Symptom Troubleshooting
Navigation System Symptom Troubleshooting - Picture has lines, rolls, or is blurry
Picture has lines, rolls, or is blurry
Diagnostic Test: Monitor Check
NOTE:
- Check the vehicle battery condition first Battery Test.
- Always compare the screen image to a known-good vehicle. If the screen looks the same, inform the client that it is a characteristic of the system.
- Check the connectors for poor connections or loose terminals.
- Make sure that the correct navigation DVD color and version are installed.
- Inspect the navigation DVD for dirt or damage.
- Check any official Honda service website for more service information about the navigation system.
- Check the navigation screen settings for brightness, contrast, and black level, and check the color screen for map color and menu color.
- Before troubleshooting, make sure you have 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.
1. Check for electronic aftermarket accessories (possibly hidden) mounted near the navigation display unit or the navigation unit.
Are there any electronic accessories?
YES -
Disable the accessories, and recheck.
NO -
Go to step 2.
2. Turn the ignition switch to ON (II) and start up the navigation screen and check it.
Is the picture scrolling horizontally (left to right or right to left), have lines across the screen, or is blurry?
YES -
Go to step 3.
NO -
Intermittent failure, the system is OK at this time.
3. Turn the ignition switch to LOCK (0).
4. Disconnect navigation unit connector B (32P) and the navigation display unit 20P connector.
5. Check for continuity between navigation unit connector B (32P) terminal No. 18 and body ground.
Is there continuity?
YES -
There is a short to body ground in the wire between the navigation unit and the navigation display unit. Replace the affected shielded harness.
NO -
Go to step 6.
6. Check for continuity between the terminals of navigation unit connector B (32P) according to the table.
Is there continuity between any of the terminals?
YES -
Go to step 7.
NO -
There is a short in the wire(s) between the navigation unit and the navigation display unit. Replace the affected shielded harness.
7. Check for continuity between navigation unit connector B (32P) terminal No. 18 and navigation display unit 20P connector terminal No. 19.
Is there continuity?
YES -
Go to step 8.
NO -
There is an open in the wire(s) between the navigation unit and the navigation display unit. Replace the affected shielded harness.
8. Substitute a known-good navigation display unit Service and Repair, and recheck.
Is the picture OK?
YES -
Check for loose connections. If the connections are OK, replace the original navigation display unit Service and Repair.
NO -
Check for loose connections, and recheck. If a poor connection or loose terminal is found, replace the shielded harness. If no poor or loose terminals are found, substitute a known-good navigation unit Service and Repair, and recheck. If the symptom/indication goes away, replace the original navigation unit Service and Repair.