B1780

DTC Troubleshooting: B1780

DTC B1780:

HandsFreeLink steering wheel switch line short

NOTE: Check the vehicle battery condition first Battery Test.

1. Start the engine, and turn the steering wheel from lock to lock several times.

2. Do the HFL Self-Diagnostic Function, and check for HFL DTCs.

Is DTC B1780 indicated?

YES -

Go to step 3.

NO -

Intermittent failure, the system is OK at this time.

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

4. Do the HFL Switch Test HFL Switch Test.

Is the switch OK?

YES -

Go to step 5.

NO -

Replace the HFL-navigation voice control switch HFL Switch Removal/Installation.

5. Disconnect the HandsFreeLink control unit 32P connector.

6. Disconnect the HFL-navigation voice control switch 5P connector.

7. Check for continuity between HandsFreeLink control unit 32P connector terminal No. 2 and body ground.





Is there continuity?

YES -

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

NO -

Replace the HandsFreeLink control unit Service and Repair.