Aftermarket Speed/ABS Sensors?

RumHam26 said:

I am trying to track down my overactive VSC/TRAC and ABS by checking the wheel speed sensors. They all seemed to test ok with the multimeter, so now I'm removing them to make sure they are seating properly and not damaged from a leaking seal I don't know about.

I was unsuccessful in getting the rears out so far - didn't want to break them so I'm giving them more time with the PB blaster. I got the front left out with much difficulty. Looks good inside but looks like rust MIGHT have cause it to change position slightly. The o-ring is shot, but I found a new one that seems to fit well.

I cleaned up the sensor and the mounting surface to reinstall, and now I can't get the thing seated right. I can get the sensor in to where is seems solid and seated all around, but when I put the bolt in, it lifts out a tad. I wonder if maybe the rust lifted and bend the plastic mount a tiny bit over the years. Anyway - I'm going to keep trying to get it flush, but I may need a new sensor. And I'm not too confident I'll be able to get the others out without any damage - especially the rears.

Does anyone have experience with the cheap aftermarket speed sensors? They can be had for $20-$50/wheel vs the several hundred per wheel OEM sensors. I know used OEM ones on eBay is an option too. Any input is appreciated. Thanks!

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Bad Luck said:

Have you tried flashing your ABS module for codes?

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RumHam26 said:

I haven't, but I don't have any lights on. I suppose it's still worth a try right?

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Bad Luck said:

You should at least have a stored history code if your problem is a wheel speed sensor

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RumHam26 said:

I did the procedure to read the codes - I have a 2001. My diagnostic port seemed to have no shorting pin to remove. So I connected E1 to Tc and turn the ignition on. The ABS and cruise control lights where blinking nonstop, and the VSC/TRAC lights were blinking in patterns, which I found to be odd since everything I have read said it would be the ABS lights. The codes I got were 31, 37, and 51.

Other than testing, cleaning, and possibly replacing the sensor that I should consider?

I know to check the tone ring for oil, debris and damage as well.

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Bad Luck said:

From a 2000 FSM. It's a different brake system setup than 01-02 but I don't see them changing the codes for those two years
31- "right front speed sensor open/short"
37- "neither front speed sensor rotor missing"
51- "abs pump motor lock"
You should hear the ABS pump kick on at startup for a test cycle.

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RumHam26 said:

I am discovering that the abs codes are different that the VSC codes

From what I can tell
31 - malfunction in steering angle sensor
37 - malfunction in neutral start switch
51 - ECM system malfunction

Any ideas??

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Bad Luck said:

The rattling noise is the abs pump self check. I have no experience with the VSC system. Sorry I can't be of more help.

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