Operation CHARM: Car repair manuals for everyone.

Part 1 of 2

System Diagnostic Mode

Start-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 menu.






3. After the display changes to the Diagnostic 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 (System link)
- GPS Information
- Yaw Rate
- Tire Calibrate
- Functional Setup
- Version

Factory diagnostic screen "In Line Diag"

NOTE: If the vehicle left the factory in the factory diagnosis mode, you will see this screen every time you turn on the ignition.

When a navigation control 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.

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 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 switch (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 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 find the problem. The rearview camera feature is optional. If the camera is not installed, the "rear camera" icon is yellow/orange. When the camera is installed the icon is green. If the icon is not green with the rearview camera installed, check for opens or shorts in the rearview camera cable.

- 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.
- If the XM link is red or flashing red, go to audio system symptom troubleshooting, Symptom Troubleshooting Index or see XM (HIP) diagnostic screen.






Monitor Check

Overview of navigation display

- The illumination input from the gauge brightness control provides back lighting for the buttons surrounding the screen and the illumination ON and OFF signal for the display backlighting.
- The illumination cancel signal is provided by the gauge via B-CAN to the HVAC unit, then to the navigation unit via the U-ART bus.
- 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
- Gray Tone
- White Raster
- Black Raster
- Color Pattern
- Monitor Adjustment
- Touch Panel Check
- Touch Panel Calibration






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 be shown without distortion. The combination of all three should produce a central white section. If any of the colors are missing, troubleshoot the color signal. If the picture has lines in it, or scrolls horizontally or vertically, troubleshoot for a Composite sync 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" 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. The factory default is 0,0.






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 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 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 sound 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 will 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 diagnostic allows alignment of these artificially created "zones" with the location of the button 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 diagnostic.






Unit Check

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

- Display
- Radio
- Navi ECU
- PC Card Info
- Hard Key






Display

This 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, the navigation display, the audio unit, and the CD changer connections. Next check for an open or short in the communication line between the navigation unit, the navigation display, the audio unit, and the CD changer. 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.
- Six CD connection checks the status of the connection between the CD 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, "Close".






Radio

If the NG is indicated, check for loose audio unit connectors.






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 diagnostic runs.
- 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 Setup 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 popup 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 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 diagnostic 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, or press and hold the joystick to exit.