Diagnostic Test: Self-Diagnosis Mode
- Check the vehicle battery condition first (see BATTERY TEST ).
- Check if * button has been pressed, and turned off the display (see Owner's manual for more information).
- Check the connectors for poor connections or loose terminals.
- Check for and resolve all CAN DTCs before troubleshooting the navigation system.
- Before troubleshooting, make sure you have the anti-theft codes for the audio-navigation unit.
- After troubleshooting, enter the anti-theft codes for the audio-navigation unit.
- Check any official Honda service website for more service information about the navigation system.
- Check the No. 5 (10 A) fuse, the No. 7 (10 A) fuse, and the No. 32 (10 A) fuse in the under-dash fuse/relay box, and reinstall the fuses if they are OK.
Are the fuses OK?
YES -Go to step 2.
NO -Replace the fuse, and recheck.
- Turn the ignition switch to ON (II).
- Do the forced starting of the audio-navigation unit (see FORCED STARTING OF THE AUDIO-NAVIGATION UNIT
).
Is the diagnosis menu of the picture diagnosis displayed?
YES -Go to step 5.
NO -Go to step 4.
- Shield the display unit from the sun with your hand, and check that the display is back lit (only the back light is ON.)
Can you see the backlight?
YES -Substitute a known-good audio-navigation unit (including the HDD) (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ). If the symptom is still present, replace the navigation display unit (see NAVIGATION DISPLAY UNIT REMOVAL/INSTALLATION ).
NO -Go to step 7.
- Measure the voltage between body ground and audio-navigation unit connector A (24P) terminals No. 14 and No. 24 individually.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there battery voltage?
YES -Go to step 6.
NO --If the +B wire does not have voltage, repair an open in the wire between the under-dash fuse/relay box and the audio-navigation unit. If the ACC wire does not have voltage, repair an open in the wire between the under-dash fuse/relay box and the audio-navigation unit.
- Measure the voltage between audio-navigation unit connector A (24P) terminal No. 12 and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there less than 0.2 V?
YES -Go to step 7.
NO -Repair an open or high resistance in the wire between audio-navigation unit connector A (24P) terminal No. 12 and body ground (G504) (see CONNECTOR TO FUSE/RELAY BOX INDEX ).
- Measure the voltage between body ground and navigation display unit 28P connector terminals No. 1 and No. 2 individually.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there battery voltage?
YES -Go to step 8.
NO -If the +B wire does not have voltage, repair an open in the wire between the under-dash fuse/relay box and the navigation display unit 28P connector. If the ACC wire does not have voltage, repair an open in the wire between the under-dash fuse/relay box and the navigation display unit 28P connector.
- Measure the voltage between navigation display unit 28P connector terminal No. 15 and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there less than 0.2 V?
YES -Substitute a known-good navigation display unit (see NAVIGATION DISPLAY UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original navigation display unit (see NAVIGATION DISPLAY UNIT REMOVAL/INSTALLATION ). If the symptom is still present, replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).
NO -Repair an open or high resistance between navigation display unit 28P connector terminal No. 15 and body ground (G506) (see CONNECTOR TO FUSE/RELAY BOX INDEX ).