Digital Radio Poor or No Reception
|
Digital Radio Poor or No Reception
|
Circuit/System Description
|
The digital radio receiver, located inside the radio, receives digital radio information from the digital radio antenna located on the outside of the vehicle. The digital radio receiver is connected to the digital radio antenna via a shielded coax cable.
Schematic Reference
Radio/Navigation System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Radio/Audio System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
Special Tools
EL-48028 Digital Radio Test Antenna
Circuit/System Verification
|
1.
|
Tune to a strong AM or FM station and verify each speaker is producing clear and even sound, with no distortion.
|
2.
|
If any speaker is not producing sound or the sound produced is distorted, refer to
Speaker Malfunction
.
|
3.
|
With the vehicle outside in an area with an unobstructed view of the southern sky, tune to XM. Verify XM reception is clear and the No XM Signal message is not displayed on the radio.
|
1.
|
Ignition OFF, disconnect the digital radio antenna coax from the radio. Connect the EL-48028 to the radio and place on the roof of the vehicle. Move the vehicle outside in an area with an unobstructed view of the southern sky.
|
2.
|
Ignition ON, radio tuned to XM channel 1, verify XM reception is clear and uninterrupted.
|
3.
|
If reception is not clear, replace the radio.
|
4.
|
Ignition OFF, reconnect the antenna coax cable at the radio. Disconnect the antenna coax cable from the digital radio antenna.
|
5.
|
Ignition ON, radio ON, test for 4.5-5.5 V between the antenna coax cable center terminal and outer shield.
|
6.
|
If less than the specified range, test the antenna coax cable for an open/high resistance.
|
7.
|
If greater than the specified range, test the antenna coax cable for a short to voltage.
|
8.
|
If all circuits test normal, replace the digital radio antenna.
|
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.