Charging proves that power reaches the phone, not that data lines work. Use the port documented for smartphone projection and a known-good data cable before changing software settings.
Use normal shutdown procedures, keep hardware dry and stop if you see damage, overheating, burning smells or any electrical risk.
Checks to perform in the right order
Confirm the exact symptom
Check whether the vehicle has separate charging-only and smartphone-projection USB ports.
Start with the simplest reversible check
Keep the phone and port unchanged while testing one known-good data cable.
Change one variable at a time
Compare a second compatible phone on the same port and cable to separate the car-side data path from the first phone.
Cross-test before resetting anything
Write down what changes and what stays the same. A controlled comparison is more useful than several resets performed together.
Escalate with useful evidence
If the problem survives the safe checks, record the model, software version, warning shown and tests already performed before contacting support.
How to narrow down the cause
- A change after one controlled test is a useful clue; keep the other variables unchanged.
- If a second compatible device works in the same setup, focus on the first device rather than replacing everything.
- Stop if there is heat, liquid, physical damage, burning smell or electrical risk.
Official sources used
Procedures can vary by model, firmware or hardware revision. When your device differs, use the official manufacturer documentation for that exact model.