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.
  • Before troubleshooting, get the navigation system anti-theft codes.
  • After troubleshooting, enter the navigation system anti-theft codes.
  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 the navigation unit connector A (20P) and display unit 20P connector.
  1. Check for loose terminals at navigation unit connector A (20P) and display unit 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) to display unit connector B (20P) based on the missing color(s).
    Missing color
    Navigation unit connector A (20P)
    Display unit connector B (20P)
    Wire color
    Blue
    A11
    B18
    YEL
    Green
    A2
    B9
    RED
    Red
    A1
    B8
    WHT

Is there continuity?
YES -
Go to Step 6 .
NO -
There is an open in the circuit between the display unit 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 display unit connector B (20P) based on the missing color(s).
    Missing color
    Navigation unit connector A (12P)
    Display unit connector B (20P)
    Blue
    A11
    B10, B20
    Green
    A2
    B10, B20
    Red
    A1
    B10, B20

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