Looks like Inverter problems

u should try a inverter coolant change see if helps to remedy the issue

 

Shouldn't this be covered under warranty?

 

sometimes there more air inside the system run the pump and shut it off and bleed it out, keep trying i got the same issue with two of my prius's 05 and a 01 .

 

Did you get from the dealer what DTC's were coming out?

Certainly don't want you to experience the frustration of replacing an inverter and find out it is an inverter cooling problem.

 

Salvaged cars are included in the emission control warranty, according to the manual. In CA states it is 15/150 if I remember right. The inverter is one of the covered items. Of course if the inverter was previously damaged in an accident then that would make them question. Good luck.

 

When hobbit was doing an inverter examination (http://techno-fandom.org/~hobbit/cars/ginv/), one thing he noticed was some gunk in the inverter cooling channels. Take a look yourself at his work. If your dealer is claiming an inverter cooling problem, then there should be some way to see what the flow is. The rest is physics and "physics" is not broken. Take a picture to the dealer of hobbits inverter picture (assuming he did this to help people like you). Ask "Anyway to remove crud like this?" can only lure the dealer into getting the smart technician involved. You want the smart technician.

I may be wrong, but the flow should be measurable if the car is running. Looking at the NHW11 service manual, there is a water temperature switch that closes between 118 to 131 F. It looks like this temp switch turns on the radiator fans. The rest of the design is a pump and a radiator.

If nothing else, make sure the radiator fans work and that the inverter cooling fluid flows.

 

If the engine running initiates the inverter cooling pump ........you can run the engine by putting the engine in drive and stepping on accelerator (and proceed to drive right thru the garage door) Seriously, keep foot on footbrake, set emergency brake and THEN step on accelerator. The RPM will be limited by the computer and will cease when the computer is satisfied with charge. You may or should have a green battery at that point, I assume then, the inverter pump can be bled. Leave some items on, like lights and AC and charge should bleed down and then you can start a new cycle. If I'm totally wrong let me know ( on the concept ) Not ever having bled the pump I would be interested in the details, location, etc. Andy

 

Hi Andy,

The original posts date back to July 2007. However, to answer your query, the inverter coolant pump runs whenever the car is either IG-ON or READY; hence no need to force the ICE to run. The pump is near the driver's side headlight.

I suggest you download repair manual info from techinfo.toyota.com when/if you decide to perform this procedure. It is quite time-consuming.

 

That's funny I did not even look at the date, no not planning to work in that area, just gathering knowledge. Thanks Pat.