2005 Prius no start

Hi all, just got the car drove over 1000 miles without issue. Then it rained a few days, could be unrelated. Drove a quarter mile and it all went to ... Finished the 3 miles and it wouldn't start. During said trip red triangle engine and exclamation mark yellow haunted to screen. Turned off the AC to listen. No strange noise. I believe only the ice was running, no hybrid. Regen was working. Current lights red triangle, yellow exclamation, brake, engine, abs, red car with exclaim, anti skid, will go into neutral. Power button will not turn green just amber. Battery 12.4. Hybrid almost full, inverter pump working. No thrown codes under info 3 seconds slash lights on off 3 times. Emv says ok. Brake lights working. Ideas?

 

So inverter pump is working fine. Now charging the 12 volt battery. Car is not throwing codes when info button is pushed and lights on off 3 times. Thanks. Dread to take this to Toyota, would rather go testing various things, about to open hybrid battery and meter the volts, BTW I always do my own work except pressing bearings. Thanks again

 

Ok, so 143 k miles, I'll have to order a code reader, unknown on the battery, 12.4 car off, disco the hybrid battery a whopping 220v on the battery, removed bus bar. Individual cells read mostly 7.9 and one or two at 7.8. Note!!! The car acted no differently with the quick disconnect aka the orange rocker removed. Tried re rocking it and nothing changed. I mean from the self diagnosis to the warning lights nothing changed. Man scratches his head... hope that narrowed things down?

 

12 volt battery's in great shape 12.8 volts put a load on it and it handled nicely, orange disconnect is engaged properly, ordered scan tool. Will clean bus bars on both sides and re install. While I wait for scan tool going to test hybrid relay when start button is depressed using clips and meter, meter has high volt indicator with audio so I can do both at same time. Pretty sure somethings not allowing power thru, perhaps a safety feature for a malfunction like hybrid cooling fan is toast so won't allow relay to engage. I won't bypass relay but if I can find the specs I can pull the feeder plug and see is there's power to engage said relay and if there is and relays not working bobs my uncle or... your uncle. Oh by the way this happened Saturday and my vw golf diesel water pump started pouring water sunday, which is a total timing job but at least it's definitive, thanks again

 

Thanks for all your replys, so here we go. Received scan tool today and pulled P0AA4 which is negative contactor stuck closed, also before scan tool arrived did this test. Tested before the two relays pos/neg of hybrid battery 220v never could get voltage thru the two relays, ohmed them NO CONTINUITY , are they being supplied with 12v yes, but once I plug them in I cannot measure voltage, scratching head. I seriously doubt they both crapped out at the same time. Yes 12 volts are going to the relays, but not opening them....

So in a nutshell no power thru relays, doubt both went at the same time, 220v before relays... what say you?

Is it possible they both shorted closed no current or nor enough amps going thru but again when I plug in the power of this relay it can no longer be measured and still no continuity

 

Thanks for all your replys, so here we go. Received scan tool today and pulled P0AA4 which is negative contactor stuck closed, also before scan tool arrived did this test. Tested before the two relays pos/neg of hybrid battery 220v never could get voltage thru the two relays, ohmed them NO CONTINUITY , are they being supplied with 12v yes, but once I plug them in I cannot measure voltage, scratching head. I seriously doubt they both crapped out at the same time. Yes 12 volts are going to the relays, but not opening them....

So in a nutshell no power thru relays, doubt both went at the same time, 220v before relays... what say you?

Is it possible they both shorted closed no current or nor enough amps going thru to open them, but again when I plug in the power of this relay it can no longer be measured and still no continuity across relay, I'm at a loss

 

Yes have tried jump a starting, I've disco the neg, reset codes, and today removed and gave a solid 12 volt supply to the two main hybrid relays. CLICK on both relays... man scratches head, perfect continuity,but... doesn't respond to the 12 volt feed from the small first relay.. The small relay is connected to the hv, ground, and the 22 ohm resister, power 12 volt comes from the clip coming the direction of the front of the car. Soooo not sure what the hv line and 22 ohm resister accomplish maybe that relay is bad? I saw a post with someone else same problem, is the ecu hybrid location responsible for powering that relay or the ecu under the dash.

Thinking ecu hybrid or ecu or that smaller relay. Thanks for hanging with me.

 

Thanks, looks like the resister feed of HV of the smaller relay had an almost broken wire. I made a temp jumper and my car finally started. Will try to clear the codes tomorrow and see in the triangle of death goes away.

 

Here is a brilliant feed for future reference for any other new people like myself. It s u own the whole system out of the car. Brilliant work and is a school demo for students.

. Put everything back together, after the 2nd start no more codes thrown, thanks much to all by the way looks like someone was in here before me. One of the brackets were bent. Looks like they were trying to get to the blower? I didn't have to clear the codes which was great. Thanks again and look at the you tube video I rate it number 1.