Car won't start, P3108-594, UO129-220/528, UO146-435

Good evening guys! I got 2006 Prius with following codes: P3108-594, UO129-220/528, UO146-435.

The car itself won't start and all I hear is one click instead of usual 3. Dashboard, A/C, Steering wheel, Radio, nothing will work or turn on (the dashboard does show the check engine light, so it does work, but there is nothing expect the open door and engine light). After some reading I checked all the fuses (all good), I also did disconnect/connect 12v battery + HV battery safety plug and the car have worked for a couple of hours before it just stopped. At this moment I suspect either the Hybrid Vehicle Control Ecu or the Wires, probably tomorrow I will check all the wires for resistance, and if they are good I wanted to try and replace the Hybrid Vehicle Control Ecu.

P3108-594 = A/C Amplifier Communication Circuit Malfunction
U0129-220 = Lost Communication With Brake System Control Module
U0129-528 = Lost Communication With Brake System Control Module
U0146-435 = Lost Communication With Gateway "A"


Any ideas or advice on what to do? Maybe someone had the same problem before.

 

It's better to check the Master Relay instead of replacing the ECU? I did checked all fuses and they're fine. I will try and replace the 12v but that's probably not the problem.

 

Sorry for confusion, by master relay I meant the Main Relay, the one we have in our hybrid pack. I do have pictures from Techstream but the website will not allow me to post any of them. It is not a mechanical issue, so that's why I've checked all the fuses, and wanted to check resistance on Hybrid Vehicle Control ECU Wires because that's what manual says. Maybe I have to check an Inverter and the wires connected to the Inverter because it may be where the problem comes from. I suppose, I have to play whack a mole until I will find some loose connection or a corroded wire.

 

Thank you for the answer! If you can spare a minute to look at this file, page 21 and 26. That's were they say to check the branch wire, battery and body ground wires, and if they're okay, then you have to replace the Hybrid Vehicle Control ECU. I may got a little bit confused on how I'm suppose to use the manual and that's why I'm doing this in a wrong way.

 

Okay, I will keep that in mind.

I did had a little accidents to the driver side, but I was driving for a whole week with no problems. Not so sure if this is the problem or not.

 

Problem solved: (I hope)

The problem laid in a fuse box under the hood, I don't know the exact name but it wasn't the relay or fuse itself, but the big "fuse" on a left side. Here is a video, after fixing this, the car started to work and that's was all. Took us hours to figure out why the car didn't get the positive, and where is the problem, but then we did checked this "fuse" and he was broken. Not sure of the cause, but I think this may happened because of how I jumped started the car when my battery got discharged. Probably because of that, this "fuse" blown up. Thanks for the help!

 

I did the same what the guys on a video did. In other word I just soldered it.

 

You're absolutely right on that, and this 'repair' is just a temporary solution. I'll probably get a new fusible link and replace it.