I live in a very hot and humid climate. Even after cleaning the battery fan I’m still experiencing some sluggish acceleration. I was wondering if getting a ODB2 Plug in scanner and manually increasing the battery fan speeds is safe? And will it help with the cars performance?
Yes your air conditioner should be on most of the year around down in Texas so make sure it works and it's kept up to snuff that's almost important as gas in the car.
It won’t help sluggish acceleration. If your hv battery is so weak it hurts acceleration you should see it as low charge level on the display.
I agree that it's not going to do much for you performance wise, but check out the Hybrid Assistant app if you have an android. It's no longer supported, but it's a very nice monitoring app that allows you some fan control. CarScanner for IOS has customization features that I believe would allow you to do this as well, but someone smarter than me needs to figure it out. I can get the fan to run a custom speed for a second, but it needs a way to run continuously at that speed and I could never figure that out.
The car continuously varies the fan speed so an app has to continuously overwrite it to get a higher fan speed. Dr Prius can continuously overwrite fan speed if left connected to the obd2 with the app up. Best to ensure the intake and fan squirrel cage blower is clean which will keep the battery cooler. On very hot days you want to use AC since the cabin air is used by the battery fan. The weather this spring in Central Texas has been cool and is not hot enough to cause a normal hv battery issues. In the end sluggish acceleration which is worse than normal is typically caused by a weak hv battery. A weak hv battery will discharge quickly, sometimes while waiting at a stop light. It will discharge more than when it’s in good shape and is unable to add much hp to the initial acceleration. A clogged catalytic converter from oil burning could also affect power. This is rare and normally would have coded with P0420 before it got to that point. A weak hv battery is common on a 12 year old Prius.
That's what I'm saying. If someone could figure out how to continuously run (overwrite) the fan speed control for CarScanner we'd have an IOS option for fan speed that's not Dr. Prius, which doesn't really do much else (unlike Hybrid Assistant and CarScanner which are capable of also showing other useful info like coolant temp etc.).
You would have to request the developers of Car Scanner to add it as a custom feature. Normally writes are a one time thing in a bidirectional scanner. Which Car scanner is not.
