GM Service Manual Online
For 1990-2009 cars only

Navigation System Check 98

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Turn ignition switch to the RUN position.

Navigation Display Module displays the Cadillac emblem.

Navigation System Display Inoperative

2

    â€¢ Turn ignition switch to the OFF position.
    â€¢ Open the driver's side door.

Navigation Display Module turns off.

Navigation System Display Always On

3

    â€¢ Turn ignition switch to the RUN position.
    â€¢ Select Display Guidance under NAV MENU options.
    â€¢ Test drive vehicle with Navigation System operating.
    â€¢ Clear map display.
    â€¢ Clear map color.

4

    â€¢ Select Voice Guidance under NAV MENU options.
    â€¢ Test drive vehicle with Navigation System operating.
    â€¢ Voice commands should guide route.
    â€¢ Clear voice commands.
    â€¢ Voice commands from right speakers.
    â€¢ Voice commands from left speakers.

5

Select TV under AUDIO/TV MENU options.

Clear TV display.

Navigation System - Poor or Inoperative TV Reception

6

    â€¢ Select TV under AUDIO/TV MENU options.
    â€¢ Connect VCR to the Aux RCA Video Jacks.
    â€¢ Select AUX VIDEO under TV SELECTIONS MENU options.
    â€¢ VCR selection should appear on Navigation Display Module.
    â€¢ Clear VCR picture display.
    â€¢ Clear VCR audio.
    â€¢ Clear VCR audio from right speakers.
    â€¢ Clear VCR audio from left speakers.

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.