DTC Set In Radio Without Amplifier

WARNING: This page is about a different car, the 2007 Saturn Outlook. However, it is still accessible from the selected car via links, so may be relevant.

With the scan tool, verify the DTC is set by the radio.
Ignition OFF, disconnect the suspect speaker. Test for 1-50 ohms across the suspect speaker terminals.
- If not within the specified range specified range replace the suspect speaker.
Disconnect the suspect radio harness connector.
Test for less than 1 volt on both of the low level audio signal circuits.
- If greater than 1 volt repair short to voltage.
Test for infinite resistance between both of the suspect low level audio signal circuits and ground.
- If resistance is less than specified value, repair short to ground.
Test for less than 1 ohm between the suspect speaker harness connector both low level audio signal circuits and the suspect radio harness connector.
- If greater than specified value repair open or high resistance.

If all circuits test normal, replace the radio.