Comm Error Motor Error Message

Comm error motor message is caused by a communication failure between the IO board and the motor board and could be the result of:

1. Harness between IO and Motor Board. Check connection point and harness for continuity.

2. Bad motor board

3. Loose wire/pin connection(s)

4. Check for matching numbers on the motor board and the motor expander board

Follow link below for more:

Viper and Viper Elite Troubleshooting Co2 Solenoid Vs Expansion Tank (cornelius.com)​