Without Navigation

DTC Troubleshooting: B1779

DTC B1779:

HandsFreeLink steering wheel switch failure (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 How to Troubleshoot the HandsFreeLink System.

2. Clear the DTCs with the HDS.

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 B1779 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. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

11. Measure the voltage between audio remote-HFL switch 12P connector terminal No. 9 and body ground.





Is there voltage?

YES -

Go to step 14.

NO -

Go to step 12.

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

13. Check for continuity between HandsFreeLink control unit 28P connector terminal No. 2 and audio remote-HFL switch 12P connector terminal No. 9.





Is there continuity?

YES -

Go to step 18.

NO -

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

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

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

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

17. Measure the voltage between HandsFreeLink control unit 28P 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 audio remote-HFL switch.

NO -

Replace the cable reel Service and Repair.

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

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

19. Check for continuity between audio remote-HFL switch 12P connector terminal No. 11 and audio 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 unit.