DTC B1792: HandsFreeLink Control Unit Internal Error

1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back ON (II).
3. Check for DTCs with the HDS.

Is DTC B1792 indicated? 

YES  - Replace the HandsFreeLink control unit.

NO  - Intermittent failure, the system is OK at this time.