sensor ACURA CSX 2006 Service Repair Manual

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23-102Navigation System
System Description (cont’d)
Reverse signal
GPS antenna
AM/FM antenna Speakers
Navigation unit
Navi DVD
Navigation/Audio Display Screen
CLOCK
(Set by GPS)
Stereo Amplifier
(Premium sound
system)
Color
signal
Accessory
(MusicLink,
CD changer, etc.)
XM Receiver
XM antenna
(satellite &
terrestrial)
Auxiliary jack
assembly
Audio remote
switches
(steering wheel)
Illumination
Signal
(lighted buttons)
AM/FM
receiverCD Player
(CD, MP3, WMA)
Audio
processor
PC Card Slot (for playing audio
MP3, and WMA audio files) Navi
processor
(ECU)
GPS
receiver
Yaw rate sensor
(senses turning)
DVD player
(navi maps)
GA-Net
Audio
Audio
Section
Navigaion
Section
Illumination
(Night/Day
display mode)
ECM/PCM
(vehicle speed pulses) Microphone
(on ceiling) TALK/BACK
voice buttons
(’08 model) Climate control unit
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Navigation Function
Function Diagram
Vehicle Speed Pulse
23-103
STEERING BUTTONS MICROPHONE
GA Net bus AUDIO UNIT
LCD
SWITCH
Destination
DVD ROM
YAW RATE SENSOR GPS tuning
GPS RECEIVER
NAVIGATION UNIT
XM RECEIVER GPS ANTENNA Reception of radio
wave from satellite
Data pcocess
concerning map
and vehivle position
Perception of
vehicle position
ECM/PCM
(VEHICLE SPEED PULSE)
Detection of
travel distansce Detection of
vehicle position
Detection of
direction change
Correction of
map matching
Map scroll
Change of reduced
scale of map Guide
processing Audio
guidance
NAVIGATION
DISPLAY
VOICE
PROMPTS
Sensor power
NAVIGATION UNIT
ECM/PCM DISTANCE
DETECTION
CIRCUIT
The navigation system is composed of the navigation unit, the ECM/PCM (vehicle speed signal), the GPS antenna, the
microphone, the voice control switch, the XM receiver, and the climate control unit.
These units communicate with each other on the GA-Net bus.
The vehicle speed pulse is sent by the ECM/PCM. The ECM/PCM receives a signal from the countershaft speed sensor,
then it processes the signal, and transmits it to the speedometer and other systems.
(cont’d)
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ÎYaw Rate Sensor
Sensor Element Structure
Oscillation Gyro Principles
Operation
23-105
Enlarged view of sensor element
DETECTING PIEZOELECTRIC
PARTS
OSCILLATORS
SUPPORT PIN
DRIVING
PIEZOELECTRIC
PART
METAL BLOCK MONITORING PIEZOELECTRIC
PARTBend
Oscillation
Coriolis forceTurn to
right
Coriolis force
Oscillation
Sensor element top view
The yaw rate sensor (located in the navigation unit) detects the direction change (angular speed) of the vehicle. The
sensor is an oscillation gyro built into the navigation unit.
The sensor element is shaped like a tuning fork, and it consists of the piezoelectric parts, the metal block, and the
support pin. There are four piezoelectric parts: one to drive the osc
illators, one to monitor and maintain the oscillation
at a regular frequency, and two to detect angular velocity. The two osc illators, which have a 90-degree twist in the
center, are connected at the bottom by the metal block and supported by the support pin. A detection piezoelectric part
is attached to the top of each oscillator. The driving piezoelectric part is attached to the bottom of one oscillator, and
the monitoring piezoelectric part is attached to the bottom of the other oscillator.
The piezoelectric parts have electric/mechanical transfer characteristics. They bend vertically when voltage is applied
to both sides of the parts, and voltage is generated between both sides of the piezoelectric parts when they are bent by
an external force. The oscillation gyro functions by utilizing this characteristic of the piezoelectric parts and Coriolis
force. (Coriolis force deflects moving objects as a result of the earth’s rotation.) In the oscillation gyro, this force
moves the sensor element when angular velocity is applied.
