oh what now...

So you have an 09 that has an 08 drivetrain and now you have the brake codes?

 

i was just reading a guy's response on cars .. about who should have a hybrid and who should have a non-hybrid ..
people on a budget he said should have a non-hybrid ... like a camry, corolla, etc. because the systems are simple and so are the repair and the costliness and prob. timeliness of the repairs dont take the travel factor so much out of your life ... (while its being fixed ) ...
if i had had several medical procedures and wwas a bit sickly and low on energy (is that fybromyalgae?) then i would have to say i shouldnt be having a hybrid car for the reasons stated previously. 3 cents.
(i beleive this is more related to an ---old--- prius ... a newer of anything is going to be good for 50000 miles no problem ... a 10 year old car with over 100k miles is going to be a pita for anyone esp. physical maladies)

 

C1259 and C1310 are usually generated when the HV system is not functioning properly, either because the HV battery or ECU has gone bad. If you weren't able to get Techstream working, how are you reading the codes? Possibly the device you are using is not reporting all of the codes that are being thrown. Dr. Prius is probably the best substitute if you can't get Techstream to work. It can give you information about your HV battery, which I suspect is the real problem. You say you replaced the HV battery and the 12V. Was the HV battery a new battery from a Toyota dealer or a refurbished one? Even if the 12V is new, it is best to get a voltage reading with a multi meter at the front jump points to make sure it is not part of the problem.

 

Welcome to PriusChat!!

This link has numerous techstream related posts, including some with step-by-step installation instructions and pictures.

https://blog.obdii365.com/tag/toyota-techstream/

Which OS are you attempting to install on?

 

What version Techstream? 14 or 15?

Do you get a character stream similar to this
0087937893F6EE368D5F42CA6A543A01

 

I can't speak to the rest of it, but if the key isn't working to unlock the doors it might just be a dead/weak battery in the fob.

 

You haven't listed any codes from the hybrid system. That's a problem, because you have C1259 and C1310, which are brake ECU codes that only mean "brake ECU is passing along that there are codes in the hybrid system". (davecook89t mentioned that a year ago, but it might have been overlooked.)

So, to find out what's going on there, you really need access to a scan tool that can tell you what the hybrid system codes are. The C1259 and C1310 by themselves aren't the information you need.

C1345 is simply a code telling you the brake system needs to go through its linear solenoid calibration procedure. There's an operation in Techstream for doing that. That's a step that will always need to be done after replacing the brake actuator or skid ECU, both of which I'm seeing in your last post.

C1203 is a slightly weirder code. In general, it means the skid ECU doesn't feel at home with the information it is getting from the engine and HV ECUs. I've seen it come up in other threads where a skid ECU is transplanted from another car, but it doesn't seem to be always. Anyway, the workup section for it in the repair manual says to be sure to take care of the C1345 first.

If the only two original codes were C1259 and C1310 as seen in post #1, which (as explained) don't indicate brake issues at all, then all of that replacement of brake parts and skid ECU was originally unnecessary, and the C1203 and C1345 appear to be self-inflicted consequences of that unnecessary work. I'm sorry to say that; it makes all too good an example of how important it is for someone to look up the codes in the correct repair manual for the car and understand what they mean before taking some action.

I guess we also need more posts explaining that C1310 on a Prius has nothing whatever to do with any "active booster solenoid", to increase the chance of people learning that in a search. All C1 codes are "manufacturer defined", which is to say they can mean completely different things from one make or model of car to the next, and the "booster solenoid" nonsense surely is right for what C1310 means in some totally different car, but has nothing to do with a Prius. Seeing it in any post about a Prius with a C1310 is a sure sign of somebody Googling for the code, or reading it off a generic scan tool, and not looking it up in the repair manual, where the correct info is found.