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Actually, I didn't find this as interesting as I hoped. There may be more to it, but to me this just seems a complicated way of saying they measure temperature inside and out, plus heat from sun, then adjust airflow temperature, speed and direction accordingly. I'm not sure that this is a big step forward in car aircon but I'm probably missing something. A genuine big next step for car air conditioning would be to take into account how hot the driver and passengers are feeling. A sensor to measure their forehead temperatures could feed data to the aircon system and increase or decrease airflow and temperature accordingly. (Maybe this has already be developed.) As an added benefit it could also tell you if you've got coronavirus. (The microphone would have been counting how often you cough). If the car comes up with a positive diagnosis, the windows would close and the doors would lock and the hazard lights would flash until soldiers dressed in hazmat suits arrived to take you away to an isolation unit.

I thought that air con systems had other o rings / seals in the pipework and connectors that could dry out unless the air con is run regularly for the oil in the gas to circulate around the whole system? - Must say on all the cars I've owned with air con climate control I have always left it on auto permanently anyway and let it do its own thing - I've paid for climate control so might as well use it to the full...!

doing a bit of research on other forums, it seems this engine is known for a single coil pack producing misfires across multiple cylinders, so you should concentrate on the one showing the most misfires. Not sure if the others are actual misfires or just the ECU detecting the misfire at a point in time where another cylinder is due for firing and therefore it triggers against the wrong cylinder - I suspect the latter.

The compressor in the hybrid Toyota/Lexus vehicles is a sealed unit much like you fridge or freezer. However it is a scroll compressor directly driven by a 3 phase AC variable speed motor immersed in the same oil, and gas as the compressor so there is no need for a rotary seal. The oil, and gas help cool the motor, and this is why the oil used in the AC system is very specific as it must also have high voltage electrical insulation properties. The oil is designated ND11. Normal AC systems use PAG oil, but this oil is conductive to electricity, and under no circumstances should it "or even equipment contaminated with it" be used to refill the AC system. If the AC system does become contaminated with even a small amount of PAG oil a ground fault will occur in the motor perhaps weeks or months later. This will force a high voltage leak code, and shut down the car completely for safety reasons. John.

Perfect thanks, will give it a go, I'd rather pay for something that's actually going to work.

A few months ago one of the members on here took their RX400h to Halfords for a re-gas of the AC and they just used one of the small cans they stock on the shelves rather than a proper machine. It caused all sorts of problems and the topic ran to about 6 or 7 pages if I remember correctly - I've had too much beer since then so things are a bit hazy and you should look it up for yourselves if anyone's interested in the whole sorry saga.

That is basically what's happening with my '82 Datsun Laurel. I'm having to either fabricate replacement bits or find close match with adjacent models of that period. I have had some success with BeForward where Amayama had failed. They are basically an online broker for parts breakers in Japan. For more recognised models like my R31 Skyline (and I'd imagine the Celsior too), Yahoo auctions Japan was also a good source for obscure parts.

According the service history, this air filter was last replaced in 2005, 41,000 miles ago! I must remember not to buy any more cars from my friend! I also replaced the auxilliary drive belt, which turned out to be pretty straightforward, albeit a little bit fiddly getting the new belt in place and seated correctly. This is my Heath Robinson arrangement to counteract the tensioner, although it made life easier to remove it when installing new belt, and then reapply it to enable fitment onto the upper idler pulley: A trim removal tool came in handy for getting the old belt off: I was pleasantly surprised to find there was no need to fiddle the belt around the fan, as is so often the case with other cars I have worked on. The old belt looked fine, so I'll keep it as spare. However, I did notice the length of the belt I took off was 2228, whereas the replacement is 2245, but this proved not to be an issue. From what I have read online the engine seems to accomodate a range of belt lengths, within reason, without a problem. I must say the more I work on this car the more I like it, so hopefully I'll get to drive it some day!

Best to pull the sliding pins out and re-grease every 30k miles/3 years to avoid this, maybe even every two years after you have done it the first time when the vehicle is three years old. Not sure why Lexus don't add it to their service schedule - affects all Toyota vehicles that use the sliding calliper design - other than they probably make too much revenue selling new callipers/carriers from all the vehicles with seized ones. One good thing about the GS and LS - they don't use this brake design.

thanks all for your help........great forum long live the lexus 🙂

Same here totally agree with you Herbie👍

Exactly what Colin says, but just to add that you can basically use almost any 12V source just to keep the settings while you change the battery. When you park the car up for the night it may take a couple of hours for it to 'go to sleep' as it were, but when it does there will be a quiescent current drain of somewhere in the region of 36mA to 50mA being supplied by the battery to power the alarm, the radio presets and maybe other stuff too. Given that you want to change the battery you'll have the tailgate open at the very least, which would switch the interior lights on. As long as you manually switch them off (because they would probably be the biggest current drain), you could even use a battery pack with 8 AA alkaline batteries like the one pictured below and that would happily keep all settings alive while you change the car battery, with plenty of current to spare (typical AA Alkaline batteries rated at 2800mA) - but better to do it quickly 'just in case'

This is the stuff I learn that I am glad to learn, but wish I didn't know. It scares me to death that it's so easy to damage things. I don't use main dealers for servicing and wonder how commonplace knowledge like this is. Probably not very.

