Part One
Navigation System Diagnostic Mode
Start-up procedure and Diagnostic Menu
There are two ways to enter the diagnostic mode.
Method 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 below.
- Self-Diagnosis Mode (runs the automatic diagnosis of the navigation system)
- Detail Information & Setting (allows you to manually diagnose the navigation system)
Method 2:
Start the vehicle. When the globe screen appears, connect the SCS service connector Component Tests and General Diagnostics to the navigation service connector located behind the navigation unit under the driver's seat. The screen changes to the System Links screen and automatically begins running the self diagnostic. See the System Links section for more information.
NOTE: When finished troubleshooting, make sure to remove the SCS connector.
System Links
1. Enter this screen by connecting the SCS connector or by selecting 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 audio anti-theft code.
NOTE:
- The system cannot complete a full diagnosis unless the engine is running.
- DTC 1501 and/or 2703 can be stored when the ignition switch is at ACCESSORY (I). With the ignition switch is in ACCESSORY (I), the climate control unit is turned off and the navigation unit loses communication and stores DTCs. Therefore, there is a possibility that the system is normal even though DTC 1501 and/or 2703 is stored. Check system links with the engine running, and if it appears normal, the system is OK at this time.
2. Rotate the interface dial to select the icon you want to diagnose. Push in the selector to see the details of that diagnostic function.
3. 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 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 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 as shown.
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 after replacing the navigation unit.
When a navigation unit is powered up for the first time at the factory or after a new replacement unit, or sometimes a remanufactured navigation unit is installed, 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 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 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 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 display unit
- The navigation display unit communicates with the navigation unit over its own GA-Net bus. Information sent by the 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 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, not the main screen
These screens help you troubleshoot the navigation display unit. Select the item you want to troubleshoot, and follow the diagnostic instructions.
- RGB color
- Gray Tone
- White Raster
- Black Raster
- Color Pattern
- Monitor Adjustment
RGB Color
This screen verifies 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, missing color signal. If the picture has lines in it or scrolls horizontally, or vertically, troubleshoot for a possible Composite sync problem.
Gray Tone
This screen helps diagnose problems with contrast. You should be able to see the changes from bar to bar across the scale. If you can't see changes from bar to bar, substitute a known-good navigation unit Service and Repair, and retest.
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
This is for factory use only. To check the color signal, use the RGB Color diagnostic found under the Monitor Check. The chart below shows the colors being used for the various screens.
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.
Unit Check (Quick Check)
NOTE: Some of the tests and screens that are displayed under the Unit Check are different from the other detailed checks.
To start the test, select the item you want to check starts.
- Display
- Radio
- GPS
- ECU Info.
- Rear Camera
- PC Card Info.
- Hard Key
- Yaw Sensor
- DVD
- Aircon
- HFL
- XM
Display
This diagnostic does additional checks on the communication bus between the navigation unit and the display. In addition, this test checks the internal electronic functions.
- When the connection is NG, first check for loose terminals at the navigation unit and the navigation display unit connections. Next check for an open or short in the communication line between the navigation unit and the navigation display unit. If the line has an open or short, replace the affected shielded harness.
- If the ROM or RAM is NG, replace the navigation display unit.
- The version represents the software version in the display.
Radio
If the NG is indicated, check for loose audio unit connectors.
NOTE: If the XM link appears red, but the radio link appears green in the navigation System Links, refer to audio system symptom troubleshooting.
GPS
If GPS indicates NG (Antenna), then check the entire GPS antenna wire from the navigation unit to the GPS antenna. If the wire is crushed or damaged, substitute a known-good GPS antenna Service and Repair. If the diagnostic then reads OK, replace the original GPS antenna Service and Repair. If the diagnostic still reads NG (Antenna), replace the navigation unit Service and Repair. Select information to see the GPS satellite details.
Pressing the Information button displays more GPS signal detail.
ECU Info.
This screen looks for problems in the navigation unit. When you initiate this diagnosis, the navigation unit may freeze or delay up to a minute while the diagnosis runs.
NOTE: Do not try to end this diagnostic by pressing OK or Mem clear before it finishes, otherwise the system may reboot.
- If V-RAM or D-RAM is NG, replace the navigation unit Service and Repair.
- DVD lid displays the state of DVD Lid of navigation unit.
- Program Flash: Displays the version of the navigation software in memory.
- Program on DVD: If displayed, this value represents the version of the navigation software on the navigation DVD.
- DVD version represents the database version on the DVD. You can find this information in either the Setup Screen Version, or in the Diagnostic Screen Version.
- 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 Clear is for factory use and should not be used unless instructed by the factory. Selecting this will clear the customer's settings, personal information, GPS orbital data, and anything else stored in memory.
Selecting this will clear the customer's settings, personal information, GPS orbital data, and anything else stored in memory.
- D-RAM check is for factory use only.
Rear Camera
- If the rearview camera is connected, it will appear as OK.
- When the rearview camera is not connected, or there is a problem in the circuit, it will appear as NG.
PC Card info.
There is no PC Card in the PC card slot, and the screen should display, 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 it the PC Card Information screen appears. The screen displays the Manufacturer, and Product Name as shown in the following screen.
Hard Key
This diagnostic tests the interface dial and the buttons that surround it. For this model, the interface dial and buttons do not use the GA-Net bus for communications.
4. To complete the test, touch each button on the vehicle's control panel, move, rotate, and press in the interface dial to each indicated position. As each function is tested, the corresponding button on the display should highlight. To exit, push in and hold the selector knob.
5. To exit, push in and hold the selector knob.
NOTE: You cannot use the onscreen return button to exit this function.
