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 MAP/GUIDE, MENU, and 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 Component Tests and General Diagnostics to the navigation service check connector located by passenger's dash. 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.
With rear entertainment
Without rear entertainment
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.
NOTE: The system cannot complete a full diagnosis unless the engine is running.
With rear entertainment
Without rear entertainment
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 are shown in the block diagram.
- The audio-navigation unit tests the microphone by listening to the long 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). 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.
With rear entertainment
Without rear entertainment
Follow these steps to prevent the screen from showing up in the future:
- Press and hold the MAP/GUIDE, DEST/ROUTE, and 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 diagnostic screens allow you to troubleshoot the navigation display unit. Select the item you want to troubleshoot, and follow the diagnostic instructions.
RGB Color
This diagnostic screen checks 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 Symptom Troubleshooting. If the picture has lines in it or scrolls horizontally, or vertically, troubleshoot for a Composite sync problem Symptom Troubleshooting.
Gray Tone
This diagnostic screen checks 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 diagnostic 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
The diagnostic screen checks 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 diagnostic 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 is for factory use only. The Default button will reset the display position to factory specifications.
