With Navigation

DTC Troubleshooting: B1779

DTC B1779:

HandsFreeLink steering wheel switch failure (with navigation)

NOTE: Check the vehicle battery condition first Battery Test.

1. Start the vehicle, and turn the steering wheel left and right several times.

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

Is DTC B1779 indicated?

YES -

Go to step 3.

NO -

Intermittent failure, the system is OK at this time.

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

4. Do the HFL Switch Test HFL Switch Test.

Is the switch OK?

YES -

Go to step 5.

NO -

Replace the audio remote, HFL-navigation voice control switch Overhaul.

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

6. Disconnect the HandsFreeLink control unit 32P connector.

7. Disconnect the audio remote, HFL-navigation voice control switch 12P connector, and connect the cable reel connectors.

8. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

9. Measure the voltage between audio remote, HFL-navigation voice control switch 12P connector terminal No. 9 and body ground.





Is there voltage?

YES -

Go to step 13.

NO -

Go to step 10.

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

11. Check for continuity between HandsFreeLink control unit 32P connector terminal No. 2 and audio remote, HFL-navigation voice control switch 12P connector terminal No. 9.





Is there continuity?

YES -

Go to step 16.

NO -

Repair an open in the wire between the switch, the cable reel, and the HandsFreeLink control unit.

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

13. Disconnect cable reel connector A (20P).

14. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

15. Measure the voltage between HandsFreeLink control unit 32P connector terminal No. 2 and body ground.





Is there voltage?

YES -

Repair a short to power in the wire between the HandsFreeLink control unit and the cable reel.

NO -

Replace the cable reel Service and Repair.

16. Disconnect audio-navigation unit connector A (24P).

NOTE: Eject all the discs before disconnecting the audio-navigation unit to prevent damaging the CD/DVD player's load mechanism.

17. Check for continuity between audio remote, HFL-navigation voice control switch 12P connector terminal No. 11 and audio-navigation unit connector A (24P) terminal No. 5.





Is there continuity?

YES -

Replace the HandsFreeLink control unit Service and Repair.

NO -

Repair an open in the wire between the switch, the cable reel, and the audio-navigation unit.