DTC Troubleshooting: B1779
  1. Check for continuity between Hands Free Telephone control unit 28P connector terminal No. 2 and HFT switch 7P connector terminal No. 4.
Is there continuity?
YES -
Go to Step 13 .
NO -
Repair open in the BLU wire between the switch, the cable reel, and the Hands Free Telephone control unit.■
  1. Turn the ignition switch to ON (II).