Schematic Reference:
Radio/Audio System Schematics
Diagnostic System Check - Entertainment System
Always perform the Vehicle Diagnostic System Check before proceeding with these
diagnostic procedures. Refer to
Diagnostic System Check - Vehicle
in Vehicle DTC Information.
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 UW4 and UZ6
| • | Speaker output open -- Test the appropriate speaker output circuits
for an open. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems. |
| • | Perform the VIN Relearn procedure with a scan tool. On the scan tool,
go to Module Replacement/Setup in Vehicle Control Systems and select Radio. |
With RPO UK6 (Rear Speakers Only)
| • | Speaker output open - Test the appropriate speaker output circuits between
the radio and rear seat audio (RSA) module for an open. Test the appropriate speaker
output circuits between the RSA module and rear speaker for an open. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring
Systems. |
| • | No audio output from the RSA module - Disconnect the speaker harness connector
from one rear speaker. Turn ON the radio and adjust volume approximately 50 percent.
Turn OFF the RSA power switch. Measure the AC voltage across both terminals of the
speaker harness connector. Replace the speaker if AC voltage is present. Refer to
Radio Rear Speaker Replacement
. |
| • | No AC voltage is present - Disconnect the RSA module connector. Bypass
the RSA module by connecting two fused jumper wires between the appropriate speaker
output circuits from the radio and RSA module. Turn ON the radio. Replace the RSA
module if sound is heard from the rear speaker. Refer to
Rear Seat Audio Control Replacement
.
Replace the radio if no sound is heard from the rear speaker. Refer to
Radio Replacement
. |
| • | After replacing the radio, perform the VIN relearn procedure with a scan
tool. On the scan tool, go to Module Replacement/Setup in Vehicle Control Systems
and select Radio. |
With RPO U32 (Rear Speakers Only)
| • | No audio output from the DVD player - Turn ON the radio. Turn OFF the
DVD player. With a scan tool, observe the rear speakers relay command parameter.
Replace the DVD player if the parameter displayed is Speakers Off. Refer to
Video Disc Player Replacement
. Go to next step if the displayed parameter is Speakers
On. |
| • | Speaker output open - Test the appropriate speaker output circuits between
the radio and DVD player for an open. Test the appropriate speaker output circuits
between the DVD player and rear speaker for an open. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems. |
| • | No audio output from the DVD player - Disconnect the speaker harness connector
from one rear speaker. Turn ON the radio and adjust volume approximately 50 percent.
Turn OFF the DVD player. Measure the AC voltage across both terminals of the speaker
harness connector. Replace the speaker if AC voltage is present. Refer to
Radio Rear Speaker Replacement
. |
| • | No AC voltage is present - Disconnect the DVD player connector C1. Bypass
the DVD player by connecting two fused jumper wires between the appropriate speaker
output circuits from the radio and DVD player. Turn ON the radio. Replace the DVD
player if sound is heard from the rear speaker. Refer to
Video Disc Player Replacement
.
Replace the radio if no sound is heard. Refer to
Radio Replacement
. |
| • | After replacing the radio, perform the VIN relearn procedure with a scan
tool. On the scan tool, go to Module Replacement/Setup in Vehicle Control Systems
and select Radio. |
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
Testing for Intermittent Conditions and Poor Connections
and
Connector Repairs
in
Wiring Systems.
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 circuit
between the radio and digital radio receiver (DRR) for an open, short to ground, or
short to battery. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems. |
| • | No audio input to the radio - Measure the voltage from the radio audio
signal circuit with the radio ON. Replace the radio if voltage is measured and symptom
is still present. Refer to
Radio Replacement
. |
| • | After replacing the radio, perform the VIN Relearn procedure. On the
scan tool, go to Module Replacement/Setup in Vehicle Control Systems and select Radio. |
With RPO U32
| • | Audio signal circuit open - Test the appropriate audio signal circuit
between the radio and DVD player for an open, short to ground, or short to battery.
Refer to
Circuit Testing
and
Wiring Repairs
in
Wiring Systems. |
| • | No audio output from the DVD player - Measure the voltage from the DVD
player audio signal circuit with the radio ON. Replace the DVD player if no voltage
is measured. Refer to
Video Disc Player Replacement
. |
| • | No audio input to the radio - Measure the voltage from the radio audio
signal circuit with the radio ON. Replace the radio if voltage is measured and symptom
is still present. Refer to
Radio Replacement
. |
| • | After replacing the radio, perform the VIN Relearn procedure. On the
scan tool, go to Module Replacement/Setup in Vehicle Control Systems and select Radio. |
