Part 1
Navigation System Diagnostic Mode
Start-up procedure and Diagnostic Menu
There are two ways to enter the diagnostic mode:
Mode 1:
Start the vehicle When the globe screen appears, connect the SCS service connector. Navigation System Forced Starting of Display (With Navigation) to the navigation service connector located behind the navigation unit in the trunk. 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 service connector.
USA models
Canada models
Mode 2:
Start the vehicle, and at the disclaimer screen use the navigation display hard buttons as described below:
Press and hold the MAP/GUIDE, MENU, and CANCEL, buttons 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)
System Links
1. Enter this screen by connecting the SCS service connector or 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.
NOTE:
- The system cannot complete a full diagnosis unless the engine is running.
- DTC 2703 can be stored when the ignition switch is at ACCESSORY (I). With the ignition switch 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 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.
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 are shown in the block diagram.
- The results from the various components shown in the block diagram.
- The microphone is tested by listening to the bong sound produced by the 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 below.
NOTE: By selecting the HELP icon, you can see a description for each color.
USA models
Canada models
Icon Color Information
*1: USA models
*2: Canada models
*3: DTC 2703 can be stored when the ignition switch is in 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. It is possible that the system is normal with DTC 2703 stored. Check the system links with the engine running, and if it shows normal, the system is OK at this time.
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 navigation unit.
When a navigation unit is powered up for the first time at the factory or after replacement with a new or remanufactured 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 below to prevent the screen from showing up in the future:
- Press and hold the MENU, MAP/GUIDE, and CANCEL buttons for about 3 seconds. The Select Diagnosis items screen appears.
- Press and hold the MAP/GUIDE button for about 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 item Detail Information & Setting menu, the main diagnosis menu appears.
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 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.
These screens allow you to troubleshoot the navigation display unit. Select the item you want to troubleshoot, and follow the diagnostic instructions.
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, troubleshoot for the color signal. Symptom Troubleshooting If the picture has lines in it or scrolls horizontally, or vertically, troubleshoot for a Composite sync 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 navigation display unit.
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.
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 navigation display unit.
Monitor Adjustment
This allows you to center the navigation display. Use the interface dial 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.
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
- Aircon
- HFL
- XM (Canada models)
Display
This diagnosis does additional checks on the communication bus between the navigation unit and the navigation display unit. This test also 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 ECU Bus 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
This test checks the connection between the audio unit and the navigation unit. If 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 link, refer to audio system symptom troubleshooting.
GPS
If GPS indicates NG (ANT), then check the entire GPS antenna wire from the navigation unit to the GPS antenna only. If the wire is crushed or damaged, try a known-good GPS antenna. If the diagnosis then reads OK, replace the original GPS antenna. If the diagnosis still reads NG (ANT), replace the navigation unit.
Select information to see the GPS satellite details.
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 diagnosis 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 navigation 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 client's settings, personal information, GPS orbital data, and anything else stored in memory.
Rear Camera
- This test checks whether rearview camera is connected to the navigation display unit.
- When connection is shown NG, check the rearview camera signal line.
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 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.
To complete the test, touch each button on the vehicle's audio-navigation switch panel, and move 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.
NOTE: You cannot use the onscreen return button to exit this function
Yaw Sensor
This screen gives a quick test of the yaw sensor functionality based on the two voltages Sensor and Offset. For more information see the Yaw Rate diagnosis.
DVD
This diagnostic tests the navigation DVD reader.
Aircon
This diagnosis tests the climate bus connection (AC-SI and AC-SO) between the navigation unit and climate control unit. This test does not check the system components, only the connections. Make sure the engine is running for this test.
NOTE: If this test is run with the ignition switch is in ACCESSORY (I), the result will be NG.
HFL
This checks the 4 wire communication bus between the HandsFreeLink control unit and the navigation unit. This test does not check the system components, only the connections.
XM (Canada models)
- This checks the GA-NET Bus line to the XM receiver.
- When connection is shown with NG, check the connection between the XM receiver and the audio unit.
