Schematic Reference:
Radio/Navigation System Schematics
Connector End View Reference:
Entertainment/Communication Connector End Views
Preliminary Information
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 to
Connector Repairs
.
Perform the
Diagnostic System Check - Vehicle
.
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
Circuit Testing
and
Wiring Repairs
.
With RPO UQ7
- Battery positive voltage circuit to the amplifier open. Test the battery positive voltage circuit to the amplifier for an open. Refer to
Circuit Testing
and
Wiring Repairs
.
- Ground circuit to the amplifier open. Test the ground circuit to the amplifier for an open. Refer to
Circuit Testing
and
Wiring Repairs
.
Important: With RPO Y91, Bose amplifier, perform the setup procedure for the amplifier. Refer to
Audio Amplifier Setup
.
- No audio output from the amplifier. Replace the amplifier. Refer to
Radio Speaker Amplifier Replacement
.
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
Circuit Testing
and
Wiring Repairs
.
Without RPO UQ7
- Speaker output open. Test the appropriate speaker output circuits for an open. Refer to
Circuit Testing
and
Wiring Repairs
.
Important: The radio must be programmed after replacement. Refer to
Radio Setup
.
- 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. Refer
to
Speaker Replacement Reference
. If no AC voltage is present, replace the radio. Refer to
Control Module References
.
With RPO UQ7
- Speaker output circuit from amplifier open. Test the appropriate speaker output circuits for an open. Refer to
Circuit Testing
and
Wiring Repairs
.
Important: With RPO Y91, Bose amplifier, perform the setup procedure for the amplifier. Refer to
Audio Amplifier Setup
.
- 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.
Refer to
Speaker Replacement Reference
. If no AC voltage is present, replace the amplifier. Refer to
Radio Speaker Amplifier Replacement
.
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
Circuit Testing
and
Wiring Repairs
.
With RPO UQ7
Important: With RPO Y91, Bose amplifier, perform the setup procedure for the amplifier. Refer to
Audio Amplifier Setup
.
- Speaker output circuit from amplifier shorted. Test the appropriate speaker output circuits for a short to ground or short to voltage. Refer to
Circuit Testing
and
Wiring Repairs
.
- Replace the amplifier. Refer to
Radio Speaker Amplifier Replacement
.
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 for an open. Refer to
Circuit Testing
and
Wiring Repairs
.
- No audio output from the digital radio receiver. Replace the digital radio receiver. Refer to
Digital Radio Receiver Replacement
and
Digital Radio Receiver Setup
.
- No digital output from the radio. Replace the radio. Refer to
Control Module References
.