Speakers Inoperative - One or More

SPEAKERS INOPERATIVE - ONE OR MORE

DIAGNOSTIC SYSTEM CHECK - ENTERTAINMENT SYSTEM
Always perform the Vehicle Diagnostic System Check before proceeding with these diagnostic procedures. Refer to Diagnostic System Check - Vehicle. Testing and Inspection

ONE SPEAKER INOPERATIVE

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. Component Tests and General Diagnostics

With RPO UZ6
- Speaker output open-Test the appropriate speaker output circuits for an open. Refer to Circuit Testing and Wiring Repairs. Component Tests and General Diagnostics
- No audio output from the radio-Disconnect speaker harness connector from speaker. Turn On the radio and adjust volume approximately 50 percent. Measure the A/C voltage across the speaker harness connector terminals. Replace the speaker if A/C voltage is present.
- If no A/C voltage is present, replace the radio.
- Perform the vehicle identification number (VIN) Relearn procedure with a scan tool. On the scan tool, go to Module Replacement/Setup in Vehicle Control Systems and select Radio.

With RPO U85
1. Speaker output circuit from amplifier open or shorted-Test the appropriate speaker output circuits for an open or short.
2. No low level audio output from the radio-Test for any AC voltage between the appropriate low level output circuits at the amplifier harness connector, disconnected with the radio volume adjusted to an audible level. If no A/C voltage is present, replace the radio.
3. No audio output from the amplifier-Test for any A/C voltage between the appropriate speaker output circuits at the speaker harness connector, disconnected with the radio volume adjusted to an audible level. If A/C voltage is present, replace the speaker. If no A/C voltage is present, replace the amplifier.

SPEAKERS - ONE CHANNEL INOPERATIVE

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. Component Tests and General Diagnostics

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

With RPO U2K
- Audio signal circuit open-Test the appropriate audio signal circuit between the radio and digital radio receiver (DRR) for an open, short to ground, or short to battery.
- No audio output from the DRR-Measure the voltage from the DRR audio signal circuit with the radio ON. Replace the DRR if no voltage is measured.
- No audio input to the radio-Measure the voltage from the radio audio signal circuit with the radio ON. Replace the radio if voltage is measured and symptom is still present.
- After replacing the radio, perform the VIN Relearn procedure. On the scan tool, go to Module Replacement/Setup in Vehicle Control Systems and select Radio.