Why does my phone charge by USB but not appear on the car screen?

Start by separating two questions: does this USB port transfer data, and does the vehicle support the projection feature you are trying to use? A phone charging is not proof of either. Chevrolet, for example, distinguishes ports that support phone connectivity from charging-only ports; its guidance says a charging-only port cannot be used for Apple CarPlay or Android Auto. Port locations and available features vary by vehicle, so use your own vehicle’s Owner’s Manual to identify the correct port and confirm what it supports. [S1]

Look for the manual’s section on USB, smartphone connection, Apple CarPlay, or Android Auto. Follow its directions for the specific model and year rather than choosing a port just because it is nearby or charges the phone.

Use the identified data port and a cable intended to carry data, not just provide power. For Chevrolet vehicles that support Android Auto, Chevrolet’s wired-connection guidance specifies the vehicle’s USB data port and recommends the phone manufacturer’s cable to help avoid connection issues. The guidance also says requirements differ across models; it does not establish that one cable or procedure applies to every vehicle or explain why a particular connection fails. [S2]

For a simple comparison, keep the phone and port the same and try the recommended cable if available. If you try another cable, change only that one thing and note the result. Follow any pairing or setup prompts described in your manual. If the screen still does not recognize the phone, record what happened rather than assuming the phone or car has a particular fault.

Check the manual for the exact feature name—such as Apple CarPlay or Android Auto—and your vehicle’s model and year. A vehicle may have USB charging without offering the particular phone-projection feature, and availability can differ across vehicles. The Chevrolet material supports checking the manual and the correct data port for its own vehicles; it does not establish compatibility for other makes, every model year, or your specific phone. [S1] [S2]

If the manual confirms support and the specified setup still does not work, keep a short record of your checks. For example: “Vehicle: [make/model/year]. Feature: [name]. Port used: [manual’s description]. Phone: [model]. Cable: [description]. Result: phone charges; screen shows [what you observe]. Checks tried: [list].” Share that with the vehicle maker’s support service or a qualified service provider and ask them to confirm the vehicle’s compatibility and connection procedure. This description organizes observations; it does not diagnose the cause.

Yes. Use this order:

1. Check the Owner’s Manual for the exact phone-projection feature and whether your vehicle supports it.
2. Find the manual-designated USB data port; do not assume a charging port supports data. [S1]
3. Connect using the prescribed setup. For supported Chevrolet Android Auto wired connections, the guidance specifies the data port and recommends the phone manufacturer’s cable. [S2]
4. Note whether the phone charges, whether the vehicle displays a prompt, and any message on screen.
5. If it still fails, share your vehicle details and observations with the vehicle maker’s support service or a qualified service provider.

Keep the test narrow: use the manual’s instructions, change one connection detail at a time, and write down the result. That makes it easier to distinguish a port or compatibility question from a connection that needs further help.