In need of help with U0100 and C1310 codes

So a few days ago my Prius got a red triangle in the deep of night and my car didn't let me drive much further than a half mile until a complete stop. At the time I ran a scan with Dr. Prius for the error codes I was getting, with were: P3000, U0100. Online I was seeing videos of needing to replace the fuse, but that was in the best case. Lacking time, I bit the bullet and towed the car to a Toyota dealer hoping they'd at least diagnose this quickly for a premium.

Upon replacing the 12v battery the car became functional but they want $450 in order to proceed with testing... I'm uncertain if that includes the $180 service fee but the service agent reads: C1310, U0100, that the 15a fuse burnt out and the positive terminal isn't properly installed. Then there was a recommendation for them to replace my ABS pump (he spoke earlier about relays, not sure if that applies here).

I'm thinking of buying a code reader and techstream for future reference but what would be the possible complications with going about this DIY? I have about a week and a half worth of time.


This is the technician preliminary report:

Perform initial vehicle inspection, found no power to vehicle, installed power supply. Vehicle no start condition found. Check engine light and delta light noted on at this time, no other warning lights noted. Perform health check retrieved trouble codes U0100 Lost Communication with ECM/PCM A under Hybrid system. ABS showing C1310 for HV System Malfunction. Perform electrical diagnosis, found 15A fuse blown. Replace fuse, clear codes. Vehicle started with booster. Found positive terminal not properly installed. Noted AGM battery type for aux source. Previous history noted ABS pump recommended. At this time no codes related found. At this time recommend OEM battery and correct battery condition. Request further information of conditions when malfunction occurred (stall). Possible intermittent condition that has not been verified.

 

The HV battery was replaced in 2015. I ran a test a few months back and it gave me a read for 80% battery life. Also the codes from Toyota didn't show up with P3000 as an issue; the reader I used was a $30 OBD II. The ABS isn't cycling every minute but maybe every occasional 5-15 minutes. I do notice that it comes on but it isn't irritating. What would you say is a normal cycle?

At large I'm hoping this is an inverter and fuse replacement...

 

The replacement was a new HV battery, from the Toyota dealer.

 

you're saying that this might have nothing to do with my inverter pump?

 

Ok, thanks. I won't have the car back until tomorrow to try to troubleshoot these things. Is the corroded ecu a hard fix?

 

Those are the codes they gave me. The service rep is saying since the 12v battery died that the codes were reset and this was all they could pull and would have to drive my car for fifty miles… I’m going to try tech stream tomorrow and replace the battery, fuse and *inverter pump.

 

ok that sounds about right.

 

So I changed the 12v battery and connected the inverter pump but couldn't bolt it down without taking off the headlights. I'll finish that tomorrow.

But this is what came out:

C1310 Malfunction in HV system

C1259 HV system Regenerative Malfunction

B1412 (air conditioner)

I tried changing the fuses a few times but the car would make an attempt to start and then leave me hanging.