xDrive35i F15 short circuit

[UncleRashid]

Hi everyone,

Yesterday i was driving my X5 around town and parked it for about 10 minutes. I get back to the car, unlocks and everything seems normal up until the moment i push to start, after that i hear the clicking from the front but a bunch of errors for transmission, brake, and pdc malfunctions. AAA comes and tests both batteries, i was informed both were at full voltage. Tried to jump it anyway, no luck. Once I got it home I checked the codes and found the following:

804086
KL15WUP driver: Short circuit in battery voltage

804091
Driver KL15: Short circuit in battery voltage

8040A9
Start-stop button SST: incorrect operation (oblique pressure)

8040B6
Engine start error with starter operation: Relay sticker and or short circuit to battery voltage

80436E
Compressor clutch: line interruption or short circuit to positive

here is a video showing the symptoms:
https://youtube.com/shorts/Z7exIO1rj...6E1T_QfJqHcYv3

I am not exactly sure how to tackle this. I haven’t found much info online, I hear it could be a bad battery and I was thinking of swapping the battery from my F10 to see if it makes a difference. Main reason for this post is to see if anyone has any advice, or if anyone has experienced this before. Many thanks!

[UncleRashid]

does anyone have any ideas at all? I took a 105AH battery from my car and threw it on, no difference. BimmerLink will not let me erase 17 codes.

according to some research I did, some were reporting corroded ground straps were the issue. I haven’t been able to take a look at them. any info is appreciated!

[RED_Y_]

Hard to say, may be IBS module gone bad, or you do have a short somewhere. Your best bet is getting ISTA and check the troubleshooting plan and electrical diagrams for everything connected to the terminal KL15WUP. Do you have a dash cam or radar detector installed by any chance?

[UncleRashid]

I've meant to get ISTA on my laptop and will do that later. Nothing aftermarket is hardwired or installed, at least nothing that I know of. We had the car for about 3 years. I checked, and one of the ground straps was completely missing, and I just replaced it. The battery had gone completely flat between getting the car towed home and now, I tried jumping it but the issues persist. I read whatever codes I could, there are less codes now. The list of codes I attached will not clear from error memory. I haven't been able to check the other two ground straps.