B1775

DTC Troubleshooting: 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. Troubleshooting - B-CAN System Diagnosis Test Mode A

1. Connect the HDS to the DLC. Initial Inspection and Diagnostic Overview

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 Roof Console Replacement and the glove box. Glove Box Removal/Installation

7. Disconnect the 28P connector from the roof console and the 28P connector from the HandsFreeLink control unit.

8. Turn the ignition switch ON (II).

9. Measure the voltage between the HandsFreeLink control unit 28P connector terminal No. 13 and body ground.

Is there battery voltage?
YES - Repair short in the wire between the HandsFreeLink control unit and the roof console.

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 the roof console 28P connector terminal No. 6.

Is there continuity?
YES - Substitute a known-good HandsFreeLink control unit, Service and Repair and recheck. If the symptom/indication goes away, replace the original HandsFreeLink control unit. Service and Repair If the symptom/indication does not go away, replace the HFL-navigation microphone. Service and Repair

NO - Repair open in the wire between the HandsFreeLink control unit and the roof console.