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Home >> Cadillac >> 2006 >> CTS Base, 2.8 T, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> No Global Positioning System (GPS) Reception
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No Global Positioning System (GPS) Reception

WARNING: This page is about a different car, the 2007 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
No Global Positioning System (GPS) Reception

Step Action Yes No
Schematic Reference:  Radio/Navigation System Schematics  
Connector End View Reference: Entertainment/Communication Connector End Views 
DEFINITION: When using the navigation system, the GPS icon does not appear on the navigation radio.
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Move the vehicle to an open area outside of the building.
  2. Turn ON the ignition with the engine OFF. The Cadillac emblem screen appears on the navigation radio.
  3. Press the NAV button on the radio.
  4. When the navigation disclaimer screen appears, press the I AGREE button on the display.
  5. The display should show the current position of the vehicle.
Does the system operate normally?		 Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3 From the Navigation Menu screen, select GPS INFO.
Does the system have global positioning system (GPS) reception with four or more satellites?		 Go to Step 9  Go to Step 4 
4 Leave the vehicle outside with the ignition ON or set to ACC for 30 minutes.
 
Does the system have GPS reception with four or more satellites?		 Go to Step 9  Go to Step 5 
5
  1. Remove the GPS antenna from its location.
  2. Place the GPS antenna outside of the vehicle, connected to the navigation radio, and positioned horizontally.
  3. Turn ON the ignition and turn ON the navigation system.
Does the system have GPS reception with four or more satellites?		 Go to Step 6  Go to Step 7 
6
  1. Inspect the front window glass for tinting, alterations, or obstructions.
  2. Remove any tinting, alterations, or obstructions found.
Did you find and correct the condition?		 Go to Step 9  Go to Step 7 
7 Replace the GPS antenna. Refer to Global Positioning System (GPS) Antenna Replacement .
Did you complete the replacement?		 Go to Step 9  Go to Step 8 
8 Replace the navigation radio. Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?		 Go to Step 9  -
9 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 3 
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