Navigation System Symptom Troubleshooting - Display day/night mode does not work
Display day/night mode does not work
NOTE: Always check the connectors for poor connection or loose terminals.
  1. Change the day/night mode to auto mode under Set-up, and recheck.
Does the display change to day and night modes?
YES -
The system is OK at this time.■
NO -
Go to Step 2 .
  1. Go into the Diagnostic Mode, and use the ‘‘Car Status'' diagnostic to check for an ILL signal.
Is the ‘‘ILL'' signal OK?
YES -
The system is OK.■
NO -
Check the ILL+ circuit for an open or short to ground between the navigation unit and small light relay. If OK, substitute a known-good navigation unit and recheck.■