Without Navi
WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
On the audio switches, hold the "PAUSE/MUTE" and rotate the audio "Power/Volume" knob until the Self-Diagnostic screen shows on the display. Scroll down and select "Parts" with the joystick. Select the "Start HVAC Diagnostics" with the joystick to start the self-test. The fan bars will flash on the display during the self-test, and then the fault codes (if any are present) will display in the ambient temperature area. Refer to "SELF-DIAGNOSIS CODE CHART ". The fault codes will continue to scroll until self-diagnostic mode is exited. To exit self-diagnostic mode, press the "Previous" button on the audio switches repeatedly until the screen displays the HVAC status.