Identify the Problem

• Verify that the problem persists every time you use the system.
• Take note of any error messages or unusual behavior, such as a frozen screen, lack of sound, or inability to connect to devices.

Perform a Soft Reset

• Locate the power button on the infotainment system.
• Press and hold the power button for about 12-15 seconds until the system resets.
• Check if the system starts working correctly after the reset.

Check the Vehicle's Battery

• Ensure that the vehicle's battery is in good condition, as a weak battery can cause electronic systems to malfunction.
• Perform a visual inspection or have a professional check the battery's voltage and charge level.

Inspect the Connections

• Check that all cables and connections associated with the infotainment system are secure and undamaged.
• Focus on any known connection areas, such as USB or auxiliary ports.

Update the Software

• Access the settings menu on your infotainment display.
• Look for an option to update the software or system firmware, often found within an "About" or "System Information" menu.
• Follow the on-screen instructions to download and install updates, if available.

Check Bluetooth/Audio Settings

• Ensure that your Bluetooth settings are properly configured if you are experiencing connectivity issues.
• Verify audio settings such as volume levels and source selections to ensure they're set correctly.

Verify Navigation and Other Apps

• If specific features like navigation or apps aren't working, check if they need updates or separately enabled services.
• Consult your vehicle's manual about managing these apps or services.

Consult Your Dealer or Professional

• If none of the above steps resolve the issue, it could be a more intricate problem requiring professional diagnosis.
• Contact your local Toyota dealership or a certified technician for a thorough examination and repair.

Warranties and Recalls

• Verify if your vehicle is still under warranty, as repairs might be covered at no additional cost.
• Check for any recall notices related to the infotainment system by consulting Toyota's website or contacting your dealer.

These troubleshooting steps can help pinpoint the problem with the infotainment system, and in many cases, resolve it without the need for professional intervention. Always ensure any actions you perform do not void your vehicle warranty.