Acura CSX. Manual — part 607
GPS Information
23-142
Navigation System
• 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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*35
”
”
GPS Detail
23-143
GPS Information
GPS Detail
Return
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:xx
HDop: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).
08/08/21 14:07:32 61SNR030_230_0146
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−
−
Column
Description
Problem indication
Yaw Rate
23-144
Navigation System
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.
08/08/21 14:07:32 61SNR030_230_0147
+ −
−
*36
Example: Vehicle stopped
Normal
Abnormal
Example: Vehicle turning
Normal
Abnormal
Yaw Rate Tuning
23-145
Yaw Rate
Return
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.
08/08/21 14:07:33 61SNR030_230_0148
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