Part 1
Navigation System Diagnostic Mode
Start-Up Procedure and Diagnostic Menu
1. 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. Select Self-Diagnosis Mode from the navigation screen main menu. The message at the bottom of the screen flashes indicating the diagnostic is running. Make sure you enter the anti-theft code.
2. 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 external 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 diagnostic is started. This requires that the audio system be operating normally.
When the diagnostic 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 diagnostic.
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. Sometimes this screen also appears after you replace the audio-navigation unit with a new or remanufactured unit.
When an audio-navigation unit is powered up for the first time at the factory, the factory diagnosis screen (In Line Diag) appears. Normally the factory does the steps necessary to verify proper operation and terminate the factory diagnostic.
Until the proper confirmation sequence is done, the screen appears every time the vehicle is started.
Follow the steps below to prevent the screen from showing up in the future:
- Press and hold the MENU, the MAP/GUIDE, and the CANCEL buttons 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 turn the ignition switch to LOCK (0) 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 PDI of the Navigation System Service Bulletin.
Detailed Information & Settings
This section allows you to run a specific diagnostic 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.
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 navigation display.
The illumination input from the gauge brightness control with the headlights on 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
- Gray Tone
- Black Raster
- Touch Panel Check 1
- Touch Panel Calibration
- Color Pattern
- White Raster
- Monitor Adjustment
- Touch Panel Check 2
RGB Color
This screen verifies that the navigation display 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 the color signal. If the picture has lines in it or scrolls horizontally, or vertically, troubleshoot for a Composite sync problem Picture Has Lines/Rolls/Other Issues or Is an Odd Color.
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.
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.
Touch Panel Check 1
The panel touch sensing system consists of a touch sensitive resistive membrane covering the display. 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 cause the place you touch to display a + icon. 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.
NOTE:
- Unlike earlier screens that used infrared sensors, direct sunlight does not affect this test.
- A box appears after you touch the screen.
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 diagnostic allows alignment of these touch locations with the location of the buttons images on the screen.
This should never need adjustment, and is used only by the factory to adjust the touch locations for parallax (the touch locations appear different when viewed at an angle). If you are directed to make an adjustment by the factory or other service information, 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 diagnostic.
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 diagnostic 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.
Monitor Adjustment
This allows you to center the navigation display. This is for factory use. Use this procedure only if you are directed by the factory, or other service information like a service bulletin, 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 will reset 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 any icons on the screen, the icon color changes while pressing the icon. If any icons on the screen don't respond, replace the audio-navigation unit Audio-Navigation Unit Removal/Installation.
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 of this service information.
To start the test, select the item you want to check.
- Display
- Radio
- GPS
- ECU Info.
- HFL
- Hard Key
- Yaw Sensor
- DVD
- Aircon
- PC Card Info
Display
This diagnosis does additional checks on the communication bus between the navigation CPU and the navigation display. In addition, this test checks the internal electronic functions and the touch screen operation.
If the connection is NG, replace the audio-navigation unit Audio-Navigation Unit Removal/Installation.
- Connection verifies internal communications.
- Version represents the software version for the display.
Radio
This diagnostic screen checks the internals of the radio (AM and FM) and the CD player. If NG, replace the audio-navigation unit Audio-Navigation Unit Removal/Installation.
