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 battery voltage?
YES -
There is a short to power in the wires between the HandsFreeLink control unit and the HFL-navigation microphone. Replace the affected shielded
harness.?
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 See: Accessories and Optional Equipment/Cellular Phone/Communications Control
Module/Service and Repair, and recheck. If the symptom/indication goes away, replace the original HandsFreeLink control unit See: Accessories
and Optional Equipment/Cellular Phone/Communications Control Module/Service and Repair. If the symptom is still present, replace the
HFL-navigation microphone See: Accessories and Optional Equipment/Voice Activation System/Voice Activation Microphone/Service and
Repair/HFL-Navigation Microphone Removal/Installation.?
NO -
There is an open in the wire between the HandsFreeLink control unit and the HFL-navigation microphone. Replace the affected shielded harness.?
Without Navigation
DTC Troubleshooting: B1775
DTC B1775:
Microphone input/output shorted to power (without navigation)
