Example device model: IAP92RGJS
Step 1: Check USB Connection
The possible cause of this issue might be an incorrect USB connection.
If you connect the included plug for the USB connection to the black plug from the car, this may cause the error.
Swap this with the included double USB connection plug, and it should work.
Please refer to the following images for guidance.
- rgj USB.png (196.41 KiB) Viewed 3301 times
- RGJ USB-.png (181.98 KiB) Viewed 3301 times
Step 2: Verifying the balance settings in the DSP app
Open the DSP app from the menu and navigate to the BALANCE settings. Ensure the fader is positioned in the center.
- RGJ DSP.png (72.94 KiB) Viewed 3301 times
Step 3: Adjusting Microphone Gain
Navigate to Settings -- Car infotainment -- About Device -- Select the gear Icon, then input password: 8878 -- Volume -- BT mic gain. Verify that the gain is adjusted correctly as the default setting may be at 0, potentially leading to audio issues.
Step 4: Test the Microphone Using Google Voice System
[*]Using the Google Voice system to test the microphone and ensure it is working properly.
[*]Launch the Google Voice Assistant and try different voice commands, such as "Call XXX" or "Play music."
[*]Listen for a response or check if your voice is recognized correctly.
Step 5: Check ISO Wiring Harness Connections
If you also cannot hear the other person, please refer to the following images.
You should find four connection plugs from your ISO wiring harness that include a plastic coupling.
Disconnect them and rearrange the connections as needed.
- RGJ WIRING 1.png (96.4 KiB) Viewed 3301 times
Default Connection as follow:
- RGJ WIRING 2.png (111.85 KiB) Viewed 3301 times
Connection Methode after swapping as follow:
- RGJ WIRING 3.png (154.66 KiB) Viewed 3301 times
Additional Tips:
If the issue persists after following these steps, it may be a good idea to double-check that all connections are secure and that there are no loose wires.
Ensure that your device firmware is up to date, as updates often contain fixes for known issues.