Too many faults and problem connecting OBD

[bahcekapili]

Hello everyone,

I locked the car overnight, and when I opened the doors again in the morning, the dashboard displayed warnings for a parking brake malfunction, suspension malfunction, and brake malfunction. The car wouldn't start, and when I first tried to connect it to the OBD, it wouldn't connect. I removed the battery, waited a while, and tried again, but it didn't work. Finally, I gave up, locked the doors again, and somehow it connected, showing numerous errors similar to the attached image. I cleared them all, and the car started successfully. The battery voltage is 12.5, and it's a 1-year-old EFB battery. Do you think the problem could be the engine internal fuse box or the BSI brain? I'm not exactly thrilled about the idea of getting stranded in the middle of nowhere like this. It's been three days since this malfunction, and there are no problems now.

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[mickthemaverick]

My reaction to that list would be a power supply problem of some sort, possibly the main earth connection to the engine, possibly a battery terminal issue and possibly a fusebox/ECU problem. You should do a full scan with a high end scan tool and see what fault codes you have,

[bahcekapili]

Before this malfunction, I tried to figure out the problem by removing the door trim and sockets because the left front window regulator cable had snapped. While it was open, I did some cleaning. I can't say I paid much attention to the sockets during this cleaning. I went to a repair shop, had the cable repaired, put the trim back on, and returned, and there was no problem. The next morning, I got these malfunctions.

About a week has passed since then. I started and stopped the car 5-10 times and drove it, and so far there are no problems. I hope it's just a simple contact issue and that it's temporary.

[bahcekapili]

I think the problem is related to the BSI unit. By chance, the following situation occurred. When I opened the drawer in front of the fuse box on the left side of the steering wheel, the vehicle gave the same error codes. Again, I couldn't connect with OBD. After playing around with the BSI unit a bit, OBD connected. At least now I can act with this in mind, or I should consult a good electronics technician.