Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE
Bluetooth® communication function
- The CMU uses the integrated Bluetooth® driver and antenna to perform communication between Bluetooth®-enabled devices and Bluetooth®.
- To perform Bluetooth® communication, pairing of a Bluetooth®-enabled device with the CMU is required to specify the device. For the pairing method, refer to the BLUETOOTH(R) PAIRING PROCEDURE (US) in the service information.
Specification
| Item | Content | |||
|---|---|---|---|---|
| Compatible profiles | A2DP 1.0/1.2 (Advanced audio distribution profile) | A2DP is a profile for transmitting high quality audio data by means of a Bluetooth ® device and wireless transmission technology. | ||
| AVRCP 1.0/1.3/1.4 (Audio/video remote control profile) | AVRCP is a profile which provides a standard interface which controls television and audio devices. The function differs depending on the version. | |||
| Maximum number of programmable devices | 7 | |||
| Number of Bluetooth ®-enabled devices which can be used simultaneously | 2 (1) | |||
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NOTE:
- The profile indicates the wireless communication standard. If the profile of the Bluetooth®-enabled device differs from the CMU, wireless transmission may not be possible. In addition, depending on the profile version, the corresponding functions differ.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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