@@InternetDude I was going to write that Scotty had been giving lessons. However, when I had to speak , or make presentations, I guess that I moved my arms around , also. This is fascinating stuff and needs to be watched several times to get it clear in my mind.
I wonder if my local Toyota dealership , here in England, understands how the Prime models work. I have to watch this series several times, making notes, to grasp the detail ; and I gained a degree in Physics with Electronics, back in 1961. At the moment I own a 2011 Toyota iQ 1.0 manual for running around town, and a 2005 Volvo XC70 for bigger loads. I think that I will keep these working for as long as possible.
@@johnbunyan5834 That's cool that you made notes, John. If I owned one, I would have too. Even still I'm tempted as I see it as a challenge. This car intimidates me though..even if I had every special tool at my disposal, I think it would be too mind bending during a troubleshoot. You'd be putting so MUCH faith in the wording of the shop manual, it'd be hopeless if it had glitches and misdiagnosis. And I've run into more than one shop manual that simply gave very bad advice. Interesting to hear about your Volvo. In your opinion, are Volvos worse, better or similar since Deely or is it Geely? got behind them? Thinking ICE originally..but what about if it was an EV version? I hear China has some of the best EV tech going, but that they keep the 'good' stuff for themselves. Any thoughts?👍
Great video, thanks. Just wondering if you were aware. Toyota UK has just moved to issuing the Relax warranty. Basically on every service Toyota gives to your car it issues a one year warranty. This last for 10 years or 100k miles on each yearly service. It also covers second hand Toyota's up to 9 years old. Toyota must have a lot of faith in there vehicles and technicians 🙂.
An incredible display of engineering by the Toyota Geniuses. And you could make a career at specializing just on this specific vehicle subsystem. Well Done.
Great video AMD! Love the details. I would love if you did a simplified video from a practical standpoint. For example, let’s take heating up the cabin. If temperature outside is 40 F, what are the simple steps we would need to take to heat the cabin. For outside temps below 14 F, what are ways you could warm up the cabin, etc. this way we would know what things we would need to do for different situations.
above +20f you can use the "hold ac" button on the key fob. It acts like a 'remote start" but only runs the HVAC system. Just be sure to have all our doors closed, and leave the heat settings on when you power down. If its below 20f outside, that OEM key fob remote start function sucks. I wouldn't even bother. Below 20F just hit the defrost button, this will force the gas engine to run, which will give you useful amount of heat in the winter. Once its HOT, you can turn it off and run on just EV then as the coolant will already be HOT, and the heat pump can maintain that without burring gas. please keep in mind if you part inside, burring gas will generated harmful carbon monoxide. So use caution. Adding an aftermrket remote start is not that helpful on a R4P unless you do some pretty wild stuff with that install. The two big issues are it too runs the weak heat pump, and it wont work AT ALL if plugged in,
@@careytreesh4583 Do you mean won't work at all if an engine 'block heater' is plugged in? I'm a huge fan of block heaters. Use them on my ICE only car for anywhere from 30 min to 3 hr if -35Feh. This was a very illuminating video. I was feeling quite skeptical about owning a Prime, but the deal-breaker was if you catch a rock and spring a freon leak, there isn't even a limp-home mode. You just bought real estate on the shoulder.🙁
This is the first I've heard that the a/c system is critical to the traction battery. Lots of older cars (more than 10 years old) are driven around with non-functional a/c systems, because for many cars that old, the whole car isn't worth what an a/c repair might cost. I guess this is no longer an option with any EV or PHEV that uses the a/c system to cool the battery.
Thanks for all of the videos-Learning a lot, just got a RAV4 Prime and its an awesome car. Does the battery still cool if I don't use the AC in the summer? I generally don't use AC until about 92F degrees (keep window down under 92F) and even then its set to 79F. Is this still OK with the Prime or should I start using AC at lower temps. Have no problem using heat in the winter (and part of spring/fall in NJ) as I prefer warmer weather to cooler.
After waiting 11.5 months, my 2022 RAV4 Prime finally arrived on October 16, 2022. It's a great car, and I like it very much. But ... I live in Wisconsin, and figuring out how to heat the cabin has me frustrated. I understand that the heat pump doesn't function below 14 degrees F., but the whole system doesn't seem to function consistently, and I'm not sure how the various EV-HV-Eco settings affect its operation. Sometimes the system steams up the windows, and sometimes it doesn't. I'm going to keep on experimenting to see if I can get it figured out. This video helped a little, so thanks for trying to simplify a very complex system. I'm sure you know that Freon is banned in the U.S., so I assume you're using the brand name generically for whatever refrigerant fills the RAV4's tubes.
Wow! I love my Rav4 Prime, but this video made my head spin. Still, VERY good to know this. Now, I wish someone would explain the electrical system to me including: Normal operating mode; Room Mode; Accessory mode.
Great info! I would love to see a video on the electrical system. How the high and low voltage system interact and how robust the 12v system is for accessories
If your thinking about adding a big car stereo sub system, think again. You only get 125 amps on the 12v side. Most of that is already in use. Adding more load puts more stress on the power converter which is a very expensive part that might have its warranty void if YOU overload it. Power inverters (the kind that output 120vac) demand MASSIVE amps off thee 12 volt system. 300 watts at 120vac is 30 amps off the 12 volt side. 1000 watts is 100 amps. 1500 watts is 150 amps. I think the fuse will pop at 125 amps directly off the battery posts. I ran into 12v car battery charging issues quickly when I tried to pull too much juice in ready mode.
Could you please talk more about the cons in the Canadian cold temperature? I am now wondering if it is a right choice to buy this car or not. Please comment, thank you.
I have a Rav-4 Prime that I love, but during the cold when you start the heat, there is a very loud vibration that rocks the car. Videos are all over the internet, but every time I went to Toyota, they said they couldn’t replicate it. :(
Hi! I know exactly what you’re referring to. No resolution to this yet and nothing official yet but it could be a normal characteristic of the heat pump system. If I know more I’ll let you know in a video
I am experiencing the same R4P heat pump vibration issue. Where I live it is cold 6-7 months out of the year. Especially bad when leaving from a 50 degree heated garage and the temp is below 30.
