Solutions-For Apple CarPlay & Android Auto Module-Sound issues

Solutions-For Apple CarPlay & Android Auto Module-Sound issues Solutions-For Apple CarPlay & Android Auto Module-Sound issues

June 15, 2026 By QiuChelsea

Sound issues：

Please note that for modules with the option to “use the original Bluetooth Audio”, you must pay attention to the order of connection, otherwise there will be no sound even if the car's Bluetooth is connected：

1.Enable the option to ”use the original Bluetooth Audio“-ON and the option to “Original MIC“-ON in the module.
2. Connect your phone to the module's Bluetooth to enable CarPlay/Android Auto. (After the Bluetooth connection is successfully established, it will automatically switch to a Wi-Fi connection, and the Bluetooth connection will be disconnected.)
3. Connect the phone to the car's Bluetooth and enable the Bluetooth audio channel in the car
Note: The sound channel of the mobile phone also needs to be switched to the car’s Bluetooth

If your module does not have the "Use the original Bluetooth audio" option, you need to follow the steps below to connect:
1. Connect an external microphone.
2. In the module settings, change the "original microphone" option to OFF
3. Connect your phone to the module's Bluetooth to enable CarPlay/Android Auto. (After the Bluetooth connection is successfully established, it will automatically switch to a Wi-Fi connection, and the Bluetooth connection will be disconnected.)
4. Switch the car's sound channel to AUX
Note: The mobile phone must not be connected to the car’s Bluetooth

1.For Porsche PCM3.1/PCM3.0:
No sound：
●Enter the OEM settings menu, find the audio settings, and select the AUX channel on the OEM interface when playing sound through CarPlay. Please watch the video: https://www.youtube.com/watch?v=AbAbZXHreDI.

●If there is no AUX option: Press the "CAR" key > Options > Set PCM System > Reset PCM > Factory Settings > YES, wait for the reset to complete, AUX will appear and activate AUX.

●If there is still no sound after selecting AUX, if PCM can read DISC, the original car optical fiber is not plugged in properly; if it cannot read DISC, the DVD drive may not be installed properly

●If there is still no sound after selecting AUX, or if you think the sound quality is not good, please turn on the use of original Bluetooth audio in the sound settings, and then connect the phone to the car Bluetooth after connecting CarPlay or Android Auto to get the sound.

2.For Volkswagen/Skoda/Audi
No sound：
●Enter the OEM settings menu, find the audio settings, and select the AUX channel on the OEM interface when playing sound through CarPlay.

●If there is no AUX option, please check whether the audio port is AMI. If so, you need to purchase the AMI-AUX adapter cable in the link:
https://www.isudar.com/products/extra-fee-with-external-ami-adapter-cable-for-carplay-module-box?variant=41227075846226

3.For Mercedes-Benz / BMW (USB-AUX sound card is not included in the module kit)
No sound:
●Enter the OEM settings menu, find the audio settings, and select the AUX channel on the OEM interface when playing sound through CarPlay.

●If there is no AUX option, please check whether the audio port has AUX. If not, please purchase the sound card in the connection:
https://www.isudar.com/products/extra-fee-with-external-usb-to-aux-adapter-cable-for-isudar-carplay-module-box?variant=40369200136274

4.Siri volume issue

Because Siri's volume is based on the Siri in the phone, sometimes after waking up, Siri's volume will be relatively low. Here are the steps to adjust it:

https://www.youtube.com/watch?v=9DrL8o4cGWE

1. Activate Siri using the phone's power button - the Siri icon will appear on the screen
2. Then immediately adjust the volume using the phone's volume button (note that it needs to be adjusted when the Siri icon is displayed)