Same story won't crank. No dash lights or interior

Could the car have been jumped with the positive and negative wires crossed? Where are you jumping it, at the battery or the jump point under the hood?

 

Yeah. What @dolj said. I'd check the fusible link under the white cover where the 12V positive connects in the fuse box under the hood. If someone connected jumper cables backwards, that's probably blown as well as others. Hopefully the blew before the inverter itself.

PS, good pictures in this thread in post #16 if you need them. How to change Fusible link under hood | PriusChat

 

letting it sit for 5 months, you likely let the hybrid battery discharge, and perhaps ruined it. so yes, check every fuse on the car. hopefully its just fuse(s).
also, clearing the fault memory if there are codes stored might get it going; I worked on one that had a hybrid battery fault and it would start and run after clearing the codes. but the codes had to be cleared each time it needed to be moved. if your hybrid battery isn't toast from sitting, perhaps you can get it going and run it till the hybrid battery charges up.

 

The situation is indeed the same........and the two most common causes are the same too.
You have the battery covered......but it still should be tested. Sometimes new ones are bad too and often new ones need to be charged.

The other common problem is a loose or corroded main battery cable connection.
Most often, the problem is at the frame connection end of the negative cable.

You NEED a multi-meter to chase voltages.

 

Did it say something like P-Lock Mechanism malfunction? If so this is a possible fix for that problem.

P Lock C2310 Fix Fixed Solved Solution | PriusChat

This might be caused by a blown AM2 fuse. You can find that 15 amp fuse in the fuse box under the hood. It's odd but that one fuse can darken the whole car. It's the inverter coolant pump that blows that fuse.

Might not be a bad idea. I have to agree with 69shovlhed that sitting for five months might have killed the HV battery. But the HV battery is not the cause of not starting.

 

WHAT ? Why do you think that ??
A dead HV battery certainly WOULD cause it not to start.

 

Yes that's difficult. Its going to need alot of work. You blew a fuse.

Get a voltmeter and with new 12v battery installed measure the dc voltage to ground at the front jump point.That will tell you if the battery power is at least getting to that main fuse box. if you have good 12 volt there then there is nothing wrong in the rear hatch/battery area Don't go in there again. if no 12 volt there then you blew the 100 amp fuse housed in the positive terminal of the battery. There's a black plastic housing with a fuse inside it mounted to the positive terminal.

If 12 at the front jump terminal there's fuses in that black box that houses the front jump point and there fuses in the cabin where your left knee is hitting when your sitting the drivers seat. Little fuse box cover under there.

The big black box houses the 100 amp main fuse but you wouldn't get a key inserted ding sound in the cabin if that was blown. If that was blown you would have nothing. But check anyway. Its a weird fuse its long and under a white plastic view shield. You can see if its blown in half.
Usually its the dome light fuse thats blown.

I would take every fuse out of both boxes and check its continuity with an ohmmeter.

If confirming the 12 volt is fixed turn your headlights on. Should have bright headlights.

Bad news is once you restore 12 volts to the cabin the car still may not start because you need a healthy hybrid battery for the engine to turn over. So even after all your 12 volt work your going to have to rebuild/replace that big battery. It was not tip top when this started so letting it sit for months will surely kill it imho.

use the search forums blue tab up top. Search HYBRID BATTERY so you can see what so many posters are going through right now with the big battery including myself.

Or You can sell if for salvage its worth at least $2000 as it is.

Good luck and Let us know how your doing.

 

no. the engine has to run to charge the hybrid battery.

the only way to charge the hybrid battery is with a special charger

 

There is no "coming close to turning over".
Either it does or it doesn't.
And NO nothing you do to the 12 V will benefit the HV battery.

 

The big battery turns one of the 2 electric motors in the transmission that electric motor then turns over the engine.. Takes alot of power from the big battery to do that. A healthy battery at least 200 volts. Your big battery was not good before the months of no use. Its done. The big battery will have to come out and be rebuilt.

One of the posters here likes to say: There's 2 kinds of G2 owners. Ones that have bad hybrid battery's and ones that will.

Its alot of work. You can get the battery rebuilt but there's lots of shady Craigs List dudes who will rip you off so no CL. The half way decent joints are like $500. You have a good texas guy not sure how close he is. But none of the rebuilds are permanent. if you get the 12 volt fixed we will give you Matts info.

But spend a little time on the 12 volt issue. If no fuses blown it may have significant damage. We have seen alot of those here. The 12 volt circuit on a G2 is easily damaged if you don't know what your doing.

The g2 is a great great little car with the exception of a badly blown 12 volt circuit and the big battery issue we all are seeing.

 

Matt is nearly four hours from her.....in Weatherford

If she wants to call him....never know....he might have a suggestion or a recommendation of someone closer.

Texas Hybrid Batteries, LLC

Weatherford, TX 76087

 

Don't you love it when they ask for help and then "jilt ya!"