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System Diagnostic ModeStart-up procedure and Diagnostic Menu
1. Turn the ignition switch to the to ON (II) position.
a. If the battery has not been disconnected, then press and hold the Menu, Map/Guide, and Cancel buttons. Keep them pressed for about 5 seconds. The display screen then goes directly to the Diagnostic Menu.
b. If the battery was disconnected and reconnected prior to this test and you do not have the anti-theft security code or the Acquiring GPS Reception screen is displayed, hold down the Menu and Zoom Out button. You will see the Navi System Link screen. Push the joystick to go directly to the Diagnostic Menu.
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 will start. 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 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 (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 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 be shown 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 unit.
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 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 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 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 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 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 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 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.
- 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 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 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), 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 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 Clr 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 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.
Car Status
Use this screen to confirm that navigation unit is properly receiving input signals. Signals equal to (0) are OFF, and signals equal to (1) are ON. If the value on the display does not match the actual vehicle status, then check the wire carrying the signal.
- VSP-Vehicle Speed Pulse from PCM (Pin 6 of navigation unit C-connector)
a. OFF (0) when vehicle is not moving
b. ON (1) when vehicle is moving
The VSP comes from the PCM as a dedicated signal. Internally, the navigation unit compares the actual VP on the map against street data to adjust the pulse to speed scaling factor. As this scaling factor becomes more accurate, the Level gradually increases from 0 to 10.
- BACK-Reverse indication from multiplex integrated control unit
(Pin 5 of navigation unit C-connector)
a. OFF (0) when shift lever is in any position other than reverse
b. ON (1) when shift lever is in reverse
The Back signal is used by the navigation unit to allow the map screen to show the VP moving backwards when in reverse and to trigger the back-up camera. This signal is needed because the Speed Pulse does not provide any directional information to the system.
- ILL-Illumination Indication
(Pin 5 of navigation unit A-connector)
a. OFF (0) when parking lights, or headlights are off
b. ON (1) when parking lights, or headlights are on
This signal is used by the navigation unit to determine whether to put the navigation screen into the Day or Night brightness mode. (Setup screen 1)
- DVD Lid-senses if DVD door is open
a. (Close) when door is closed
b. (Open) when door is open
The navigation unit uses a microswitch to detect this. If open is indicated when the door is closed, replace the navigation unit.
- ILL CANCEL
a. OFF (0) when dash brightness is not set to maximum brightness
b. ON (1) when headlights are on, but dash brightness is set to max brightness
This item detects whether the illumination cancel function is in use. The illumination cancel function is activated by rotating the dash brightness knob fully clockwise (full bright) when the headlights OFF (day mode) and ON (night mode). The signal is passed from the gauge control module by B-CAN to the climate control ECU. From there the signal travels to the navigation unit on the climate UART bus.
GPS Information
This screen shows the current status of GPS reception. The circular diagram shows the current location of the GPS satellites (yellow numbers) as they would appear in the sky. The outer circle represents the horizon (0 degrees elevation). The middle and inner circles represents 30 and 60 degrees respectively. The very center of the diagram (90 degrees elevation) is directly overhead. Nearby obstructions, like tall buildings, will block satellites in that direction. That is why it is necessary to troubleshoot GPS reception issues in an open area. The satellites shown on the diagram correspond to the PRN number in the GPS Details screen. There are always 24 active GPS satellites in orbit. Because satellites fail, and have to be removed from service, spares are always parked in orbit, ready to be activated. This is why the PRN (satellite ID number) can be greater than 24.
NOTE:
- To use this screen for troubleshooting, the vehicle should be outside, away from buildings, tall trees, and high-tension wires for at least 10 minutes with the engine running.
- Metallic window tinting on the front window or after-market electronic accessories mounted near the navigation unit, GPS antenna, or navigation display can interfere with GPS acquisition.
- The Number of Satellites box shows the number of acquired satellites (maximum of 12). It should contain 4 or more icons. If not, troubleshoot for GPS icon is white, or not shown.
- The Current Position shows latitude, longitude, and elevation (in meters). If there are less than 4 satellites, the elevation can be grossly inaccurate.
- The Date/Time field shows the current date, and also a time that includes daylight savings and other offsets entered by the customer in Setup screen 2 Adjust Time Zone/Clock.
GPS Detail
By pressing and holding the MENU button for 10 seconds, a GPS Detail screen appears. This screen displays real time incoming satellite positional data. Most of the information shown on this screen is for factory use, however some of the data can indicate partial GPS signal interference.
- The box TS/AS and HDop/VDop is for factory use.
- The Speed and Direction information is updated in real time when driving, and can be used to detect intermittent speed sensor problems.
- The Date/Time Information is the same as in Setup screen 2 Adjust Time Zone/Clock.
- If the 3D icon is shown above the yellow dots, this implies that at least 4 satellites are available for map positioning, and the GPS indicator on the map screen will be green. See the Global Positioning System detailed explanation in the System Description.
- If the row of data in the table below begins with a yellow dot, the AZI and EL fields can be used to locate each satellite on the circular GPS diagram (see prior screen).
NOTE: The data shown in the GPS Detail screen is an example only.
Yaw Rate
This diagnosis checks the yaw rate sensor in the navigation unit. This device detects when the vehicle turns, and repositions the vehicle position icon on the map screen. For more detailed information, see the yaw rate sensor theory of operation under System Description.
- Sensor indicates the voltage output from the yaw rate sensor. It should indicate about 2.500 V when stopped.
- Offset is the reference voltage or standard within the yaw rate sensor. It also should indicate about 2.500 V when stopped.
- A sensor output voltage LOWER than the Offset voltage indicates that the vehicle is turning to the right.
A sensor output voltage HIGHER than the Offset voltage indicates that the vehicle is turning to the left.
- The yaw rate offset and sensor should both indicate about 2.500 V when stopped. If either reads zero or 5.000 V, replace the navigation unit.
- The yaw rate offset and sensor should be within +/- 0.01 V of each other when stopped. The sensor value should change relative to the offset as the car is turned while driving. If not, replace the navigation unit.
Example: Vehicle stopped
Normal
Offset 2.526 V
Sensor 2.516-2.536 V
Abnormal
Offset 2.526 V
Sensor 2.623 V
Example: Vehicle turning
Normal
Offset 2.526 V
Sensor 2.678 V (left turn) 2.478 V (right turn)
Abnormal
Offset 2.526 V
Sensor 2.623 V (no change on turns)
- Auto tuning should always be on. If it is off, turn it on.
- Sensitivity study represents the status of the internal tuning function. At initialization, this value starts at 6 and increases to # 10 as the internal correction values become more accurate.
- The settings CCW Cal Factor, CW Cal Factor, and Set are for factory use only. THIS SHOULD NEVER BE USED.
NOTE: Do not try to tune the yaw rate sensor without instructions from American Honda.
