( TL19E00K735000Y1775FAAT01 )

DTC Troubleshooting: B1775 - With NAV.

1. Check for continuity between Hands Free Telephone control unit 28P connector terminal No. 13 and HFT/navigation microphone 7P connector terminal No. 3.

Is there continuity?

YES | - | Substitute a known-good Hands Free Telephone control unit, then recheck. If the symptom goes away, replace the original Hands Free Telephone control unit.■
NO | - | Replace the faulty harness between the Hands Free Telephone control unit and the HFT/navigation microphone.■