B1780

DTC B1780: HFL-Voice Control Switch (HFL TALK/HFL BACK Buttons) Circuit Short

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A.

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, then start the vehicle and turn the steering wheel back and forth several times.
3. Check for DTCs with the HDS.

Is DTC B1780 indicated?

YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time.

4. Turn the ignition switch OFF.
5. Do the HFL-voice control switch test.

Is the switch OK?

YES - Go to step 6.

NO - Replace the HFL-voice control switch.

6. Remove the glove box.
7. Disconnect the 22P connector from the HandsFreeLink control unit.
8. Disconnect the 6P connector from the HFL-voice control switch.
9. Turn the ignition switch OFF.




10. Check for continuity between the HandsFreeLink control unit 22P connector terminal No. 2 and body ground.

Is there continuity?

YES - Repair a short in the wire.

NO - Replace the HandsFreeLink control unit