Pain in my PRIUS! (No Start After Engine Swap - Part 1 - P0A84) 

I owned one of those second-gen Priuses. Bought it at 145k miles, needed a battery soon after so I bought the $1000 kit and did it. Drove it 40k miles in a year. Really a remarkable vehicle, and easy to work on. Just a few extra caveats like being mindful of the high voltage, dielectric oil in the A/C, brake maintenance b/c the brakes are also hybridized.

Ivan, I began watching long ago because of your wonderful demeanor, and I cannot stop watching because of your incredible intelligence and knowledge blended with persistence, and patience. Bravo!

Yeah Ivan, Can't wait for part 2 to show up here! This is really helpful for trouble shooting Hybrid car battery issues! Thank a bunch for sharing your knowledge and your techniques for trouble shooting.

Hi IVAN,this vid hit home. I have a neighbor I've been helping with a 2008 Prius,that has issues. 1st thing i said to him after going over and seeing it was,YOU NEED TO GET THE MANUAL or go online PAY WHATEVER it COST and get schematics for this thing.They make it perfectly clear if you fool with the wiring YOU MIGHT DIE!!!haha I can't wait to show him your vid,as you are the BEST at SHOWING and EXPLAINING thoughtful SOLUTIONS to the issues.Like you say and DO,many times PARTS are NOT required.like this fan thing,BOOM !!!that was the parts cannon going off.haha Another fan put in that WASN'T NEEDED.Your lessons are invaluable,thanks IVAN.

14:56 that's the infamous connector of "prius death". it very well known to have water leak in and make it a ships anchor. 🤣 as soon as you see battery cooling fan codes, that's an automatic primary target.

Alot of people dont know this but you can tow charge a very low hybrid toyota as long as the battery contactor closes and its in drive even if the engine is unable to start due to low battery. They warn people in the owners manual you can over charge a normally functional car if left in drive being towed behind a motorhome. The car has a pma brushless motor it makes 220v at 6 amps at 2k rpm.

Plot twist, There hasn't been a problem the whole time, it's just hard to tell when hybrids are idling.

Check the orange security plug at the hybrid battery, most times it is not correctly pushed in

AS you know the battery module consists of several dozens of single cells. Any one of those individual cells can (and do) become unbalanced. If the discharge is deep enough the cell(s) can go into reverse polarity. When that phenomenon occurs there is no way a system charge can provide or preform a so-called restore/recondition/et all. The only proven method to correct a deeply discharged cell is a charging process where each cell is treated individually with a special ac-dc waveform. This is exactly like any lead-acid battery where if the battery discharged so deeply as to allow a cell or cells to go reversed it will never again perform to spec (even though it will pass a voltage test, the capacity is severely compromised). Not saying this is the problem here, but something to be mindful of as you become more involved with these sort of vehicles.

Great thought process, Ivan! This sounds like a very interesting case study (expecting a few goblins at work inside)! Now itching for Part 2 🙂

Looks like another great weekend trilogy in the works.👍😀

Haha, Digging the title Ivan , Pain in the Priass 😮😮😮

A gem of a diagnostic, the prius vs the master tec. Bet you find a few bad cells in that so called new battery. Mine not only had a failed engine (piston rings broken/seized with carbon build up from valve seals failing) but cells needing regeneration with a Tynergy t180, that takes 24 hrs per cell see you in 6 weeks for part 2.

Aux battery 11.8v? NOT fine! You can get strange problems simply from a low 12v battery (in my experience)

Don't know if someone else has already mentioned it. But the way you get the engine to turn on is by pressing the throttle to full throttle and hold. They may do nothing because of the faults. But just so you know pressing the power button will do nothing to get the ice to turn on.

This is another brilliant diagnostic video, problems identified & addressed, can't wait for part 2 👍

Ivan, man I really love the video you make it entertaining and I have learned so much from you. I don’t half understand some of the scopes you do but man it’s entertaining. Sure wish I lived close to you - if I ever had a problem I would take things over to you. Thanks for the entertainment and great diagnostic information- you are one of few that do things right!

Ivan is the safest shore for all the beached whales to land on ! :)

Nice to see some progress, even if it seems slow. Nice that the fan is working. Just need to clean up the crusties on that connector and fix the broken wire, and wait for part 2.

I'm all in, and the part two message pops up. See you next time. Same Bat Time. Same Bat Station.

Seems like every hybrid I have ever had to diagnose, never had just one problem. At least the blower motor problem looks to be an easy fix. I'm looking forward the part 2.

LOL you got me again part 1 waiting for 2, interesting car Prius hybrid, very cool. Semi Flood car or water intrusion at a seal point.

Dunna-Nunna, nunna-nunna, Nunna-nunna, nunna-nunna, BAT FAN!!!!!

Nice almost bought one used when i was in NY state. Looking forward to part2

Ivan, you've got us engaged now! Can't wait for part 2! Thanks for Sharing!

I'm concerned about the aux battery at 11.8V. For a 12V battery, 11.9 is considered fully discharged. That may be too low for keeping the electronics happy for starting the engine.

