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500E ABS, RBS, ESC Wheel Sensor Reset
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Thread: 500E ABS, RBS, ESC Wheel Sensor Reset

  1. #1
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    500E ABS, RBS, ESC Wheel Sensor Reset

    I have two 500E cars a 2014 and a 2015, the 2015 has these warnings on startup,
    ABS "service antilock brake system"
    RBS "service regenerative brake system"
    ESC "service electronic stability control system"

    Get these errors in AlphaOBD with my AlfaOBD software and OBDLinkMX + reader.

    U1487 "Implausible Data Received from Regenerative Brake Controller Last test completed unsuccessfully Error present".
    C003A "Rear Right wheel speed sensor Signal invalid Last test completed unsuccessfully Error Present"

    I have diagnosed the problem as a bad rear wheel sensor.

    Purchased two ALS2298 replacement sensors and installed one on the car. I hope this is the correct sensor, please advise if not.

    Have gone back in to AlfaOBD to reset the error codes. Errors seem to clear, a re read shows all faults cleared. The warning lights do not go out, Took the car for a short drive errors still flash on dash.

    AlfaOBD on a re scan shows the errors have returned.

    I repeated all the procedures above then disconnected the 12v battery for 5 minutes and the warning lights were out for about 50 feet on the next test dirve then came right back on.

    Re scanned the car and the same errors are back. Any suggestions on next steps to clear this up, photos are attached. I bought 2 sensors just in case as they were not expensive but really don't want to change it out again unless that is the only option. My guess is i bought the wrong sensor but it is what shows as the replacement. Kind of stuck now and any help would be appreciated.

    Please help........... Thanks
    MacGyverdude
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    Senior Member PLP's Avatar
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    Somehow those errors do not like to be cleared, even if not existent...

    Mine was just fine but I tried AlfaOBD with the right adapters. Somehow it triggered REGEN, ABS, ESC (and maybe something else) errors. Alfa shows them to be cleared, but car did not agree.
    One time, using certain sequence I got them to clear.
    Most of the time - two or three days and it would go away on its own.

    Oh, the battery trick did not work.
    2014.
    Current rides: 2003 Porsche Boxster, 2019 Chevy Bolt LT, 2016 Audi Q5 Premium
    Previous rides: 2014 FIAT 500e, 2016 KIA Forte5 SX 1.6 T-GDI, A/T, 2016 FIAT 500X Trekking Plus AWD, 2015 KIA Forte5 SX 1.6 T-GDI, M/T, and many more...

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    Not exactly what i wanted to hear but i will wait an see. Not driving much right now due to Covid but hopefully it will clear. Anyone else have thoughts.

    MacGyverdude

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    I have the same issue with my 500e. I live in the Netherlands and have to import parts from the USA. I bought the ALS2298 from RockAuto.com and had my local garage install it and clear the errors. But the errors came back quickly.

    my garage suspects that the ABS pulse ring is corroded and needs replacing. Could this be the case? I cannot find it at Rockauto.com. Is it part of the rear Wheel hub?

  5. #5
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    The 500 pulse ring can't really corrode as it is part of the wheel bearing. If a wheel bearing was replaced, they could have installed it backwards. For aps like this, I usually use factory parts.

    This thread explains it better than I can.
    http://www.fiat500usaforum.com/showt...l-Speed-Sensor

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    Guido66 (06-26-2020)

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    The bearing was not replaced. I did some websearching and there is a magnet in the bearing seal. How can this possibly fail? Can it lose it’s magnetic properties?

    I also found that the bearing used in the European 500 is exactly the same, so that makes it a lot easier to replace it.

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    A lot of car mfgrs are going that route because they usually last the life of the bearing. The older types (usually last century) used cogged rings which could corrode or plug with mud. I understand some of these occasionally have problems with mud, if there is a high content of iron in the dirt, but that's unlikely for a car. I also read one guy's comment that he found brake dust (maybe had metallic pads?). I've seen it on a car that was running 1 mismatched tire, a few years back; probably not your cause. If you replace the sensor again, you might want to splurge an extra $5 for the factory unit.

    Probably not your cause, but you could verify the connects beneath the battery box aren't corroded, your battery posts are clean/tight, and have a load test on the battery.

    FCA put out a bulletin on what to check on your code, for models 500e 2013-2015. https://static.nhtsa.gov/odi/tsbs/20...76281-3639.pdf It basically recommends flashing the system with the latest software.

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    Guido66 (06-27-2020)

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    My garage thinks that my best bet is to get an original speed sensor. If I look it up on the mopar site I find: 68174026AD

    At several stores this number is only for 2018 and 2019.

    This is a very different number from the numbers I found at rockauto.com with the als2298 that I tried: 68073206AC, 68073206AD

    I’m completely confused and at a loss about which part I need.



    Last edited by Guido66; 06-27-2020 at 06:30 AM.

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    Found this on another site, I have the same problem.
    and also live in the netherlands.

    https://www.fiat500owners.com/thread....147443/page-2

    GUESS WHAT!? FIXED ! without going to stealership! - so as you saw above I was having the same crazy ABS, ESC, RBS etc etc lights and errors coming on - and I got the Konnwei and alfaOBD and was able to clear them over and over, but they'd always come back. Well, I decided to order the various adapters for it too (Amazon - cheap) like the Yellow one it calls for to look at the main computer etc, and while waiting for it to arrive I left the Konnwei plugged into the car, and the (12v) battery was dead the day I tried to start it! So, I charged it up and it then came up with a Check Elec Syst error now! I ran the tests and saw a lo batt 10v error in the log that set it off. I check the battery and Lo' and Behold! One of the cells was low on water and the plates were showing! I filled it, and all of them, and charged it up overnight, and - cross my fingers - it's fine now. All errors cleared - been driving it for 3 days, and no problems. It has been kinda hot here in AZ - with 100+ every day, and I have been remiss in checking my 12v batt waters. So there you go, but answer me this Batman - why the heck didn't Fiat put in a 12v low batt sensor and signal on the dash light in the dang thing!? I mean really! The only way to know if your 12v batt is going is that you get all sorts of crazy errors? Seems like a major design oversight by the software engr.

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    PLP (08-27-2020)

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    Quote Originally Posted by Guido66 View Post
    My garage thinks that my best bet is to get an original speed sensor. If I look it up on the mopar site I find: 68174026AD

    At several stores this number is only for 2018 and 2019.

    This is a very different number from the numbers I found at rockauto.com with the als2298 that I tried: 68073206AC, 68073206AD

    I’m completely confused and at a loss about which part I need.

    SOLVED!

    The als2298 from Rockauto is not the correct part for my 2015 500E.
    The 68073206AD (Fiat original) is also not the correct part.

    Both these fit physically, but don't work.

    The 68174026AC (Fiat original) is the one that was needed. On side of the mounting tab there is a number: 25.0711-5229.4 This number was also on the old malfunctioning sensor.

    So after all it was just simply a case of a faulty sensor.

    rear wheel abs sensor.jpg
    Last edited by Guido66; 10-22-2020 at 11:05 AM.

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    PLP (10-22-2020)

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