Navigation System Diagnosis Mode

Start-up procedure and Diagnosis Menu There are two ways to enter the diagnostic mode:

1. Connect the SCS 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 shown.
   NOTE: When finished troubleshooting, make sure to remove the SCS connector.

1. Turn the ignition switch ON (II). Use the navigation display hard buttons as described:
   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 shown.
   NOTE: This only allows access to the diagnostic screens. All other navigation functions are disabled.

1. After the display changes to the Select Diagnosis 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
   - 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 diagnostic 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 (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 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 switch 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 indication 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 fully test each component.

NOTE: The mic level indicator must reach the 6th bar or greater to pass the test.

Factory diagnostic screen ‘‘In Line Diag'' 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 ‘‘PDI of the navigation system'' Service Bulletin.

Monitor Check Overview of display unit

- The display unit 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 display unit includes commands to control the LCD back light.
- The navigation unit also sends navigation and rear camera video information to the screen using the Red, Green, Blue, and Composite Video signals.
- The display unit 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 display unit. Select the item you want to troubleshoot, and follow the diagnostic instructions.

RGB Color This screen verifies that the display unit 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 The entire display must be shown in white. |

Black Raster 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 Color'' diagnostic found under the Monitor Check. |

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. |

Touch Panel The panel touch sensing system consists of a touch sensitive resistive membrane covering the display. Contrarily 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 diagram screen below. Every possible touch button position is shown on this diagram screen. Touching one of these 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'' diagnostic 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, the replace the display unit. |

Touch Panel Calibration Touch the ‘‘+'' item on the screen. If the screen respond at some other location when touched, adjust responded point to touched point using the joy stick. |

Unit Check Select the item you want to check and the diagnostic starts. |

Display This diagnostic 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 display unit connections. Next check for an open or short in the communication line between the navigation unit and the display 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 display unit.
- The version represents the software version in the display.
  NOTE: When selecting this diagnostic from ‘‘Unit Check,'' quickly remove your fingers from the touch-screen to avoid a false detection of the infrared sensors.

Radio This diagnostic checks the audio connections. If not OK, do the troubleshooting for audio system. |

Navi ECU This screen looks for problems the navigation unit. When this diagnostic is initiated, there is a delay of up to a minute while it runs. NOTE: This diagnostic cannot be canceled when running.

- 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 Screen 4 by selecting System Information.
- ‘‘Serial No.'' should be the same as the serial number found on the underside of the navigation unit. This number is needed to obtain the security code from the Interactive Network (IN) system.
- The Mem Clr is for factory use and should not be used unless instructed by the factory.
  Selecting this will erase the customer's settings, personal information, and anything else stored in memory.

Hard Key This diagnostic tests the joystick, and the buttons that surround it. For this model, the joystick and buttons utilize the GA-Net bus for communication to the navigation control unit. To complete the test, touch each button, and move the joystick to each indicated position. As each function is tested, the corresponding button on the display should highlight. To exit, push in and hold the joystick. |

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 PCM (Pin 6 of 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 (see the Tire Calibrate diagnostic screen).

- BACK-Reverse indication from taillight relay (Pin 5 of 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 activate the rearview camera. This signal is needed because the Speed Pulse has no direction indication.
This signal is obtained off of the F-CAN bus. For problems, perform F-CAN troubleshooting. Diagnostic trouble codes (DTCs) for the F-CAN can be retrieved with the HDS (Honda Diagnostic 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 off

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 micro switch to detect this. If open is indicated when the door is closed, replace the navigation unit.

F-CAN System Link F-CAN (Fast Controller Area Network) passes information between processors on the network. For example, the F-CAN network is used to pass fuel pulses between the PCM and the navigation unit for the trip computer function. The F-CAN network uses a communication protocol that transmits data at 500 Kbps.

- If the diagnostic screen below reads NG with the ignition switch ON (II), then diagnostic trouble codes (DTCs) for the F-CAN can be retrieved with the HDS (Honda Diagnostic System). The data displayed in the ID boxes is irrelevant.
- For more details on troubleshooting the F-CAN, refer to the multiplex system.

GPS Information This screen shows the current status of GPS reception. The circular diagram shows the current location of the GPS satellites (yellow dots) 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. There are always 24 ‘‘active'' GPS satellites in orbit. Because satellites fail, and have to be removed from service, spares 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 out side away from buildings, tall trees, and high-tension wires for at least 10 minutes with the engine running.

