Error Code U102B

[JaredHB]

I am having a trouble with my rear wheel speed sensor. I’ve had my EBS, Traction Control, and ESP BAS lights on for awhile so I replaced my sensor and cleared my computer but still am getting the lights with the U102B code still coming up. The sensor fixed 3 other codes but won’t get rid of this one does anyone know a fix or possible cause?


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[JPNinPA]

What year, make, model???
Otherwise you het generic answers that may be wrong.



Never look down on anyone unless you are helping them up - Jesse Jackson

[JaredHB]

It’s a 2010 Jeep Wrangler Jk


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[User Namespec25440@mypack]

Are you SURE that is a U code ?
Speed sensors are 'C' series codes. AND C102B is Right Rear Wheel Speed Sensor Circuit.

TIP - If I am correct about # note key word is CIRCUIT. expensive lesson.

[JaredHB]

Yeah I had 2 C codes before and fixed it with the sensor and now I have the U code remaining. Do you know the fixes for a U code?


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[JaredHB]

Actually my bad it is a C code! I wrote it wrong. I have the code C102B


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[User Namespec25440@mypack]

OK that code C102B makes sense...

Give me some time - access to info is S L O W at night...

[User Namespec25440@mypack]

2010 Jeep Wrangler Jk

using a test light or a DVOM -

Is there @10V terminal 1 ? should be @ battery voltage
Is terminall 2 grounded ? you could probe terminal1 to terminal2

these are mst likely I expect no V at #1 - let me know as we go to next wiring ck.

[JaredHB]

I am going to do the test but honestly never had to use my multimeter for stuff like this before. What settings do I set it to to test the voltage? I have a analog meter


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[JaredHB]

I figured out how to test it with my multimeter and it is reading same voltage as my battery. But as far as terminal 2 being grounded I didn’t know what you meant by that. I put + in terminal 1 and - in terminal 2 and got the same reading as my battery


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[JPNinPA]

Touch the black lead to the frame or a bare metal area. Then touch the red to the terminal you are testing. 0 zero volts is ground.


Regards,
JPNinPA

Never look down on anybody unless you're helping them up. -Jesse Jackson

[JaredHB]

Yeah its grounded. Wires seem good and reading good Volts what else could it be? Could the sensor I purchased be faulty?


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[JPNinPA]

Change the DMM to read K ohms. Touch one lead to each prong of the ABS sensor. Should be 2-5K ohms.


Regards,
JPNinPA

Never look down on anybody unless you're helping them up. -Jesse Jackson

[JaredHB]

So check the actual sensor not the wire with ohms?


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[JaredHB]

So I checked the ohms but not sure if I did it right.(I’m not good with electrical at all). I set it to 10 ohms max on my multimeter and connected each probe to each pin sticking out of the actual sensor and read 0 ohms just want to make sure before I call quadratec and ask for a replacement


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[JPNinPA]

So it turns out I was wrong about jk speed sensor resistance. It will read zero volts. It will vary the current between 7 and 14 MA as the wheel turns and the sensor has 12v across it.

A ODBII scanner can display the currents.

Have you reset the codes via a ODBII code reader? My Honda had issues with speed sensors and each time I changed it I drove over to OReilly's and used their reader to reset the codes.


Regards,
JPNinPA

Never look down on anybody unless you're helping them up. -Jesse Jackson

[JaredHB]

Yeah I have a Flashpack Superchip reader and cleared all my DTCs and it’s the only code still popping up


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[JPNinPA]

Have you cleaned or inspected the tone ring?


Debris or a crack in this will cause issues. Also be sure the sensor is fully inserted with the correct gap .


Regards,
JPNinPA

Never look down on anybody unless you're helping them up. -Jesse Jackson

[JaredHB]

I replaced the new sensor. The one I purchased was faulty and now my issue is finally resolved!


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