it and had a RF Sensor circuit code. Found the sensor unplugged. Now it know why. Plugged it back in. No more codes. All sensors reading the same speed. When pulling away from a dead stop the RF activates. Let off the gas and then it goes fine. Sets no codes. Head scratcher.

 

[Fless]

Are you graphing all of the wheel speed sensors to compare them? Sometimes a dropout or inconsistency is more evident on a graph than simple numbers.

 

[rockola1971]

Check that RF hub for excessive play. They get wobbly and trick the ABS into thinking that wheel is skidding and boom your ABS activates.