Schematic Reference: Radio/Navigation System Schematics

DEFINITION: When using the navigation system, the GPS icon does not appear on the navigation radio.

Did you perform Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

1. Park the vehicle in an open area, as far away from buildings as possible.
2. Turn ON the ignition. The Cadillac emblem screen appears on the navigation radio.
3. Press the MAP button on the radio.
4. When the navigation exemption menu appears, click the I AGREE button on the display.
5. The display should show the current position of the vehicle. The GPS icon should appear on the upper left corner of the screen, indicating that the navigation system has proper GPS reception.

Is the system OK?

Go to Testing for Intermittent Conditions and Poor Connections

Go To Step 3

1. Remove the GPS antenna from its location in the Instrument Panel.
2. Place the GPS antenna outside of the vehicle, connected to the navigation module, and positioned horizontally.
3. Turn ON the ignition and turn on the navigation system.

Does the GPS icon appear on the navigation radio?

Go to Step 4

Go to Step 6

Inspect the front windshield for any sticky film, alteration or obstacles.

Is the rear window glass OK?

Go to Step 6

Go to Step 5

Clear any sticky film, alteration or obstacles from the front windshield.

Is the repair complete?

Go to Step 8

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Replace the GPS antenna. Refer to Electronic Navigation Antenna Replacement .

Is the replacement complete?

Go to Step 8

Go to Step 7

Replace the navigation radio. Refer to Control Module References.

Is the replacement complete?

Go to Step 8

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Operate the system to verify the repair.

Is the failure removed?

System OK

Go to Step 3