Mazdaspeed333
Dear Mazdaspeed333,
We sincerely apologize that the previous solutions did not resolve your issues.
Regarding the FM background sound issue:
The new system upgrade we previously provided did not solve the problem. After further communication with our engineers, it seems that if the system upgrade doesn’t resolve the issue, the problem is likely with the radio chip.
If you have time, could you please capture a system log and send it to us for further analysis of the issue? If it turns out to be a chip (hardware) problem, please feel free to contact us at our official email: [Login to see the link], and we can arrange for a replacement.
Regarding the voice button, answer, and hang-up issues:
First, I have asked the engineers to carefully review the protocol data video you sent, and they confirmed that the original car is not sending any voice data to the head unit.
Additionally, I have discussed with the engineers about the situation where manually wiring the buttons did not resolve the voice issue.
Typically, the original car’s steering wheel control buttons are connected via a signal wire (either key1 or key2), and pressing each button generates different resistance values to trigger different functions.
If you have a multimeter, you can test it this way:
Set the multimeter to DC 20V.
Connect the black probe to the ground.
Connect the red probe to key1 (if you’re currently using key2, connect the red probe to key2).
Press the voice, answer, and hang-up buttons and check if there’s any voltage change.
If no voltage change is detected when pressing the buttons, unfortunately, it seems the issue cannot be resolved.
We apologize for the inconvenience and thank you again for your cooperation. Please let us know the results of the testing, and feel free to contact us if you need any further assistance!
Best regards,
Leo
