DTC p0a94 inside the Toyota hybrid inverter converter assembly ( blown IGBT )

A very interesting episode finally we deep dive into this inverter assembly so we can see the semi conductors IGBT and understand why dtc p0a94 happens so i hope you enjoy.
#hybrid #hybridvehicles #toyota #inverter #converter #prius #toyotahybrid #mechanical #electric

[@marioquesnel]

hi, i am a toyota, hybrid tech, let me say, your kinda of a advanced hybrid course in depths. i transmit alot of your knowledge to my coworkers , by disassembling an HV battery, and they adore to see real shit live, believe me. I haved shared your you tube video’s and they just, like it , so thanks a lot for passing your knowledge to all of us. have nice one

[@hybridsolutiondiagnostics]

Thanks a lot mario 😎😎😎

[@jimcarmichael2395]

WOW!!! I am so impressed with your knowledge, masterful teaching skills, and precise explanation of the components of this hybrid inverter converter. Thank you for sharing your experience as a Master Technician. You are a valuable asset for the new breed of automotive technicians. Glued to your videos...😁😁😁

[@Georgetech10]

This is the second video I've seen from you and it seems that you have a lot of knowledge about hybrid vehicle's. It's amazing how much knowledge you know about it . I'm not a mechanic I don't know anything about electric vehicles but I really love this especially with someone that explains every single detail . Keep up the good work you are doing. You are very very educational!!

[@darrenmcquade215]

I love your video's, so thank you for sharing your knowledge with us. I have used your channel just to learn more about hybrids, as well as repair my father in laws 2007 Camry Hybrid battery. Battery bank 6 or the 12th cell was bad (6.5v vs 7.9v on all the others) I was able to tear the battery apart, perform a thorough cleaning (duct work, fan, battery cells and battery connections) , find the bad cell, replace the bad cell, balance the cells, and rotate the cells to get it running again. Keep up the great work.

[@saltrue1555]

Very instructive. God bless for your teaching. Thank you

[@hybridsolutiondiagnostics]

Very glad to help my friend… 🙌🙌

[@hilalkhamiss793]

Hi brother lm hilal from tanzania i always watch your video and it was verry helpfull b coz l'm toyota prius doctor

[@jeremyah78]

Insightful stuff! I watch to get prepared for the EVs rolling into my shop! Thanks

[@chiponvali5887]

Thanks! You are a professional, for whom I have all the admiration!

[@hybridsolutiondiagnostics]

Thank you so much ✅✅

[@charlottegutunga1148]

Thank you for this video master you the one in all youtubers i 've seen

[@eugeneleroux1842]

Thank you for a very informative presentation. Well done.

[@TrungNguyen-qi7rj]

Amazing video! So educational. I'm now a Prius expert that won't want to fix my car.

[@roseyrose7]

Very educational Sir

[@nadunmelantha6608]

Very good explain, Thank you very much!!

[@perniciousprogressive8333]

For some reason I thought you were in PR. I'm guessing not, or at least hoping so. What a tragic mess... Love your videos either way. I care for 6 gen 2 Prii and bought a Prolong system, so your info has been great!

[@antoniozanello9907]

Complimenti per l’ottimo lavoro!

[@omorfarukontor2223]

Thanks for your help full video.

[@kuvceebxab1]

and we will Continue to watch and learn...

[@hybridsolutiondiagnostics]

Jajajajaja thanks a lot ☝️😁🔋🔋🔋🔋

[@OrbOPic]

*Awsome video*.... Now thats a mega battery charger! ya that gel is pretty cool stuff.. do you save all that thermal paste... lucky for that resister at the start where you went to touch those 2 terminals i thought mmm is there a shorted diode somewhere inside haha, but good to see your showing the internals an explaining the workings of things.

[@MichaelS-ox2xw]

Thanks for sharing that Jose, very interesting content. Good to see the IGBT’s in the Prius inverter. I was unaware of the thermal gel. Goes to show the importance of a functioning cooling system 👍🏻

[@hybridsolutiondiagnostics]

Glad you liked it!

[@kemarbrooks5086]

@Hybrid Solution Diagnostics good day, How can I test an inverter on a 2011 Toyota Camry hybrid? The car won't start and say pre charge contactor stuck closed.

[@mgurnik]

Amazing video !!!

[@hybridsolutiondiagnostics]

Thanks martin 😎👍✅✅✅

[@louloubkk]

Great video

[@epicclipofall6216]

Thank you so much🎉

[@Nissan300zxshowcar]

Awesome video! My 05 Prius needs the inverter to be checked, but is there a test using a megohm meter to check it?