I had this exact thing happen to my old Prius C when really cold…ok really cold in Los Angeles (upper 30’s 😅). Only happened twice. I shut off the car real fast and it didn’t do it again. It was a violent shaking.
When the Rav4 Prime is off and you don't have the charger plugged in, what are the possible normal noises you could hear from the car? My understanding is there is the EAVP test system that comes on periodically. Would any other fans come on by themselves during this off time? Also would the heating cooling come on to condition the battery or does that only occur when you are charging or have a departure schedule with the charge plugged in, or actually have the car on?
THANK YOU SO MUCH FOR THIS VIDEO. MY 2021 RAV4 Prime 30k kms has a failed Pressure hose and I took it to the Dealer. The part is back ordered and they told me I could drive the car. I informed them the battery is indeed AC cooled (because of your video) and driving it could potentially damage it. I will be selling the vehicle as soon as its repaired. I'm an automotive service technician. I finally bought a Toyota because of their reliability....oops.
My new 2024 Rav4 Prime XSE Warranty and Maintenance Guide does not mention the AC service at 80,000 miles. In fact, I don't see anything about it at all there. Has this changed since the 2021 models? Do we still need to do that?
AMD, here is a nightmare scenario for you,lol! Tomorrow you go into work and your first job is a Rav4 Prime with a leak in the HVAC system. You have to track the leak down. Hope your employer has a lot of leak detect dye and you have the patience of a saint! Its difficult enough to find a leak in a normal auto AC, can not imagine what it would be like to find a small leak in this system. The engineers that designed that system should be required to repair them.
Yea, I already thought about that. I've done almost all my own car repairs and maintainance (after exhausting included dealer work) since learning how to drive 40+ years ago but I draw the line at HVAC repairs and wheel alignment. This might be the reason why I buy a Toyota Extra Care extended warranty.
I have a couple of video ideas, we need a nav update video I can’t find any info for my 2018 prime, also I was wondering if it would be possible to put the new 2020 rear seat on my 18 prime great job on your videos keep up the good work
Is this system only on the Prime? Or are they on all Nav 4? Also, what about road noise on the highway, I have watched a lot of videos about this...........Doesn't seem to good a keeping road noise out. I am looking a 2022 Corolla SE or a Rav 4 LE...........
Hi. I'm the lucky owner of the Rav4 Prime. My vehicle was imported from USA and local Toyota dealer in my country currently not have the similar cars for selling. My car needs the refrigerant refill as AC tube was damaged and now system is completely empty. I doubt that local Toyota dealership stuff will have the experience of the HVAC of PRIME model. Are there any differences of refilling the AC system with refrigerant specific to Rav4 PRIME model?
Thanks for the detailed explanation! Just wondering if the coolant needs to be vacuum filled, or can it be filled and burped as usual? I’m doing exactly what you wouldn’t recommend, which is rebuilding a RAV4 Prime that was in a front end collision 😬🤣
Thanks for a great video and gratz on hitting 100k subscribers. I got a question. If I like to drive with windows open and A/C off. Does a computer kicks in HVAC to cool a battery or battery cooling only works when I operate HVAC from a dash board?
Great informative videos thanks for sharing you knowledge. I’m considering buying a RAV4 Prime and was wondering with all that stuff in the way how difficult is it to change the oil for a diy guy?
I want a free rav4 prime :) problems solved lol According to your diagram, if there is a small leakage anywhere at all, the car (or spaceship) is screwed :)
Great explanation, some what different to the Korean offerings, and a better explanation than the tech data 👍 Do you know if the ECO Mode on the RAV4 Prime plug ins drive Mode selector causing the heated seat to come on ?, owners manual says nothing about it
AMD, HVAC systems etc. have come a long way from the bad old days. When I started driving you could not even count on your car coming equipped with a rear defroster! :-(
correct me if I am wrong .At 8:04 when system should cool down the battery shouldn't the very bottom arrow facing opposite (both arrow are facing toward battery ).And also How does heating the battery work? thank you very much for sharing all the information.
Hi! Good catch! I was waiting for someone to see this. So this is one that is not clear and not published. But here’s the explanation that we got. It uses one line to supply and the other to return and flips back and forth as there’s a 3rd valve inside the battery. And the battery heater is electric just turns on and off by command of the computer
Hi, I have two questions please. I am considering to trade-in my 2021 RAV4 Limited to a RAV4 Prime due to increasing gas prices. Question 1: Should I do the trade-in or keep it for few years? Number 2 question: I live in Toronto, wherein we have frigid weather during winter time (may go below -25C or Winchill of -55C); and summertime (with 30C to 40C heat). My concern is with the heating or cooling the car during this frigid weathers. I hope to hear from you. Thank You.
Hi! Honestly in frigid weather the prime doesn’t do as well as most hope. Needing heat in that kind of weather will force the engine on and kinda defeats the purpose. A hybrid might be a better option but I wouldn’t trade in your RAV4 it’s too new and you’ll loose a lot more than the cost of gas savings
I understand how a heat pump works, and understood a lot of the general concepts discussed here, but the diagrams are not well drawn and are confusing. An example is the diragram at the 8:20 point it shows coolant flowing into the battery at upper and lower lines. I would expect one to be input and one to be output (even if flow is reversible it should be in one direction at one time) - the diagram does not make sense. There are also many cases where the coolant appears to be allowed to flow in more than one path at the same time. This may well be the case, but there is no explanation how this works for the system heat transfer. While most of The Car Care Nut videos are very good, I found that this one did little to explain how this system works.
Hi! The idea of this video is to give a general idea of how the thing works. I could do a full video of exact details of how it switches the flow inside the battery to use one line as supply and one line as return.
@@TheCarCareNut That would be great if you could do that kind of video! I am getting a RAV4 Prime in a couple months and I am trying to learn as much as I can about it - especially the technology that is real actively new for this model.
Very helpful video which made me determine to not get the Prime and stick with the regular hybrid. Regardless of how reliable the AC system might be, it sounds way too over engineered and bound to break at some point. I just don’t want an AC system issue to be a factor that prevents me from driving a car. Just seems silly to engineer it in that manner. And refilling the system every 80k miles = $$$$. You know those mechanics are going to charge a lot for 1234yf refrigerant and labor.
