B1775
DTC B1775: Microphone Input/Output Short to Power/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 B1775 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.
7. Disconnect the 20P connector from the roof console and the 22P connector from the HandsFreeLink control unit.
8. Turn the ignition switch to ON (II).
9. Measure the voltage between HandsFreeLink control unit 22P connector No. 9 terminal and body ground.
Is there battery voltage?
YES - Repair short to power in the wire between the HandsFreeLink control unit and the roof console.
NO - Go to step 10.
10. Turn the ignition switch to LOCK (0).
11. Check for continuity between HandsFreeLink control unit 22P connector No. 9 terminal and roof console 20P connector No. 8 terminal.
Is there continuity?
YES - Go to step 12.
NO - Repair open in the wire between the HandsFreeLink control unit and the roof console.
12. Check the vehicle's trim level.
Does the vehicle have a navigation system?
YES - Go to step 13.
NO - Substitute a known-good HandsFreeLink control unit, then recheck. If the symptom goes away, replace the original HandsFreeLink control unit.
13. Disconnect connector B (14P) from the navigation unit.
14. Turn the ignition switch to ON (II).
15. Measure the voltage between HandsFreeLink control unit 22P connector No. 21 terminal and body ground.
Is there battery voltage?
YES - Repair short to power in the wire between the HandsFreeLink control unit and the navigation unit.
NO - Substitute a known-good roof console, then recheck. If the symptom goes away, replace the original roof console.