I've looked at one in the past, and looked through some of the bulletin boards and I'm sure I've managed to download it from someone.
I will have a look to see if I still have it, but in the meantime scan the various forums for CRX owners as there will be a lot of useful information there. Also I think the roof ECU will blink out error codes as well. Look at the ECU and/or short out the service connector.