Table of Contents
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No Global Positioning System (GPS)
Reception
Diagnostic Instructions
• Perform the "Diagnostic System Check - Vehicle
Diagnostic Information: " prior to using this diagnostic
procedure
• Review "Strategy Based Diagnosis: " for an overview
of the diagnostic approach.
• "Diagnostic Procedure Instructions - Vehicle
Diagnostic Information: " provides an overview of
each diagnostic category.
Reference Information
Schematic Reference
"Radio/Navigation System Schematics"
Connector End View Reference
"Entertainment/Communication Connector End Views"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
Circuit/System Testing
NOTE
The global positioning system (GPS) requires
a clear line of sight to the sky to operate
properly. In most cases the GPS will not have
reception near tall buildings or inside
structures.
1. Remove the GPS antenna and cable and place it
outside the vehicle. Verify the GPS reception is
operational within 5 minutes.
➢ If GPS becomes operational, remove any suspect
window tint or objects that may obstruct the GPS
signal.
2. Replace the GPS antenna. Verify the GPS reception
is operational within 5 minutes.
➢ If GPS is not operational, replace the radio.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Control Module References: " for radio replacement,
setup, and programming
• "Global Positioning System (GPS) Antenna
Replacement"
Cellular / Entertainment / Navigation / Audio:
Video Display is Poor or Blank
Diagnostic Fault Information
Perform the "Diagnostic System Check - Vehicle
Diagnostic Information: " prior to using this diagnostic
procedure.
Reference Information
Schematic Reference
"Radio/Navigation System Schematics"
Connector End View Reference
"Entertainment/Communication Connector End Views"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
Scan Tool Reference
"Scan Tool Data List - Cellular, Entertainment, and
Navigation"
Circuit/System Testing
NOTE
If rear video display does not turn ON, use
diagnostic "Video Entertainment System
Inoperative".
1. Flip open the rear video display. With the ignition
ON, operate the rear entertainment system using
several known good DVD disks. Observe the rear
video screen.
➢ If the screen turns on but is blank. Test for an open,
short to ground and short to power on the DVD
video signal circuits to the rear video display. If the
DVD video signal circuits test normal, replace the
video display.
➢ If the video screen is still malfunctioning, replace
the radio.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Video Display Replacement"
• "Control Module References: " for radio replacement,
setup, and programming.
9O-50
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Table of Contents
Troubleshooting
