Part 1

Navigation System Diagnostic Mode

Start-Up Procedure and Diagnostic Menu

There are two ways to enter the diagnostic mode:

Mode 1:

Start the vehicle, and at the disclaimer screen use the navigation hard buttons:

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

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





Mode 2:

Start the vehicle. When the globe screen appears, connect the SCS service connector Navigation System Forced Starting of the Audio-Navigation Unit to the navigation service check connector located by passenger's under-dash fuse/relay box. The screen changes to the System Links screen, and automatically begins running the self diagnosis. See the System Links section for more information.

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

USA models





Canada models





System Links

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

NOTE: The system cannot complete a full diagnosis unless the engine is running.

USA models





Canada models





2. Rotate the interface dial to select the icon you want to diagnose. Press the interface dial 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 diagnosis tests the following:

- Most of the wires connecting the navigation components that are shown in the block diagram.
- The results from the various components shown in the block diagram.
- The audio-navigation unit tests the microphone by listening to the bong sound produced by the audio-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.





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 the ignition switch to ON (II), or press the engine start/stop button to select the ON mode. You may also see this screen if you recently replaced the audio-navigation unit.

When the audio-navigation unit is powered up for the first time at the factory or sometimes when a remanufactured audio-navigation unit is installed, the factory diagnostic 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.





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

- Press and hold the MENU, the MAP/GUIDE, and the CANCEL buttons at the same time until the Select Diagnosis Items screen comes up. Then release the buttons.
- Press and hold the MAP/GUIDE button until the In Line Diag Setting screen appears.
- Set the In Line Diag Setting to Complete, then select Return twice to exit the diagnostic mode.





Detailed Information & Setting

These sections 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 is displayed.





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.






Monitor Check

Overview of the navigation display unit

- The navigation display unit communicates with the audio-navigation unit over its own GA-Net bus. Information sent by the audio-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 the components.

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 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 Picture Is Missing A Color or Tone or Is an Odd Color. If the picture has lines in it or scrolls horizontally, or vertically, troubleshoot for a Composite sync problem Picture Has Lines, Rolls, or is Blurry.





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.






Black Raster

This screen checks for pixels that may be stuck on. The entire display must be black. If pixels are stuck on, replace the navigation display unit Service and Repair.





Color Pattern

This screen shows the colors being used for the map and menu screens. This is for factory use only. To check the color signal, use the RGB Color diagnosis found under the Monitor Check.






White Raster

This screen checks for pixels that may be dead (off). The entire display must be white. If there are dead pixels, replace the navigation display unit Service and Repair.





Monitor Adjustment

This screen allows you to center the navigation display. Use the interface dial to move the picture up/down or left/right. It is unlikely that you will ever need to adjust the monitor position. The Default button will reset the display position to factory specifications.