Thank you for the video!. Does the system need to be topped off at 80k miles because of a shaft seal leaking on the compressor (like the old days)? Or is it just a "just in case there's a leak" checkup?
@@TheCarCareNut I assume the procedure is to pump it all out, and put it back in by weight? It would be very difficult to do it by gages right? its difficult to do any car by gages, but a R4P? OMG! no thanks. it is r134a still right?
Cool, thanks for sharing. Heat pumps that do a liquid to liquid transfer of heat is nothing new. Water to Air heat pumps used in homes have been doing this for over 30 years.
They seem to suck in Indiana weather! I re-engineered quite a big of the parts of the r4p to allow it to safely burn gas automatically while still plugged in via an aftermarket high quality remote start.. That burn gas while plugged in was my hack. But now I loved my r4p. The heat pump is ok on cold days if the gas burn got thing hot first. So I can still enjoy EV driving in the winter. With a 100% battery level each time too since remote starting like this uses very little EV power.
Good video. I am sure it could be clarified a bit in rev2. I would start with the goals as you did but build that a bit so the audience knows that battery cooling changed from strictly air cooled to refrigerant conditioned. Second, while the Prius Prime video described the electric supplemental heating, the use of a quick abbreviation here did not help. In a similar manner I would explain that any refrigerant system does one thing - it transfers heat from one space to another. In AC mode its from the cabin to the outside. In Heat mode its from the outside to the cabin. It might be good enough to note that a heat pump system can switch directions. And advanced automotive heat pump systems work better than typical residential heat pumps because the advanced systems a) use variable capacity compressors that can run higher than 100% because b) they utilize a compressor overheating control known as hot gas bypass and c) because they utilize electronic metering devices instead of mechanical equivalents. Recently these advances have been become available in the highest end residential systems to allow full heating down to 5f. In a similar manner the advanced techniques in automotive applications provide usable heat to these very cold outside temps without relying on high wattage electric heating techniques which are obviously bad for a battery operated vehicle. Finally, understanding that a hybrid does have an engine that, when run, provides exceptional heat, requires some valves to take advantage of it. And an engine water coolant to refrigerant system heat exchanger to eliminate the extra coil inside. An interesting aside: Big buildings routinely use refrigerant to water heat exchangers in systems commonly known as chillers. Geothermal heat pumps used on buildings also use water to refrigerant heat exchangers. Where Toyota excels is when they incorporate industrial technology of twenty years ago (variable capacity heat pumps and water to refrigerant heat exchangers) into affordable and mobile automotive systems.
Great video! Is the A/C compressor used in the Prime used in other hybrids like the Camry / Venza? Or is the compressor exclusively used only in the Prime..
Hi AMD, my 2021 Camry hybrid came with Auto climate control-dual(no other option). How can I reduce the cooling in order to keep the compressor asleep as much as possible without triggering the the heater core door? (The control has SYNC knob). Trying to save gas, so l drive on ECO mode and the AC displays ECO.
I believe your battery cooling diagram may be wrong, I would think there should be a suction line return to the accumulator. From what I see your showing two liquid lines and two metering devices and no return of the boiled refrigerant. How can that be?
Are their any 4Runners for sale at your dealership or others near you? We can't find much of anything for sale near Indy and have driven to all of them over and over.
I have a 2021 Rav-4 Prime that I love, but during the cold when you start the heat, there is a very loud vibration that rocks the car. Videos are all over the internet, but every time I went to Toyota, they used the TSB which told them to rest the HVAC system which didn't work, then the 2nd TSB stated to replace a HVAC tubing and that didn't work. They compared my RAV4 Prime to another RAV4 Prime both cars have the same issue. They told me it must be normal, I told them it's something with the heat pump when there is cold weather. In the summer it doesn't have a problem. So it's documented with Toyota and in my records so if there is a problem down the line then Toyota can if it on their dime. Any suggestion on how to fit this would be much appreciated.
Yikes, I was thinking of financing a Lexus NX 450h (which is based on the Prime), but all of these complications sounds like expensive repairs in the long term. I think I’ll just lease
Watch the NX videos by popular TH-camrs who went to Texas. You'll hear them say the NX is going to be roughly 10 grand more EV range about 36. There's going to be a lot of people lining up to pay top dollar for the status of having the brand new Lexus NX hybrid plugin. Which is nothing more than a RAV4 lexified. I'm on my second Lexus I personally can't see the reason to spend 10 grand more for a badge and some extra comfort. Then again I have a 45 mile round trip commute. Food for thought. Variety is the spice of life.
@@benjamintucker9829 Yeah the more I see the interior of the NX - the more unappealing it is, the dash is just so bland and uninspiring. I don't like that the doors are electronic, either Not only is it slower, more cramped and less fuel efficient than the RAV4 Prime - but you're paying more. Seems like a foolish choice, unless they revise the heck outta this thing
me too. HVAC repair is inevitable, esp on one with so many fittings and valves. I bet labor alone would be $1000 to even do a simple repair on this system. Trying to find a leak has got to be a total nightmare,
I understand the system, but why not toyota use small electric heater on heavy duty mode just to help generate heat? Yes it will sacrifice battery. but its okay to borrow it for a while right?
As always, enjoyed your video. I have a question about a 2017 4 runner. Is the 4 runner equipped with a" port" that can be used to install a brake controller for a travel trailer ? As always thank you very much. 🤓
Great explanation. I was surprised to see the heat pump doesn't seem to be designed to warm up the battery. Lithium battery is a dead weight in low temperature isn't it ?
@@TheCarCareNut Thank you very much for the answer. I've just crashed my Rav4 2019 so I consider to buy basic PHEV or top hybrid Rav4 again. Price is about same.
