Schematic Reference: Radio/Navigation System Schematics
Connector End Views Reference: Entertainment/Communication 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 .
Speakers - Distortion
Important: The following information lists the most probable cause of the concern to the least probable cause. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with replacement. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
With RPO U56 or U42
Audio output signal circuit from DVD player open. Test left, right, and common remote playback device signal circuits for opens, shorts to ground, or shorts to battery positive.
With Radio or CD/MP3 Player
- Audio output circuit to speaker open. Test affected speaker audio (+) and audio (-) circuits for an open. Refer to Circuit Testing and Wiring Repairs .
- Defective speaker. Replace the appropriate speaker. Refer to Speaker Replacement Reference .
With RPO U2K
Audio output signal circuit from digital radio receiver open. Test left, right, and audio common signal circuits for opens. Refer to Circuit Testing and Wiring Repairs .
