DTC 2703: Aircon Diag

NOTE: 

• Check the vehicle battery condition first .
• This navigation DTC sets when NG is indicated in the Aircon diagnosis (the A/C icon is red in the System Link).
• Check for B-CAN DTCs and resolve them before troubleshooting.
• Check any official Honda service website for more service information about the navigation system.
• Before you troubleshoot, make sure to follow the General Troubleshooting Information - Refer to: How to Troubleshoot the Navigation System, or How to Troubleshoot the Navigation System (Display Audio) (2016-17) .

1. Problem verification

   -1. Clear the hard error codes.

   - 2. Press the engine start/stop button to select the OFF mode and then select the ON mode.

   - 3. Check for hard error codes.

   Is DTC 2703 indicated?

   YES 

   The failure is duplicated, go to step 2.

   NO 

   Intermittent failure, the system is OK at this time.

2. Open wire check (B CAN-H line, B CAN-L line)

   -1. Press the engine start/stop button to select the OFF mode.

   - 2. Disconnect the following connectors.

   Audio-navigation unit connector A (24P) - Refer to: Audio-Navigation Unit Removal and Installation, or Audio-Navigation Unit Removal and Installation (Display Audio) (2016-17)

   Climate control unit 32P connector

   - 3. Check for continuity between test points 1 and 2.

   Test condition	OFF mode
   	Audio-navigation unit connector A (24P): disconnected
   	Climate control unit 32P connector: disconnected
   Test circuit	B CAN-H
   Test point 1	Audio-navigation unit connector A (24P) No. 4 (PNK)
   Test point 2	Climate control unit 32P connector No. 32 (PNK)

   Test circuit	B CAN-L
   Test point 1	Audio-navigation unit connector A (24P) No. 2 (BLU)
   Test point 2	Climate control unit 32P connector No. 30 (BLU)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The B CAN-H wire and the B CAN-L wires are OK. Go to step 3.

   NO 

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

3. Climate control unit check (substitution)

   -1. Substitute a known-good climate control unit.

   - 2. Reconnect all the connectors.

   - 3. Clear the hard error codes.

   - 4. Press the engine start/stop button to select the OFF mode and then select the ON mode.

   - 5. Check for hard error codes.

   Is DTC 1501 indicated?

   YES 

   Replace the audio-navigation unit - Refer to: Audio-Navigation Unit Removal and Installation, or Audio-Navigation Unit Removal and Installation (Display Audio) (2016-17) .

   NO 

   Replace the original climate control unit.