Speaker Circuit: Description
WARNING: This page is about a different car, the 2007 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
The sound signal that has been amplified by the stereo component amplifier assembly is sent to the speakers from the stereo component amplifier assembly through this circuit.
If there is a short in this circuit, the stereo component amplifier assembly detects it and stops output to the speakers.
Thus sound can not be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly or speakers.