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

NOTE:

Check the vehicle battery condition first (see 12 VOLT BATTERY TEST ).
This is often caused by a loss of battery power, or a poor ground.
Make sure that the correct navigation DVD color and version are installed.
Check any official Honda service website for more information about the navigation system.

Turn the ignition switch to ON (II).
Measure the voltage between audio-navigation unit connector A (24P) terminal No. 3 and body ground, and between audio-navigation unit connector C (8P) terminal No. 4 and body ground.

Fig 1: Measuring Voltage Between Audio-Navigation Unit Connector A (24P) Terminal No. 3 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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

Is there battery voltage in either terminal?

YES -Go to step 3.

NO -Repair an open in the wire(s) between the under-dash fuse/relay box and the audio-navigation unit.
Measure the voltage between audio-navigation unit connector A (24P) terminal No. 1 and body ground, and between audio-navigation unit connector C (8P) terminal No. 1 and body ground.

Fig 3: Measuring Voltage Between Audio-Navigation Unit Connector A (24P) Terminal No. 1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Measuring Voltage Between Audio-Navigation Unit Connector C (8P) Terminal No. 1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.2 V in either terminal?

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 (G503) (see DASHBOARD WIRE HARNESS (VIEW OF MIDDLE SECTION) (BD) ).