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- เผยแพร่เมื่อ 9 ก.พ. 2025
- This video shows how to inspect the coolant flow in the inverter coolant reservoir for a Toyota Camry Highlander, Venza RAV4 or any other Toyota equipped with an A25A-FXS hybrid engine.
using a suction syringe, remove some of the coolant out of the reservoir to the level between the upper hose and the lower hose. start the car on EV mode to activate the pump and watch the coolant flowing out of the top hose. and that confirms that the inverter coolant pump is working, because the sound of the pump by itself does not confirm that it's doing enough circulation. in NEWER Toyota hybrid models, it is hard to see the turbulence inside the reservoir comparing to the older Toyota Hybrid models.
using a suction syringe, remove some of the coolant out of the reservoir to the level between the upper hose and the lower hose. start the car on EV mode to activate the pump and watch the coolant flowing out of the top hose. and that confirms that the inverter coolant pump is working, because the sound of the pump by itself does not confirm that it's doing enough circulation. in NEWER Toyota hybrid models, it is hard to see the turbulence inside the reservoir comparing to the older Toyota Hybrid models.
When you flushed it out and filled the tank and start the engine, did it immediately drop down that you would need to add more coolant? Because I have 2022 Toyota Camry hybrid, and when i started the engine, it didn’t drop down. The most I added was 2/3 of an inch over time. To make it full. But it didn’t drop down like a few inches down. Is that normal?
@@ehsanull If you drain it by removing the bottom pit cock and let it completely drain, it'll drop around an inch or two. What I do, is to refill it one inch above the full line, and when I start the car, it drops slightly under the full line, then I add coolant up to the full line. One extra inch above the line is good enough since it's not going to reach down to the level of the bottom hose.
@ yes I drained it from pit cock, it got out a lot of coolant, the only concern I have is when I filled the tank up, and start the engine, I was expecting it drop down a lot and I would immediately add more coolant again. So is it normal?
That's normal, even if the level is above the FULL line. The inverter cooling circulation is very basic, and it does not get very hot and expand like the engine side. The only problem is if you run the car with an empty inverter coolant reservoir, or the level goes near or below the lower hose. The lower hose then will suck air instead of coolant. Other than that, you're fine.