I love your videos and great diagnostics. Diagnosing and repairing hybrid is so interesting. 10sec is just cranking time to attempt starting. Maybe faulty battery ecu. Looking forward to part2

Thanks!

This is a Beached Whale series! Great.

Great troubleshooting! I find iit interesting that the owner finds that car interesting. I mean, I do too - as far as how it works, but I'd need to cover the car with some sort of tarp and work on the problems thru slits in the tarp. To each his own!

I think batteries begin charging at high current & low voltage. As the battery gains charge, the current will decrease and the voltage will increase. So.... from what I saw, that black charger isn't doing what it should (unless it was in "battery analysis mode" when the video ended.).

Ivan, a Prius is not a beached whale. It's a beached Tuna Fish...

I used to work on an industrial estate where our work vehicle was an old 02 Prius. Thing had been a taxi. It had a wall charger and this somewhat dodgy setup with an inverter to run power tools off the hybrid battery. Saved us having to hump a generator or 30M of extension leads a lot of the time. You would be surprised just how much you can get in one of these. Its just a shame about a particular kind of sanctimonious people who happen to drive some of them.

Great video! I think you're being misleading though saying it's just hybrids, Toyota has been putting similar abs modules and pumps combined as one unit, dating back to the 01-02 4runner 3rd gens and land cruisers if I'm not mistaken and having to replace one in my 02 runner it was a $700 part used off a forum. At least they separated the two units on the 3rd gen. I believe they're a single unit on the 2nd gen Prius's as well.

If the engine sounded like it was running then stopped after 10 secs, the engine might not have actually started but you're hearing it being spun at idle speed by MG1, if no start, it will stop cranking after 10 secs or so

The Maxx charger is supposed to be running before it is plugged in to the hv battery . Just what the manufacture says. They also have an discharger to condition the cell.

Had this issue once with the same code. Replaced the battery ecu located next to the HV battery. Ran just fine.

I picked up a ‘07 Prius for $400 with a missing cat. Of course Colorado adopted CARB standards a couple yrs ago so the only cat option was dealer at $2400. I found someone parting one out and got a cat for $300😊. Well the cat ended up being aftermarket and sets a p0420 😢. Oh well, it’s still drivable and gets decent mileage and I only have $700 into it.

I am so afraid of these batteries exploding or catching fire with these home made devices. I am very interested to see part 2. So far so good!!

OK! Thanks. A new info for me!

Styling aside Toyota know's how to make these cars and systems pretty good, I've seen more than a few with over 300k and still going, basic maintenance and all is well

Interesting case study Ivan!

Cannot wait for part 2... Great video as always Ivan.

Man I love these vids

Ivan, I was wondering ( if you know) is the think tool based off the Luanch? Very similar screens. And do you find it better than the luanch in some ways? I'm really happy with the Launch products. I also noticed how fast the launch is with Fords.

Who would ever have thought there would be battery problems with ev cars in the wintertime 🤣🤣

The challenge is trying to understand all the logic induced in a hybrid electrical system. To some extent the codes raised when something goes wrong are just based on the fact that a lot of people working with vehicles don't have a full grasp of the whole system. One team is working on the battery charger, one is working on the drive system and a third is working with the rest of the vehicle. The third team is still in the combustion engine era.

Hi, Ivan, great video. I would be very interested to know how they power the battery cooling fan with the added wires. If they are simply providing another power supply for the fan, what is that power doing to the fan control box that is now having power applied to its OUTPUT? Try looking to see if any faults disappear if you remove those extra wires.

I can already tell you its a fuel pump or delevery problem or spark. The 10 seconds of running is actually the electric motor cranking engine over.

See this all the time on the Prius Mk2, check the other block connector on the left hand quarter panel as the supply comes in on the left and runs down the length of the boot/trunk to to the right block connector. It too gets corroded, water ingress will be from cracks in the body panel adhesive normally around the roof channels. Awesome video as always Ivan 👍👍👍

Fun fact. A Prius will set a code if you run it out of gas. Customer had his Prius towed in 2 separate times because it died on the highway and both times it was out of gas a set codes for it

When it comes to the Gen2 Prius (2004-2010 maybe?) you can always count on corroded wiring terminals INSIDE the car when you find weird scan tool readings! This was common in the Gen1 Prius too but the second generation Prius was NOTORIOUS for leaking rainwater into the rear of the car, then when you add in stray electrolyte vapors from leaky NiMh cells mixing and condensing all over things you get very "interesting" fault codes that are hard to pin down. But I knew you would come to that conclusion eventually too. It was fun watching you sort the issues out. Brings back old memories for me! Thanks.

Part 2?? Ya got me all excited for the big finale' lol.

Battery voltage seems high. The system should be 201v nominal. And the batt ECU wants 60%- 83% max state of charge. It needs room for some Regen charge. I think 218v should be the max voltage of a fully charged pack at rest.

How did that connector get corroded? It’s not anywhere I would expect it to get water, acid, or soda spills.

