B1775

DTC B1775: Microphone Input/Output Short to Power/Open

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A.

1. Turn the ignition switch to ON (II).
2. Clear the DTCs with the HDS.
3. Turn the ignition switch to LOCK (0), and then back 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.
7. Disconnect roof console 20P connector and HandsFreeLink control unit 28P connector.
8. Turn the ignition switch to ON (II).
9. Measure the voltage between the HandsFreeLink control unit 28P connector terminal No. 13 and body ground.






Is there battery voltage?

YES - Short to power in the wire between HandsFreeLink control unit and HFL microphone. Replace the affected shielded harness.

NO - Go to step 10.

10. Turn the ignition switch to LOCK (0).
11. Check for continuity between the HandsFreeLink control unit 28P connector terminal No. 13 and roof console 20P connector terminal No. 8.






Is there continuity?

YES - Substitute a known-good HandsFreeLink control unit, then recheck. If the symptom goes away, replace the original HandsFreeLink control unit.

NO - Open in the wire between HandsFreeLink control unit and HFL/navigation microphone. Replace the affected shielded harness.