Complex YES! Effective on cold winter days? NO! This car as the worst heater in it I have ever owned. So bad in fact I added a remote starter to it. STILL SUCKS! It defaults to the heat pump mode which is pretty much no good at outdoor temps below +20F. But I'm not the kind of guy to just accept it. I did something about it. i can now remote start my r4p and get it up to 100f cabin temp by forcing it to burn gas, even with the plug spout still inserted. i did it safely too, without hot wiring the car's safety checks for plug insertion. i know the car-care-nut is not a fan of after market remote start devices, but i have a feeling even he would approve of how I pulled it off. His videos, like this one where very helpful. Its not an easy install, or an easy fix. The car itself never sees it electronically. No computer interfaces at all. No bus tapping. No data at all. . I'm tempted to send him one to see how challenged he would be with the install being the expert he is on HPEV's. Loved your video on the xtool D7, also a great tool for this DYI project. Reach out to me if you want to do a video on it. careytreesh@gmail.com
So why does the hvac system make a “clunk” sound on start-up in cool weather? I bought mine in March when it was still cold out and every morning as I drove out of the garage and turned on the heater it would make a loud clunk sound. And if you look online at forums this is a common occurrence. No such sound with the cooling side in summer.
Hey Amd, my wife has an 2011 Lexus CT200h, she took it to get the oil changed yesterday and on her way back she got a check hybrid system message and it stopped accelerating, they also topped off her coolant and changed the filter in the dash. Any advise would be appreciated. Thanks
Hi. I disconnected the air tube on my Toyota 21 CHR that sits above the radiator and now I have a check engine light. Will it clear over time? I was changing the horn.
Thank you for your response. Although this is not relative to this particular topic, One of your recent videos describes Toyota prep before its sold to a buyer. Low and behold The 2021 CHR was delivered to my nephew sprung an oil leak. At 1000 miles The oil fill cap fell off and wet the entire front of the engine and surrounding area. He only realized something was amiss because of burning oil on the exhaust. He was able to add oil to the marked level. What is his recourse with Toyota dealer here in Queens NY? They obviously left the cap loose.
Already had issues, it is not providing any cold air in the cabin above +22C (71F) (same for cold conditions under 0C (32F), no warm air). Got it checked, not low on freon, they performed a A/C service, still not better. Any thoughts?
The Canadian built RX 350s are great. Look at the Carfax. Low mileage Plus did least amount of owners and no accidents. That's the most popular Lexus being sold for years. Good luck Happy Hunting
Since heat is sent in the cabin by the coolant, does it mean that adding a ~600CAD "premium plug-in block heater" would allow or significantly enhance HVAC heating under 10F ?
The block heater will need continuous power to work as soon as you turn it off the heat will be consumed rapidly and not replenished. Also the system by software won’t even operate below 14 F so it would just turn on the engine to keep the heat going
@@TheCarCareNut That block heater is not a bad idea tho. If a large section of the coolant is kept hot by the heater, and the car was started quickly after it was unplugged, Id think you might get heat much faster then normal even on a mild day.
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Great video. Lesson learned: The greater the number of hand/arm movements with added speed indicate the seriously complex nature of the topic. Thanks!
He’s talking with his hands like Scotty Kilmer LOL
Mechanics use their arms often to explain things, it’s just a habit 😉
@@InternetDude
I was going to write that Scotty had been giving lessons.
However, when I had to speak , or make presentations, I guess that I moved my arms around , also.
This is fascinating stuff and needs to be watched several times to get it clear in my mind.
I wonder if my local Toyota dealership , here in England, understands how the Prime models work.
I have to watch this series several times, making notes, to grasp the detail ; and I gained a degree in Physics with Electronics, back in 1961.
At the moment I own a 2011 Toyota iQ 1.0 manual for running around town, and a 2005 Volvo XC70 for bigger loads. I think that I will keep these working for as long as possible.
@@johnbunyan5834 That's cool that you made notes, John. If I owned one, I would have too. Even still I'm tempted as I see it as a challenge. This car intimidates me though..even if I had every special tool at my disposal, I think it would be too mind bending during a troubleshoot. You'd be putting so MUCH faith in the wording of the shop manual, it'd be hopeless if it had glitches and misdiagnosis. And I've run into more than one shop manual that simply gave very bad advice.
Interesting to hear about your Volvo. In your opinion, are Volvos worse, better or similar since Deely or is it Geely? got behind them? Thinking ICE originally..but what about if it was an EV version? I hear China has some of the best EV tech going, but that they keep the 'good' stuff for themselves. Any thoughts?👍
I have a RAV4 Prime… fortunately the system is not complicated to the driver, it just works.
Indeed! Love my Prius Prime and works flawlessly
Let me know what the repair bill is when it decides to not work 🥴
@@Xainlrd if this is your thinking , you will never buy nothing modern or tecnologic....poor life , my opinion
Great Video! As a retired mechanical engineer I understand refrigeration cycles and this video really explained the system well!
Just got a New Rav 4 Prime so thank you so much for these tutorials which are critical in my plan to provide the best care for it.
Great video, thanks. Just wondering if you were aware. Toyota UK has just moved to issuing the Relax warranty. Basically on every service Toyota gives to your car it issues a one year warranty. This last for 10 years or 100k miles on each yearly service. It also covers second hand Toyota's up to 9 years old. Toyota must have a lot of faith in there vehicles and technicians 🙂.
Then i too have faith in any Toyota basically
Plural of Toyota is Toyotas
An incredible display of engineering by the Toyota Geniuses. And you could make a career at specializing just on this specific vehicle subsystem. Well Done.
I feel like all of my time watching videos on water cooled pc systems has prepared me for this next boss. Really cool video.
Great video AMD! Love the details. I would love if you did a simplified video from a practical standpoint. For example, let’s take heating up the cabin. If temperature outside is 40 F, what are the simple steps we would need to take to heat the cabin. For outside temps below 14 F, what are ways you could warm up the cabin, etc. this way we would know what things we would need to do for different situations.
above +20f you can use the "hold ac" button on the key fob. It acts like a 'remote start" but only runs the HVAC system. Just be sure to have all our doors closed, and leave the heat settings on when you power down.
If its below 20f outside, that OEM key fob remote start function sucks. I wouldn't even bother.
Below 20F just hit the defrost button, this will force the gas engine to run, which will give you useful amount of heat in the winter. Once its HOT, you can turn it off and run on just EV then as the coolant will already be HOT, and the heat pump can maintain that without burring gas.
please keep in mind if you part inside, burring gas will generated harmful carbon monoxide. So use caution.
