Part 1

Navigation System Diagnostic Mode

Start-Up Procedure and Diagnostic Menu

NOTE: Check the vehicle battery condition first Battery Test.

There are two ways to enter the diagnostic mode:

Mode 1:

Start the vehicle, and at the disclaimer screen use the navigation display hard buttons as described below:

Press and hold the MAP/GUIDE, MENU, and CANCEL, buttons for about 3 seconds. The display screen goes directly to the Select Diagnosis Items menu shown below.

- Self-Diagnosis Mode (runs the automatic diagnosis of the navigation system)
- Detail Information & Setting (allows you to manually diagnose the navigation system)





Mode 2:

Start the vehicle. When the globe screen appears, connect the SCS service connector Forced Starting of the Navigation Unit to the navigation service connector located behind the navigation unit. The screen changes to the System Links screen and automatically begins running the self diagnostic. See the System Links section for more information.

NOTE: When finished troubleshooting, make sure to remove the SCS service connector.

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System Links

1. Enter this screen by connecting the SCS service connector or by selecting Self Diagnosis Mode from the navigation screen main menu. The message at the bottom of the screen flashes indicating the diagnosis is running. Make sure you enter the audio anti-theft code.

NOTE:

- The system cannot complete a full diagnosis unless the engine is running.
- DTC 2703 can be stored when the ignition switch is at ACCESSORY (I). With the ignition switch in ACCESSORY (I), the climate control unit is turned off and the navigation unit loses communication and stores DTCs. Therefore, there is a possibility that the system is normal even though DTC 2703 is stored. Check system links with the engine running, and if it appears normal, the system is OK at this time.

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2. Rotate the interface dial to select the icon you want to diagnose. Push in the selector to see the details of that diagnostic function.

The System Links function runs automatically and displays a flashing message at the bottom of the screen reminding you to have the engine running for the test. The diagnostic tests the following:

- Most of the wires connecting the navigation components are shown in the block diagram.
- The results from the various components shown in the block diagram.
- The microphone is tested by listening to the bong sound produced by the navigation unit from the speakers when the diagnosis is started. This requires that the audio system be operating normally.

When the diagnosis finishes, the icons turn different colors based on their test status. The color definitions are shown below and can also be seen by selecting Help on the System Links screen.

The indication on the screen may not change until you exit and reenter the Self-Diagnosis mode. In some cases, you may have to restart the engine for the indication to change. After you repair the affected component or harness, repeat this diagnosis.

Each icon color is explained in the table below.





NOTE: By selecting the HELP icon, you can see a description for each color.

Icon Color Information














Factory Diagnostic Screen In Line Diag

NOTE: If the vehicle left the factory in the factory diagnostic mode, you will see this screen every time you turn on the ignition. You may also see this screen if you recently replaced the navigation unit.

When a navigation unit is powered up for the first time at the factory or after replacement with a new or remanufactured navigation unit, the factory diagnosis screen (In Line Diag) appears. Normally the factory does the steps necessary to verify proper operation and terminate the factory diagnosis.

Until the proper confirmation sequence is done, the screen appears every time the vehicle is started.

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Follow the steps below to prevent the screen from showing up in the future:

- Press and hold the MENU, MAP/GUIDE, and CANCEL buttons for about 3 seconds. The Select Diagnosis items screen appears.
- Press and hold the MAP/GUIDE button for about 5-10 seconds. A screen with a Complete button, appears.
- Press Complete, then Return, and then shut the key off for 5 seconds. Do not disconnect the battery during this period as the unit is saving the setting to the SRAM memory. The In Line Diag should not appear again.
- Restart the vehicle, and confirm normal operation by completing the TQI of the Navigation System Service Bulletin.

Detailed Information & Settings

These section allow you to run a specific diagnosis and allows additional setting choices for some screens that are not shown when selecting an icon from the System Links screen.

When you select the Detail Information & Setting menu, the main diagnosis menu appears.





After the display changes to the Diagnostic Menu, select the item you want to check, and the test begins. To return to the previous screen, select Return.

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Monitor Check

Overview of navigation display unit

- The navigation display unit communicates with the navigation unit over its own GA-Net bus. Information sent by the navigation unit to the navigation display unit includes commands to control the LCD back light.
- The security system protects the navigation display unit by daisy-chaining the security signal through it, and then passing the signal to the audio unit.
- The illumination input from the gauge brightness control provides back lighting for the buttons surrounding the screen.

These screens allow you to troubleshoot the navigation display unit. Select the item you want to troubleshoot, and follow the diagnostic instructions.






RGB Color

This screen verifies that the navigation display unit is receiving the video (R, G, B and Composite sync) signals properly. The three primary colors should all appear without distortion. The combination of all three should produce a central white section. If any of the colors are missing, troubleshoot for the color signal. If the picture has lines in it or scrolls horizontally, or vertically, troubleshoot for a Composite sync problem Symptom Troubleshooting.





Gray Tone

This screen diagnoses problems with contrast. You should be able to see the changes from bar to bar across the scale. It is normal for the two bars on either side to appear the same. If you can't see changes from bar to bar, replace the navigation display unit Service and Repair.