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System Diagnostic ModeStart-up procedure and Diagnosis Menu
There are two ways to enter the diagnostic mode:
1. Connect the SCS service connector to the navigation service connector located in the trunk. Turn the ignition switch to the ON (II) position. The display will go directly to the diagnostic menu screen.
NOTE: When finished troubleshooting, make sure to remove the SCS service connector.
2. Turn the ignition switch ON (II). Use the navigation display hard buttons, press and hold the 3 buttons (Menu, Map/Guide, and Cancel), and keep them pressed for about 5 seconds. The display screen will go directly to the "Select Diagnosis Items".
NOTE: This only allows access to the diagnostic screens. All other navigation functions are disabled.
3. After the display changes to the Select Diagnosis Items menu, select the item you want to check and the diagnostic will start. To return to the previous screen, select "RETURN".
- Navi System (Link)
- Monitor Check
- Unit Check
- Car Status
- F-CAN
- 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 diagnostic begins, you will hear a "bong" sound. The system is in a "Detecting" mode, and is waiting for all items in white to be tested. This includes the voice control (TALK/BACK) buttons, and microphone. Press the 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 BACK button. The "Cancel" indicator should turn green.
- If all of the communication lines connecting the system components, and the TALK/BACK switch 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 will show "NG" in red. Use the troubleshooting index, and other diagnostic screens to help locate the problem.
- The indication on the screen may not change until you cycle the ignition switch. After repairing the affected cable or system, repeat this diagnostic. NOTE: Green boxes and green "OK" indicate that the communications lines (cables) are intact. This diagnostic 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 diagnostic may be necessary to fully test each component.
NOTE: The mic level indicator must reach the 6th bar or greater to pass the test.
Factory diagnostic screen "In Line Diag"
When a navigation unit is powered up for the first time at the factory, the "factory diagnosis" screen (In Line Diag) shows up. Normally the factory performs the steps necessary to verify proper operation and terminate the "factory diagnostic". Until the proper confirmation sequence is performed, the screen will show up every time the vehicle is started.
Follow the steps below to prevent the screen from showing up in the future:
- Hold down the buttons (Menu + Map/Guide + Cancel) for about 5 seconds (the "Select Diagnosis Items" screen will appear)
- Hold down the Map/Guide button for 5-10 seconds (A screen with a "Complete" button, will appear)
- Touch "Complete", and then the "Return" button (the system may re-boot)
- Restart the vehicle, and confirm normal operation by completing the "TQI of the navigation system" Service Bulletin.
Monitor Check
Overview of display unit
- The display unit 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 display unit includes commands to control the LCD back light.
- The navigation unit also sends navigation and video information to the screen using the Red, Green, Blue, and Composite Video signals.
- 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 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 be shown without distortion. The combination of all three should produce a central white section. If any of the colors are missing, the picture has lines in it or scrolls horizontally, or vertically, troubleshoot for a Composite sync and the 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.
White Raster
The entire display must be white.
Black Raster
The entire display must be black.
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.
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
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 an almost infinite number of touch locations. However, to be compatible with earlier systems, the software only senses the locations shown on the diagram screen below. Every possible touch button position is shown on this diagram screen. Touching one of these should cause its color to reverse, and sound a "beep". If the touch locations are off slightly (by less than one touch location), use the "Touch Panel Calibration" diagnostic 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 display unit.
Touch Panel Calibration
Touch the "+" item on the screen. If the screen responds at some other location when touched, adjust the responding point to the touched point using the joy stick.
Unit Check
To start the test, select the item you want to check.
Display
This diagnostic performs additional checks on the communication bus between the control unit and the 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 display unit connections. Next, check for an open or short in the communication line between the navigation unit and the display unit. 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 display unit.
- The version represents the software version in the display.
Radio
This diagnostic checks the audio connections. If not OK, do the troubleshooting for the audio system.
Navi ECU
This screen looks for problems with the navigation unit. When you initiate this diagnostic, the navigation unit may delay up to a minute while the diagnosis runs.
NOTE: This diagnostic cannot be canceled when running.
- If "V-RAM" or "D-RAM" is NG, then replace the navigation unit.
- If "GPS" indicates "NG (ANT)", then 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 diagnostic reads OK, then order a new GPS antenna. If the diagnostic 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 set up 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.
- The Mem Clr is for factory use and should not be used unless instructed by the factory.
Selecting this will erase the client's settings, personal information, and anything else stored in memory.
PC Card info.
There is no PC Card in the PC slot, and the screen should say, "PC Card is not inserted."
NOTE: 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 diagnostic tests the joystick, and the buttons that surround it. For this model, the joystick and buttons use the GA-Net bus for communication to the navigation unit.
To complete the test, touch each button, and move the joystick to each indicated position. As you test each function, the corresponding button on the display should highlight. To exit, push in and hold the joystick.
