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DTC Troubleshooting: B1780

DTC B1780:

HandsFreeLink steering wheel switch line short (without navigation)

NOTE:

- Check the vehicle battery condition first Battery Test.
- 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.

2. Clear the DTCs with the HDS How to Troubleshoot the HandsFreeLink System.

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, then start the vehicle and turn the steering wheel back and forth several times.

4. Check for DTCs with the HDS.

Is DTC B1780 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time.

5. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

6. Do the HFL Switch Test HFL Switch Test.

Is the switch OK?

YES -

Go to step 7.

NO -

Replace the audio remote-HFL switch Overhaul.

7. Remove the center console panel Center Console Panel Removal / Installation.

8. Disconnect the HandsFreeLink control unit 28P connector.

9. Disconnect the audio remote-HFL switch 12P connector, and connect the cable reel connectors.

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





Is there continuity?

YES -

Repair a short to body ground in the wire between the switch, the cable reel, and the HandsFreeLink control unit.

NO -

Replace the HandsFreeLink control unit Service and Repair.