Speakers Inoperative - All
Speakers Inoperative - All
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
Reference Information
Schematic Reference
Radio/Navigation System Schematics (Radio/Navigation System Schematics)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Radio/Audio System Description and Operation (Radio/Audio System Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning)
Special Tools
J 39916-A CD Diagnostic Audio Kit
Circuit/System Testing
Important: Diagnose and repair any serial data communication DTCs before performing this diagnostic.
Without Amplifier
1. Ignition ON and radio ON, adjust the volume, balance and fade adjustment on the radio.
• If adjustment of the fade and balance eliminates the concern, review the operation of the radio with the customer.
2. If inoperative audio on all speakers persists, replace the radio.
With Amplifier
1. Ignition ON and radio ON, adjust the volume, balance and fade adjustment on the radio.
• If adjustment of the fade and balance eliminates the concern, review the operation of the radio with the customer.
2. Ignition OFF, disconnect the X3 (U87) or X1 (UQ3) amplifier harness connector.
3. Ignition ON and radio ON, test for AC voltage between the left front low level audio signal (+) terminal 1 (U87) or 15 (UQ3) and left front low level audio signal (-) terminal 8 (U87) or 7 (UQ3).
• If AC voltage is not present, replace the radio.
4. Test for greater than 9 volts at the amplifier harness connector radio audio mute signal circuit, X3 terminal 7 (U87), X1 terminal 11 (UQ3).
• If less than specified value repair short to ground or open/high resistance or replace the radio.
5. Ignition OFF, disconnect the amplifier connector harness X1.
6. Test for less than 1 ohm between the X3 amplifier harness connector terminal 8 and ground.
• If greater than specified value repair open circuit.
7. Test for greater than 10 volts on X3 amplifier harness connector terminal 4.
• If less than specified value repair short to ground or open/high resistance.
8. If all circuits test normal, replace the amplifier.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Control Module References (Programming and Relearning) for amplifier and radio replacement
* Speaker Replacement Reference (Speaker Replacement Reference)