Schematic Reference:
Radio/Audio System Schematics
Connector End Views Reference:
Entertainment Connector End Views
Diagnostic System Check - Vehicle
Always perform the Radio/Audio System Diagnostic System Check before proceeding
with these diagnostic procedures. Refer to
Diagnostic System Check - Vehicle
in Vehicle DTC Information.
Speaker Inoperative - One or More
Without RPO U88
- No audio output from the radio--Test for any AC voltage between the
audio signal circuits at the affected speaker connector with the radio volume adjusted
to 50 percent. If no AC voltage is present, check for shorts to battery positive
voltage or shorts to ground on all affected speaker output circuits from the radio.
If no shorts are located, replace the radio. Refer to
Control Module References
in Computer/Integrating Systems for replacement,
setup, and programming.
- Speaker output open--Test the appropriate speaker outputs for an
open. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems.
- Defective speaker--Replace the appropriate speaker. Refer to
Speaker Replacement Reference
.
With RPO U88
- Speaker output from amplifier open--Test the appropriate speaker
outputs for an open. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems.
- Defective speaker--Replace the appropriate speaker. Refer
to
Speaker Replacement Reference
.
- No audio output from the radio--Test for any AC voltage between the
audio signal circuits at the affected speaker connector with the radio volume adjusted
to 50 percent. If no AC voltage is present, check for shorts to battery positive voltage
or shorts to ground on all affected speaker output circuits from the radio. If no
shorts are located, replace the radio. Refer to
Control Module References
in Computer/Integrating Systems for replacement, setup,
and programming.
- No audio output from the amplifier--Test for any AC voltage between
the audio signal circuits at the affected speaker connector with the radio volume
adjusted to 50 percent. If no AC voltage is present, check for shorts to battery positive
voltage or shorts to ground on the affected speaker outputs. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems. If no shorts are located, replace the amplifier.
Refer to
Radio Speaker Amplifier Replacement
.