Thread: Error Code U102B
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07-30-2020, 12:31 PM #1
Error Code U102B
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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07-30-2020, 01:28 PM #2
Re: Error Code U102B
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"Never look down on anybody unless you're helping him up" - Jesse Jackson
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07-30-2020, 02:23 PM Thread Starter #3
Re: Error Code U102B
It’s a 2010 Jeep Wrangler Jk
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07-31-2020, 12:34 PM #4
Re: Error Code U102B
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.
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07-31-2020, 03:16 PM Thread Starter #5
Re: Error Code U102B
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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07-31-2020, 03:31 PM Thread Starter #6
Re: Error Code U102B
Actually my bad it is a C code! I wrote it wrong. I have the code C102B
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07-31-2020, 06:28 PM #7
Re: Error Code U102B
OK that code C102B makes sense...
Give me some time - access to info is S L O W at night...
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07-31-2020, 06:54 PM #8
Re: Error Code U102B
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.
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08-01-2020, 03:51 PM Thread Starter #9
Re: Error Code U102B
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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08-01-2020, 04:37 PM Thread Starter #10
Re: Error Code U102B
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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08-01-2020, 10:45 PM #11
Error Code U102B
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"Never look down on anybody unless you're helping him up" - Jesse Jackson
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08-02-2020, 09:18 PM Thread Starter #12
Re: Error Code U102B
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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08-02-2020, 11:27 PM #13
Re: Error Code U102B
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"Never look down on anybody unless you're helping him up" - Jesse Jackson
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08-03-2020, 09:19 AM Thread Starter #14
Re: Error Code U102B
So check the actual sensor not the wire with ohms?
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08-06-2020, 08:47 PM Thread Starter #15
Re: Error Code U102B
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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08-07-2020, 12:20 AM #16
Re: Error Code U102B
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"Never look down on anybody unless you're helping him up" - Jesse Jackson
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08-07-2020, 09:10 PM Thread Starter #17
Re: Error Code U102B
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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08-07-2020, 10:21 PM #18
Error Code U102B
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 JacksonLast edited by JPNinPA; 08-07-2020 at 10:45 PM.
"Never look down on anybody unless you're helping him up" - Jesse Jackson
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08-15-2020, 01:30 AM Thread Starter #19
Re: Error Code U102B
I replaced the new sensor. The one I purchased was faulty and now my issue is finally resolved!
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