[@tomg8069]

In my opinion there was lack of coolant or driver used all the time sport mode and accelerate a lot where boost inverter built on H bridge from theese four bigger transistors gives then higher voltage so input current is higher and this overheats igbts. I think toyota figure it out and around 1 year ago there was service action in my country where toyota uploaded for free newer software to avoid thermal stress of igbts ;) good video but showing simple schematic how these igbts are connected would explain more to others ;)

[@stanley84pl]

Hall effect - with regular CT you can read only AC current - with hall effect also DC ok - on mg 1 and mg2 you have only 2 phase measurement - the third phase is calculated from Kirchhoff Law

[@enritopciu2691]

Awesome

[@keithminchin1817]

It might be an idea to explain to your students that the low voltage output must be electromagnetically decoupled (for safety) from the high voltage stage with an isolation transformer typically inverted by an H-Bridge. The high voltage side typically uses buck-boost topology since there is not any direct user contact and greater efficiencies can be achieved than with a traditional transformer. Sinusoidal PWM, 3-phase bridges and resolver (PMSM) could be another subject. And while on the subject explain why some 3-phase motors such as the coolant pump motors only have 2 wires and no resolver or rotary encoder for position sensing as they employ sensorless Field Oriented Control (FOC). Just a few ideas for future content. Keep up the good work, always good to see! Cheers!

[@hybridsolutiondiagnostics]

Yes indeed you right but during the training course... but if we apply this deep technical language here in the channel, for sure people will go crazy 😅😅😅

[@deang5622]

You think you can teach car maintainers that level of electrical knowledge and for them to truly understand it. LoL. Good luck with that.

[@deang5622]

An isolation transformer does not electromagnetically decouple anything. Quite the opposite. An isolation transformer magnetically couples the primary and secondary coils together but it electrically isolates primary and secondary circuit. It's galvanic isolation.

[@deang5622]

Oh and apparently not even a supposedly qualified teacher can get the terminology right. Now that *IS* worrying.

[@BraveHelios]

Awesome video, thank you! My wife's RX450h has experienced an issue where the "Check Hybrid System" message was showing followed by a yellow triangle with exclamation point inside it BUT NO red symbol that showed. After letting the vehicle cool a lot... it was back to normal. This has happened twice and around one year apart. In each case, it was either a hot day and/or the car was enduring a bit of strained type driving (in the mountains). The most recent time (last week), after it happened and left us stranded in the mountains, I got it towed home and ran my inexpensive code reader where it came up with codes P2601 and P3000. Unfortunately, I did clear those codes and the issue has not occurred again since my wife only drives a short distance to/from work. Could this be an issue with the inverter or inverter cooling pump or wiring? I can only assume that the damaged inverter you are showing must have given the vehicle owner a red light versus a yellow. Since my car continues to drive okay with no further warning lights or messages, I am hoping the inverter is okay and it is something with the inverter coolant pump. I read somewhere that it might be a stuck invertor pump impeller... could that be intermittent enough to only occur during certain conditions like when it is out outside and the vehicle is being driven relatively hard? Thanks!

[@cooliocrib4409]

Thank you very interesting. I have P060B HV Battery ECU error code. Replaced all the electronics in the HV battery still the error cannot clear. What else can it be? Problem started out with needing the 12v aux battery replacement.

[@eagle69ification]

very nice❤

[@rosaritomex4223]

On my prius 2012 it went bad toyota fix it for free. They extended the warranty for 15 years unlimited miles.

[@prashanshan7125]

Great..Great video.. did have lower 12V voltage..? Bro..

[@pacohdez2]

Awesome video. I have 2 prius, a 2010 and 2013. On the 2013 I replaced the inverter converter with a 2015 unit and it works just fine. But for the 2010 I wonder if a newer inverter converter works too. I searched in a toyota website the inv-conv model and it shows that it fits only 2010- 2011 models. I wonder if they're compatible with newer models.

[@hybridsolutiondiagnostics]

Just make sure they have the same part number 👋😎… thanks for watching

[@steves7973]

Thanks for sharing, very informative, is there a low coolant warning sensor that could have prevented this ?

[@hybridsolutiondiagnostics]

Sadly not... just temp sensors

[@empress9ether272]

Hey if the two bolt inverter cable is broken could that cause B1423 open in pressure sensor circuit and abnormal refrigerant pressure problems ? Also B1443 codes got that lately on my 2013 Toyota Aqua

[@moayyadzyoud6071]

Sir how can we get more cooling for the inverter specially during hot summer because I've already replaced one inverter because of heat in my region

[@PeterJames-cr1ul]

Why is it not possible to replace the transistors and gel? Is it a question of part availability or is there further circuitry damage?

