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

    • Turn ignition switch to the OFF position.
    • Open the driver's side door.

Navigation Display Module turns off.

Navigation System Display Always On

3

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

4

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

5

Select TV under AUDIO/TV MENU options.

Clear TV display.

Navigation System - Poor or Inoperative TV Reception

6

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

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