Adding an aftermrket remote start is not that helpful on a R4P unless you do some pretty wild stuff with that install. The two big issues are it too runs the weak heat pump, and it wont work AT ALL if plugged in,
@@careytreesh4583 Do you mean won't work at all if an engine 'block heater' is plugged in? I'm a huge fan of block heaters. Use them on my ICE only car for anywhere from 30 min to 3 hr if -35Feh. This was a very illuminating video. I was feeling quite skeptical about owning a Prime, but the deal-breaker was if you catch a rock and spring a freon leak, there isn't even a limp-home mode. You just bought real estate on the shoulder.🙁
You get in, press auto, set your temp and forget about it. The system does the rest automatically.
More power to you SIR, my head is still spinning understand this complicated system 😅
This is the first I've heard that the a/c system is critical to the traction battery. Lots of older cars (more than 10 years old) are driven around with non-functional a/c systems, because for many cars that old, the whole car isn't worth what an a/c repair might cost. I guess this is no longer an option with any EV or PHEV that uses the a/c system to cool the battery.
Thanks for all of the videos-Learning a lot, just got a RAV4 Prime and its an awesome car. Does the battery still cool if I don't use the AC in the summer?
I generally don't use AC until about 92F degrees (keep window down under 92F) and even then its set to 79F. Is this still OK with the Prime or should I start using AC at lower temps. Have no problem using heat in the winter (and part of spring/fall in NJ) as I prefer warmer weather to cooler.
This scares me as I am regular A/C tech. I know this is a car but it will some day make it to houses with battery storage. Great video by the way.
Seven months ago you had 10,000 subs....now just went over 102,000!!! Way to go!!!
Thank you!
Oh my god.....I confirm that the system is so complicated.....but it works and it is reliable.... thanks for your job I learned a lot from you 👍👍
Marvel of engineering, only somewhat assurance is that its from Toyota.
Dear, also please do a series about maintenance of these ACs.
Wow seen the full series and it is very impressive. Thanks for the explanation.
Great video, love the channel. Yes, that was complicated, but very interesting. My son-in-law has a rav4 prime, we have lots to talk about.
Thank you for making these videos
I dislike complicated cars but I like this video!
After waiting 11.5 months, my 2022 RAV4 Prime finally arrived on October 16, 2022. It's a great car, and I like it very much. But ... I live in Wisconsin, and figuring out how to heat the cabin has me frustrated. I understand that the heat pump doesn't function below 14 degrees F., but the whole system doesn't seem to function consistently, and I'm not sure how the various EV-HV-Eco settings affect its operation. Sometimes the system steams up the windows, and sometimes it doesn't. I'm going to keep on experimenting to see if I can get it figured out. This video helped a little, so thanks for trying to simplify a very complex system.
I'm sure you know that Freon is banned in the U.S., so I assume you're using the brand name generically for whatever refrigerant fills the RAV4's tubes.
Would you recommend purchasing a 2021 vice New prime?
Wow! I love my Rav4 Prime, but this video made my head spin. Still, VERY good to know this. Now, I wish someone would explain the electrical system to me including: Normal operating mode; Room Mode; Accessory mode.
Great info! I would love to see a video on the electrical system. How the high and low voltage system interact and how robust the 12v system is for accessories
If your thinking about adding a big car stereo sub system, think again. You only get 125 amps on the 12v side. Most of that is already in use. Adding more load puts more stress on the power converter which is a very expensive part that might have its warranty void if YOU overload it.
Power inverters (the kind that output 120vac) demand MASSIVE amps off thee 12 volt system. 300 watts at 120vac is 30 amps off the 12 volt side. 1000 watts is 100 amps. 1500 watts is 150 amps. I think the fuse will pop at 125 amps directly off the battery posts.
I ran into 12v car battery charging issues quickly when I tried to pull too much juice in ready mode.
What the A/C switch does? Should I turn it off in winter? Or will it turn off heat pump too?
Great video! Do you know what the cooling capacity is of the A/C on the Rav4 Prime?
Could you please talk more about the cons in the Canadian cold temperature? I am now wondering if it is a right choice to buy this car or not. Please comment, thank you.
What coolant do these rav4 primes use? R1234YF?
All that to say if this system ever breaks, you better have good credit !
dude you need pentagon level budget if this system ever breaks down lol
prob cheaper than a tesla breakdown lol
Can you talk about the C-HR as well please. Great content as always 😀
Hi there, I have to charge a prime, that I bought with a damaged accumulator assembly. Do you have the procedure to fill with refrigerant? thank you
I have a Rav-4 Prime that I love, but during the cold when you start the heat, there is a very loud vibration that rocks the car. Videos are all over the internet, but every time I went to Toyota, they said they couldn’t replicate it. :(
Hi! I know exactly what you’re referring to. No resolution to this yet and nothing official yet but it could be a normal characteristic of the heat pump system. If I know more I’ll let you know in a video
I am experiencing the same R4P heat pump vibration issue. Where I live it is cold 6-7 months out of the year. Especially bad when leaving from a 50 degree heated garage and the temp is below 30.
Mine does this too. Then the hybrid system failed. It's at the dealer right now
I had this exact thing happen to my old Prius C when really cold…ok really cold in Los Angeles (upper 30’s 😅). Only happened twice. I shut off the car real fast and it didn’t do it again. It was a violent shaking.
Is this applicable for full hybrid ( like normal ) other than plug in hybrid?
When the Rav4 Prime is off and you don't have the charger plugged in, what are the possible normal noises you could hear from the car? My understanding is there is the EAVP test system that comes on periodically. Would any other fans come on by themselves during this off time? Also would the heating cooling come on to condition the battery or does that only occur when you are charging or have a departure schedule with the charge plugged in, or actually have the car on?
Can we use power from the grid to warm up the cabin, or does it use battery power even if it is plugged in ?
Damn, I didn't know about the 80k freon service. Shoots. Good to know.
THANK YOU SO MUCH FOR THIS VIDEO. MY 2021 RAV4 Prime 30k kms has a failed Pressure hose and I took it to the Dealer. The part is back ordered and they told me I could drive the car. I informed them the battery is indeed AC cooled (because of your video) and driving it could potentially damage it.
I will be selling the vehicle as soon as its repaired.
I'm an automotive service technician. I finally bought a Toyota because of their reliability....oops.
To be fair the dealership has been good so far and this is a new system for the technicians to learn.
