Diagnosing The Dreaded Prius “Red Triangle Of Death”

[@dianepfeifer5774]

Thanks for removing the cap from the coolant so I could see actual movement!

[@speedy_pit_stop]

Short and sweet, right to the point. Just how I like it.

[@dogdooley4495]

I love how you don't assume what the issue is and throw parts at a problem.

[@sollykhan2385]

As usual another excellent tutorial, to the point, no excess baggage, THANK YOU 🙂

[@JimmyMakingitwork]

Yeah, the pumps are the most common failure item in these, next is the battery harness which corrodes and terminals break and of course cells can go bad which can be replaced individually. Scan data is super helpful in these, for pumps and variations of .5 volts between cells can cause codes and the red triangle of death, so it doesn't take much. Nice work.

[@Quickwaya]

@theroyaltyautoservice Thank you for the video and showing the flow. I spent 17 years spinning wrenches prior to leaving the auto and HD trucks service in 93 to move into commercial and residential HVAC-R service . (Was tired of constantly having to purchase more tools, stinking like diesel fuel, and looking like I spend my days rolling around in printers ink - too many inframe overhauls etc. lol.) However I have remained in some form of auto repair for family and friends. Damn the technology changes and glad I left just on the issue of the need to buy more and more diagnostic tools. With that said I just 2 years ago wished I had some of the tools. Had my 2012 Ford Explorer that had two issues. One was an electrical issue (dead instrument cluster) and two a catastrophic engine failure due to a failed water pump. Replaced the engine with fully remanufactured. However got my ass kicked with the electrical due to not having the proper tools. (Thanks for pointing this out to all the importance of the proper tools and using them and rechecking after a repair). Though I got my ass whooped I triumphed lol though too much time spent. HVAC has now become the same and thankfully I am retired. HOWEVER, I have my sisters 2010 Prius to help her with and I have no real experience of knowledge working on. It too has the triangle of death and the following current codes C1310, C1259, P0A80, C2175, C2122, C2121, C2124 (all but one TPS reports preasue. History Coes P0A80, B2312 (X2 passenger side & rear left window switch) B278C, U0155, U0142, U0293 - all smart key loss of communication (power source, IPC BCM B, EV Control / Hybrid Vehicle Control). I cleared all codes and all cleared and did not return with the exception of one TPS. My sister reports that she found mouse scat under driver and passenger seat and in glovebox. Im thinking wiring issue, yet this is but a guess and I still do not have proper diagnostic tools just using ODB reader with Dr Prius / Dr Hybrid. Any thoughts other than to take to a qualified shop LOL such as most likely / less likely, areas to look into, and test to do? Thanks

[@crasher88]

love the hybrid diagnostic videos I am always wanting to learn more about them

[@JimenezPerez]

I came here because of the kitten video. I stayed here for the Prius video lol. Subscribed.

[@HYBRIDEVMASTERSGARAGE]

Great Demo & Presentation 🙂 Enjoy your Scope Skills !!

[@alrifainidal]

Great diag for an electric water pump. Thanks for the nice work

[@pontiacsrule8761]

I'm a DIY & don't know anything about a Prius. Thanks for the lesson. Good info to know.

[@ThunderbirdRocket]

Excellent presentation ! Thanks !

[@AlphaPrePurchaseCarInspections]

Keep up the good work! Great video

[@djmobileautoservices]

Quick and easy. Thanks for sharing guys

[@billseay6399]

Hey thanks again my brother love it

[@ChrisHall02]

Recently had this with a 2005 Prius, bought an aftermarket pump, hope it lasts!

[@odishoodisho4904]

Good job 👍

[@danieljohnson4418]

I had the red triangle of death illuminate last year on my 2010 Toyota Prius. I determined it was the high-voltage battery. Not an overly difficult job, even for a DIY'er.

[@Hybriddiag]

P0A80 or P0A93 are very common dtc,s on these inverter cooling pump and replace hybrid battery modules are i am dealing every day....

[@DependableAutoTruck]

thanks so much only have 1 customer with a prius has over 100,000 miles haven't dont anything other than maintenance

[@rodvan-zeller6360]

At 6:15, scope is a window into the circuit, always preferable, I use both scope and meter simultaneous, my preference.

[@rodvan-zeller6360]

At 6:40, unless there is wiring damage, you are approaching it the correct way.

