Navigation System Diagnostic Mode
Start-up procedure and Diagnosis Menu
  1. Turn the ignition switch to the ON (II) position.
    Press and hold Menu, Map/Guide, and Cancel buttons. Keep them pressed for approximately 5 seconds. The display screen then goes directly to the Diagnostic Menu.
  1. 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, a ‘‘bong‘‘ sound is heard. 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 the microphone. Press the TALK button on the steering wheel, and in a normal voice, say ‘‘testing‘‘. The Talk indicator on the screen should become green, and the voice level indicator should move to at least the 6th bar to pass. Next, press the BACK button. This should cause the ‘‘Cancel‘‘ indicator to go 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 will become green.
  • If there is a problem with the system, the faulty system component item will change to red, and the screen will show ‘‘NG'' in red. Use the troubleshooting index, and other diagnostic screens to help locate the problem.
  • The indicator on the screen may not change until the ignition switch is cycled. 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.
  • 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 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 navigation display is protected by the security system 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 troubleshooting of 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
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 for 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
This diagnostic screen checks for pixels that may be ‘‘dead'' (off). The entire display must be shown in white.
Black Raster
This diagnostic screen checks for pixels that may be ‘‘stuck'' (on). The entire display must be shown in 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 the navigation display to be centered. 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.
Unit Check
Select the item you want to check, and the test starts.
  • Display
  • Radio
  • Navi ECU
  • Hard Key
  • TMC Status
Display
This performs additional checks on the communication bus between the control unit and the display. In addition, the internal electronics functionality are confirmed.
  • When the connection is NG, first check for loose terminals at the navigation unit, navigation display, audio unit connections. Next check for an open or short in the communication line between the navigation unit, navigation display, audio unit. If the line is found 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.
Radio
If the NG is indicated, check for loose audio unit connectors.
Navi ECU
This screen looks for problem with the navigation unit. When this diagnostic is initiated, there is a delay of up to a minute while it 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. This information can also be found in Setup by selecting System Information.
  • ‘‘Serial No.'' should be the same as the serial number found on the underside of the navigation unit.
  • 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, and settings. If selected, a popup box is displayed asking if you want to clear the memory. If so, select ‘‘Yes''.
Hard Key
This diagnostic screen checks the status of each of the hard buttons surrounding the navigation display. When each hard button is pressed, the corresponding item on the screen should flash ‘‘blue''. Press and hold the joystick to exit.
TMC Status
This screen displays a state about the TMC reception.
  • Frequency: Frequency receiving in this time.
  • Field Strength: Display reception sensitivity with 0−15.
    0−5: Cannot receive
    6: Instability
    7−8: Can receive it somehow
    9−15: Can receive it clear
  • Error Rate Correction: RDS block error.
  • Uncorrected Block/min: The number of block errors per one minute.
  • Message Counter: The number of messages which I received.
  • Provider Count: The number of providers which I can receive.
  • Box Error Status: An error of a TMC tuner.
Car Status
This screen is used 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 ECM connector A (Pin 13 of 17-Pin C-connector)
    a) OFF (0) when vehicle is not moving
    b) ON (1) when vehicle is moving
The VSP comes from the ECM 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 taillight relay (Pin 7 of 12-Pin 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 optional rear view camera. This signal is needed because the Speed Pulse does not provide any directional information to the system.
  • ILL CANCEL
    a) OFF (0) when the gauge assembly brightness control is less than 90 % brightness
    b) ON (1) when the gauge assembly brightness knob is more than 90 % brightness.
The illumination cancel signal comes from the A/C ECU.
The A/C ECU gets the signal off of B-CAN from the gauge assembly and sends it to the Navi ECU using the communication between A/C and Navi (Pins 4, 14, and 15 in the 20-Pin A navigation control unit connector.
  • ILL-Illumination Indication (Pin 5 of navigation unit 20-Pin 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 has a microswitch to detect this. If open is indicated when the door is closed, replace the navigation unit.
GPS Information
This screen shows the current status of GPS reception. The circular diagram shows the current location of the GPS satellites (yellow balls) 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. Naturally, nearby obstructions, like tall buildings will block satellites in that direction. That is why it is necessary to be in an open area to effectively troubleshoot GPS reception issues. 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 or side 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 3 or more icons. If not, troubleshoot for ‘‘GPS icon is white''.
