Speakers Inoperative - One or More
Schematic Reference: Radio/Audio System Schematics (Base/Uplevel Radio - UQ3/UQ5)Radio/Audio System Schematics (Premium Radio - UQ7 w/oY91)Radio/Audio System Schematics (Luxury Radio - UQ7 w/ Y91).
Preliminary Information
Perform the Diagnostic System Check - Radio, Stereo, and Compact Disc.
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 Diagnostic Aids for Circuit Testing and Wiring Repair procedures.
All Speakers Inoperative
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 Diagnostic Aids for Circuit Testing and Wiring Repair procedures.
With RPO UQ7
1. Battery positive voltage circuit to the amplifier open. Test the battery positive voltage circuit to the amplifier for an open. Refer to Diagnostic Aids for Circuit Testing and Wiring Repair procedures.
2. Ground circuit to the amplifier open. Test the ground circuit to the amplifier for an open. Refer to Diagnostic Aids for Circuit Testing and Wiring Repair procedures.
3. No audio output from the amplifier. Replace the amplifier.
IMPORTANT: With RPO Y91, Bose amplifier, perform the setup procedure for the amplifier. Refer to Audio Amplifier Setup.
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 Diagnostic Aids for Circuit Testing and Wiring Repair procedures.
Without RPO UQ7
1. Speaker output open. Test the appropriate speaker output circuits for an open. Refer to Diagnostic Aids for Circuit Testing and Wiring Repair procedures.
2. No audio output from the radio. Test for any AC voltage between the appropriate speaker output circuits at the speaker harness connector, disconnected with the radio volume adjusted to 50 percent. If AC voltage is present, replace the speaker. If no AC voltage is present, replace the radio.
IMPORTANT: The radio must be programmed after replacement. Refer to Service Programming System (SPS) (Remote Procedure)Service Programming System (SPS) (Pass-Thru Procedure)Service Programming System (SPS) (Off Board Remote Procedure)Service Programming System (SPS) (Off Board Pass-Thru Procedure) in Programming.
With RPO UQ7
1. Speaker output circuit from amplifier open. Test the appropriate speaker output circuits for an open. Refer to Diagnostic Aids for Circuit Testing and Wiring Repair procedures.
2. No audio output from the amplifier. Test for any AC voltage between the appropriate speaker output circuits at the speaker harness connector, disconnected with the radio volume adjusted to 50 percent. If AC voltage is present, replace the speaker. If no AC voltage is present, replace the amplifier.
IMPORTANT: With RPO Y91, Bose amplifier, perform the setup procedure for the amplifier. Refer to Audio Amplifier Setup.
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 Diagnostic Aids for Circuit Testing and Wiring Repair procedures.
With RPO UQ7
1. Speaker output circuit from amplifier shorted. Test the appropriate speaker output circuits for a short to ground or short to voltage. Refer to Diagnostic Aids for Circuit Testing and Wiring Repair procedures.
IMPORTANT: With RPO Y91, Bose amplifier, perform the setup procedure for the amplifier. Refer to Audio Amplifier Setup.
2. Replace the amplifier.