Diagnostic Test: Self-Diagnosis Mode

WARNING: This page is about a different car, the 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first.
Check the connectors for poor connections or loose terminals.
Before troubleshooting, make sure you have the anti-theft code for the navigation system.
Make sure that the correct DVD color and version are installed.
Inspect the DVD for dirt or damage (see HOW TO IDENTIFY NAVIGATION DVD VERSIONS, AND HOW TO INSPECT A DVD FOR DAMAGE ).
Check any official Honda service website for more service information about the navigation system.

Check the No. 1 (10 A) and the No. 14 (7.5 A) fuses in the under-dash fuse/relay box the 30 A fuse (auxiliary under-dash fuse box) on the wire harness rear the under-dash fuse/relay box. 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 ACCESSORY (I).
Operate the radio, and listen to the audio.
Can you hear the audio?

YES - Go to step 4.

NO - Check the ACC circuit or refer to the audio system troubleshooting.
Turn the ignition switch to ON (II).
Measure the voltage between audio-navigation unit connector A (24P) terminals No. 14 and No. 24 and body ground individually.
Is there battery voltage?

YES - Go to step 6.

NO - If the +B wire does not have voltage, repair 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 open in the wire between the under-dash fuse/relay box and the audio-navigation unit.

Fig 1: Measuring Voltage Between Audio-Navigation Unit Connector A (24P) Terminals No. 14, No. 24 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the voltage between audio-navigation unit connector C (8P) terminal No. 1 and body ground.
Is there battery voltage?

YES - Go to step 7.

NO - There is an open or high resistance in the wire between the navigation unit and body ground (G503).

Fig 2: Measuring Voltage Between Audio-Navigation Unit Connector C (8P) Terminal No. 1 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the voltage between audio-navigation unit connector A (24P) terminals No. 12 and body ground, between audio-navigation unit connector C (8P) terminal No. 4 and body ground, and between audio-navigation unit connector B (24P) terminal No. 17 and body ground.

Fig 3: Measuring Voltage Between Audio-Navigation Unit Connector A (24P) Terminals No. 12 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Measuring Voltage Between Audio-Navigation Unit Connector B (24P) Terminal No. 17 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 5: Measuring Voltage Between Audio-Navigation Unit Connector C (8P) Terminal No. 4 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.2 V on all terminals?

YES - Replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).

NO - There is an open or high resistance in the wire between audio-navigation unit connector A (24P) terminal No. 12 or audio-navigation unit connector B (24P) terminal No. 17 and body ground (G503 and G502), or audio-navigation unit connector C (8P) and body ground (G503).