  • The ‘‘Current Position'' shows latitude, longitude, and elevation (in feets). 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 function ‘‘Adjust Time Zone/Clock''.
NOTE:
Push and hold the ‘‘Map'' button, and the ‘‘dots'' on the diagram are replaced with the ‘‘PRN''# (satellite numbers). There numbers correspond to the numbers in the ‘‘PRN'' column on the ‘‘GPS details'' screen.
GPS Detail
By pressing and holding the MENU button for 10 seconds, a GPS Detail screen is displayed. 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 ‘‘PRN''# on the circular GPS diagram (see prior screen).
NOTE: The data shown in the GPS Detail screen is an example only.
Column
Description
Problem indication
3D
Active satellites (Yellow Dot)
PRN
The satellite ID number
ST
The status: 0 = cannot view or searching, 2 = acquiring
AZI
Azimuth, the angle (0−360) clockwise from north
EL
Elevation from the horizon (90 deg is overhead)
C/N
N/A
Healthy signal is 49−52, no signal: 27−33
ACC
N/A

Yaw Rate
This diagnostic checks the yaw rate sensor in the control 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 HIGHER than the ‘‘Offset'' voltage indicates that the vehicle is turning to the right.
    A ‘‘sensor'' output voltage LOWER 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 control 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
Abnormal
Offset
2.526 V
Offset
2.526 V
Sensor
2.516−2.536 V
Sensor
2.623 V


Example: Vehicle turning

Normal
Abnormal
Offset
2.526 V
Offset
2.526 V
Sensor
2.678 V (right turn)
2.478 V (left turn)
Sensor
2.623 V (no change on turns)

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 adjust the yaw rate sensor without instructions from the factory. See next paragraph for tuning.
Yaw Rate Tuning
This diagnostic allows you to graphically display problems with the yaw rate sensor.
  • The ‘‘ANG-Disp'' value accumulates any differences between the ‘‘offset'', and ‘‘sensor'' voltages (see Yaw Rate diagnostic). When the sensor is healthy, the random changes in these two voltages generally cancels out, so the value is 0. However if one voltage is consistently higher than the other, then the ‘‘ANG-Disp'' value accumulates the constant change.
  • The ‘‘Reset'' button temporarily clears the angular accumulation (ANG-Disp), and clears the diplay dots.
  • Do not touch the ‘‘CCW'' or ‘‘CW'', or ‘‘Set'' buttons. These are used for factory setup only.
For serious problems with the sensor, the stationary test usually confirms whether the sensor is defective. For yaw rate issues related to driving, perform the road test described.
  1. Stationary test: If the ‘‘VP'' icon spins in place and the ‘‘ANG-Disp'' value slowly increases or decreases in value, the yaw rate sensor is defective. Replace the Navigation control unit.
  1. Road test: Drive the vehicle on a very straight road. Enter the diagnostic mode, select ‘‘Yaw rate'', and touch the ‘‘Tuning'' button. While driving down a straight road, the white ‘‘dots'' should trace a straight line across the screen. However, if you are driving on a straight road, and you notice the dots constantly dropping down or heading up as you drive, the navigation control unit's yaw sensor is defective. You can touch ‘‘Reset'' to clear ‘‘ANG-Disp'', and dotted line.
  1. If either test fails, please enter ‘‘Yaw rate sensor defective'' for the problem description, on the ‘‘Navigation core return form''.
Tire Calibration
As the vehicle moves, the navigation system receives speed pulses from the ECM. These pulses are converted using a conversion factor to a mph speed that moves the vehicle position (VP) on the map. The navigation system has an internal tuning function that generates and refines this factor based on actual driving. The ‘‘Level'' indicates the status of the tuning. At navigation initialization, it begins at 0, and increases to 10 as the navigation system is used.
  • The ‘‘Auto Tuning'' is factory set to ‘‘ON'', and should remain on.
  • The ‘‘Study'' indicates the tuning status. If it is less than 10, the unit is still calibrating.
  • The ‘‘Tire-Cal. Tuning'' and ‘‘Set'' should not be used. It is for factory use only.
Functional Setup
Select the item you want to check.
