Circuit/System Testing

Note: It is recommend that Component Testing is performed before Circuit Testing when diagnosing speaker channels.

1. With the scan tool, verify the DTC is set by the amplifier.
   • If the DTC was set by the amplifier, test the suspect speaker input circuit for an open short to ground or short to power. If all circuits test normal, replace the amplifier.
2. Test the suspect low level audio signal circuit from the radio to the speakers or amplifier, if equipped, for an open short to ground or short to power.
   • If all circuits test normal, replace the radio.