The aux input on a 2003 Toyota Matrix radio is a 3.5mm jack that allows you to connect an external audio source, such as an MP3 player or smartphone, to your car's audio system. This allows you to listen to music, audiobooks, or other audio content from your external device through your car's speakers.
How to use the aux input on a 2003 Toyota Matrix radio:
1. Make sure that your Toyota Matrix radio is turned on.
2. Locate the aux input jack on your car's radio. It is usually located on the front panel of the radio or in the glove compartment.
3. Connect one end of a 3.5mm audio cable to the aux input jack on your car's radio.
4. Connect the other end of the 3.5mm audio cable to the headphone or audio output jack on your external audio device.
5. Select the "Aux" input on your car's radio.
6. Adjust the volume on your car's radio and on your external audio device to a comfortable level.
7. Start playing your audio content on your external audio device and listen through your car's speakers.
Here are some additional tips for using the aux input on a 2003 Toyota Matrix radio:
* Make sure that the 3.5mm audio cable is fully inserted into the aux input jack on your car's radio.
* If you are using a smartphone, make sure that the volume is turned up and that the phone is not in silent or vibrate mode.
* If you are experiencing static or interference, try using a different 3.5mm audio cable.