  • GPS Send Time
  • Mic Level
  • Solar Angle
GPS Send Time
This screen is for factory use only. It allows adjustment of the GPS time. This display updates in real time.
  • ‘‘GPS Time'' is the time as received from the GPS satellites. It is in Greenwich Mean Time (GMT).
  • Date, Hour, Minute, and ‘‘Set'' should not be used.
Mic Level
This diagnostic screen allows you to independently test the microphone and the TALK and BACK buttons. They are used to activate the voice control system. The microphone is located near the map light in the ceiling. It is directional, and works best if the voice is coming from the drivers seat.
  • Press the TALK button on the steering wheel, and in a normal voice say ‘‘testing''. The TALK indicator on the screen should momentarily become green, and the text ‘‘Now Recording...'' should appear in yellow. If the Mic Level indicator on the screen does not briefly become green, then check the wiring from the TALK button to the navigation unit. If there is no ‘‘Mic Level'' movement when you speak, then you should check the wire running from the microphone to the control unit.
  • Press the BACK button on the steering wheel. This should cause the Cancel indicator on the screen to momentarily become green. If it does not briefly change to green, then check the wiring from the steering wheel BACK button to the navigation unit.
NOTE:
If the radio is off, and there is movement in the indicator-even without speaking, then ensure that the vents are not blowing on the microphone.
This should resolve voice control complaints such as:
  • Sometimes the system does not understand my commands.
  • I have to shout at the navi for a command to be recognized.
  • The system just says ‘‘pardon''.
Solar angle
This screen is used to graphically display the sun's position as determined by GPS.
This screen is for factory use only, and allows simulation of this feature for development purposes.
  • The ‘‘manual tuning'' button should always be ‘‘OFF''.
  • The ‘‘Angle'' is the angle that the sun (shown with red ‘‘dot'') is above the horizon.
  • The ‘‘vehicle'' value represents the angle, clockwise from North, to the direction that the vehicle position (VP) icon is pointing (always points straight up).
  • The ‘‘direction'' value is the angle, measured clockwise from the VP (straight up) to the suns position.
  • The reliability ranges from 1 to 3, and represents the accuracy of the Vehicle Position relative to the sun.
Version
This screen displays the current version of the program, and allows the loading of a new version of the program either from a CD/DVD.
The Program Flash version should always be greater than or equal to the Program Disc version. IPL, APL, DBOOT, and system uCom are for factory use only.
The Model code is SGMA, and is for factory use only. This code is stored on a chip in the navigation unit. Therefore, every model has a unique part number for the navigation unit.
NOTE: If any model number other than SGMA is displayed, replace the navigation unit with the correct part. The model code tells the navigation unit what software to load off the DVD.
Do not use Download, unless instructed to do so by the factory.
Error Message Table
Screen Error Message
Solution
Navigation system is unable to acquire a proper GPS signal.
Make sure there is nothing on the dashboard blocking the GPS antenna. If not, move the vehicle to an open space away from tall buildings, trees, etc. After-market devices can affect the GPS reception.
Navigation unit door is open or No DVD disc installed. Please check system.
Make sure the correct turquoise (blue/black)-labeled navigation DVD is installed with the label side up and the navigation unit door is fully snapped closed.
DVD reading error (incorrect DVD disc) please consult your dealer.
Verify correct color (turquoise) DVD installed.
Display temp is too high. System will shut down until display cools down.
This message will appear briefly when the display temperature is too high, and the display will turn off until the temperature cools down. The system will turn back on when the display cools down.
Outside temperature is low, system will take a while to start up.
The temperature is below −30 °C and the navigation ECU has difficulties reading the DVD. The system will start up when the temperature warms up.
DVD disc reading error (unformatted), please consult your dealer.
Check the DVD source for deep scratches or other damage. Make sure you are using an official Honda navigation DVD (white in color). The system cannot read other mapping databases or video DVDs. If the problem persists, see your dealer.
Route has not been completed. Please try again from a different location.
Routing to or from a place (new area) that is not in the database. Try planning a different route to or from a different location.
No alternate route found. Original route will be guided.
No alternate route method was found. The original route will be used.
This destination cannot be found in database.
The destination was not found in the database. Try another destination nearby, or select the destination with the joystick.
Please operate climate control after starting engine.
The engine needs to be running to operate the climate control system.