evandostert Posted August 13, 2014 Report Share Posted August 13, 2014 My abs light is on. Low speed stops pedal pulsing. I am pretty sure it's a hub. I lifted truck and the hubs appear tight. How do I scan/ diagnose exactly what sensor needs replacing? Quote Link to comment Share on other sites More sharing options...
Blown 346 Posted August 13, 2014 Report Share Posted August 13, 2014 By using a stethoscope or the old screw driver trick with the truck in the air safely and in drive, wheel off. I had the same issue and thats how mine was diagnosed. Leave the center cap axle nut on while doing this so you dont get wacked by the wheel studs. Quote Link to comment Share on other sites More sharing options...
evandostert Posted August 19, 2014 Author Report Share Posted August 19, 2014 The abs started kicking in on low speed stops= wheel hub abs sensor gone. I replaced both back to working 100% Quote Link to comment Share on other sites More sharing options...
ty2185 Posted August 20, 2014 Report Share Posted August 20, 2014 To diagnosis which one is bad. A good wheel speed sensor will typically produce an AC voltage reading of 50 to 700 mV when the wheel is turning one revolution per second. Hook a volt meter set on AC to the sensor end of the connector. Spin the tire and measure the voltage. Lower than 50mV is your bad sensor. Quote Link to comment Share on other sites More sharing options...
Generalms02 Posted December 14, 2014 Report Share Posted December 14, 2014 So, I've had this same issue recently.... I replaced the wheel speed sensor already and the pedal still pulses (ABS activates) at low speeds. Could the wheel speed reluctor ring be my problem? Quote Link to comment Share on other sites More sharing options...
'99slobird Posted January 12, 2015 Report Share Posted January 12, 2015 Had this issue myself, odds are the bearing is the problem. A sensor was $50, bearing with the sensor was $110 and it only takes a few more minutes to change when you are that far into it. Quote Link to comment Share on other sites More sharing options...
fastsspr Posted January 25, 2015 Report Share Posted January 25, 2015 So, I've had this same issue recently.... I replaced the wheel speed sensor already and the pedal still pulses (ABS activates) at low speeds. Could the wheel speed reluctor ring be my problem? It can be the ABS brake module bad. Quote Link to comment Share on other sites More sharing options...
SS6.oh Posted January 26, 2015 Report Share Posted January 26, 2015 I use a scan tool. I carefully watch the wheel speeds. I look for one that consistantly reads slighty differnt than the others. Sometimes it's not consistent and you have to watch for awhile. it's hard to explain but if you watch/ read enough wheel speed data you'll start to see things that tip you off to which one is the problem. Specifically watch the data at the typical mph that the false activation is happening. You should see a slight variation in one of the sensor speeds when the false activation occurrs.... Or just before. Obviously while turning you will have differnt speeds from each wheel but you can sometimes noticed a anomaly while turning as well. Look for a sudden jump or decrease in speed . Quote Link to comment Share on other sites More sharing options...
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