[@amirfalahat6720]

It was great

[@hybridsolutiondiagnostics]

Thanks Amir 👋😎✅✅✅

[@emersonsutherland9319]

Sir My name is Emmie, I bought my Prius V 2013 new in Florida, took it to Jamaica in2015. In 2017 Toyota sent out a recall letter for this same problem. Now I unfortunately suffered POA1A Can I contact you, your video is so very detailed and interesting, thanks

[@estebanamador7601]

ok ok, so, if i´m understanding well, if cooling system fails this can happen? i mean, they don´t have T junction sensors?

[@shawnstthomas4811]

My friend, you are a genius. I blew an IGBT on 2012 prius inverter in California.. I have found a specific issue possibly relating to cold start and giving it full throttle from cold start. Twice. 2 different cars. Same situation. Immediately P0A04. Possibly some safeguards that do not come online Immediately? I disassembled one inverter and found shorted IGBTs

[@hybridsolutiondiagnostics]

This issue is always related to inverter overheating... so just by keeping a healthy cooling system it should be fine...

[@pablogandaraiglesias3603]

Hello, if the diagnosis gives the P0A94 fault, do you have to change the inverter or could it be something else that is simpler and cheaper? Greetings and thank you

[@stephencole9289]

At 18:18 are those pins supposed to be bent like that, and how can they reliably connect to the IGBT's below ???

[@louloubkk]

I have a Toyota Prius 2011 .the igbt of the inverter is damaged. I want to order the part .do you know the part number ?

[@Jatsotserah]

Can you follow up with a video explaining the causes of heat dissipation misfunction? Can that thermal paste be replaced in order to avoid overheating?

[@hybridsolutiondiagnostics]

Most important is to have the coolant system in good conditions... gray thermal paste can be replaced of course...

[@antonjosekurirojas3509]

Hi i hope you can help me i have a civic 2012 pain headheach , in honda is an air cooled by fan to keep alive those igbt inside the “ intelligent inverter unit “ There is 3 of them in this model in my case was the midle One burned Would you help me to find one get one to fix the pice of yunque ?

[@pmartino88]

I just took apart the inverter on my 2011 Highlander Hybrid, it's different and I can't find the IGBT modules... does anyone know if it works differently for that vehicle?

[@t1d100]

👍👍👍👍👍

[@hilalkhamiss793]

My problem is l chaged toyota prius 2 battery cells up to 8.2 but still l have red triangle of death and the fan spinning high,please help me

[@dawi9118]

Hi, I have a new Prius AWD 2022 with the inverter occupying the spare tire space at the rear compartment. I wonder if it's ok to shift this inverter to the left/right by modifying the foam supporting the base cargo booth. Anything that I should know for shifting this inverter so my tire donut can go in. Thank you.

[@hybridsolutiondiagnostics]

Send me some photos…

[@kenlee9798]

How many amps does the 12v dc output of the inverter provide. I saw in the Weber Auto channel that it handles >120a, but is that peak or steady state? I am curious because people connect 3kw inverters to the prius battery to supply ac to things like air conditioners, kettles and other high current items, and I wonder close they come to blow their inverter assemblies.

[@deang5622]

You shouldn't be able to blow the inverter. It should be over current protected.

[@oghenejaborogheneochuko1238]

Please, I need your help on this cold p3004

[@gofmanfr]

Greetings Can you explain to us how it works with a third engine in the Rab4 4X4?

[@hybridsolutiondiagnostics]

It is the very same only bigger because it needs another set of semiconductors to control the 3rd back electric motor generator...

[@geaici-danielleizeriuc9078]

👍🏼👍🏼👍🏼

[@deniskamau7749]

Interesting sir.What about Honda IMA system?

[@hybridsolutiondiagnostics]

Totally diferent transistors 😃👍😃👍

[@deniskamau7749]

@@hybridsolutiondiagnostics ok to my concern what faults do you often troubleshoot on IMA systems please?

[@deniskamau7749]

How can I get to you if I want to enquire something confidential sir.

[@amal-from-USA-2020]

Hello darling.....very nice explain ❤❤❤❤❤ 💋from Cairo Egyptian girl

[@wilsonri]

Very well done and very helpful video. My 2024 Corolla Hybrid has left me and my wife on the side of the road waiting for a tow with warnings like call dealer, low voltage on battery, hybrid system failure; basically dashboard lights up like a Christmas tree. The ECU has been swapped in and out 4 times so far. 12 volt battery has been replaced once. Code p279986. It's been towed to 2 dealers. They can't pinpoint the problem. The latest clue is the 12 volt battery is receiving 20 volts for charging, (way too much in my opinion). We bought this on November 22, 2023. It is now April 27, 2024. It been in the shop for 6 weeks. Total miles 2051. I suggested that it might be the DC to DC Converter. Any thoughts?

