Schematic Reference:
Radio/Audio System Schematics
Diagnostic System Check - Entertainment System
Always perform the Entertainment System Diagnostic System Check before proceeding
with these diagnostic procedures. Refer to
Diagnostic System Check - Vehicle
in Vehicle DTC Information.
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
Testing for Intermittent Conditions and Poor Connections
and
Connector Repairs
in Wiring Systems.
With RPO U96
- Speaker output shorted--Test all speaker outputs for a short. Refer
to
Circuit Testing
and
Wiring Repairs
in Wiring Systems.
- Defective radio--Replace the radio. Refer to
Radio Replacement
.
With RPO UQ3
- 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
in Wiring Systems.
- Low level audio signal circuit shorted--Test all low level audio
signal circuits for a short to ground or short to voltage. Refer to
Circuit Testing
and
Wiring Repairs
in
Wiring Systems.
- Radio ON signal circuit open or shorted to ground--Test the radio
ON signal circuit for an open or short to ground. Refer to
Circuit Testing
and
Wiring Repairs
in
Wiring Systems.
- Entertainment and comfort serial data circuit shorted to voltage--Test
the entertainment and comfort serial data circuit for a short to voltage. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems.
- No low level audio output from the radio--Test for any AC voltage
between the left front low level audio signal circuits at the amplifier harness connector,
disconnected with the radio volume adjusted to 50 percent. If no AC voltage
is present, replace the radio. Refer to
Radio Replacement
.
- 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
Testing for Intermittent Conditions and Poor Connections
and
Connector Repairs
in Wiring Systems.
With RPO U96
- Speaker output open--Test the appropriate speaker output circuits
for an open. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems.
- 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 an audible level. If AC voltage is present, replace
the speaker. Refer to
Speaker Replacement Reference
.
If no AC voltage is present, replace the radio. Refer to
Radio Replacement
.
With RPO UQ3
- Speaker output circuit from amplifier open or shorted--Test the appropriate
speaker output circuits for an open or short. Refer to
Circuit Testing
and
Wiring Repairs
in
Wiring Systems.
- Low level audio circuit open--Test the appropriate low level audio
circuit for an open. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems.
- No low level audio output from the radio--Test for any AC voltage
between the appropriate low level audio signal circuits at the amplifier harness connector,
disconnected with the radio volume adjusted to an audible level. If no AC voltage
is present, replace the radio. Refer to
Radio Replacement
.
- 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 an audible level. 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
.
All Speakers on One Channel Inoperative Only on Digital Radio
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
Testing for Intermittent Conditions and Poor Connections
and
Connector Repairs
in Wiring Systems.
- Right or left audio signal circuit open or shorted--Test all audio
signal circuits for an open or short. Refer to
Circuit Testing
and
Wiring Repairs
in
Wiring Systems.
- No audio output from the digital radio receiver--Replace the digital
radio receiver. Refer to
Digital Radio Receiver Replacement
.
All Speakers Inoperative Only on Digital Radio
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
Testing for Intermittent Conditions and Poor Connections
and
Connector Repairs
in Wiring Systems.
- Right or left audio signal circuit shorted to battery positive voltage--Test
all audio signal circuits for a short to battery positive voltage. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems.
- No audio output from the digital radio receiver--Replace the digital
radio receiver. Refer to
Digital Radio Receiver Replacement
.
Speakers - Reduced Volume
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
in Wiring Systems.
With RPO U96
- Speaker output circuit high resistance--Test the appropriate speaker
output circuits for high resistance. Refer to
Circuit Testing
and
Wiring Repairs
in
Wiring Systems.
- Defective speaker--Replace the appropriate speaker. Refer to
Speaker Replacement Reference
.
With RPO UQ3
- Speaker output circuit high resistance--Test the appropriate speaker
output circuits for high resistance. Refer to
Circuit Testing
and
Wiring Repairs
in
Wiring Systems.
- Low level audio circuit open--Test the appropriate low level audio
circuit for an open. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems.
- Defective speaker--Replace the appropriate speaker. Refer
to
Speaker Replacement Reference
.