B1780

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

NOTE:
- Information marked with an asterisk (*) applies to the switch with navigation system.
- 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 switch or HFL-voice control switch* test.

Is the switch OK?

YES - Go to step 6.

NO - Replace the HFL switch or HFL-voice control switch*.

6. Remove the roof console.
7. Disconnect the 28P connector from the HandsFreeLink control unit.
8. Disconnect the 20P connector from the cable reel.
9. Turn the ignition switch OFF.




10. Check for continuity between the HandsFreeLink control unit 28P connector terminal No. 2 and body ground.

Is there continuity?

YES - Repair short in the wire.

NO - Replace the HandsFreeLink control unit.