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GPS Information
23-142Navigation System
System Diagnostic Mode (cont’d)
ILL-Illumination Indication
(Navigation unit connector A (17P) terminal No. 10)
a) OFF (0) when parking lights, or headlights are off
b) ON (1) when parking lights, or headlights are on
The navigation unit uses the signal to determine
whether to put the navigation screen into the Day or
Night brightness mode. (Setup screen 1)
Display-this displays the current position of the display
a) (Close) when the display is closed
b) (Open) when the display is open
The navigation unit has a micro switch to detect this. If
open is indicated when the display is closed, replace
the navigation unit. 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.
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:
When you use this screen for troubleshooting, park the vehicle 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
4 or more icons. If not, troubleshoot for GPS icon is
white or not shown (see page 23-122).
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 client in Setup function Adjust
Time Zone/Clock.
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GPS Detail
23-143
GPS Information
GPS DetailReturn
Number of Satellites
Current Position Latitude: Nxx°xx’xx
Elevation: 0 feet Longitude: Exxx°xx’xx
xxxx.xx.xx xx:xx:xx
Return
In Use
Search
TS:xx
AS:xxHDop:xx.x
VDop:xx.x
Speed: x.xMi/h
Direction: x ° Date :xxxx.xx.xx
Time:xx:xx:xx
xx
PRN
xx
xx
xx
xx
xx xx
ST
xx
xx
xx
xx xx xxx
xxx
xxx
xxx
xxx
xxx
AZI
xx
EL
xx
xx
xx
xx
xx xxx
C/N
xxx
xxx
xxx
xxx xxx xx
ACC
xx
xx
xx
xx
xx
3D
1/2
NOTE:
Push and hold the Map/Guide button, and the dots on
the diagram are replaced with the PRN (satellite
numbers). These numbers correspond to the numbers
in the PRN column on the GPS details screen. 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.
NOTE: The data shown is an example only.
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
(see page 23-106).
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).
(cont’d)
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µµµ
ColumnDescription Problem indication
Yaw Rate
23-144Navigation System
System Diagnostic Mode (cont’d)
The table of values shown define the terms at the top of
the columns in the GPS detail screen.
3D Active satellites (Yellow Dot) If 3D is missing
follow GPS icon is
white or not shown
(see page 23-122).
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
(see page 23-122).
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 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
(see page 23-105).
Sensor indicates the voltage output from the yaw rate sensor. It should indicate about 2.500 V when the
vehicle is stopped.
Offset is the reference voltage or standard within the yaw rate sensor. It also should indicate about 2.500 V
when the vehicle is 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 the vehicle is stopped. If either
reads zero or 5.000 V, replace the navigation unit.
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Î Example: Vehicle stopped
Normal Abnormal
Example: Vehicle turning
Normal AbnormalYaw Rate Tuning
23-145
Yaw RateReturn
Sensor Offset
CCW Factor
CW Factor x.xxxV
x.xxxV
0.0%
0.0% Set
Tuning
The yaw rate offset and sensor should be within /
0.01 V of each other when the vehicle is stopped. The
sensor value should change relative to the offset as
the vehicle turns while driving. If not, replace the
navigation unit.
Offset 2.526 V Offset 2.526 V
Sensor 2.516 2.536 V Sensor 2.623 V
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. 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 functions properly,
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.
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.
(cont’d)
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Tire Calibration
23-146Navigation System
System Diagnostic Mode (cont’d)
Return
Set
Reset
CCW CW
Tuning 0.0%
ANG-Disp 0° Return
Auto Tuning OFF
Level0
xx.xx%
Set
Study
Tire Cal. TuningTire Calibrate
ON
OFF
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 unit.
2. 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 unit’s yaw sensor is defective.
You can touch Reset to clear ANG-Disp, and dotted
line.
3. If either test fails, please enter ‘‘Yaw rate sensor defective’’ for the problem description, on the
‘‘Navigation core return form’’. As the vehicle moves, the navigation system receives
speed pulses from the ECM/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
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.
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Functional Setup
’06 model
’07-08 modelsLog Data
23-147
Functional Setup
Log Data
GPS Send Time Demo Mode Mic Level
Solar Angle
Functional Setup
Log Data
GPS Send Time Demo Mode Mic Level
Solar Angle
Save Users MemoryReturn
Return
Log Data
Log DataReturn
PC Card is not inserted.
Return
Logging VP Data OFF
ON OFF
Select the item you want to check.
LogData
GPS Send Time
Demo Mode
Mic Level
Solar Angle
Save Users Memory (’07-08 models) This screen allows the factory to collect log data to
troubleshoot navigation system issues.
There is no card in the PC card Slot, the screen appears as:
However, if the factory provides a PC card, insert it into the card slot (label side up). Follow the factory
logging VP data procedure for gathering test data and
properly ending the test.
(cont’d)
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GPS Send Time
Demo Mode
Mic Level
23-148Navigation System
System Diagnostic Mode (cont’d)
Send GPS TimeReturn
GPS Time
Second
Year
Day Hour
Minute
xxxx.xx.xx xx:xx:xx
Set
xxxx
xx
Month xx
xx
xx
xx
Demo Mode
OFF
Demo
Speed Rate 150 ms ON OFFReturn
Return
Steering Switch Mic Level
Mic Level
BACK
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.
This screen allows the navigation system to drive a
route, when the vehicle is stationary. Typical
applications include auto shows, and other events.
This feature allows a visitor to enter a destination, and
see the system drive to the destination. No speed signal
is needed. To initiate the mode, select ON.
Changing the speed rate in ms (millisec onds) is
optional, and represents the time between updates of
the VP (vehicle position) movement.
– When you increase the rate, the VP slows down because it is updated (moved) at a slower rate.
– When you decrease the rate, VP is faster because it is updated (moved) more frequently.
– 1500 ms is VP at its slowest in demo mode.
– 150 ms is VP at its fastest in demo mode (Default).
At key off, the setting automatically returns to the default of Off. This diagnostic screen allows you to independently test
the microphone and the navigation 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 navigation TALK button on the steering wheel, wait unit you hear a beep, and in a normal
voice say ‘‘testing’’. The TALK indicator on the screen
should momentarily turn green, and the text ‘‘Now
Recording...’’ should appear in yellow. If the talk
indicator on the screen does not briefly turn green,
then check the wiring from the navigation 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 navigation unit.
If the mic level bar is full or almost full wit hout you
speaking or other back ground noise, replace the
microphone and recheck.
PressthenavigationBACKbuttononthesteering wheel. The Cancel indicator on the screen should
momentarily turn green. If it does not briefly turn
green, then check the wiring from the steering wheel
navigation BACK button to the navigation unit.
NOTE: The mic level should reach the 6th bar.
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ÎÎ
Solar angleVersion
23-149
Solar Angle
Manual Tuning
Angle Direction
Reliability
33.0
Vehicle 143.0 307.0
3
OFF
ON
DownLoad
ReturnVersionReturn
Program Flash 0.99.20.
Program Disc 0.99.0800 IPL 0.230.000
APL 0.200.122
DBOOT 0.241.122
System uCom 0.910.000
Model SNRA
OFF
This screen graphically displays 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 the 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. 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.
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 SNR 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 SNR 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.
(cont’d)
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