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Isn't your meter reading millivolts?
I realize OP isn't an engineer, but mis-reading mV vs. V on a meter is disconcerting. Please be careful and understand what you are attaching the probes to.Yeah its mV, you can place your tongue in there without any worry. Contactors are opened and won't close anytime soon
I realize OP isn't an engineer, but mis-reading mV vs. V on a meter is disconcerting. Please be careful and understand what you are attaching the probes to.
Isn't your meter reading millivolts?
Yeah its mV, you can place your tongue in there without any worry. Contactors are opened and won't close anytime soon
Isn't that .3 volts?
Wouldn't worry me.
When you're emotional and expecting the worst, it's easy to overlook a little "m" to confirm those fears.I realize OP isn't an engineer, but mis-reading mV vs. V on a meter is disconcerting. Please be careful and understand what you are attaching the probes to.
Considering the state of the inverter, that isn't saying much. That PCB is in pretty dire condition. It's hard to tell with that photo resolution, but I think I see at least a few burned traces. Clearly a number of the surface-mount components are likely to be dead. It certainly looks better cosmetically, but I don't think it fared any better functionally.Charger itself faired much better
When you're emotional and expecting the worst, it's easy to overlook a little "m" to confirm those fears.
Considering the state of the inverter, that isn't saying much. That PCB is in pretty dire condition. It's hard to tell with that photo resolution, but I think I see at least a few burned traces. Clearly a number of the surface-mount components are likely to be dead. It certainly looks better cosmetically, but I don't think it fared any better functionally.
Fascinating stuff so far, thanks for sharing.
The charger gasket wasn't tight, as it clearly leaked. The car wasn't deep, so it's not a question of pressure.
The body panels aren't as bad as I'd thought they would be. You should replace all the wiring harnesses, although you still have a bad inverter/motor and pack.
The charger gasket wasn't tight, as it clearly leaked....
Pfft. They ARE coated....... in something. Probably not what you wanted them coated in. lol.
Actually this is pretty interesting, since every module I've dismantled to date has had a conformal coating. Wonder if that changed at some point.
I'm headed to Tesla now to demand my coated controllers!!!!
Unfortunately Tesla did a great job sealing the top and bottom of the charger with nice hermetic seals, however the side of it where the connectors are for the HVJB are wide-open. Water pours in there and then has no drain, so if you pull the side cover off the charger, you will find standing water in the bottom all over the power electronics. Luckily, most of it is conformal coated and the power semiconductors are all encapsulated in wet silicone goo. You should remove the charger and flush it with lots of clean water ASAP and let it dry. (bake in oven at 175 degrees for at least 5 hours once clean) I have recovered flood damaged chargers, so it is possible.
The biggest things I'm worried about are the drive unit and the pack. If the water got over the top of the DU, there is definitely water in the inverter as well as the gearbox. If the water wasn't deep, the pack could be dry inside, but the inverter is not sealed and needs attention ASAP, because like the charger, there is a way for water to get in, but no way for it to drain!
Pull the DU ASAP if you want to have a shot at recovering it. I've recovered 2 DU's that were flooded and they both work perfectly now.
Dropping it is easier than it looks. Here's how:
- Jack the back of the car up using the 2 rear jack points. Because I have access to a forklift, I used it on the rear frame rails with a sling, like this:
View attachment 109443
This made everything a lot easier, but it can be done with jacks as long as you are careful and methodical.- Pull the rear wheels, unbolt the large brake calipers and hang them from the wheel wells (so you don't have to disconnect/bleed the brakes). Disconnect the connector on the small caliper, but there is no need to pull it. It will be come apparent in the next step why you need to disconnect them.
- Pull the 2 large bolts holding the suspension strut to the hub assembly on each side. (A little tricky to get out, but a hammer and a drift pin work well. Be careful not to damage the parking brake caliper connector, pull the motor off if need be.)
- Pull the plastic aero tray off (only the one right under the DU, no need to do the rear). Drain the gylcol coolant from the DU by removing hoses. Try to drain into clean container if you want to save it. (not cheap!) Make sure both hoses are disconnected.
- Remove the 2 shear plates (silver triangle shaped braces near either corner of the batt pack).
- Disconnect the 4 connectors toward the rear of the DU subframe.
- Place a sturdy wheeled dolly of some kind and maybe some wood blocks under the drive unit subframe and lower the car down as low as you can onto these blocks. The lower the better, but leave enough room to still get under the car to remove the 4 large subframe bolts. I used 2 of the wheel dollies like this: Amazon.com: ATD Tools 7466 Heavy Duty Car Dolly Set: Automotive
- Once car is fully supported by the dollies, remove the 4 large bolts and slowly jack the car up, as even on both sides as you can. When you can get access, on the passenger side, remove the rectangular connector and orange cover on the drive unit and unscrew the 2 bolts underneath. Now the orange power cables will just pull out of the top. There is also a ground wire to the frame, don't forget this!
- Continue jacking until the drive unit is clear enough to wheel it out. Chock front wheels and be sure car is stable!
- Remove drive unit from cradle and open inverter cover to drain water. This will require removing the upper suspension links and pulling the CV joints. While you have the unit out, drain and refill the DU lubricant with fresh Dexron VI synthetic. Fill to upper plug.
You'll probably have to pull out the inverter assembly, at the very least the main board.