DC charging fault on a BMW i3 | Case Study
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- Опубликовано: 5 фев 2025
- In this video Steve looks at a DC charging fault on a BMW i3
Starting with the customer concern through to rectification, we use several diagnostic techniques to reveal the intricate operation of the DC charging system and ultimately the offending component.
Using PicoScope we capture DC charging control signals in real-time, so removing the variables and misinterpretation generated by serial data and mis-matched terminology.
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The faultcode description is really misleading, i enjoyed this case study!
Thanks for sharing!
Never heard about LIM module, didn't know it existed, on every EV I've diagnosed it's been all in the OBC itself so i would attack that one first without knowing about that it was actually over voltage from a bad connection.
Might have learned about the LIM while diagnosing but I haven't yet worked on BMW EV.
Have changed the OBC on several cars and been (knock on wood) 100% successful repairs to this day and i always take the old home and disassemble to find the exact fault and found most are bad contact between the PCB (circuit board) and some bus bar or relay inside it. Most of them the PCB is absolutely charred all the way through and often also find other places like inductors for noise suppression have been very hot and insulation gone brown instead of red as many lacquer are in these large inductors
Thank you for the fantastic case study that is packed with practical information.
Some valuable information here. Thanks.
Great work! Thanks for sharing.
hi, the BMW Service Note for the DTC 805519 is ""The fault can occur during direct current charging at a high-power charging station if the high-voltage battery is fully charged but the minimum available charging station charge current is still too great: The charging process is interrupted shortly before the charge state reaches 100%." - hm; but the Service Plan is actually tells your findings: "Check plug connections and lines between the charging connection and the LIM. If applicable, repair the plug connections and lines.If the plug connections and lines are OK, then the fault is caused by the used charger (charge plug, charging station)."
Very interesting Steve! I learned something. Thanks.
This is an excellent case study Steve full of valuable information. Thanks for sharing. Looking forward to having a PLC decoder eventually, it may prove invaluable for plug & charge and V2x issues in future
Nice of you using kts 590, here as we are a Bosch workshop we know this scanner in depth. You can hire the manuals called SIS+M+P, they are excellent technical literature. Could you describe the electric car socket?