After a crash on a Polestar 2 and your scan tool won't communicate with the vehicle?

Before assuming it's a failed module or the high-voltage battery, check the main 12V fuse first. A blown main fuse can leave the vehicle with little or no communication, making diagnosis much more difficult.

Not every no-communication fault is a pyro fuse.

Here's a quick look at one we're diagnosing in the workshop. Hopefully it helps other workshops or EV owners understand where to start.