Last year when the one of the solenoids in the DCCV was shorting out, it caused enough EMI/RFI (static noise) that it also effected the brake module. Once the DCCV was replaced the issue with the service brake message when away.
I have had the same problem with a bad DCCV causing service parking brake messages. I was always able to reset the message by shutting the car off then restarting. I found that my parking brake worked just fine, but I had no heat control on the passenger side ( and no A/C on pass side ). I replaced the DCCV and heat control and A/C returned and the service parking brake messages went away.
My thanks to the guy who responded in one of the other service parking brake threads with a simple:
DCCV