DTC Troubleshooting: B1776
DTC B1776:
 Microphone Input/Output Short to Ground/Open
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch OFF, and then back ON (II).
  1. Check for DTCs with the HDS.
Is DTC B1776 indicated?
YES -
Go to Step 4 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Turn the ignition switch OFF.
  1. Remove the ambient light and the driver's dashboard lower cover.
  1. Disconnect the 3P connector from the microphone and the 22P connector from the Hands Free Telephone control unit.
  1. Check for continuity between body ground and the No. 9 and No. 10 terminals of the Hands Free Telephone control unit 22P connector individually, then between terminals No. 9 and No. 10.
Is there continuity?
YES -
Repair short in the wires between the Hands Free Telephone control unit and the microphone.■
NO -
Go to Step 8 .
  1. Disconnect the 14P connector from the navigation unit.