GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Navigation System Schematics

DEFINITION: The navigation voice recognition is inoperative.

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Turn ON the ignition.
  2. Press the radio MENU button on the radio.
  3. When the navigation disclaimer screen appears, press the I AGREE button on the display.
  4. Press the MAP button on the radio. The display should show the current position of the vehicle. The navigation map should be clear and have clear color.
  5. Press the voice switch on the radio. Speak a valid voice command. The system should repeat your command and then perform the function.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Test the cellular microphone signal circuit and the drain wire circuit for the following:

    • An open
    • A short to ground
    • A short to voltage

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 6

Go to Step 4

4

Inspect for poor connections at the harness connector of the navigation radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 6

Go to Step 5

5

Replace the navigation radio. Refer to Control Module References .

Did you complete the replacement?

Go to Step 6

 

6

Operate the system to verify the repair.

Does the system operate properly?

System OK

Go to Step 3