B1776
DTC B1776: Microphone Input/Output Short to Ground/Open1. Connect the HDS to the DLC.
2. Clear the DTCs with the HDS.
3. Turn the ignition switch to LOCK (0), and then back to ON (II).
4. Check for DTCs with the HDS.
Is DTC B1776 indicated?
YES - Go to step 5.
NO - Intermittent failure, the system is OK at this time.
5. Turn the ignition switch to LOCK (0).
6. Remove the roof console and the passenger's console trim cover.
7. Disconnect the 20P connector from the roof console and the 22P connector from the HandsFreeLink control unit.
8. Check for continuity between body ground and the No. 9 and No. 10 terminals of the HandsFreeLink control unit 22P connector individually, then check for continuity between same terminals and HandsFreeLink control unit 22P connector No. 20 terminal (harness shield).
Is there continuity?
YES - Repair short in the wires between the HandsFreeLink control unit and the roof console or body ground.
NO - Go to step 9.
9. Check the vehicle's trim level.
Does the vehicle have a navigation system?
YES - Go to step 10.
NO - Substitute a known-good HandsFreeLink control unit, then recheck. If the symptom goes away, replace the original HandsFreeLink control unit.
10. Disconnect the 14P connector from the navigation unit.
11. Check for continuity between HandsFreeLink control unit 22P connector No. 22 terminal and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between the HandsFreeLink control unit and the navigation unit.
NO - Substitute a known-good navigation unit, then recheck. If the symptom goes away, replace the HandsFreeLink control unit.