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Old 05-07-2014, 02:07 PM   #1
papaacer
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ABS Light is on and Speedo is not working

Okay guys and gals, I need some help here. My abs light is on and speedo is not working. I have a 2012 SE with the Non-Selectshift DCT. A little background:
I hit a curb on my front left side and screwed up my suspension. I had to replace the following: LH front strut, knuckle, wheel bearing, cv axle, and sway end link. I used the same abs wheel sensor. I did leave it connected to the connector which was left on the car. It has been a day and the light abs stays on and my spedo goes up to 5mph and the just drops and doesn't go up again. But I plug in my ELM237 and it reads speed just fine as does the cruise control. Any ideas? Thanks


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Old 05-07-2014, 02:11 PM   #2
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Did you try using FORscan to see if there are any DTC's?
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Old 05-07-2014, 02:12 PM   #3
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Did you try using FORscan to see if there are any DTC's?
Didnt even know that existed haha
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Old 05-07-2014, 02:32 PM   #4
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There's a remote possibility that the impact that required all the new parts actually damaged the old sensor somehow.
Perhaps it's reading a speed mismatch between the wheels?
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Old 05-07-2014, 02:34 PM   #5
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There's a remote possibility that the impact that required all the new parts actually damaged the old sensor somehow.
Perhaps it's reading a speed mismatch between the wheels?
Wierd thing is, after the impact, i drove to my gfs to leave it there (different town) and it was reading perfectly fine
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Old 05-08-2014, 08:01 AM   #6
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Wierd thing is, after the impact, i drove to my gfs to leave it there (different town) and it was reading perfectly fine
Still sounds like the wheel sensor for the ABS to me.
Perhaps the wire is broken (kinked, pinched, etc) or the connector isn't making a good connection any more.
Maybe the sensor itself is now faulty
I'm not sure if it's a Hall effect or reed switch (for measuring pulses i.e. one pulse per rotation) or if it's an optical encoder (they can get dirty), or if it's some type of generator-style tach (voltage => speed)...

There's a lot of weird stuff that could be happening there. I think the wheel sensor is where you should begin your investigation.
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Old 05-08-2014, 11:41 AM   #7
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I think thats where i will start. They a cheaper than all the other options
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