Hi zeronimbus,
I also had a major breakdown of the CCM module after 100km driving in heavy rain. The module no longer sent out status info. You can test this with the ZeroNG app from Hans. To further investigate the problem I queried the MBB console and received this:
ZERO MBB>
*************************************************************
* CCM Data *
*************************************************************
UTC_time: Mon, 01/01/2007 00:00:00
Parameter, Value, In Test
last_packet_s, 99, 0
last_packet_ms, 416, 0
unit_id, 0, 0
fw_ver, 2000.0.0, 0
fw_ver_raw, 0x00, 0
.....
Most interesting for we was the UTC time as well as the firmware version (fw_ver_raw) showing 0. This was for me the indicator, that the CCM module was broken. Zero replaced the module, but question remains, if I get the same problem after the next rain....
To test your CCM module you can try ZeroNG (look for the "actual date") Is this outdated? If yes I would query the MBB (command ccm).