C1259 C1310 Brake system.

I think some people follow me on here......to see what crazy thing I'll say next.... lets see what happens
you can get tech/stream and the cable on amazon... pretty cheap

 

C1259 and C1310 codes from the brake system you can find described here:

Blink (a/k/a Flash) Codes – How to. | PriusChat

"Neither code means any problem with the brake system at all: they both tell you about some problem elsewhere in the car (in the hybrid powertrain control) that the brake system just needs to know about (because those systems cooperate to do regeneration). So these codes just mean you need to get the codes that really matter, from the ECUs controlling the hybrid system. (Sadly, that means you do need to arrange access to a scan tool, because those ECUs don't do blink codes.)"

 

If C1259 and C1310 are the only brake system codes you have, you are not looking for a brake system issue at all, and there is nothing the brake system needs done.

Those codes are nothing but the brake system telling you there are other trouble codes not in the brake system, but being reported by the power management control ECU, and you find what the real issue is by finding out what those codes are, using a scan tool that is capable of reading them.

 

A good capable scanner is the Autel AP200. You buy it on Amazon or eBay for about $60 and load the app on your phone or tablet. Take a look at this thread : https://priuschat.com/index.php?posts/3290690

 

Lights indicate there are trouble codes, and trouble codes indicate there are troubles, so it is never a surprise if the codes and lights come back after clearing, if the troubles haven't been fixed. Sometimes they return immediately, sometimes after moments, or hours, or weeks, or months, depending on the methods the car uses to detect different kinds of trouble.

Because your brake booster has been telling you about problems with the hybrid system, it must not be totally isolated from communication: it had to learn of the hybrid system troubles somehow. In any case, failure to connect to it with a scan tool would make one start off suspicious of all the connections that might have been disturbed during the replacement; I'd probably look carefully at those before being completely sure the unit itself is bad.

 

was the replacement booster the same part number..... as the original unit?

 

Not sure why you didn't get techstream and cable from Amazon. Would have saved you $300.

 

Different people might have different opinions on hacked bootleg software, for starters, and even among people with no objection to that, they may have different pain thresholds for getting the poorly-documented bootlegs successfully installed and working.

 

Or let toy rip you off............... and their very poor gen 3 engineering.....
Get a non hybrid toy and it last 15 years..... get a gen 3 and pay the price

 

Toy will let you use a bona fide, non-bootleg Techstream and work on your own issue for $70 for a two-day activation, which usually beats a dealer visit by a lot:

• it's less to start with than the dealer diagnostic charge
• you can work where you are without the hassle of getting the car to the dealer
• it's less by a lot if you end up changing things and using the software repeatedly over the two days.

Still, even that has setup effort and learning curve, and their online payment system has gotta be the clunkiest I've ever used.

 

Creative solution. Is the controller/servo unit a separate part number, or supposedly integral to the booster?

 

Not really clear what goes bad. The NHTSA investigation was interested in the valves, which seemed reasonable, given they do more than the gaskets, and could conceivably get worn or move sluggishly.

There's at least one business mentioned on PriusChat that offers rebuilt units (or to rebuild yours if you send it), so by implication they have learned something about what goes wrong and how to correct it, but they're not telling.