DTC 2703: Aircon Diag

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first (see BATTERY TEST ).
This navigation DTC set when a common 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 (see GENERAL TROUBLESHOOTING INFORMATION ).
If the A/C system does not work properly, do the A/C system troubleshooting.
Make sure you run the diagnostic with the ignition switch in the ON (II) position as this DTC sets if the test is run with the ignition switch in the ACCESSORY (I) position.

Clear the hard error code (see HOW TO CLEAR ERROR HISTORY ).
Turn the ignition switch to LOCK (0), and then back to ON (II).
Go into the Diagnostic Menu, and select the Self-Diagnosis Mode in the Select Diagnosis Items menu (see SYSTEM DIAGNOSTIC MODE ).
Check the System Links.
Is the Aircon icon red?

YES -Go to step 5.

NO -Intermittent failure, the system is OK at this time.
Turn the ignition switch to LOCK (0).
Disconnect these items:
- Audio-Navigation unit connector F (20P)
- Climate control unit connector A (40P) and connector B(14P)
Check for continuity between body ground and audio-navigation unit connector F (20P) terminals No. 4, No. 5, No. 10, and No. 14 individually.

Fig 1: Checking Continuity Between Body Ground And Connector F (20P) Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Are there continuity?

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

NO -Go to step 8.

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

From terminal	To terminals
F4 (YEL)	F5 (RED), F14 (BLU)
F5 (RED)	F14 (BLU)

Fig 2: Identifying Audio-Navigation Unit Connector F (20P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

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 9.

Check for continuity between climate control unit connector A (40P), connector B (14P), and audio-navigation unit connector F (20P) according to the table.

Climate control unit connector	Audio-Navigation unit connector	Wire color
A2	F4	YEL
A21	F14	BLU
A22	F5	RED
B8	F10	BLU

Fig 3: Identifying Climate Control Unit Connector A (40P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Identifying Climate Control Unit Connector B (14P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 5: Identifying Audio-Navigation Unit Connector F (20P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Replace the climate control unit (see FRONT EVAPORATOR TEMPERATURE SENSOR REPLACEMENT ), and recheck.

NO -Repair an open in the wire(s) between the audio-navigation unit and the climate control unit, and recheck.