2010 codes: C1203, C1336, C1345, C1393

I'm having similar codes to that ECM malfunction gateway issues etc I'm looking at replacing the blue box that's right behind the upper glove box this weekend looks like a few people have done that and some of the tests in TIS the last part of that section they talk about replacing that blue gateway box the ECM itself and something else I will get all three parts off of 08 this weekend so I can swap them around take them apart look inside my originals for any traces of corrosion arcing something this just came out of nowhere actually right after I wash the car I bought the car the night before brought it home sat in the driveway overnight It was running when parked came out that mid-morning move the car with no issue put it in a sunny spot where I was going to clean the trunk hatch area that gets all clogged with leaves and tree debris and do the front cowl and wiper area that was kind of getting full of the same junk right after I got done washing and cleaning I don't think I flooded the car per se. The red triangle and all the lights lit up talking about the high voltage battery voltage crossing over into the low voltage area that's not happening according to my test meter and checking the bolt to battery case steady 114 and not moving. That ECM and gateway has got something to do with a lot of this non or miscommunication It looks like in my case anyway.

 

Actually this is happening right now on an '08 generation 2 but the codes are similar and the problems are very similar as far as this communication business and gateway go I don't know if the computers are exactly the same looking and in the same location but very similar readout and things and lights happen when these conditions are met I'm dealing with this right now and yes I have a lot of b codes in TIS the two main codes are the communication with the air conditioner and the leakage of the HV battery voltage to the rest of the car which as far as I can tell measuring at the battery plugs bolt to the case of the battery is not the case. And when I look up the repair procedures for that leakage at the very end of that procedure if you have the NG as you're going through the process the last page talks about replacing the blue communications computer and the ECM which would be quite costly if you were buying Toyota parts probably enough to put the car down

 

Might not have fried anything. Sometimes a glitch on the network while you're plugging or unplugging a diag tool will cause a bunch of errors and lights; it has happened to me when I was using a cable made with cheap, unplated pins. Sometimes, the codes will mostly go away after unhooking the 12 volt battery for a while. (Then you have to reset various forgotten things, like clock, radio presets, steering angle if you have the advanced parking, etc.)

If the brake codes for unlearned solenoid offset or stroke sensor keep coming back, then you'll have to go through those learning dances.

 

that's what I'm having right now /
So, what procedure do I have to go through to get that thing going again?
I tried the re-learn thing with techstream but it's not doing anything (it said it is, but the fast flashing lights never showed up) /
(Possible it's not doing anything because of the cable (9 years old, some things didn't work from the beginning on))?

 

You've got the evil C1451 code. You'll have to successfully complete the ECU's brake bleed procedure first to eliminate that code before anything else will work.

After that, the solenoid offset codes will usually be taken care of, or you go through that separate procedure then if they haven't.

 

brake bleeding is not working for whatever reason /
pretty much instantly after I press the last next button it says that it failed /

 

I had a batteryMinder connected .
Tried it again this morning - same thing /
I'm going to order a Tactrix cable & hope it'll work /

 

got the Tactrix cable --> same thing /

 

Did you find a solution? I’m having the same problem it’s driving me insane

 

Did any of you manually bleed the brakes yet The fronts have no air The rears have no air in the lines everything's dripping or running or squirting clear pretty much? If that's done what lights do you have on now or codes usually after I bleed manually everything is either working pretty much properly or I have lights Christmas tree up because the used brake actuator I'm using is also bad.

 

codes c1203 and c1345 wont go away when trying to erase them with techstream.
Abs, brake, (!) and vsc lights are on all the time and stay solid when doing the 120seconds valve offset solenoid learning instead of blinking.
Both accumulator and master cylinder are brand new, bought them on toyota dealer site with vin verification to make sure to get the right parts.
Car wont go in invalid mode after doing the brake pedal dance (but would go in invalid mode easily before parts were changed).
I did bleed the brakes manually with techstream plugged and followed the steps, and couldnt see any air bubbles even after using maybe 2/3 of a big brake fluid bottle for the rear and 1/3 for the front but will do it again to be sure.