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WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2014 Honda Ridgeline, 2013 Honda Ridgeline, 2012 Honda Ridgeline, 2011 Honda Ridgeline, and 2010 Honda Ridgeline. 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 ).
Check the connectors for poor connections or loose terminals.
Make sure that the correct navigation DVD color and version are installed.
Check any official Honda service website for more service information about the navigation system.
For problems with the rearview camera, go to rearview camera image does not come on or work properly troubleshooting (see REARVIEW CAMERA IMAGE DOES NOT COME ON OR WORK PROPERLY ).
Before troubleshooting, make sure you have the anti-theft code for the audio system and the navigation system.
After troubleshooting, enter the anti-theft code for the audio system and the navigation system.

Check the No. 7 (7.5 A) fuse and the No. 32 (7.5 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?

YES -Go to step 2.

NO -Replace the fuse(s), and recheck. ■
Turn the ignition switch to ON (II).
Operate the radio, and listen to the audio.
Can you hear the audio?

YES -Go to step 4.

NO -Refer to audio system troubleshooting. ■
Do the Forced Starting of the Navigation Unit (see FORCED STARTING OF NAVIGATION UNIT ).
Is the diagnosis menu for the picture diagnosis displayed?

YES -Go to step 13.

NO -Go to step 5.
Shield the navigation display unit from the sun with your hand, and check that the display is back lit (only back light is ON.)
Can you see the back light?

YES -Substitute a known-good navigation unit (see NAVIGATION UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original navigation unit (see NAVIGATION UNIT REMOVAL/INSTALLATION ).

NO -Go to step 6.
Turn the ignition switch to LOCK (0).
Connect the HDS to the DLC (see HOW TO CHECK FOR DTCS WITH THE HDS ).
Turn the ignition switch to ON (II).
Check for DTCs with the HDS.
Are there any DTCs present?

YES -Troubleshoot the DTC, then recheck.

NO -Go to step 10.
Turn the ignition switch to ON (II).
Measure the voltage between body ground and navigation unit connector A (8P) terminals No, 1 and No. 2 individually.

Fig 1: Measuring Voltage Between Body Ground And Navigation Unit Connector A (8P) Terminals 1, 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 12.

NO -If the +B or ACC wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the navigation unit. ■
Measure the voltage between navigation unit connector A (8P) terminal No. 4 and body ground.

Fig 2: Measuring Voltage Between Navigation Unit Connector A (8P) Terminal No. 4 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 02.V?

YES -Go to step 13.

NO -Repair open or high resistance in the wire between the navigation unit and body ground (G501) (see FLOOR WIRE HARNESS (RIGHT BRANCH) ). ■
Measure the voltage between body ground and navigation display unit connector A (20P) terminals No. 1 and No. 2 individually.

Fig 3: Measuring Voltage Between Body Ground And Navigation Display Unit Connector A (20P) Terminals 1, 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 14.

NO -If the +B or ACC wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the navigation display unit. ■
Measure the voltage between the navigation display unit connector A (20P) terminal No. 10 and body ground.

Fig 4: Measuring Voltage Between Navigation Display Unit Connector A (20P) Terminal 10 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.2V?

YES -Substitute a known-good navigation unit (see NAVIGATION UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original navigation unit (see NAVIGATION UNIT REMOVAL/INSTALLATION ). If the symptom/indication goes away, replace the navigation display unit (see NAVIGATION DISPLAY UNIT REMOVAL/INSTALLATION ). ■

NO -Repair open in the wire between the navigation display unit and body ground (G402) (see DASHBOARD WIRE HARNESS (RIGHT BRANCH) ). ■