2019 Edge - RCM error U0413 Invalid Data Received from Battery Energy Control Module 'B' (where is it, how to replace it, etc.?)

[DanEdge82]

Long story short... airbag light came on 3 weeks ago, then the battery died within 2 days. It was an old battery so I bought a new one and dropped it in, and did the 5x headlights 3x brake 'trick' to reset things, assuming that was sufficient.

This week, the airbag light came on again, but this time, the new battery died yesterday. I jumped it, ran it for quite some time.

I hadn't bothered to check codes before this, so I grabbed my OBD2 cable & started up Forscan.

There were a number of codes, but only one present at the time of request. I figure the others came up due to the battery dying. So I reset the DTCs and just one code continues to come up:

• U0413 Invalid Data Received from Battery Energy Control Module 'B' (from the RCM)

 

It seems like the BECM 'B' is busted and drawing current when the vehicle is off, because... I also used Forscan to check the Battery State of Charge last night, and it was 99%. 8 hours later: 70%.

I ran the vehicle for about an hour or so and it was back up in the 90s. 

I searched U0413 and found one other thread on this forum, but that person also had a bunch of other errors and their issue seemed to be the RCM itself.

 

The BECM 'B' module looks to be PN HU5T-14G490-AF or HU5T-14G490-0C and it's like $70 new or $35 if I take the eBay plunge. 

So, the questions I have for the other owners here, are...

• Do you think my BECM 'B' is the root cause? Or is it failing because of something else (like a short? ugh... I hope it's not a short...)
• Where is the BECM 'B' located, exactly? I'm cool with tearing some things apart to get to it, but I don't know where to find it...
• Is the BECM 'B' a plug & play / drop & replace type of part, or does it need very specific programming for my specific make/model/VIN/etc.?
• Since the RCM is shooting the BECM 'B' communication error, should I be worried about the RCM/airbags/SRS?
• Am I stuck with needing to take this to a dealer?

 

Thanks in advance for any suggestions or insight!