Car battery died ... jumped it and now have problems

You don't need to get the manual out for this one. Just hold the button for the drivers window and take it all the way down all the way back up a couple of times and check it. It will be auto again.

 

8) Per Toyota as of 02/05/05

Can the Prius be jump started?

Answer
Yes. Should you need it, Prius can be jump started with any standard 12-volt DC power source, and it actually requires less power than a conventional car. Simply connect the cable clamps to access points* under the hood (which are connected to the auxiliary battery near the cargo area) and energize the computer. Then press the Start button to turn the car on.
*on 2004+ models

 

You do not need to get enough power for a starter motor or such, just enough to get the computers going and the various LANs after that the ready light appears and the HV (High voltage) battery can take over after you start the auxiliary battery will charge. Remember a fully discharged Lead Acid battery will never be the same after you deeply discharge it. In cold temperatures it may not do well. You might need to replace it depending on the circumstances. Take care, drive happy.

 

You also need enough energy to operate the accumulator pump when you press on the brake, though if you're careful, you can press gently enough to get the brake switch engaged to get into Ready without triggering the accumulator pump.

 

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An good way to do this, if you have a marginal jumpstart source, is to first go to IGN-ON mode, push/hold the Power button with foot the OFF brake pedal, and then gingerly press down on the pedal just enough to light up [READY]. That should allow you to hear the "TaDah" ready beep before you hear the "grrrrnnnnnnnnn" of the accumulator pump.

 

Hmm. Wonder if that could prevent Hung on Ig-On?

By the way, the hang on Ig-On happened to me the other day, and I am sure I heard the relays try to kick in.
But that's for another thread.

 

Well, I don't know. After recommending this, I actually tried it, and it won't work. Still I'm absolutely sure that I've pressed Power first, and then went to Ready on depressing the brake peda. But if you do it slowly and deliberately, it doesn't seem to work.

That would imply that there's a timing issue involved, and this may at least be related to the IGN-ON issue which has some timing component to it as well.