Picture Has Lines/Other Issues
Picture has lines/other issuesDiagnostic 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
- Before troubleshooting, make sure you have the navigation system anti-theft code
1. Check for electronic aftermarket accessories (passibly hidden) mounted near the display unit or the navigation unit
Are there any electronic accessories?
YES - Disable the accessories, and recheck
NO - Go to step 2
2. 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 display panel control unit connector E (22P) terminal No 12 Also check for a short to ground between display panel control unit connector E (22P) terminal No 12 and terminal No 13
NO - Go to step 3
3. 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
4. Turn the ignition switch OFF
5. Substitute a known-good display panel control unit, and recheck
Is the picture OK?
YES - Check for loose connections, then replace the original display panel control unit.
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.