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If you get a code like this:
"B280C The output for the indicator lamp 'Blind Spot Assist' has a malfunction. There is a short circuit to positive or an open circuit."
Then your Blind Spot Indicator LEDs in the side mirror may have failed.
The part you can find to replace is basically the entire sideview mirror glass but it is really expensive, even used, especially with heating and dimming. I thought I would try to fix it instead.
Here is how I fixed mine.
The LEDs looked fried so I found what looked like a replacement. Ordered from Digikey. Replaced carefully with soldering iron using ESD protection. Polarity is very important!
The LEDs actually have 2 LEDs in each component (Amber and Red)
The first replacement was too dim so I tried another
The second try seemed just right. This part is a 2.1V forward voltage at 30mA
MFG : AMS-OSRAM USA INC. (VA)
PART: 475-LSYT67B-R2T2-1-0+S2U2-26-0-30-R18-ZCT
Unfortunately, this part is EOL
Sprayed circuit board with clear conformal coat and reassembled mirror.
Blind Spot Indicator LED circuit board. These are the LEDs. Notice the dark area (failed) inside the upper left LED.
Mine are also having an issue there the yellow one basically stopped working is is working intermittently and dimm. While the red also doesn't always work, on both sides. I want to test them before buying replacements and soldering them. Do you know if its 12V applied to the pins?
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