Manufacturer Code Charts: 2703
Navigation System DTC Troubleshooting: 1501, 2703
DTC 1501:
Aircon Error
DTC 2703:
Aircon Diag
NOTE:
- Check the vehicle battery condition first Testing and Inspection.
- These navigation DTCs sets when a communication error between the climate control unit and the audio-navigation unit (open or short) is detected.
- Check for B-CAN DTCs and resolve them before troubleshooting.
- When the ignition switch is in ACC (I) or the engine start/stop button to select the ACC mode, the climate control unit is turned off. The navigation loses communication with the climate control unit and stores DTC 1501 and/or 2703. Therefore, there is a possibility that the system is normal even though DTC 1501 and/or 2703 is stored. Check System Links with the engine running, and if it appears OK, the system is OK at this time. If it is NG, do the following troubleshooting.
- Before you troubleshoot, make sure to follow the General Troubleshooting Information How to Troubleshoot the Navigation System.
1. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, then back to ON (II), or the ON mode.
2. Go into the System Diagnostic Mode, and select the Self-Diagnosis Mode in the Select Diagnosis Items menu Navigation System Diagnostic Mode.
3. Check the System Links.
Is the Aircon icon red?
YES -
Go to step 4.
NO -
Intermittent failure, the system is OK at this time.�
4. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
5. Disconnect audio-navigation unit connector D (20P).
6. Connect audio-navigation unit connector D (20P) terminals No. 4, No. 5, and No. 14 with jumper wires.
7. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
8. Press and hold the AUTO button, then press and hold the FAN ON/OFF button.
Are both HEAT/VENT indicators solid with the remaining icons blinking?
YES -
Replace the audio-navigation unit Audio-Navigation Unit Removal/Installation (With Navigation).�
NO -
Go to step 9.
9. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, then disconnect the jumper wires.
10. Disconnect climate control unit connector C (20P).
11. Connect climate control unit connector C (20P) terminals No. 4, No. 5, and No. 6 with jumper wires.
12. Check for continuity between audio-navigation unit connector D (20P) terminals No. 4, No. 14, and between terminals No. 5 and No. 14.
Is there continuity?
YES -
Go to step 13.
NO -
Repair an open in the wire(s) between the audio-navigation unit and the climate control unit.�
13. Disconnect the jumper wires.
14. Check for continuity between body ground and audio-navigation unit connector D (20P) terminals No. 4, No. 5, and No. 14 individually.
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 15.
15. 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 wire(s) between the audio-navigation unit and the climate control unit.�
NO -
Go to step 16.
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 body ground and audio-navigation unit connector D (20P) terminals No. 4, No. 5, and No. 14 individually.
Is the voltage above 0.2 V?
YES -
Repair a short to power in the wire(s) between the audio-navigation unit and the climate control unit.�
NO -
Replace the climate control unit Climate Control Unit Removal/Installation.