[@hybridsolutiondiagnostics]

Send me the diag report and I’ll see how I can help

[@wilsonri]

@@hybridsolutiondiagnostics Customer States - vehicle stopped while driving on highway. Turned off and will not restart. CEL, PCS, TSS, SKID, STEER, BRAKING warning lights on dash. Will not engage in drive or reverse Cause battery failure between diagnostic that was performed. After battery replacement and hybrid control ecu replacement and all applicable procedures vehicle had p279986 dtc. Used doc id RM10000000295B5. Said I needed to perform registration. Reached out to tas for clarification, was directed to begin diagnostic process over. Once confirming original fault no longer present. Reached back out to tas, was told to reach back out. Closed tas case opened new tas case, was instructed to perform a handshake and given the name of handshake to perform Performed all OK at this time. Replaced Battery because battery failed test. I am the customer. This is the limited information they have supplied to me. Thanks Richard.

[@wilsonri]

trying again...Customer States - vehicle stopped while driving on highway. Turned off and will not restart. CEL, PCS, TSS, SKID, STEER, BRAKING warning lights on dash. Will not engage in drive or reverse. Cause battery failure between diagnostic that was performed. After Battery replacement and hybrid control ecu replacement and all applicable procedures vehicle had p279986 dtc. Used doc id RM10000000295B5. Said I needed to perform registration. Reached out to tas for clarification, was directed to begin diagnostic process over. Once confirming original fault no longer present. Reached back out to tas, was told to reach back out. Closed tas case opened new tas case, was instructed to perform a handshake and given the name of handshake to perform Performed all OK at this time. Replaced Battery because battery failed test. I am the customer. This is the limited information they have supplied to me. Thanks Richard.

[@hasankasenanayake8191]

hi friend this can be a symptom of defectiveness inverter coolant pump

[@stanley84pl]

I think the part of the capacitor is not for filtering - is for dc Bus between igbt/igbt

[@antonjosekurirojas3509]

Gues thath the special insultation greease thath help to prevent Heat dama ge is cooked to dust maybe thaths the issue to burn the igbt diodes in honda early models due a mistake of no servicié the air filters of the fan cause the damage

[@wpcote108]

Greetings Jose! I have a client who has this code and I told him to go to the dealership. It is a 2011 Prius. The dealership told him that this car was no longer covered for that part inside of the inverter. Is there a part number for this? Is that something I can do myself with Mechanic skills?thank you in advance, sir!

[@hybridsolutiondiagnostics]

Just buy a used one… it should work just fine…

[@wpcote108]

@@hybridsolutiondiagnostics OK well, of course I can install the used inverter but what are the chances that that one goes bad in a couple years? I guess it’s not easy to replace the intelligent circuit board?

[@dinithfernando4841]

What is the purpose of the inductor

[@hybridsolutiondiagnostics]

Boost the HV Dc before entering the inverter process…

[@dinithfernando4841]

@@hybridsolutiondiagnostics thank you

[@nathanhatcher7096]

I believe we will be sticking with 2nd gen Prius for cab service, between igbt, abs failure, and head gaskets crapping out on the 3th Gen they stay in the shop more than on the road! It kills me that Toyota almost got the 2nd gen mechanically perfect, then screw the heck up on the 3th gen!?

[@hybridsolutiondiagnostics]

I’m not agreeing with you… 3rd gen is amazing… all this issues are more related to lack of service

[@nathanhatcher7096]

@@hybridsolutiondiagnostics No problem! I agree the 3th gen is amazing too! But I believe you missed my point, or you may have proven it, that the 2nd gen can take hell of a beaten with less maintenance lower cost to maintain, for that reason cab companies in the Carolinas are running 2nd gen only! Keep them running bro!

[@robertsmith2956]

I watched this to see you replace the transistor. Maybe find out your source for them.

[@hybridsolutiondiagnostics]

Jejeje you have to replace the complete transistor unit…

[@robertsmith2956]

@@hybridsolutiondiagnostics so knowing what failed is irrelevant since you can't fix it anyways,

[@netog4260]

I am fairly knowledgeable with the old basic electrical/electronics components. This Inverter/Converter is confusing. Why don't we call inverters as reversible rectifier/oscillator combination and converters as plain voltage step down? i don't see any conversion there.

[@markrumble7706]

The inverter is almost always bad when you get a code

[@jasondrummond9196]

Hosey i realise I'm not seeing your tick tock no more what happen man

[@orioltorrecilla9378]

Hibryd cars are POS

[@rogerbryenton9403]

Get rid of the annoying music. It blocks your description. Thank you

[@hybridsolutiondiagnostics]

Focus in the message instead of stupidity... is just an intro dude