2004 Prius Error Code Help!

Hello!

I had posted here about issues I am experiencing with my key fobs on my current 2004 Prius. The issue is that I am unable to unlock and lock the car via the SKS Remote, and I am only able to turn on the car via inputting one of the fobs into the slot to turn on the car.

I had visited the Toyota Dealer and also tried my VCI cable to get more details to resolving the issue. Originally the dealership diagnosed this as a reprogramming issue, quoting me $118 plus tax. Instead, they found out that the "Smart Key ECU to Immobilizer has a communication failure, thus error B2775".

They quoted 3-4 hours to figure out what the issue could be (with an hourly rate of $118 per hour). I don't have all that money with me, and the car drives great, and gets great gas mileage. Would love to get any help on here as I personally dislike visiting dealers.

I have attached a full list of error codes I originally received when I plugged in my VCI cable and used the Techstream software, would love solutions and help on diagnosing these codes, and figuring out how to get the key fobs working again.

As a comment, I purchased this car few months ago for a good price, the car itself just topped 130,000 miles as of Saturday.

2004GoldPrius by darkgiant posted Sep 15, 2015 at 6:36 PM

2004GoldPriusError by darkgiant posted Sep 15, 2015 at 6:36 PM

 

To clarify, the fobs are registered to the car as Techstream showed two fobs were already programmed to the car, I tried both a set of new batteries but that did not do the trick. From some more research it looks like it is more of the ECU/Computer issue, but my problem is I don't know how much it would cost to replace and how to do it, but it sounds like it is all behind the glove box.

As for the low voltage, I ran a diagnostic test on the car that showed the battery loads, and it was giving me healthy numbers at the time, but this was about a month ago, but if I were to charge it, are there proper instructions on here on how to do so?

As for the troubleshooting advice, are there resources on here that I can follow? I'd much rather prefer figuring out the problem myself than spending a whopping $500+ at a dealer...

 

The diagnostic test that I ran was the 12V Battery, following these steps:

Not sure if that is an inaccurate way of measuring so?

 

I would indeed appreciate this technical manual! I for some reason can't send a PM here, any other particular way to get it?

 

Got it, thanks!

 

Can someone please help shed some light here? I have found the diagnosis for this error code, but in order to diagnose this, I need an Intelligent Tester (with CAN VIM) so it can connect to the DLC3, and from there, clear all DTC's.

I looked up with Intelligent Tester tool, and boy it is pricey ($350+). Any idea of clearing DTC's is possible with the Techstream software itself? I wouldn't mind putting ~$50-$75 on the tool but $350 is certainly out of my range, since I don't intend to keep it once I figure out this Smarkey issue... Any insight on this topic would be wonderful!

 

I do already have the Mini VCI cable, and have Techstream Lite installed onto my computer, but it asks for a key (I am assuming the serial key), and when I want to perform major actions such as reprogramming key fobs and what not, it takes me to a login page which looks like a page Toyota Dealers would only have access. Any clarification on that?

 

So I had resetted the Immobilizer and inputted the pin code, I still see the B2755 error code, but when I also check to program the Key Fobs, it says there are no fobs programmed to the car (it originally showed that two fobs were programmed the car). Now, I am having issues with programming the two "smart keys", and am looking for help on that as I keep failing as I am following TIS steps that it displays.

That being said, can this still be an ECU issue? How much does it cost to replace the ECU itself?

 

Uh, BUMP? Looking for some help here!

 

The two keys never unlocked or locked the cars when I purchased the car, but if you read above, the issue is communication from the Immobilizer (Error B2775). I cannot program the smart key funciton because of this issue, thus I am asking for some help here on the Immobilizer (in particularly to the Certification ECU).

After following Toyota's manual for this particular error, I am now 80% sure it has something to do with the Certification ECU, but I again do not know how I can access it, I know it is located behind the speedometer, but I wouldn't know exactly how to determine if it is working, or if it just has a bad wire connection and what not, which is what my main question now is.