DTC Troubleshooting: B1779
  1. Measure the voltage between Hands Free Telephone control unit 28P connector terminal No. 2 and body ground.
Is there voltage?
YES -
Repair short to body ground in the wire between the Hands Free Telephone control unit and the HFT switch.■
NO -
Go to Step 15 .
  1. Turn the ignition switch to LOCK (0).