Part One

Navigation System Diagnostic Mode

Start-up procedure and Diagnostic Menu

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

Make sure the battery is in good condition, then press and hold the three buttons MAP/GUIDE, MENU, and CANCEL, 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 (allows you to manually diagnose the navigation system)





System Links

1. 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.

2. Select the icon you want to diagnose. Select the icon 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 shown in the block diagram.

- The results from the various components shown in the block diagram.

- The microphone is tested 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 on the ignition. You may also see this screen if you recently replaced the audio-navigation unit.

When a audio-navigation unit is powered up for the first time at the factory or after replacement with a new or remanufactured audio-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.






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

- Press and hold the buttons (MENU, MAP/GUIDE, and CANCEL) for about 3 seconds. The Select Diagnosis items screen appears.

- Press and hold the MAP/GUIDE button for 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 allows 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 menu item Detail Information & Setting menu, the main diagnosis menu is displayed.






Monitor Check

Overview of display 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. 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 the picture has lines in it, or scrolls horizontally or vertically, and any of the colors are missing, troubleshoot for a composite sync and color signal 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 audio-navigation unit. Audio-Navigation Unit Removal/Installation (With Navigation)






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 audio-navigation unit. Audio-Navigation Unit Removal/Installation (With Navigation)






Touch Panel Check 1

The panel touch sensing system consists of a touch sensitive resistive membrane covering the display. Contrary to other systems using infrared beams, the screen has to be physically touched to make it work. The display has the capability of 479 touch locations (left to right), and 233 touch locations (top to bottom). The upper left hand corner is position (0, 0) and the lower right hand corner is (479, 233) as displayed. Touching anywhere on the screen displays the coordinate of the location, and a + icon appears where you touched the screen. If any area of the screen either doesn't respond, or responds at some other location when touched, then replace the audio-navigation unit. Audio-Navigation Unit Removal/Installation (With Navigation)

NOTE: Unlike earlier screens that used infrared sensors, direct sunlight does not affect this test.






Touch Panel Calibration

The display screen uses a touch sensitive membrane. This means that every location of the entire surface of the display is touch sensitive. This diagnosis allows alignment of these touch locations with the location of the buttons images on the screen.

Normally this should never need adjustment, and is used only to adjust the touch locations for parallax (the touch locations appear different when viewed at an angle). However, if an adjustment is necessary, follow this procedure:

- The screen consists of the + button icons. Touch the center of the five + buttons on order 1-5.

- To store any change you make, touch the Set button.

- Use the Return key to exit the diagnosis.





Color Pattern

The chart below 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 diagnostic screen checks for pixels that may be dead (off). The entire display must be white. If there are dead pixels, replace the audio-navigation unit. Audio-Navigation Unit Removal/Installation (With Navigation)






Monitor Adjustment

This allows you to center the navigation display. Use the joystick 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 resets the display position to factory specifications. The factory default is (0, 0). The H-POS button is for factory use only.






Touch Panel Check 2

If you touch the any icons on the screen, the icon color changes while pressing the icon. If any icons of the screen doesn't respond, replace the audio-navigation unit. Audio-Navigation Unit Removal/Installation (With Navigation)






Unit Check (Quick Check)

Some of the tests and screens that are displayed under the Unit Check are different from the more detailed checks listed in other areas.

To start the test, select the item you want to check.

- Display

- Radio

- GPS

- ECU Info.

- Rear Camera

- PC Card Info

- Hard Key

- Yaw Sensor

- DVD

- HFL

- XM





Display

This diagnosis does additional checks on the communication bus between the navigation ECU and the navigation display. In addition, this test checks the internal electronic functions.

If the connection is NG, replace the audio-navigation unit. Audio-Navigation Unit Removal/Installation (With Navigation)

- Connection verifies internal communications.

- Version represents the software version for the display.