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Re: Polo 6C Rain Light Sensor DIY Help
Posted: Fri Oct 04, 2024 2:42 pm
by n4s
to all people that had difficulties with the BCM coding, if nothing is connected to the BCM C15, means that the LinBus on that Pin is Off and it is necessary to activate it.
BCM byte 20, bit 1 - Roof_lin (in VCDS) needs to be active to enable that LIN BUS.
Re: Polo 6C Rain Light Sensor DIY Help
Posted: Mon Oct 06, 2025 7:33 pm
by SelmanAkts
Hello,
On 6C, where is the cable going from pin 2 of the Auto difference sensor switch (10 pin) to the BMC connected to? I searched everywhere, please help
Re: Polo 6C Rain Light Sensor DIY Help
Posted: Tue Oct 07, 2025 3:33 am
by ciclo
Re: Polo 6C Rain Light Sensor DIY Help
Posted: Tue Oct 07, 2025 8:19 am
by SelmanAkts
Thank you for your help. The schematic says t73a/43. Isn't the T73a component 24 pin?
Re: Polo 6C Rain Light Sensor DIY Help
Posted: Tue Oct 07, 2025 9:12 am
by ciclo
T73 = 73 pins
T73a is one of the three connectors on the 6C BCM (J519), you can see its location in the PDF (at the end, pg 493).
Use the PDF tools for a more comprehensive search.
Re: Polo 6C Rain Light Sensor DIY Help
Posted: Tue Oct 07, 2025 5:32 pm
by Tinman
Hi, Did you check the harness going into the rotary switch to see if pin 2 is wired (I think, I cant remember if thats the wire for auto function, is been awhile since i did the auto/rain sensor mod). On my 6C is was already wired, I'm not sure if this standard or only specific trim (Mine is Rline Trim).
