Navigation System Symptom Troubleshooting - Picture has lines/other issues
Picture has lines/other issues
Diagnostic Test: Monitor Check
NOTE:
  • Always compare the screen image to a known-good vehicle. If the screen looks the same, inform the customer that it is characteristic.
  • Always check the connectors for poor connections or loose terminals.
  1. Check for electronic aftermarket accessories (passively hidden) mounted near the navigation display or the navigation unit.
Are there any electronic accessories?
YES -
Disable the accessories, and recheck.■
NO -
Go to Step 2 .
  1. Start up the navigation picture.
Is the picture scrolling horizontally (left to right or right to left)?
YES -
Check for an open or short to ground in the C SIG wire from navigation unit connector A (20P) terminal No. 12 to navigation display 20P connector terminal No. 19. Also check for a short to ground between navigation display 20P connector terminal No. 19 and terminal No. 20.■
NO -
Go to Step 3 .
  1. Go into the Diagnostic mode, and use ‘‘RGB Color'' diagnostic under Monitor Check.
Is the picture missing a red, green or blue color?
YES -
Do troubleshooting for the picture is missing a color or tone. ■
NO -
Go to Step 4 .
  1. Turn the ignition switch OFF.
  1. Substitute a known-good navigation display, and recheck.
Is the picture OK?
YES -
Check for loose connections, then replace the original navigation display. ■
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 and recheck. If the problem is gone, replace the original navigation unit. ■