Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Display day/night mode does not work or does not work properly
- Check if the Day mode color is set to same as the Night mode color (refer to the navigation system manual).
- Check the vehicle battery condition first (see 12 VOLT BATTERY TEST ).
- Check the connectors for poor connection or loose terminals.
- Before troubleshooting, make sure you have the anti-theft code for the audio-navigation unit.
- After troubleshooting, enter the anti-theft code for the audio-navigation unit.
- Full brightness on the instrument panel brightness control with the head lights turned on causes the system to stay in the day mode, even when the lights are on.
- 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.
- 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.
- Go into the Diagnostic Menu, and use the Car Status test (see CAR STATUS ) to check for an ILL signal.
Is the ILL signal OK?
YES -Replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).
NO -Check the ILL+ circuit between the audio-navigation unit and the No. 29(10 A) fuse in the under-dash fuse/relay box.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.