Swapping framed mirror components inside frameless mirror
Sept 19, 2020 10:38:41 GMT
ceki92 likes this
Post by fvolanti on Sept 19, 2020 10:38:41 GMT
As the title says, I wanted to add High beam assist (FLA) to my car because I'm in the process of upgrading to xenons. But the automatic frameless mirror with high beam camera (3G0857511AE, 3G0857511BB, 3G0857511AR) is hard to find used and always very expensive, so I set out to get a automatic framed mirror with camera (3G0857511AG) and seeing if the internals were compatible and swappable with my automatic frameless mirror (3G0857511AC, also for 3G0857511AD). To my luck they are. The mirror is the same for most VW models so this applies also to Tourans, Passats, Tiguans, T-Rocs and more, when in doubt check the part numbers. This probably applies also to skodas, audis and seats.
First of all is disassembly. Tools required T10 and T15 screw bits and plastic prying tools, DON'T use a screwdriver or metal tools to pry the plastics as they will crack the mirror glass, ask me how I know.
To disassemble both mirrors use a plastic bone tool or similar prying tools along the borders, starting from the corners. There are many small tabs.
Internally the PCB is very different and with a lot more components, but both PCBs fit in both mirror housing and mount on the supports, they're 100% intercompatible. See the photos with small and big pcbs for comparison and both pcbs mounted on the rear of frameless mirror glass.
The connector for the mirror pcb can be mounted both to the left or right side (see yellow circled area).
To do the swap the hardest part beside disassembly is moving the connector. I had to de-pin and re-pin it in order to pass through the small canal since both sides of the connector housing are too big and get stuck. I did it on the external side connector. For this you need to open the connector housing bottom, push on the pin release mechanism and gently pull the wire.
The high beam assist camera swaps right over, just unscrew it, pull it down in the direction of the bottom corner mount and pull gently the flat cable from the canal. Do the reverse on the new mirror mount.
Put everything in place and apply medium force to reassemble the mirror.
I will not explore wiring, but basically the high beam camera needs to be connected to Can High and Low of a highline gateway (hex19), the rest of the wiring is already there for the automatic anti-dazzle functionality. The automatic anti-dazzle mirror uses 4 pins, while the one with the camera has 7. The extra pin is used for the automatic anti-dazzle external mirror that Golfs don't have as an option.
Curiosities: -both PCBs have two light sensors, one on the left side facing forward that detects ambient light and one in the middle facing rear, that handles the anti-dazzle function. The second looks through the glass via a small cutout in the reflective surface, just like the underscreen fingerprint sensor in a modern smartphone.
-For people interested in retrofitting anti-dazzle side mirrors, you can connect to the glass connectors and carry that signal to the door control module and then external mirror. I'd be easier to get 3G0857511AD / 3G0857511AF that already have the + and - pins in the mirror connector, but they can added this way if someone is crafty. I don't know which is + or - though
First of all is disassembly. Tools required T10 and T15 screw bits and plastic prying tools, DON'T use a screwdriver or metal tools to pry the plastics as they will crack the mirror glass, ask me how I know.
To disassemble both mirrors use a plastic bone tool or similar prying tools along the borders, starting from the corners. There are many small tabs.
Internally the PCB is very different and with a lot more components, but both PCBs fit in both mirror housing and mount on the supports, they're 100% intercompatible. See the photos with small and big pcbs for comparison and both pcbs mounted on the rear of frameless mirror glass.
The connector for the mirror pcb can be mounted both to the left or right side (see yellow circled area).
To do the swap the hardest part beside disassembly is moving the connector. I had to de-pin and re-pin it in order to pass through the small canal since both sides of the connector housing are too big and get stuck. I did it on the external side connector. For this you need to open the connector housing bottom, push on the pin release mechanism and gently pull the wire.
The high beam assist camera swaps right over, just unscrew it, pull it down in the direction of the bottom corner mount and pull gently the flat cable from the canal. Do the reverse on the new mirror mount.
Put everything in place and apply medium force to reassemble the mirror.
I will not explore wiring, but basically the high beam camera needs to be connected to Can High and Low of a highline gateway (hex19), the rest of the wiring is already there for the automatic anti-dazzle functionality. The automatic anti-dazzle mirror uses 4 pins, while the one with the camera has 7. The extra pin is used for the automatic anti-dazzle external mirror that Golfs don't have as an option.
Curiosities: -both PCBs have two light sensors, one on the left side facing forward that detects ambient light and one in the middle facing rear, that handles the anti-dazzle function. The second looks through the glass via a small cutout in the reflective surface, just like the underscreen fingerprint sensor in a modern smartphone.
-For people interested in retrofitting anti-dazzle side mirrors, you can connect to the glass connectors and carry that signal to the door control module and then external mirror. I'd be easier to get 3G0857511AD / 3G0857511AF that already have the + and - pins in the mirror connector, but they can added this way if someone is crafty. I don't know which is + or - though
