Display Day/Night Mode Does Not Work

Display day/night mode does not work

Diagnostic Test: Car Status

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.
- 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.
2. Change the day/night mode to AUTO 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 3.

3. Go into the Diagnostic Mode and use "Car Status" to check the ILL signal by turning the head lights ON, then OFF.

Is the "ILL" signal OK?

YES - The system is OK.

NO - Check the ILL+ circuit between the navigation unit and relay module.