We need the model number off the inside of door area to be of assistance. Quick guess is the door lock has failed but they'll be a way to get whatever codes the CCU has stored to be more certain.

Does it give you any F codes? Start it and let it try it's thing. It may give you a code after a few minutes.
If not:
This is from memory (not always reliable these days)- If it doesn't work let me know.
I think you enter test on these by picking any 3 buttons (except start and power) and pushing them 1->2->3 3 times in a row quickly. I use the wide cycle mod buttons just for ease. Remember the 3 you use. If it goes into test all lights will light up. It may show you the most recent code after that. If not each of the buttons you used has a function in test mode. I'm blanking on which does what at the moment. I think the 1st is errors and the 2nd button is test.
Try that and report back. I'll look it up and verify the test entry tomorrow.

Alternatively, on the back of the the kick panel should be the service manual which will have the diagnostic test description in it. There's 3 screws under bottom edge of the panel to remove.