❗️ and no codes

No codes with what this is an '02 car you've had for a while and you know you have a capable scanner that can read the codes in this car or this is something you recently got and were told the battery was replaced at some point and it's life and so on? This is important If you know you have a capable scanner I would think you would be having some hybrid battery codes It looks like number 16 there's not looking too good looks like this reading was taken right after the car was shut off or something like that you're running 297 volts I think. You're like 56% state of charge that's questionable that I have to see you charge go up and down and see what's happening but something doesn't look right If you don't know about your scannings situation I'm thinking you may need a better scanner and look at some freeze frame data.

 

There are codes to recover, but Dr. Prius doesn't know how to ask for them.

Dr. Prius is great for showing you battery details, but it's useless for diagnosing some other parts of the car. So when Dr. Prius says 'no codes' all it really means is that the problem is probably not your hybrid battery.

Toyota Techstream (windows software) or Autel AP200 or AP2500 (smartphone app with bluetooth dongle) are scanners that let you check on every system in the car.

 

Your AC issue turning on and off could be as simple as using ships to change the clutch gap. It's a common issue with a cheap, easy fix. You can find many threads here describing the symptoms and repair. You should also check your refrigerant level by the sight glass in the line. If you see cloudiness, you need refrigerant. Of course, you could need refrig because you have a leak so maybe add leakspotter refrig.

 

Only the gen 1 Prius (2001 to 2003) had the mechanical A/C clutch adjustable with shims though. Starting with gen 2 (2004), the compressor is electrical.

 

OP said it's a 2002

 

One DrPrius screenshot doesn't really tell the whole story. But 297 volts is pretty darn high. What the graph look like when the SOC is near it's lowest typical point? And how long does it take to charge back up to full from that low SOC point.

 

I didn't get much out of the app on my Gen1. IIRC, it only showed me a demo vid without a subscription, and it didn't work on the G1 CAN, so I didn't get a subscription. But, it's been awhile.

 

I agree that one screen will not show an objective picture, but in the 16th pair of modules there are already problems.
It is significantly lower than the neighboring ones.
This is the basis for an error.
The second important note is that Dr. Prius shows Delta SOC 26%.
It indicates too much difference between the battery elements. It should not be like this.
This is bad.

 

Having the gen 1 forum be a subforum of gen 2 continues to throw me sometimes, even after all this time. I glance upward and see "Gen 2 (2004-2009) Toyota Prius Forums ...". Sorry.

 

Ignore my post above....
I don't know what Gen 1 specs are supposed to look like, brand new or otherwise. I was thinking Gen 2 Prius in my post above.

thanks @ronlewis

 

Yeah, one difference is the gen 1's 274-volt battery, compared to the 202-volt one in gen 2. Changes the 'normal' voltage readings you expect to see.