ColinBarber

No I don't think AWD makes a difference. Unless you move the seat completely forwards/backwards and cut the carpet as close as possible to the connector I don't think you have an option other than to remove the seat and lift the carpet.

Correct. When you lightly press the brakes you will see the power meter needle go down indicating regenerative braking (grey area on diagram). If you apply more pressure the needle will max out and all extra effort is provided by the mechanical brakes - it doesn't switch from one to the other, it will provide more force with the addition of mechanical brakes, and it can apply those and modulate the force in a fraction of a second. As the generation of electricity from the motor/generator is related to speed, the amount of braking force felt is less a higher speed, hence the curve. The motor itself can generate more power than the batteries can cope with being charged so the drop off curve is quite steep. If you have a full battery, or the batteries are too hot, the regen braking force is much less than the graph. Some people do complain about the brake feel, and that if you gradually apply more pressure you can feel when the mechanical brakes take on most of the work. On the 400h I find it very subtle though. It is more pronounced if the mechanical brakes haven't been bled correctly, or non-standard discs/pads are used as their initial grab may be different to OEM. At the very left of the graph you will see all white. At speeds around 5 mph or lower, all braking is mechanical - this is something you can sometimes feel, as you slow to a stop, where is does switch from one method to the other. As you say, it is better to drive two or three so you understand what is normal and what isn't.

Welcome Luke

Yes this is by design to make sure you can see the screen split. On the 2015 NAV it is a very solid blue curved line, a bit more subtle on the 2017 NAV system.

The only thing I can suggest is to measure the resistance of the motors before you connect the ECU, if you have a wiring diagram or can trace them to the motors.

I'd say you are correct, the heater core is partially blocked. I think you do need to dismantle quite a bit to get it out so I would try reverse flushing it first. Find the pipes on the engine bay bulkhead and determine which is the feed and which is the return - the feed should be much hotter. Disconnect them and put a hose pipe on the return and flush it out for 10 minutes. If this is the cause then I'd suggest that Toyota coolant hasn't always been used and changed at the correct intervals. Is the engine temperature correct? The gauge should be a fraction under half - if you have a thermostat issue and the engine is running too cool then you may not get the heat you expect in the cabin.

Must be MK2 for GS430

GWS191 is the chassis code for the GS450h (series III). In the US they always call their vehicles in the second half of the year the next year, hence you see 2007 rather than 2006. Looking at toyodiy.com is seems the same discs where used throughout the production of the series III 450h.

Just be careful. If a shorted motor blew the control board it could do the same to the new one.

All Toyota hybrids operate that way. There should be no delay. If you apply high pressure the mechanical brakes operate straightaway.

Hi Barrie Yes, that looks like sunlight getting through the red filter so you are able to see the unlit fluorescent segments of the display. Nothing to worry about, this isn't an error code.

I've never heard of a Toyota/Lexus not needing their standard torque setting: 103 Nm (76 ft-lbf)

I think you are calling quite a lot of people on these forums daft. Especially as you will get a 1 year hybrid battery warranty with a service for vehicles up to 10 years old. Also the Lexus extended warranty is excellent, but with the caveat that it has to be services at a Lexus dealer. I'd agree that for a 2005 vehicle it isn't really cost effective to have major work done, such as a cam belt or water pump replacement, at a main dealer.

Lexus won't do ECU updates unless they are trying to fix a specific issue documented in a Technical Service Bulletin.

It is certainly possible to get a facelift model in your budget but likely to be a lower grade. The Advance grade is good value, unless you are looking for a leather interior. Nothing the worry about on the pre facelift models, but lots of minor changes on the newer ones. https://usedcars.lexus.co.uk/en/used-lexus/Lexus/CT-200h/18-Advance-vdbl34t https://usedcars.lexus.co.uk/en/used-lexus/Lexus/CT-200h-Advance/18-Advance-s4bmjzp

2 steps forward, 1 back. Hopefully everything will be good once you get the new sensor.

I'm not sure this really helps but here is a diagram of the system. m_ac_0024.pdf

Cars up for sale often end up with flat batteries which is the cause for a re-calibration

I don't believe these are individually fused, each has a direct connection back to the semiconductor power integration ECU. I'd suspect the wiring and/or LED light unit itself.

It's the same for the 400h. The counter argument is that there really isn't a need to replace items before they show signs of wear and the pump could last another 30k+ miles. Even when replaced at the same time, the cost for the water pump is close to £300 at a Lexus dealer.

Good that it is working but without knowing the issue there will always be doubt as to whether the issue is fixed or not. It could have been a poor connector to a sensor but the plugs are normally very reliable. You may have to just see how it goes and hope an error code is stored if the fault occurs again to help narrow down the problem area.

Battery prices are all over the place on the web - ranging from £1k to £6k, depending on exchange refunds etc. Second hand ones go for around £600 on eBay. You would never purchase a new one from Lexus - just get the individual cells replaced by an independent.

Welcome Neil. Some people change the water pump, others don't if it isn't showing signs of wear - it isn't part of the schedule maintenance schedule. It sounds like the one you went to see was a little tired. I'm sure there are better examples out there. They can suffer from corrosion on the underside so check that if you can.

Worth keeping an eye on eBay but these things were rare 10 years ago, now they are almost impossible to find.