2008 Prius with new 12 V battery won't shift; lots of warning lights

Yes its a long thread but Suzie is very nice and appreciates everyone's help and its interesting.
Alot of posters on this site never even say thanks.

 

I just checked my 2008 with 144K miles. Highest temps I saw was MG1 at 129 while MG2 was at 151.

 

I rebuild Prius batteries. My website, email, and company phone number are at the bottom of all my posts including this one.

 

Yeah, Avi, realised that almost towards the end of the comments though.

 

Someone who already saw this movie told me the transmission gets replaced around comment number 650.

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Here's another post, just to get to 650 a little faster

 

Bump

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You might contact @TampaPrius.com who recently did a clever Gen-4 to Gen-2 battery module update. Google Map shows Tampa is about 600 miles from Huntsville by avoiding the Interstates.

Bob Wilson

 

you're resetting the computer, it starts, and throws the code. kind of a pain, but definitely economical.
now i have to go back and read 289 posts.

 

Hello Suzy, I am having the same problem with my Prius 2007. I changed my 12 V battery. How did you exactly solved the problem? Moreover, what part exactly making the problem? Is it the hybrid battery?

 

Avi has mentioned this a few times in the thread. I would venture his advice its worth his weight in gold.

I started reading this thread again and it made me remember why I didn't get involved. Too many cooks and not enough of them actually have hands on experience. Too much input causing havoc and confusion for the OP (Suzy). All Suzy needs is a good troubleshooter who owns a megger, not a parts replacer. I wish you were in Columbia...........

There seemed to be a serious misunderstanding that the problem existed previously and a NEW HV battery was installed, therefore pretty much eliminating the need to continue talking about the HV battery being the cause. So lets not talk about HV batteries anymore.

If the dealers advice of a bad transaxle is in question, which I can understand someone feeling that way, it becomes basic electrical troubleshooting.

Doesn't techstream "shortwave" show the HV system isolation? 5V is perfect and 0V is a direct short to ground (car chassis)?
Maybe I'm just misunderstanding that shortwave thing, but I'm pretty sure we've used it previously and found water in an AC connector/case. I think the newer versions/options of TS actually break it down to a shortwave value after each step of putting the car to ready and in gear. Even turning on the AC, iirc. Can it make it any easier?

Can't a tech/mech just pop the cable off between the inverter and trans?
Can't a tech/mech just pop the connector for the AC compressor?
What about just visually inspecting for liquids or condensation in the connectors or cable lug areas?
What about just splitting the system into individual parts at the lugs/connectors and use a megger to find out where the problem lies?

I suppose the problem is that "troubleshooting" this requires more than just being able to swing a hammer. But in the big scheme of things, it's still basic troubleshooting to get it down to the faulty component.

 

If I had a dollar for every Toyota dealership technician who doesn't know what a Megaohm is, I'd be fixing these things as a hobby right now.

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I think its just that folks are just replacers. When it comes to the nitty gritty, that's where you see surprises.
Weveygot a lot of such people over here in Lagos, Nigeria, too.
They just don't want to prop further into y certain faults occur, and all that.
They'd prefer a kind of remove and replace scenario, and off they are done.

 

Suzy,
That's great to hear. I hope the problem stays away forever!!
It was the engine air filter you replaced or something in the battery air flow path?

 

A dirty air filter will cause poor running/low power/lower fuel economy but it won't raise engine temperature; at least not enough to cause trouble lights. No, something else happened.

Did the car have an air filter for the HV battery? The gen 2 Prius doesn't come that way from the factory.

 

Know of a place to get a cheap but good tranaxel?