Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Display Day/Night Mode Does Not Work

Display day/night mode does not work

NOTE:
- Check the display setting.
- 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 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 Menu, and use the "Car Status" test to check for an ILL signal.

Is the "ILL" signal OK?

YES - The system is OK.

NO - Check the ILL+ circuit between the navigation unit and No. 10 (15 A) fuse in the passenger's under-dash fuse/relay box.