- 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 or not shown''.
- The ‘‘Current Position'' shows latitude, longitude, and elevation (in meters). If there are less than 3 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 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 ‘‘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.
The table of values shown on the screen below has the following columns:

Column | Description | Problem indication
--- | --- | ---
Active | Active satellites (Yellow Dot) | If ‘‘3D'' is missing, follow GPS icon is white or not shown troubleshooting.
PRN | The satellite ID number |
ST | The status: 0=cannot view or searching, 2=acquiring | If all 0, then, follow GPS icon is white or not shown troubleshooting.
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 volts when stopped.
- ‘‘Offset'' is the reference voltage or standard within the yaw rate sensor. It also should indicate about 2.500 volts 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 volts when stopped. If either reads zero, or 5.000 volts, 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: Car stopped

Normal | Abnormal
--- | ---
Offset | 2.526 V | Offset | 2.526 V
Sensor | 2.516−2.536 V | Sensor | 2.623 V

Example: Car 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.
- Touch ‘‘Tuning'' to view small but gradual yaw rate problems.

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 display dots.
- Do not touch the ‘‘CCW'' or ‘‘CW'', or ‘‘Set'' buttons. These are used for factory setup only.

Two tests are explained below. For gross 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 below.

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 above fails, please enter ‘‘Yaw rate sensor defective'' for the problem description, on the ‘‘Navigation core return form''.

Tire Calibrate As the vehicle moves, the navigation system receives speed pulses from the PCM. 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 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 ‘‘LEVEL'' 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 This screen is for factory use only, do not adjust. 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).
- ‘‘System Time'' is the internal time used by the navigation unit to calculate your position on the map. It is also in Greenwich Mean Time (GMT).
- ‘‘Display Time'' is the time shown on Setup screen 2 ‘‘Adjust Time Zone/Clock'', and reflects any changes due to daylight savings time or time adjustments entered by the customer.
- Date, Hour, Minute, and ‘‘Set'' should not be used.

Mic Level This diagnostic allows you to independently test the microphone and the Talk/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. In addition, the Mic Level indicator should move at least to the 6 th bar. If the Talk 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.

Solar Angle This screen is used to graphically display the sun's position as determined by GPS. The navigation system uses the sun's angle, along with the sunlight sensor to control the driver/passenger A/C air flow. The heat that must be removed by the A/C unit varies, depending on the angle of the sun entering the vehicle. This screen is for factory use only, and should not be adjusted.

- The screen shows a circular diagram of the sky oriented in the direction that the vehicle is pointing. During daylight hours a red dot is shown, representing the direction and elevation of the sun. The outer circle represents the horizon (0 degrees elevation). The middle circle is 30 degrees, the center circle is 60 degrees, and the very center is directly overhead (90 degrees).
- ‘‘Auto'' should always be on (yellow).
- The ‘‘Angle'', ‘‘Dir'', and ‘‘Reliability'' settings are used by the factory to simulate the sun's position for debugging this function.

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 or from a PC card.

- Program Flash is the version of the navigation program in memory.
- Program Disc is the version of the program on the DVD.
- The Values ‘‘IPL'', ‘‘APL'', ‘‘DBOOT'', and ‘‘System uCom'' are for factory use.
- The value for ‘‘Models'' should begin with the letters ‘‘SEAX'', and indicates that the navigation unit is for an ACCORD. If any other letters appear after ‘‘Models'', then verify the part number on the underside of the navigation unit, and replace the navigation unit if necessary.
- ‘‘Download'' should never be touched unless instructed by the factory. Touching download overwrites the navigation software version in memory, with the software version on the DVD.

NOTE: If any model number other than SEAX is displayed, replace the navigation unit with the correct part. The model code tells the navigation unit what software to load off the DVD.

Error Message Table

Screen Error Message | Solution
--- | ---
Navigation system is unable to acquire a proper GPS signal. | Make sure there is nothing on the rear package tray blocking the GOS antenna. If not, move the vehicle to an open space away from tall buildings, trees, etc. Rear window tinting and after-market devices can affect the GPS reception.
Navigation unit door is open or No DVD disc installed. Please check system. | Make sure the navigation DVD is installed with the label side up and the navigation unit door is fully snapped closed.
PC card slot door is open. Please check system. | Make sure that the sliding door for the PC card is fully closed.
No DVD disc, please check system. | Check that the navigation DVD is installed with the label side up.
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 then 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 temperate 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.