For 1990-2009 cars only
Schematic Reference: Radio/Audio System Schematics
Connector End Views Reference: Entertainment Connector End Views
Diagnostic System Check - Vehicle
Always perform the Radio/Audio System Diagnostic System Check before proceeding with these diagnostic procedures. Refer to Diagnostic System Check - Vehicle in Vehicle DTC Information.
Important: The following information lists the most probable cause of the concern to the least probable cause followed by the appropriate test for that condition. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with the replacement. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Without RPO U65
| • | Speaker output circuit resistance high -- Test the appropriate speaker output circuits for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. |
| • | Defective Speaker -- Replace the appropriate speaker. Refer to Speaker Replacement Reference . |
With RPO U65
| • | Speaker output circuit resistance high -- Test the appropriate speaker output circuits from the amplifier for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. |
| • | Low level audio circuit open -- Test the appropriate low level audio output circuits from the radio to the amplifier for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. |
| • | Defective speaker -- Replace the appropriate speaker. Refer to Speaker Replacement Reference . |