[@Ferraridude13]

Is the inverter water pump supposed to be running all the time? Or is it only when the vehicle detects the battery getting too hot? Is that coolant reservoir not shared with the engine, so it would be dangerous to remove it after engine has come to operating temp?

[@cliffshenkel7350]

The “money” light!!

[@MichaelMorehouse-j3v]

Like your videos, learning a lot from watching them. But I am a shade tree mechanic. Just starting to learn the electrical side of the cars. All I have is a basic code reader, test light, and a couple of voltage testers. Can not afford the fancy gadgets you have. Do you have any pointers to help us small guys out.

[@alltimein]

Is it possible to diagnose if the inverter pump is pumping, if the gas engine does not start? I have a 2010 Prius which turns on, but gas engine doesn't start, and can't gear the vehicle to Drive, so I'm wondering if that doesn't avoid of a proper diagnose of the pump

[@geoffwalker7530]

Pump runs all the time car is in ready, look for the movement in the tank

[@davidhinton3595]

NOPE, it's NOT the Red Triangle of Death. Officially it's the Master Warning Light that alerts us to possible problems in one or more systems. It could be low engine oil.

[@weldingjunkie]

Always good to show the pump speed to based off the commutators.

[@weldingjunkie]

I personally like to see how and where you connect and why. Ecu vs connector etc. I’m willing to bet the majority does. Thanks for sharing

[@johnrpizzaguy]

OBD 2 port. Almost always under the driver’s lower legs With the exception of the first couple of years of Honda being in the center console.

[@weldingjunkie]

@@johnrpizzaguy what? I’m talking about the Scope. And obd2 is def not always under legs. On left side of dash door, or middle of console like Benz. But but I wasn’t talking about where to hook up a scan tool.

[@djmobileautoservices]

​@@weldingjunkielol. Jay Q. You have to hook up on the DLC port 😅😂

[@speedy_pit_stop]

Every issue in every car is different. Wiring and connector location diagrams are your friends.

[@weldingjunkie]

@@djmobileautoservices 😂😂 is that under the hood?

[@MegaChickenPunch]

What was the mileage on the pump before it broke?

[@alext8828]

Will the pump work if the car is only in the ACC position, or does it have to be fully "ON"?

[@eddiereichel9354]

I did a inverter cooling pump on a customer Prius. Man that thing stunk like no other electric failure IV experienced.

[@mastmec]

Great videos, a while back you talked about a fluid to apply to electrical terminals to help with intermittent connection issues. What is that fluid

[@Tylerwilliams02]

Could it be dielectric grease?

[@davidsawyer1599]

Personally, I want and need to see where every test lead is attached and why. Not everyone who views these is in the choir. I don't own one of those vehicles. But if I did. I would want all the insight I could get. There are channels aimed directly at the pros. This channel is all-encompassing pros and someone in a jam looking for help. Not everyone is an automotive technician.

[@MsFireboy2]

Thanks for posting. Sherwood have you guys ever had an EV vehicle with a coolant intrusion into to stator assembly come into your shop?

[@philh9238]

Now if you have how to do an insulation leak test on the high voltage system

[@SuperAayush11]

I get that red triangle when i turn off my car what does that mean ?

[@alinduta5398]

I tested a four wire pump on a 2015 prius with power,ground,activation and feedback signal good power,ground and activation but bad feedback signal,this was causing the problem it was the same fault code low performance, which I find misleading regarding the real fault

[@kclefthanded427]

Sure beats an expensive inverter

[@cheapers1952]

I'm curious who's the proof reader of the comments or are there multiple readers PS a quick short a lab scope Showing the indication and how to get rid of the noise

[@ozarkliving7263]

If all I work on is Toyota and Honda, what Scan Tool do you recommend? Is there one with a built in scope?

[@ozarkliving7263]

What scope program are you using?

[@harveyadams5453]

You never said what kind of pump that is for the amateur guys they need to know that

[@theroyaltyautoservice]

3:33 is where he mentions it. 👍

[@bigdaddymak1439]

Hybrids have an electric water pump separate from the mechanical one on the engine for the hybrid system

[@davidbaldwin2729]

this electric pump is pumping coolant to keep the electrical inverter cool. Prius's have two separate cooling systems with pink antifreeze, one for the engine and one for the inverter. The inverter generates heat so it needs to be kept cool.