ABS Speed Sensor

[Triathlete]

Just curious, are you doing more than just simply replacing boots?
If all your doing is boots there is no need to remove the sensors.

[MSHardeman]

Bart,

I recently fubared the speed sensor on the drivers side too (or more acurately, my mechanic did) and from what I can tell these are only necessary for the ABS. I drove to Moab without the speed sensor and my speedo worked fine, but my ABS light was on. As soon as I replaced the sensor at The Stoop, the ABS light went off and the speedo still worked.

From what I gather the sensor is basically a magnet that senses the ridges of the "tone" ring as they pass by. The ABS brain then compairs the information from all four corners to make sure that the ridges are all passing by the sensors at the same rate. As soon as one wheel speeds up, or slows down, then the signal from that wheel is different and the ABS kicks in during brakeing.

What I DON'T know is if these sensors have something to do with the TOD system. How does the TOD know when one wheel is spinning faster than the others if not for the speed sensors? Anyone? Is the TOD sensing taken care of in the transfer case somehow?

[nfpgasmask]

Yeah, I need to get to the bottom of this. If all it affects is the ABS, I want it out.

Billy, I am going all the way to the diff to replace my leaking seals.

Bart

[nfpgasmask]

Just got a reply from JLEMOND on the Planet and he confirmed it. The speed sensors are only for the ABS!!! TOD is controlled elsewhere!

Bart

[Triathlete]

Billy, I am going all the way to the diff to replace my leaking seals.

Bart

Cool, just didn't want you doing a lot of extra/unecessary work.

[nfpgasmask]

Its kind of a whore of a job, but a few months back I bought a nice electric impact, lemmi tell ya, WHAT A DIFFERENCE it makes having this.

Bart