Part One

Navigation System Diagnostic Mode

Start-up procedure and Diagnostic Menu

1. Turn the ignition switch to ON (II).









NOTE: This only allows access to the diagnostic screens. All other Navigation functions are disabled.





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

- Navi System (Link)
- Monitor Check
- Unit Check
- Car Status
- GPS Information
- Yaw Rate
- Tire Calibrate
- Functional Setup
- Version

Navi System Link

- This diagnostic tests the cables connecting the navigation components. Ensure that the ignition switch is in the ON (II) position. When the diagnosis begins, you hear a long sound. The system is in a Detecting mode, and is waiting for all items in white to be tested. This includes the voice control switch (navigation TALK/BACK buttons), and microphone.
Press the navigation TALK button on the steering wheel, and in a normal voice, say "testing". The Talk indicator on the screen should turn green, and the voice level indicator should move to at least the 6th bar to pass. Next, press the navigation BACK button. The Cancel indicator should turn green.
- If all of the communication lines connecting the system components, and the navigation TALK/BACK buttons/microphone check out OK (all block diagram items green), then the OK indicator turns green.
- If there is a problem with the system, the faulty system component item turns red, and the screen shows NG in red. Use the troubleshooting index, and other diagnostic screens to help locate the problem.
- The indication on the screen will not change until you cycle the ignition switch. After repairing the affected cable or system, repeat this diagnosis.
NOTE: Green boxes and green OK indicate that the communications lines (cables) are intact. This diagnosis does not necessarily imply that the individual components are functioning properly. For instance, the GPS antenna wire may be crushed, but still show as green. A road test, or other diagnosis may be necessary to find the problem.
- Select Return to return to the Diagnostic Menu or the Exit Diag button to exit.

NOTE: The Mic Level indicator must reach the 6th bar or greater to pass the test.






Monitor Check

Overview of the navigation display

- The navigation display communicates with the navigation unit over its own GA-Net bus. Information is sent to the navigation unit whenever the user activates the touch screen, or buttons. Information sent by the navigation unit to the navigation display includes commands to control the LCD back light.
- The security system protects the navigation display 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. Select the item you want to troubleshoot, and follow the diagnostic instructions.





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 the colors are missing, troubleshoot for a Composite sync and color signal problem.





Gray Tone

This screen looks for problems with contrast. You should be able to see the changes from bar to bar across the scale. It is normal for the 2 bars on either side to appear the same. If you can't see the shade changes from bar to bar, replace the navigation display.





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.





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.





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 test.





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 will reset the display position to factory specifications.





Touch Panel Check

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 capability of an almost infinite number of touch locations. However, to be compatible with earlier systems, the software only senses the locations shown on the diagnostic screen below. Every possible touch button position is shown on this diagnostic screen.

Touching one of these areas should cause its color to reverse, and you should hear a beep . If the touch locations are off slightly (by less than one touch location), use the Touch Panel Calibration diagnosis to re-align the touch zones with the screen image. If any areas of the screen either don't respond, or respond at some other location when touched, then replace the navigation display.

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 instead of fixed infrared beams. This means that every location of the entire surface of the display is touch sensitive.

For the display to be compatible with earlier navi systems, the system software creates touch zones emulating the touch switches created by the intersections of 20 vertical and 10 horizontal infrared beams. This diagnosis allows alignment of these artificially created zones with the location of the button's images on the screen.

Normally this should never need adjustment, and it 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 four test areas consisting of a + button and an adjacent box with a black border. Touch the four + buttons to verify alignment. If, when you touch a + button, the adjacent box becomes yellow, then do the following. Continue to hold the + button, and simultaneously move the joystick to shift the screen slightly from side to side, or up and down. The adjustment is complete when you can touch all four + boxes and none of the adjacent boxes becomes yellow.
- To store any changes you make, push in the joystick.
- To reset the touch zones to the factory default, touch the Map/Guide button.
- Press Return to exit the diagnosis.





Unit Check

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





Display

This diagnosis does additional checks on the communication bus between the navigation unit and the navigation display. In addition, the internal electronics and touch screen functionality are confirmed.

- When the connection is NG, first check for loose terminals at the navigation unit and the navigation display connections. Next check for an open or short in the communication line between the navigation unit and the navigation display. If you find the line to have an open or short, replace the affected shielded harness.
- If the ROM or RAM is NG, replace the navigation display.
- The version represents the software version in the display.
- 6 CD connection checks the status of the connection between the audio disc changer and the audio unit. An NG represents an open in that circuit.
- Display Lid indicates if the front display panel is Open or Closed. This should always say Closed.





Radio

If the NG is indicated, check for loose audio unit connectors and recheck. If NG is still indicated, do the troubleshooting for the audio system.





Navi ECU

This screen looks for problems with the navigation unit. When you initiate this diagnosis, the navigation unit may freeze or delay up to a minute while the diagnosis runs.

- If V-RAM or D-RAM is NG, then replace the navigation unit.
- If GPS indicates NG (ANT), check the entire GPS antenna wire from the navigation unit to the antenna. If the wire is crushed or damaged, try a known-good antenna. If this diagnosis reads OK, then replace the GPS antenna. If the diagnosis still reads NG (ANT), then replace the navigation unit.
- DVD ROM represents the database version on the DVD. You can also find this information in Setup Screen 4 by selecting System Information.
- Serial No. should be the same as the serial number found on the underside of the navigation unit. You need this number to obtain the security code from the Interactive Network (iN) system.
- Mem Clear is for factory use, and should never be used unless instructed by the factory. Accidental selection will erase the customer's personal data, PINS, and settings. If selected, a pop-up box appears asking if you want to clear the memory. If so, select Yes.





PC Card info

There is no PC card in the PC card slot, and the screen should say, PC card is not inserted. Do not insert any card or object into the slot.





If the factory provides a PC card and instructs you to insert a card, then the screen displays the Manufacturer, and Product Name as shown in the following screen.





Hard Key

This diagnosis checks the status of each of the hard buttons surrounding the navigation display. When you press each hard button, the corresponding item on the screen should flash blue. Touch the return key to exit.