ANOTHER GREAT VIDEO

have you checked the battery in the key-fob... 😱👀

I am not sure. Does it help to start car in service mode instead in a normal mode? In service mode would be posibile to run engine constantly and maybe to recharge battery?

that charger looks like a weatherhardened ATX computer power supply to me

Ivan, aka Captain Ahab of mechanics…..chases the beached whales not because it’s fun, but because it’s what he was called to do. I can’t wait for the Novel that pairs with all the videos! 🤣😂

Always a cliffhanger, lol!!!

Ivan: This is a blower motor resistor controlled by a pulse width modulated signal. Me: *flashback of the turbo encabulator video*

I would call that one a beached guppy.

Another odd idea with these eletric vehicles. It's supposed to be able to be charged from house current so it'll go up to 15 mph on the battery then the gas engine takes over and apparently charges the battery a small amount until house current is hooked up again. Well, here this battery is low and it is disabling the engine which is opposite what it should be doing I presume. It doesn't make sense that the electric motor battery has to have a charge to start and run the gas engine. Regardless of the electric motor battery state of charge of low or very low, shouldn't the gas engine start and function? As it is now, the electronics think the battery has voltage and is forcing the vehicle to use the electric motor which can't start because the volts are too low. Obviously the green crusties are throwing a wrench into the operation process so there's got to be more of them along the way in the wiring I'd say. Once that car is fixed, I'd through in a can of Deoxit in the glove box !

10:35 Why do you use a piercing probe here when the copper of the wire is exposed anyway about a cm away?

I've seen that wire broken on every Prius that comes in with that fan voltage code. It doesn't seem to be water intrusion, I think the connector is inadequate for the amount of current it carries over a long period of time and it just fails. Maybe the hybrid battery is low from cranking an engine that won't start. I've heard that if you erase low battery voltage code you can get a few cranks out of the battery before the code resets and disables the start function, unless it's really low. Never tried it. Hybrids are still a learning experience.

Prius .. beached minnow (well, maybe a tuna).

Interesting case. Is this guy from the Scranton area?

But, but, but, Scotty say’s “It’s A Toyama, what could possibly go wrong”?🤔😳🤔

Finally got my favourite tech on a my favourite 🚗 car.waiting for conclusion 👌. Cheers and good luck ivan.please link me to this wall charger system. Please

And if the bat fan fuse is OK check the rob in fuse next😁🇨🇦👍

I saw some bad cells when you were scanning

Hallo Ivan , there is a connector right side behind the plastic. Please check this one .water drain into

Personally, I think we are missing the boat by not owning these cars. I think we should sell our 27-year-old Mercurys and get some of these. I think we would come away with the satisfaction that we helped the environment, saved tons of gas, and got excellent traction in the snow. Clearly, if this guy has owned 20 of these cars and is able to make a hobby of repairing/selling these then obviously they are VERY reliable. Kilmer says these cars have something called an Adkinson Cycle powertrain. I have no idea what that means. The biggest problem with these cars is I would need to bring it to Pennsylvania Furnace to get it repaired. Great video!

Great Video ! I wouder if we have no parts required it part 2

How did the owner build the HV battery charger?

I agree w/ you all hybrid cars out to have the capability to charge at home

One of those cells was flipping between -15 and +15 on the monitor.

I'm gunna throw a wild guess out and say the homemade charger isn't charging through the on board current shunt so it's not going to know when you are charging and it's getting confused

This part 2 malarkey has gone on long enough now 😢😢lol

Camry no start after water puddle....hybrid 2015..... Won't crank over by hand at the crank pulley either..... Not sure the connecting rods are broken

SOLUTION ...Orange Plug on side of large battery has two separate actions ..1st action connects the battery ....the second action pushing it DOWN connects an interlock

How does a connector that high up get corroded? Was this car under water?

Probably just needs a fresh batch of AAA batteries.

Ivan it’s a bad bcm inside of the battery

Cool ivan🤏🏻

GOOD VIDEO!!!

The Delta SOC value is a little concerning

Can't see a reason for the fan in the charger to run when "off".

Why don't they use the 12v battery to help charge or jump start the engine

i bet it was never running for 10 seconds, just turning over for 10 seconds they sound like they are running but aren't.

Was it towed in by AAA or just AAA batteries.😀👍

Nana nana nana nana nana BATT FAN!!

Oh boy, looks like this is going to be fun Ivan! Reminiscent of a college engineering senior project. "Your mission is to figure out this bundle of wires that were submerged in salt water and doctored up by a kooky tinkerer, clean it up, re-wire it back to what it's supposed to be, and get this "beached whale" running again."

You get all the "no starts" ...statistically impossible lol

Have you ever worked on a Datsun Leaf?

I wonder how the connector got so bad? What was the car used for?

Wow, prius! I hate those things lol!! I don't like hybrid stuff. Too many unknowns there! I know nothing about this lol. Great video!!

👍🍻

so you replied to me there’s always parts on holidays but now it seems every video has many parts why