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.
- Before troubleshooting, get the navigation system anti-theft code.
- After troubleshooting, enter the navigation system anti-theft code.
- In the set-up/colors menu, make sure that both the day and night map background colors are not set to white.
- Full brightness on the instrument panel brightness control causes the system to stay in the day mode, even when the lights are on.

1. Make sure the instrument panel brightness control is not on full brightness. Turn the headlights on, and adjust the dash brightness to the middle range.
2. Change the day/night mode under Set-up to "Auto" and recheck.

Does the display change to day and night modes when turning the headlights on and off?

YES - The system is OK at this time.

NO - Go to step 3.

3. Go into the Diagnostic Menu, and use the "Car Status" test to check for an ILL signal.

Is the "ILL" signal OK?

YES - Replace the navigation unit.

NO - Check the ILL+ circuit between the navigation unit and No. 14 (7.5 A) fuse in the under-dash fuse/relay box.