Is the compressor electric only? Or it can take power from battery and belt ?
My new 2024 Rav4 Prime XSE Warranty and Maintenance Guide does not mention the AC service at 80,000 miles. In fact, I don't see anything about it at all there. Has this changed since the 2021 models? Do we still need to do that?
Please a question Does the heat pump also warms the traction battery??
My 2020 RAV4 is the Base Model. It's going to be interesting watching when the "PRIME" has problems. Especially intermittent problems.
AMD, here is a nightmare scenario for you,lol! Tomorrow you go into work and your first job is a Rav4 Prime with a leak in the HVAC system. You have to track the leak down. Hope your employer has a lot of leak detect dye and you have the patience of a saint! Its difficult enough to find a leak in a normal auto AC, can not imagine what it would be like to find a small leak in this system. The engineers that designed that system should be required to repair them.
Yea, I already thought about that. I've done almost all my own car repairs and maintainance (after exhausting included dealer work) since learning how to drive 40+ years ago but I draw the line at HVAC repairs and wheel alignment. This might be the reason why I buy a Toyota Extra Care extended warranty.
I have a couple of video ideas, we need a nav update video I can’t find any info for my 2018 prime, also I was wondering if it would be possible to put the new 2020 rear seat on my 18 prime great job on your videos keep up the good work
Is this system only on the Prime? Or are they on all Nav 4? Also, what about road noise on the highway, I have watched a lot of videos about this...........Doesn't seem to good a keeping road noise out. I am looking a 2022 Corolla SE or a Rav 4 LE...........
Thank you CCN. All this time I thought the Flux Capacitor was responsible for the heat.
Hi. I'm the lucky owner of the Rav4 Prime. My vehicle was imported from USA and local Toyota dealer in my country currently not have the similar cars for selling. My car needs the refrigerant refill as AC tube was damaged and now system is completely empty. I doubt that local Toyota dealership stuff will have the experience of the HVAC of PRIME model. Are there any differences of refilling the AC system with refrigerant specific to Rav4 PRIME model?
Thanks for the detailed explanation! Just wondering if the coolant needs to be vacuum filled, or can it be filled and burped as usual? I’m doing exactly what you wouldn’t recommend, which is rebuilding a RAV4 Prime that was in a front end collision 😬🤣
You need the scan tool to open all the valves to fill or purge.
Thanks for a great video and gratz on hitting 100k subscribers. I got a question. If I like to drive with windows open and A/C off. Does a computer kicks in HVAC to cool a battery or battery cooling only works when I operate HVAC from a dash board?
Hi! Thank you! The battery cooling can operate independently from the rest of the hvac functions
Great informative videos thanks for sharing you knowledge. I’m considering buying a RAV4 Prime and was wondering with all that stuff in the way how difficult is it to change the oil for a diy guy?
Hi! The oil change is very simple on these. It’s a spin on filter and one small cover with 4 screws exposes both the drain plug and oil filter
@@TheCarCareNut thanks for the reply, now I just have to find a RAV4 Prime to buy. I enjoy your videos keep up the good work!
I want a free rav4 prime :) problems solved lol
According to your diagram, if there is a small leakage anywhere at all, the car (or spaceship) is screwed :)
Great explanation, some what different to the Korean offerings, and a better explanation than the tech data 👍
Do you know if the ECO Mode on the RAV4 Prime plug ins drive Mode selector causing the heated seat to come on ?, owners manual says nothing about it
AMD, HVAC systems etc. have come a long way from the bad old days. When I started driving you could not even count on your car coming equipped with a rear defroster! :-(
Do you remember when AC was a dealer installed option? Guess they can’t do that with the RAV4 prime 😂
@@TheCarCareNut Yes I do, I was nearly 39 when I got my first car with AC!
This is really professional!!! Does a regular RAV4 hybrid have a similar system? I have a 2021 rav4 hybrid LE
correct me if I am wrong .At 8:04 when system should cool down the battery shouldn't the very bottom arrow facing opposite (both arrow are facing toward battery ).And also How does heating the battery work? thank you very much for sharing all the information.
Hi! Good catch! I was waiting for someone to see this. So this is one that is not clear and not published. But here’s the explanation that we got. It uses one line to supply and the other to return and flips back and forth as there’s a 3rd valve inside the battery. And the battery heater is electric just turns on and off by command of the computer
Hi, I have two questions please. I am considering to trade-in my 2021 RAV4 Limited to a RAV4 Prime due to increasing gas prices. Question 1: Should I do the trade-in or keep it for few years? Number 2 question: I live in Toronto, wherein we have frigid weather during winter time (may go below -25C or Winchill of -55C); and summertime (with 30C to 40C heat). My concern is with the heating or cooling the car during this frigid weathers. I hope to hear from you. Thank You.
Hi! Honestly in frigid weather the prime doesn’t do as well as most hope. Needing heat in that kind of weather will force the engine on and kinda defeats the purpose. A hybrid might be a better option but I wouldn’t trade in your RAV4 it’s too new and you’ll loose a lot more than the cost of gas savings
I understand how a heat pump works, and understood a lot of the general concepts discussed here, but the diagrams are not well drawn and are confusing. An example is the diragram at the 8:20 point it shows coolant flowing into the battery at upper and lower lines. I would expect one to be input and one to be output (even if flow is reversible it should be in one direction at one time) - the diagram does not make sense.
There are also many cases where the coolant appears to be allowed to flow in more than one path at the same time. This may well be the case, but there is no explanation how this works for the system heat transfer.
While most of The Car Care Nut videos are very good, I found that this one did little to explain how this system works.
Hi! The idea of this video is to give a general idea of how the thing works. I could do a full video of exact details of how it switches the flow inside the battery to use one line as supply and one line as return.
@@TheCarCareNut That would be great if you could do that kind of video! I am getting a RAV4 Prime in a couple months and I am trying to learn as much as I can about it - especially the technology that is real actively new for this model.
Very helpful video which made me determine to not get the Prime and stick with the regular hybrid. Regardless of how reliable the AC system might be, it sounds way too over engineered and bound to break at some point. I just don’t want an AC system issue to be a factor that prevents me from driving a car. Just seems silly to engineer it in that manner. And refilling the system every 80k miles = $$$$. You know those mechanics are going to charge a lot for 1234yf refrigerant and labor.
