1) Try all the commands in device mode.
2) Try the "Discrete Code Hunter" forum under "Jump to" at the bottom of the page
3) Try a similar Pioneer model hoping it has the correct dataset of commands.

Note: When you see a message saying there are updates available for a device, don't blindly update that device. Else, you will get the latest "cleaned up" dataset version, and may find missing commands including some handy ones. Instead, momentarily add a copy of the device (which will get the latest dataset) and check all the commands in device mode first. If your are happy with the new dataset, then proceeds with the update/device replacement.