[willisodhiambo]

I am guessing if rain sensor is disabled when vehicle is locked, you could try to reposition the RLS fuse to another location in the fuse box, where power is on constantly.

Don't all power switch off completely in 15minutes except CAS key detection? If so how would the RLS communicate to FRM to close windows? No ECU will be listening to the bus!

Just thinking aloud.

[BimmerSLO]

That is true. But.... trafic on the can-bus wakes up modules connected to it. If there is not to much battery drain, this might work.

[jaki]

That is true. But.... trafic on the can-bus wakes up modules connected to it. If there is not to much battery drain, this might work.

Uh, you mean. RLS is sleeping until it starts to rain and wakes up with can messages. Dream on. RLS is not designed to work in that manner at all. It is either ON all the time or off.
It would be nice to have that kind of autoclose, but I doubt You can do it in E- or F- series.

[willisodhiambo]

That is true. But.... trafic on the can-bus wakes up modules connected to it. If there is not to much battery drain, this might work.

Uh, you mean. RLS is sleeping until it starts to rain and wakes up with can messages. Dream on. RLS is not designed to work in that manner at all. It is either ON all the time or off.
It would be nice to have that kind of autoclose, but I doubt You can do it in E- or F- series.

I thought so. I imagine there is another ECU that sends messages to RLS and RLS responds to these messages with amount of refraction it can detect. Without a master ECU the RLS itself is dead? Will read more on how it works. Interesting ideas though.

[Alexandru.k_24]

I did some coding a while ago on my other car (VW Passat CC 2011), and it's working great. I can leave the sunroof opened when it's too hot outside, and have do worry about the rain. It would be awesome to do this on our BMW's.