Thank you for the video!. Does the system need to be topped off at 80k miles because of a shaft seal leaking on the compressor (like the old days)? Or is it just a "just in case there's a leak" checkup?
It’s just in case there’s a small leak. Because of the battery cooling they want the system to always be at optimum performance
@@TheCarCareNut I assume the procedure is to pump it all out, and put it back in by weight? It would be very difficult to do it by gages right? its difficult to do any car by gages, but a R4P? OMG! no thanks. it is r134a still right?
Cool, thanks for sharing.
Heat pumps that do a liquid to liquid transfer of heat is nothing new. Water to Air heat pumps used in homes have been doing this for over 30 years.
They seem to suck in Indiana weather! I re-engineered quite a big of the parts of the r4p to allow it to safely burn gas automatically while still plugged in via an aftermarket high quality remote start.. That burn gas while plugged in was my hack. But now I loved my r4p. The heat pump is ok on cold days if the gas burn got thing hot first. So I can still enjoy EV driving in the winter. With a 100% battery level each time too since remote starting like this uses very little EV power.
Good video. I am sure it could be clarified a bit in rev2. I would start with the goals as you did but build that a bit so the audience knows that battery cooling changed from strictly air cooled to refrigerant conditioned. Second, while the Prius Prime video described the electric supplemental heating, the use of a quick abbreviation here did not help. In a similar manner I would explain that any refrigerant system does one thing - it transfers heat from one space to another. In AC mode its from the cabin to the outside. In Heat mode its from the outside to the cabin. It might be good enough to note that a heat pump system can switch directions. And advanced automotive heat pump systems work better than typical residential heat pumps because the advanced systems a) use variable capacity compressors that can run higher than 100% because b) they utilize a compressor overheating control known as hot gas bypass and c) because they utilize electronic metering devices instead of mechanical equivalents. Recently these advances have been become available in the highest end residential systems to allow full heating down to 5f. In a similar manner the advanced techniques in automotive applications provide usable heat to these very cold outside temps without relying on high wattage electric heating techniques which are obviously bad for a battery operated vehicle. Finally, understanding that a hybrid does have an engine that, when run, provides exceptional heat, requires some valves to take advantage of it. And an engine water coolant to refrigerant system heat exchanger to eliminate the extra coil inside. An interesting aside: Big buildings routinely use refrigerant to water heat exchangers in systems commonly known as chillers. Geothermal heat pumps used on buildings also use water to refrigerant heat exchangers. Where Toyota excels is when they incorporate industrial technology of twenty years ago (variable capacity heat pumps and water to refrigerant heat exchangers) into affordable and mobile automotive systems.
Great video! Is the A/C compressor used in the Prime used in other hybrids like the Camry / Venza? Or is the compressor exclusively used only in the Prime..
The compressor is different in the prime cars
Kind of unrelated, how long will the AC in the Rav4 prime run just on EV mode before engine turns on?
How to top off the refrigerant? Is it a DIY thing or does it need to be done by a professional mechanic?
Hi! Not a diy or even a conventional shop job. Needs a scan tool to open all the valves and correctly charge the system
Simply amazing!
Do you have to check the Freon on a hybrid too
Wonderful job you do here, much appreciated. Can you make a video how to vacumm and recharge ac on prius 2008?
How long are these AC heater systems good for. Sounds like a small fortune to repair them if you can find someone bright enough to do the work.
Hi AMD, my 2021 Camry hybrid came with Auto climate control-dual(no other option). How can I reduce the cooling in order to keep the compressor asleep as much as possible without triggering the the heater core door? (The control has SYNC knob). Trying to save gas, so l drive on ECO mode and the AC displays ECO.
You can turn off the AC completely if you don’t need it
I believe your battery cooling diagram may be wrong, I would think there should be a suction line return to the accumulator. From what I see your showing two liquid lines and two metering devices and no return of the boiled refrigerant. How can that be?
👍🦘 Very well explained, as a retired refrigeration tech I find this very interesting thanks.
Are their any 4Runners for sale at your dealership or others near you? We can't find much of anything for sale near Indy and have driven to all of them over and over.
None at the moment. You’re better off ordering one and waiting.
Really well done! Super job!
I have a 2021 Rav-4 Prime that I love, but during the cold when you start the heat, there is a very loud vibration that rocks the car. Videos are all over the internet, but every time I went to Toyota, they used the TSB which told them to rest the HVAC system which didn't work, then the 2nd TSB stated to replace a HVAC tubing and that didn't work. They compared my RAV4 Prime to another RAV4 Prime both cars have the same issue. They told me it must be normal, I told them it's something with the heat pump when there is cold weather. In the summer it doesn't have a problem. So it's documented with Toyota and in my records so if there is a problem down the line then Toyota can if it on their dime. Any suggestion on how to fit this would be much appreciated.
Mine does it too. Then the HVAC system failed last week. And service hybrid system take to Toyota. They are working on it now.
Toyota...got to love them...
Yikes, I was thinking of financing a Lexus NX 450h (which is based on the Prime), but all of these complications sounds like expensive repairs in the long term.
I think I’ll just lease
Or go with the NX Hybrid version which yields decent mpg but with proven technology as RAV4 hybrid
Watch the NX videos by popular TH-camrs who went to Texas. You'll hear them say the NX is going to be roughly 10 grand more EV range about 36. There's going to be a lot of people lining up to pay top dollar for the status of having the brand new Lexus NX hybrid plugin. Which is nothing more than a RAV4 lexified. I'm on my second Lexus I personally can't see the reason to spend 10 grand more for a badge and some extra comfort. Then again I have a 45 mile round trip commute. Food for thought. Variety is the spice of life.
@@kaizen108gmailcom thanks for the insight. Valuable perspective.
We got the extended warrantee, never used to but now the cars or so complicated.
@@benjamintucker9829 Yeah the more I see the interior of the NX - the more unappealing it is, the dash is just so bland and uninspiring. I don't like that the doors are electronic, either
Not only is it slower, more cramped and less fuel efficient than the RAV4 Prime - but you're paying more. Seems like a foolish choice, unless they revise the heck outta this thing
This video convinced me to get an extended warranty
me too. HVAC repair is inevitable, esp on one with so many fittings and valves. I bet labor alone would be $1000 to even do a simple repair on this system. Trying to find a leak has got to be a total nightmare,
Does it ever heat the battery in the winter?
