Navigation System Symptom Troubleshooting - Picture is missing a color or tone
  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.■