Confirm the app supports CarPlay and is not restricted, then update and test one app. Change one variable at a time and keep the original data or settings safe.
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
Separate a missing icon, an icon that fails to open and an app that closes during use.
Check the relevant setup
Check CarPlay settings, restrictions and app compatibility with the iPhone and iOS.
Run one controlled test
Restart the iPhone and head unit and compare the app on the phone and in CarPlay.
Compare the result
Repeat the test with one compatible cable, account, network or accessory changed. A controlled comparison shows whether the fault follows the device or the environment.
Escalate with evidence
Record the exact model, software version, warning and result of each safe check. Use the manufacturer's support page before deleting data or opening hardware.
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.