Sunroof open during Downpour

[Quacker]

Originally Posted by Lexman8

Pretty much everything on this car is controlled by ECUs connected over networks. In older cars turning off the ignition switch literally cut the power to most systems but this is no longer true. Turning off the ignition these days is really telling a shed-load of ECUs to power off or go to sleep. It's when they don't do this that problems can arise; a good example is battery drain where a system doesn't go to sleep but just keeps on drawing power.

Good luck getting it dried out. I actually don't think it'll cause any long term issues.
_

I had a BMW X5 that had a computer that invariably woke up and drained the battery at a certain railway station car park and random other places. It had something to do with radio frequencies used by something nearby I think.
I changed that car for a Range Rover with basically the same electronics but by that time they had got to the bottom of whatever was the issue and I never had a problem with it.

So this kind of thing is nothing new. Its been going on for the last 15 years or more. My Land Cruiser Amazon bristles with body, chassis and engine management computers, all communicating with each other, and that is all of 19 years old.
I have a far more sophisticated tractor made in 2004 that has an amazing control system with CAN-bus that I'm not going to bore anyone with other than to say that virtually everything that you can't start to imagine is monitored, displayed in several places, interlaced and very customisable by the driver to an extent that makes the Volvo seem almost primitive. The only thing it lacks is a touchscreen which is obviously fitted to current models along with auto steering and millimetre accuracy sat-nav.