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.
ABS RF wheel activation
- Thread starter mortten
- Start date
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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
Full Access Member
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.
I graphed them. Didn’t notice a drop out but wasn’t looking that hard at that point. Looks like the hub was replaced recently. It’s tight and no rust on the hub face. I pulled the sensor. Wasn’t rust jacked. There’s a turn cv boot so I have to pull the axle. I’ll clean up the tone ring and go from there. Doesn’t appear to be a factor sensor.
Joseph Garcia
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You can clean the redactor within the hub by using a Q-Tip with brake cleaner, while rotating the hub. Sometime something gets in there and interferes with the sensor/redactor operation.
Tonyrodz
Resident Resident
Just a little FYI--I've found out that you need to use the correct abs wheel sensors that come with the hubs. In other words--you can't use an Timken hub with a GM wheel sensors. It'll plug in but it doesn't work. Unfortunately you can't mix and match if you're trying to troubleshoot. I don't know what that is.
