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  1. coulomb

    The Troubleshooting and Repair for On-board Charger (OBC) Thread

    My version of the Waffle Plate™ diode drop diagram. The forum software seems to resize the image. Full size image here.
  2. coulomb

    Is there a 20 AMP timer for 3 pin charger

    Yes, the problem is turning off, not turning on, the On Board Charger. So if you can guarantee that you'll never stop a charge with the timer, then that's fine.
  3. coulomb

    Is there a 20 AMP timer for 3 pin charger

    It would be a whole lot easier, cheaper, and kinder to the On Board Charger to switch the control pilot signal between the EVSE (AC "charger") and the car. Unfortunately, it's not as convenient. My understanding is that switching the AC power to the on-board charger mechanically (with a switch...
  4. coulomb

    ISA215-HYD module reverse engineering => involved in p1a15-error-condenser-charge-timeout

    ? Surely not all of them. It looks to me that only 2 inputs are so held. But keeping a control pin high (active) turns that element into a resistor. That seems pointless to me, unless it's to match with temperature change the resistance of the other elements when they are switched on. Am I...
  5. coulomb

    Level of charge question

    Those big capacitors come after the Power Factor Correction stage, which uses some paralleled transistors (IGBTs, from poor memory). Typically after the bridge rectifier there is a small (e.g. 2.2µF) capacitor, which I think is to improve power factor during the grid zero crossings, when the...
  6. coulomb

    OBC Swapping Gen1 to Gen 2

    I have also seen "13A" in this position. I wonder if that means it's fixed 13 A, i.e. it doesn't listen to the duty cycle of the J1772 control pilot signal?
  7. coulomb

    Level of charge question

    It's still real. Mechanical disconnect: bad, electronic disconnect: good. It's because you are disconnecting a large inductor carrying significant current, with nowhere for the magnetic energy to go except arc the contacts (not so bad, timers and switches are relatively cheap), and/or zap the...
  8. coulomb

    Why is everything coming on when hook up charged 12v battery

    You need to remove the mid-pack disconnect. It's unfortunately not easy to get to, in Australia it's under the passenger's (left) seat. IF you decide to remove the whole on-board charger from the car, you may want to pinch shut the coolant pipes, to minimise fluid loss.
  9. coulomb

    Main Traction Battery Upgrade i-MiEV

    Lots of good clues, for sure. Thanks! Alas, some critical files are missing, and there is: "It [ the pdf document ] assumes you know how to dump your ROM to a hex file using ECUFlash." I think I looked at ECUFlash some time ago, and decided it didn't do anything I wanted at the time. But it...
  10. coulomb

    Main Traction Battery Upgrade i-MiEV

    I think you want the code tool, it's an "extended" icon, so you have to get to it via a three-dots icon: First highlight by dragging the cursor over all the code you want formatted, then click the code icon.
  11. coulomb

    Battery replacement question

    Wild thought: maybe try swapping the BMU from the same car that the battery came from. It might have to continue to the VCU as well. That might provoke pairing issues, but those might be solvable with the right scanner.
  12. coulomb

    The Troubleshooting and Repair for On-board Charger (OBC) Thread

    Kiev, I'm thinking that the index post as is now might be enough. I was going to pull in the part 2 and part 3, but they don't look like they'll need any editing in future. We can always copy them later, there are two placeholders waiting for them. Feel free to edit it now, rearrange things, etc.
  13. coulomb

    The Troubleshooting and Repair for On-board Charger (OBC) Thread

    If you ever get a repair where the auxiliary battery was wired in reverse polarity, apart from a lot of obvious fuses that need to be replaced, the DC-DC has a 125 A or 175 A (2019 model) fuse in the bottom plenium. This post has a photo. Reverse polarity lets the output diodes conduct with only...
  14. coulomb

    The Troubleshooting and Repair for On-board Charger (OBC) Thread

    I wanted a new thread, but that's OK, I used my moderator powers to make it so. I've made a tentative start, but there are a lot of links to add and so on. We use PHPBB over at AEVA, the same as the old forum here, so you should find it familiar to use. You may care to reply to the thread with...
  15. coulomb

    The Troubleshooting and Repair for On-board Charger (OBC) Thread

    Thanks Phil for your summary, and sorry for the false accusation 🤭. Sigh. I was wrong about that. However, the links can be repaired. Consider a link like number 21: https://myimiev.com/forum/viewtopic.php?f=23&t=4079&p=37962#p37960 . This needs to be changed to...
  16. coulomb

    The Troubleshooting and Repair for On-board Charger (OBC) Thread

    Can you provide a link please? I can't find it. I wonder where they are getting these from. Perhaps a parts seller went out of business?
  17. coulomb

    The Troubleshooting and Repair for On-board Charger (OBC) Thread

    Or just one 16 A thermal fuse. The P10K resistors have a single 15 A rated thermal fuse in them: The chargers have the J15 model, 157°C rated temperature, and interestingly only 5 W continuous @ 25°C.
  18. coulomb

    Admin: New Forum Software (18 December 2023)

    Many but not all links from post to post seem to now land at the start of the thread containing the destination post. The problem seems to be something to do with the anchor part of a URL, i.e. the part after the # character. In some cases this is no big deal, but some threads are at 64 pages...
  19. coulomb

    CMU reporting battery cell temp of 57 deg [solved]

    You may be mixing red and green CMUs. They are not compatible.
  20. coulomb

    CMU reporting battery cell temp of 57 deg [solved]

    Unless @Vladkovsky picked the wrong group of 8. There are some bad diagrams out there, as you know. @Vladkovsky, has the new group fixed the cell that was down? You may find that you have to renumber the CMUs.
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