Navigation frequently asks for anti-theft code and/or needs GPS initialization

NOTE:

This is often caused by a loss of battery power, a low or poor battery condition, or a poor ground.
Make sure that the latest navigation software is installed.
Before troubleshooting, make sure you have the anti-theft code.
After troubleshooting, enter the anti-theft code.
Check any official Honda service website for more service information about the navigation system.

Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Check for poor connection or loose terminals at audio-navigation unit connector A (24P).
Are there connection or terminals OK?

YES -Repair poor connection or loose terminals, and recheck.

NO -Go to step 3.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
Measure the voltage between body ground and audio-navigation unit connector A (24P) terminals No. 14 and No. 24 individually.

Fig 1: Measuring Voltage Between Body Ground And Audio-Navigation Unit Connector A (24P) Terminals No. 14 And 24
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 5.

NO -If the +B wire does not have voltage, repair an open in the wire between the No. 15 (10 A) fuse in the under-hood fuse/relay box and the audio-navigation unit. If the ACC wire does not have voltage, repair an open in the wire between the No. 18(7.5 A) fuse in the driver's 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.

Fig 2: Measuring 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 -Replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).

NO -Repair an open or high resistance in the wire between the audio-navigation unit and body ground (G502) (see CONNECTOR TO FUSE/RELAY BOX INDEX ).