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

Fig 1: Navigation System DTC Troubleshooting Flow Chart (Navigation Frequently Asks For Anti-Theft Code And/Or Needs GPS Initialization)

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Courtesy of AMERICAN HONDA MOTOR CO., INC.

NOTE:

CHECK THE VEHICLE BATTERY CONDITION FIRST .
Check any official Honda service website for more service information about the navigation system.
Check the connectors for poor connections or loose terminals.

Problem verification:
- 1. Check if the Anti-Theft System screen or the CSF (GPS Initialization) screen is displayed every time the ignition switch is turned to ON (II).
Is Anti-Theft System screen or CSF screen displayed every time?

YES : The failure is duplicated, go to step 2.

NO : Intermittent failure, the system is OK at this time.
Open wire check (GND line):
- 1. Measure the voltage between test points 1 and 2.
  Test condition IG ON (II)
  
  Test circuit GND
  
  Test point 1 Audio-navigation unit connector A (24P) No. 1 (BLK)
  
  Test point 2 Body ground
  
  Test circuit GND
  
  Test point 1 Audio-navigation unit connector B (20P) No. 20 (BLK)
  
  Test point 2 Body ground
  
  Fig 2: Measuring Voltage Between Audio-Navigation Unit Connector A (24P) No. 1 And Body Ground
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
  
  Fig 3: Measuring Voltage Between Audio-Navigation Unit Connector A (20P) No. 20 And Body Ground
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there less than 0.2 V?

YES : The GND wires are OK. Go to step 3.

NO : Repair an open or high resistance in the wire(s) between the audio-navigation unit and body ground (G502) and/or body ground (G503).
DTC check:
- 1. CHECK FOR HARD ERROR CODES .
Are there any navigation DTCs indicated?

YES : Go to indicated DTC's troubleshooting.

NO : REPLACE THE AUDIO-NAVIGATION UNIT .