Manufacturer Code Charts: 2605

Navigation System DTC Troubleshooting: 2605

DTC 2605:

H/U Diag: Connect

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- This navigation DTC sets when a problem (open or short) is detected in the GA-Net bus.
- Check for B-CAN DTCs and resolve them before troubleshooting.
- Before you troubleshoot, make sure to follow the General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes.

1. Clear the hard error code.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Check the Error History.

Is DTC 2601 indicated?

YES -

Do the DTC 2601 troubleshooting.

NO -

Go to step 4.

4. Go into the System Diagnostic Mode, and select the Self-Diagnosis Mode in the Select Diagnosis Items menu Navigation System Diagnostic Mode.

5. Check the System Links.

Is the Radio icon red?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time.�

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

7. Check for poor connections or loose terminals at audio unit connector E (14P) and navigation display unit 28P connector.

Are there connections OK?

YES -

Go to step 8.

NO -

Repair poor connections or loose terminals, and recheck.�

8. Disconnect audio unit connector E (14P) and navigation display unit 28P connector.

9. Connect audio unit connector E (14P) terminals No. 9 and No. 10 with a jumper wire.






10. Check for continuity between the navigation display unit 28P connector terminals No. 3 and No. 17.





Is there continuity?

YES -

Go to step 11.

NO -

There is an open in the wire(s) between the audio unit and the navigation display unit. Replace the affected shielded harness.�

11. Substitute a known-good audio unit Audio Unit Removal/Installation (With Navigation).

12. Turn the ignition switch to ON (II).

13. Clear the hard error code.

14. Turn the ignition switch to LOCK (0) and then back to ON (II).

15. Check for the hard error code.

Is DTC 2605 indicated?

YES -

Replace the original audio unit Audio Unit Removal/Installation (With Navigation).�

NO -

Replace the navigation display unit Service and Repair.