Hi! It does but not using the heat pump system. It has an electric heater in the battery
I understand the system, but why not toyota use small electric heater on heavy duty mode just to help generate heat? Yes it will sacrifice battery. but its okay to borrow it for a while right?
Hi! It would be counter productive. The heater would consume too much and reduce the range
WOW 😲 I know i know it's progress, but WOW, I'm glad I'm not a technician
Does the PTC heater only work on ICE or there's a way to trigger it on EV mode to get more heat?
It has a PTC heater? Why then can't you enable remote climate when the temperature is below 14F?
At 8:20 the diagram shows coolant going into two inlets to the HV Battery but no outlet? I am confused
As always, enjoyed your video. I have a question about a 2017 4 runner. Is the 4 runner equipped with a" port" that can be used to install a brake controller for a travel trailer ? As always thank you very much. 🤓
Hi! It’s not something that’s readily available oem.
Great explanation. I was surprised to see the heat pump doesn't seem to be designed to warm up the battery. Lithium battery is a dead weight in low temperature isn't it ?
I think they use an electric battery heater for that?
Is It possible to replace some cells in the Prime's battery like in traditional hybrid? Can battery be opened at all?
Hi! It’s possible and the battery can be opened
@@TheCarCareNut Thank you very much for the answer. I've just crashed my Rav4 2019 so I consider to buy basic PHEV or top hybrid Rav4 again. Price is about same.
You tha man!!!! Another great video.
Complex YES! Effective on cold winter days? NO! This car as the worst heater in it I have ever owned. So bad in fact I added a remote starter to it. STILL SUCKS! It defaults to the heat pump mode which is pretty much no good at outdoor temps below +20F.
But I'm not the kind of guy to just accept it. I did something about it. i can now remote start my r4p and get it up to 100f cabin temp by forcing it to burn gas, even with the plug spout still inserted. i did it safely too, without hot wiring the car's safety checks for plug insertion.
i know the car-care-nut is not a fan of after market remote start devices, but i have a feeling even he would approve of how I pulled it off. His videos, like this one where very helpful.
Its not an easy install, or an easy fix. The car itself never sees it electronically. No computer interfaces at all. No bus tapping. No data at all. .
I'm tempted to send him one to see how challenged he would be with the install being the expert he is on HPEV's.
Loved your video on the xtool D7, also a great tool for this DYI project. Reach out to me if you want to do a video on it. careytreesh@gmail.com
Would the system be used to heat the battery at any point ?
No it only cools the battery. The heater for the battery is an electric one
@@TheCarCareNut
Thx
So why does the hvac system make a “clunk” sound on start-up in cool weather? I bought mine in March when it was still cold out and every morning as I drove out of the garage and turned on the heater it would make a loud clunk sound. And if you look online at forums this is a common occurrence. No such sound with the cooling side in summer.
Might be the blend door?
Hi! This would need in person diagnosis but it could be one of the motors that move the doors for the hvac air routing
Does Prius prime also need refrigerant top of at 80k miles?
Hi! It doesn’t as the Prius prime doesn’t use the refrigerant to cool the battery
Hey Amd, my wife has an 2011 Lexus CT200h, she took it to get the oil changed yesterday and on her way back she got a check hybrid system message and it stopped accelerating, they also topped off her coolant and changed the filter in the dash. Any advise would be appreciated. Thanks
Hi! I would take it back. It could be many things hard for me to tell without getting codes.
for sienna 2012 awd v6, how many mileage the oem brake rotor should last? thx
Hi! Hard to put it in miles because it depends on use. But generally if the conditions are ideal you can resurface the rotors possibly twice
How does the "Eco" climate button change things based on what you explained in this video?
что-то не пойму, система кондиционирования воздуха салона используется для охлаждения-нагрева высоковольтной батареи?
Hi. I disconnected the air tube on my Toyota 21 CHR that sits above the radiator and now I have a check engine light. Will it clear over time? I was changing the horn.
Use a code reader to read the codes and erase them. They will eventually clear but will take some time
Thank you for your response. Although this is not relative to this particular topic, One of your recent videos describes Toyota prep before its sold to a buyer. Low and behold The 2021 CHR was delivered to my nephew sprung an oil leak. At 1000 miles The oil fill cap fell off and wet the entire front of the engine and surrounding area. He only realized something was amiss because of burning oil on the exhaust. He was able to add oil to the marked level. What is his recourse with Toyota dealer here in Queens NY? They obviously left the cap loose.
Although things happen but that’s not something you want to happen on a new car! I would have them clean up the mess at least
Already had issues, it is not providing any cold air in the cabin above +22C (71F) (same for cold conditions under 0C (32F), no warm air). Got it checked, not low on freon, they performed a A/C service, still not better. Any thoughts?
No reports of issues on my side yet. They’ll need to look into it at the dealership
Same
Thank you AMD for nice video. Less is more.😉
Can you do one for Camry Hybrid heating / cooling system ?
Looking for Lexus RX 350 what year’s are most reliable.? Thank you
Hi! Most of them are. They really haven’t changed much drivetrain wise for a while.
The Canadian built RX 350s are great. Look at the Carfax. Low mileage Plus did least amount of owners and no accidents. That's the most popular Lexus being sold for years. Good luck Happy Hunting
Since heat is sent in the cabin by the coolant, does it mean that adding a ~600CAD "premium plug-in block heater" would allow or significantly enhance HVAC heating under 10F ?
The block heater will need continuous power to work as soon as you turn it off the heat will be consumed rapidly and not replenished. Also the system by software won’t even operate below 14 F so it would just turn on the engine to keep the heat going
@@TheCarCareNut Thank you!
@@TheCarCareNut That block heater is not a bad idea tho. If a large section of the coolant is kept hot by the heater, and the car was started quickly after it was unplugged, Id think you might get heat much faster then normal even on a mild day.
Its simple
Im not touching the temp dial. Thats where it all starts to get complicated. hahahahah
Great video.
Thanks