Navigation System Symptom Troubleshooting - Picture is missing a color or tone
Picture is missing a color or tone
NOTE: Always check the connectors for poor connections or loose terminals.
  1. Go into the Diagnostic Menu, and use ‘‘RGB Color'' test under Monitor Check.
Are the red, green, and blue colored circles shown?
YES -
The system is OK at this time.■
NO -
Go to Step 2 .
  1. Turn the ignition switch to OFF.
  1. Disconnect navigation unit connector A (20P) and the navigation display 20P connector.
  1. Check for loose terminals at navigation unit connector A (20P) and the navigation display 20P connector.
Are there loose terminals?
YES -
Repair the terminal.■
NO -
Go to Step 5 .
  1. Check for continuity between the appropriate terminals of navigation unit connector A (20P) and the navigation display 20P connector based on the missing color(s).
    Missing color
    Navigation unit connector A (20P)
    Navigation display 20P connector
    Wire color
    Blue
    A11
    18
    YEL
    Green
    A2
    9
    RED
    Red
    A1
    8
    WHT

Is there continuity?
YES -
Go to Step 6 .
NO -
There is an open in the circuit between the navigation display and the navigation unit. Check for poor connections or loose terminals at the display and navigation units. If a poor connection or loose terminal is found, replace the affected shielded harness.■
  1. Check for continuity between the appropriate terminals of navigation unit connector A (20P) and the navigation display 20P connector based on the missing color(s).
    Missing color
    Navigation unit connector A (12P)
    Navigation display 20P connector
    Blue
    A11
    10, 20
    Green
    A2
    10, 20
    Red
    A1
    10, 20

Is there continuity?
YES -
There is a short to body ground in the circuit between the navigation display and the navigation unit. Replace the affected shielded harness.■
NO -
Replace the navigation unit. If the problem is still unresolved, replace the navigation display.■