2010 Acura Truck MDX V6-3.7L Page 174

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)

2010 Acura Truck MDX V6-3.7L Page 673

8. Turn the ignition switch to ON (II).

9. Measure the voltage between body ground and ODS unit harness 18P connector terminal No. 1. There should be battery voltage.

Is there battery voltage?

YES -

Go to step 10.

NO -

Open in the right engine compartment wire harness, floor wire harness, or ODS unit harness; replace the faulty harness, then clear the DTC.?

10. Turn the ignition switch to LOCK (0).

11. Measure the resistance between body ground and ODS unit harness 18P connector terminal No. 12. There should be less than 1.0 Ohms.

Is the resistance as specified?

YES -

Go to step 12.

NO -

Open in the floor wire harness or ODS unit harness, or poor connection at the ODS unit harness 18P connector and the ODS unit. Check the ground

connection at G605. Check the connection; if the connection is OK, replace the faulty harness, then clear the DTC.?

12. Disconnect the negative cable from the battery, then wait at least 3 minutes.