Navigation System Diagnostic Mode

Start-up procedure and Diagnosis Menu

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.
  

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.
  

• 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
  

• 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
  

• 
  
• ILL CANCEL
  a) OFF (0) when the gauge assembly brightness control is less than 90 % bightness
  b) ON (1) when the gauge assembly brightness knob is more than 90 % brightness.
  

• 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
  

• DVD Lid-senses if DVD door is open
  a) (Close) when door is closed
  b) (Open) when door is open
  

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''.
  

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).
  

Yaw Rate

This diagnostic checks the yaw rate sensor in the control unit. This device detects when the vehicle turns, and repositions the vehicle postion 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.
  

Yaw Rate Tuning

• 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.
  

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.
  

• 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 ucomare 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