I did a front to rear service on my wife's 2006 Aygo today at 76,000 miles. I stripped the brakes front, and rear, changed the oil, and filter, changed the air filter, plugs, AC filter, flushed the brake fluid, changed the gear oil, and reset the clutch adjustment with Techstream "MMT version automatic". Things were so easy to do, and there being no problems what so ever I was finished by lunch time. This car amazes me as after 14 years everything on the car still looks near new, and works. I then decided as I was on a roll I would change the plugs on the GS450H. This turned out to be easier than at first it seemed. A couple of the plugs were alarmingly tight even after they started to turn, but a little WD40 down the plug holes, and turning back, and forth soon got them freed. After removal they still look in very good condition with the gap still well within tolerance, and virtually no carbon build up. I do not know how many miles they have done. I have done 60,000 miles in the car, and have never changed them. They were still fit for many more miles. Next job is the engine coolant pump, and antifreeze change then engine oil "with 0w16 oil", and filter. When this is completed If I can manage lying on the ground I am going to change the transmission oil pump bearings. John.

Absolutely. Very sophisticated. Just not sure it's using a neural network in its usual meaning.

I agree William, I think it's a grandiose term for something that's not really what I understand as a learning neural net. It does though show how relatively complicated it is to control an a/c system. I do believe that the monitoring of driver/passenger temperature has been implemented, just cannot recall which marque it was. I think the 'neural network' in the Lexus is trying to account for how individuals experience temperature depending on environment. Clever stuff all the same..

A couple of excerpts From this doc. Air Con System Description.pdf

Chances are the won't and furthermore the spring rating would be wrong even if they did fit, so no point taking the risk

Even if they were to fit, would they be the correct spring rate for the IS200?

Many thanks for the explanation. I didn't realise there was no need to run the air conditioning regularly when the compressor is electric, unlike in conventional cars. That means I can turn it off for part of the year and save some fuel!

If you have a laptop then your best bet is to get a miniVCI cable from eBay or Amazon. These almost invariably come with a pirated copy of Techstream, which is the official diagnostic software that Toyota/Lexus technicians use in main dealer workshops. Alternatively, you can legitimately download a free copy of the software from here https://www.toyota-tech.eu/GTS/Wizard/Step5-Software.aspx and pay for a block of time to use it here. Of course, I'm not condoning the use of pirated software, that's a matter for your own conscience, but either way you'll need that miniVCI cable anyway so that the car and the laptop can talk to each other.

I'm quite sure that ingenuity will not be short when it comes to you thinking hard about substituting the existing for a completely different set-up from a more modern and available model / marque .................. these cars cannot simply be " gone " for the sake of a windscreen wash arrangement that's a little " out of the box " your ingenuity will prevail for sure Malc

I just Googled and found these https://www.google.com/search?client=safari&rls=en&q=coffee+off+a+laptop+screen+please%3F&ie=UTF-8&oe=UTF-8 Not read any, don't know if they're any good or not.

I have one, but she takes all day, she's a Slovac!

Are you saying that using the AC even when the car is in "Ready" is draining the 12V battery, John? Or, is the cabin fan only powered by the 12V battery? And, that there are no seals to seize up in the Is300h?

Good luck in your search and hope you find something nice

Ive bought the denso ones from ECP and tbh they're no different to the ones fitted from factory Worked out cheaper than buying the refills too

Thank you, I will!!

just swap coil pack 2 and 6 to see if the fault moves.

@SH20 I can recommend the Gyeon silk drying towel, it's a fantastic thing and very gentle on the paintwork. This was my NX after a good clean about a month ago.

Will do Jeff, I've just ordered a cordless hand held blower with a nozzle air speed of 150mph to initially blow the bulk of the rinse water off the car after future washes. Going forward I want to minimise contact with the paint and revert to minimum hand drying with high quality drying towels. This will keep swirls and micro scratches to a minimum I hope.

Finally got around to cleaning it, looks amazing! I really should do it more often...

your car looks a nice one, well done the 2019 MOT, did you make sure the rust issue mentioned wasn't relevant or sensibly sorted out then ! Malc

After a full term as a police officer I think that the policing in certain areas leaves much to be desired. Always any crime with a home Invasion especially a domestic burglary at night(to steal the transponder) immediately attracted a hefty prison sentence. This is not a victimless crime. Cheltenham race week night shift would involve recording the registration numbers of every car in every hotel and public car park resulting in recovery of quite a few stolen cars and cars used by travelling criminals and some very good arrests. Often these high performance stolen cars are used in serious crime by ruthless criminals. The trouble is the 'Snowflake' Police would rather prosecute 'Facebook' crime because its easy to get good detection rates and we all know that modern society loves a good graph or spreadsheet A lack of resources is trotted out as an excuse but the police deal with far less onerous tasks today than 40 or even 15 years ago. When did you last see a Blunkett Bobby on the beat. In my area probably not for at least 5 years, but you see them pretending to be real police in pairs in vehicles all the time..... Rant over. 🌼🌼🌼

I'm really sorry to hear this, as a coppers son I lament the passing of the days when law and order consisted of a good slap to an errant youngster and the fear it instilled, followed by a bloody good punch to the adult who hadn't learned earlier. I don't care what anybody says, the country has gone to hell in a hand cart. Nobody fears the law or retribution these days. Why should we live in fear of sub normal troggs and genetically challenged bastards? If this upsets any "social experiment Liberals" then so be it, you've created hell on Earth.

Problem is the slide pins on said calipers, they do need regular ( ideally every 6 months) maintainance to keep them free moving but alas this is not a detailed item in any service schedule so it is a case of 'When and Not if' unless you state specifically to have it done at service time or do it yourself.