BEV DC Fast Charging Fail

Discussion in 'Clarity' started by jackertracker, Sep 13, 2019 at 10:22 AM.

  1. jackertracker

    jackertracker New Member

    Every morning, I stop at an EVGO L3 fast charger and charge up my Clarity Electric from ~50% to 80% (takes about 10 minutes). This gives me enough headroom to not have to worry whether I'll make it home or not.

    This morning, it would not charge. I tried three different charging stations and had the same result, so I am sure it's the car. I plugged the car in, the green light on the charging port flashed as usual, but it then went dark instead of turning solid green. The charging station reported "failure to communicate with vehicle".

    I will explore later today whether it will charge using a L2 240V charger. I suspect it is the onboard charger used for DC that is the culprit, in which case L2 would work. But I will find out at lunchtime.

    Has anyone else had, or heard of, this issue before?
     
  2. css28

    css28 Active Member

    In theory, DC charging involves the onboard charger much less, without the AC to DC and voltage conversions, but obviously you have some issue. Please keep us posted (even though most of us are PHEV owners with no DCFC option).
     
    AlanSqB likes this.
  3. jackertracker

    jackertracker New Member

    I think you're correct - the DC charging essentially goes directly into the battery. The onboard L2 charger converts AC to DC, IIRC.
     
  4. css28

    css28 Active Member

    Since the SAE J1772 Combo uses the same communication contacts as level 2, that might mean more onboard charger involvement.

    I have CHAdeMO on my LEAF and that's a separate connector entirely from the level 2.
     
    KentuckyKen likes this.
  5. jackertracker

    jackertracker New Member

    Update: L2 charging was successful, so it must have something to do with the L3 DC charging hardware on the car. I will have to take it to a dealer for repair.
     
  6. jackertracker

    jackertracker New Member

    It occurred to me that it could be a fuse, so I checked the manual. There are four fuse boxes in the cabin under the driver's panel, and two fuse boxes in the engine compartment, but I couldn't find anything that appeared to be for the charging system. They are all abbreviations or codes and nothing looked to be appropriate. The fuse for the vehicle battery is 175 Amps!
     
  7. insightman

    insightman Well-Known Member

    When I saw that number in the Owners Manual for my Clarity PHEV, I ordered one (~$12) just to see what a 175-amp fuse looks like.
    Behold:

    upload_2019-9-13_22-3-30.png

    Interesting that it reads "58 V DC" on the 175-amp fuse.
     
    2002 likes this.
  8. AlanSqB

    AlanSqB Active Member

    Look at the contacts on the car to see if you picked up some dirt or grime. The smaller pins on the J1772 plug tend to be very sensitive to this. This was a frequent problem back when I was using fast chargers because people would just drop the handles in the dirt or on the ground. The DC fast chargers are very sensitive to anything like this.

    If they look dirty, you can use some compressed air and a q-tip to clean them up. In extreme cases you could use contact cleaner, but that’s probably overkill for regular use.

    I always look at the inside of the plug at public chargers before using them for this reason.
     
  9. eneka

    eneka New Member

    Try lifting the charger plug while it's initializing the charge. It was a common trip for BMW i3 owners that had issues activating the charger.

    Given that you do it every day, I'd assume something might be wrong with your car as well. Have you checked plug share to see if anyone else reported issues at the same charger?
     

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