Reduced Volume - One or More Speakers

REDUCED VOLUME - ONE OR MORE SPEAKERS

SCHEMATIC REFERENCE: Radio/Audio System Schematics
CONNECTOR END VIEW REFERENCE: Entertainment Connector End Views

DIAGNOSTIC SYSTEM CHECK - VEHICLE

Always perform the Diagnostic System Check - Vehicle before proceeding with these diagnostic procedures. Refer to Diagnostic System Check - Vehicle in Vehicle DTC Information. Diagnostic System Check - Vehicle

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.

With RPO UQ2
1. Speaker output circuit high resistance-Test the appropriate speaker output circuits for high resistance.
2. Defective speaker-Replace the appropriate speaker.

With RPO U85
1. Speaker output circuit high resistance-Test the appropriate speaker output circuits for high resistance.
2. Gain control signal circuit short to ground-Test the gain control signal circuit for a short ground.
3. Low level audio circuit open-Test the appropriate low level audio circuit for an open.
4. Defective speaker-Replace the appropriate speaker.

IMPORTANT: The following procedure assumes all speakers are operative for all modes of operation except digital radio.

With RPO U2K or U2L
1. Audio common circuit open or short to battery positive voltage-Test the audio common circuit for an open or short to battery positive voltage.
2. No audio output from the digital radio receiver-Replace the digital radio receiver.
3. No digital radio audio output from the radio-Replace the radio.