Manufacturer Code Charts: 2703

Navigation System DTC Troubleshooting: 2703

DTC 2703:

Aircon Diag

NOTE:

- Check the vehicle battery condition first Battery Test.
- This navigation DTC set when a communication error between the climate control unit and the audio-navigation unit (open or short) is detected.
- Check any official Honda service website for more service information about the navigation system.
- Check for B-CAN DTCs and resolve them before troubleshooting.
- Before you troubleshoot, make sure to follow the General Troubleshooting Information How to Troubleshoot the Navigation System.
- If the A/C system does not work properly, do the A/C system troubleshooting.

1. Clear the hard error code.

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

3. Go into the System Diagnostic Mode, and select the Self-Diagnosis Mode.

4. Check the System Links.

Is the A/C icon red?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time.

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

6. Disconnect audio-navigation unit connector D (20P).

7. Connect audio-navigation unit connector D (20P) terminals No. 4 and No. 5 with a jumper wire, then connect terminals No. 4 and No. 14 with a jumper wire.






8. Press and hold both the AUTO button of the climate control unit and the ON/OFF button of the climate control unit, then turn the ignition switch to ON (II).

Are both HEAT/VENT indicators solid with the remaining icons blinking?

YES -

Replace the audio-navigation unit Audio-Navigation Unit Removal/Installation.

NO -

Go to step 9.

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

10. Remove the jumper wires.

11. Disconnect climate control unit connector B (12P).

12. Check for continuity between audio-navigation unit connector D (20P) and body ground according to the table.









Are there continuity?

YES -

Repair a short to body ground in the wire(s) between the audio-navigation unit and the climate control unit.

NO -

Go to step 13.

13. Check for continuity between the terminals of audio-navigation unit connector D (20P) according to the table.









Is there continuity between any of the terminals?

YES -

Repair a short in the wires between the audio-navigation unit and the climate control unit.

NO -

Go to step 14.

14. Check for continuity between audio-navigation unit connector D (20P) and climate control unit connector B (12P) according to the table.













Is there continuity?

YES -

Replace the climate control unit Climate Control Unit Removal/Installation, and recheck.

NO -

Repair an open in the wire(s) between the audio-navigation unit and the climate control unit.