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. 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 driver's dashboard lower cover.
7. Disconnect the 7P connector from the HFL/Navigation Microphone and the 28P connector from the HandsFreeLink control unit.
8. Turn the ignition switch to ON (II).
9. Measure the voltage between HandsFreeLink control unit 28P connector terminal No. 13 and body ground.






Is there voltage?

YES - Replace the faulty harness between the HandsFreeLink control unit and the HFL/navigation microphone.

NO - Go to step 10.

10. Turn the ignition switch to LOCK (0).
11. Check for continuity between HandsFreeLink control unit 28P connector terminal No. 13 and HFL/navigation microphone 7P connector terminal No. 3.






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 - Replace the faulty harness between the HandsFreeLink control unit and the HFL/navigation microphone.