Possibility of Repair of mg2 stator winding

Thanks for your reply, I identify with your summary of putting up with JS - it definitely used to be easier. Ever since keepvid.com started requiring JS in order to work I've been off and on with video-viewing capability - I'll have to read up on NoScript, to begin with.

I had been using a somewhat damaged computer for several months with no probs, but that became somewhat hit-n-miss, so had to eliminate that as a suspect. Right now, I can't even watch vids on the utube site with JS enabled, whereas I could a couple days ago, so this may be some other problem, possibly some kind of malware. Anyway, thanks for your thoughts on malware, I mean javascript 8^).

 

A couple times it was the site I was using who updated and broke my video capability, a couple times an addon changed my preferences to automatically update, and right now I think I might have a malware problem cause this puter isn't working like it did a couple days ago...anyway, I usually check after installing something to see that nothing has 'automatically' been changed in the preferences but sometimes have brainfade or something and don't.

One thing I noticed that seems odd (to me) is I could call up a youtube page while JS is on, then turn JS off, and I'd still be able to watch any videos for as long as I wanted, could do searches in the utube search-box and play any that that would bring up, etc.; Can't do that today though, looks like something has borked my puter.

nah, I never use that one either, nor do I let any of my Windows 'puters on the internet. I just got ffmpeg installed, now I'll read up on it for a bit and see what can happen.

Thanks, good stuff...

Or JS managed to crap-up my puter while I was watching videos 8^(

Actually it's just new to me, it's about 10 years old, a bottom-feeding offering from HP with minimal bios functionality. The board is by Asus and it has an Athlon 64 X2 4200 (one of the early dual-core offerings from AMD) with 3 gigs of ram.

I'll check over there and see what I can find. Thanks for your reply.


Thanks for all your thoughts on this vv

 

Just to update on the T/A, its's starting to get weird.

The t/a has been sitting outside waiting for a warm weather forecast, well-covered by a piece of pond-liner rubber membrane. I ended up getting an insulation tester once i decided I didn't want to be totally blind looking into this problem.

Previously, when measuring with my Fluke 117 between any phase conductor and ground on either MG1 or MG2, the results would be over 40 Mohms ( the 117 can measure up to 40 Meg ohms), but now MG1 shows around 280 to 300K ohms - WTH?! And MG2 shows over 40M ohms on the Fluke and around 20-25M ohms from phase to ground with the Insulation tester (I keep wanting to call it a megger, but it's definitely not a Megger, it only cost 50 bucks).

I found what looks like an old leak of the pink stuff on the ICE side of the t/a, a pinkish deposit that I immediately rubbed off before I took a picture of it - duh!, anyway, there was some pink stuff there, really there was...

This really blows my mind, as it was basically sitting in the same configuration in the back of my truck 2 weeks ago when I checked with my fluke and all motor leads read over 40 M ohms to ground. I tried tugging on the wiring harness that goes to the resolver and temp sensor and saw no change in the readings - have to go think about this awhile.....

 

Good idea, but no cigar, had similar results with a similar DVM by Cen-tech. I'm starting to lean toward there being a coolant leak internally - will try shifting the thing around on the hoist while doing the measurements if it drys up a little
later today. I guess my salvage vehicle will be sitting right where it is for a while...

 

Final followup - rather disappointed to find that the problem resides in mg1, particularly because the dtc's were pointing
to mg2 with the subcodes.

here's a pic of the shorted winding and a couple of the melted insulators in mg1; also one showing the rust deposits on the three stator attachment bolts, I don't think it should be rusting there but don't really know. mg2 looks pristine, at least in comparison, and the megohmeter says it's windings are at least 20 megohms to ground.

 

Aside from the poor picture quality, take my word for it, there's a bunch of powdered rust on the threads of the three bolts holding the stator and the threads in the case where they mount. there is no fipg used at that mounting point.

 

How embarassing, replying to myself to admit that I was wrong - on closer inspection, the orange looking powder more resembles little orange plastic particles, so now I guess it's another variety of thread-locker.

 

No luck repairing the transaxle, mg1's stator winding is burnt.

However, since mg2's resistance was kind of low (around 20Mohms) I baked it an hour or so at 250 F, then (hopefully)
sealed it with some special varnish. Now insulation resistance measures a bit over 40Mohms, just need a transaxle
to put it in.

 

No, not rewound, I was just considering taking to a motor rewind shop for a bake to dry out the insulation, rather than use the kitchen oven, but the guy wanted 250 bucks just for that!

I think down to 10 Mohms is acceptable to Toyota for proper operation, but 40 Megohms is closer to what they start out at new.

 

No mess, just adding one more layer of insulating enamel to the winding.

To seal the stator winding it against moisture ingress.

 

I don't know, was it coming from you?

J/K, I know what you mean, I think it started suffering from moisture ingress after the original owner took a hard hit to the transaxle by road debris.