1. The driving piezoelectric part oscillates the oscillator by repeatedly bending and returning when an AC voltage of 6 kHz is applied to the part, The monitoring-side oscillator resonates because it is connected to the driving-side
oscillator by the metal block.
2. The monitoring piezoelectric part bends in proportion to the osc illation and outputs voltage (the monitor signal).
The navigation unit control circuit controls the drive signal to stabilize the monitor signal.
3. When the vehicle is stopped, the detecting piezoelectric parts osc illate right and left with the oscillators, but no
signal is output because the parts are not bent (no angular force).
4. When the vehicle turns to the right, the sensor element moves in a circular motion with the right oscillator bending forward and the left oscillator bending rearward. The am ount of forward/rearward bend varies according
to the angular velocity of the vehicle.
5. The detecting piezoelectric parts output voltage (the yaw rate signal) according to the amount of bend. The amount of vehicle direction change is determined by measuring this voltage.
(cont’d)
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Navigation Unit
Calculation of Vehicle Position
Map Matching Tuning
GPS Tuning
Distance Tuning
Route Guidance
Audio Guidance
DVD-ROM
23-107
The navigation unit calculates the vehicle position and guides you to the destination. The unit performs map matching
correction, GPS correction, and distance tuning. It also controls the menu functions and the DVD-ROM drive, and
interprets voice commands. With control of all these items, the navigation unit makes the navigation picture signal,
then it transmits the signal to the navigation display and audio driving instructions to the audio unit.
The navigation unit calculates the vehicle position (the driving direction and the current position) by receiving the
directional change signals from the yaw rate sensor and the travel distance signals from the PCMs vehicle speed pulse
(VSP) signal.
The map matching tuning is accomplished by indicating the vehicle position on the roads on the map. The map data
transmitted from the DVD-ROM is checked against the vehicle position data, and the vehicle position is indicated on
the nearest road. Map matching tuning does not occur when the vehicle travels on a road not shown on the map, or
when the vehicle position is far away from a road on the map.
The GPS tuning is accomplished by indicating the vehicle position as the GPS’s vehicle position. The navigation unit
compares its calculated vehicle position data with the GPS vehicle position data. If there is large difference between
the two, the indicated vehicle position is adjusted to the GPS vehicle position.
The distance tuning reduces the difference between the travel distance signal from the VSP and the distance data on
the map. The navigation unit compares its calculated vehicle position data with the GPS vehicle position data. The
navigation unit then decreases the tuning value when the vehicle position is always ahead of the GPS vehicle position,
and it increases the tuning value when the vehicle position is always behind the GPS vehicle position.
The navigation unit can calculate different routes to a selected destination. You have five options:
 Direct Route Calculate a route that is the most direct.
 Easy Route Calculate a route that minimizes the number of turns needed.
 Minimize Freeways Calculate a route that avoids freeway travel. If that is not possible, keep the am ount of
freeway travel to a minimum.
 Minimize Toll Roads Calculate a route that avoids, or minimizes travel on toll roads.
 Maximize Freeways Calculate a route that uses freeways as much as possible.
The navigation unit transmits audio driving instructions before entering an intersection or passing a junction.
The audio instructions come through the audio unit to the front speakers.
NOTE: The front speakers are muted whenever the navigation system is giving guidance commands, and all of the
speakers are muted when the voice control system is being used.
The map data (including all scale rates) is stored in the DVD-ROM. The map data includes:  Road distances, road widths, speed limits, traffic regulations, passing time at junction, distances to junctions, and the driving instructions for audio guidance.
 Latitude and longitude GPS.
(cont’d)
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ÎAudio Unit (Built in the navigation unit)
Navigation Display
Microphone
Navigation TALK Button
Navigation BACK Button
23-108Navigation System
System Description (cont’d)
The audio unit receives the audio driving instructions from the navigation unit, and transmits the instructions through
the front speakers even when the audio system is in use.
The navigation display uses liquid crystal display (LCD). The LCD is a 6.5-inch-diagonal, thin film transistor (TFT),
stripe type with 65,536 color, The color film and fluorescent light are laid out on the back of the liquid crystal film. The
touch sensor on the front of the LCD consists of a touch sensitive resistive membrane with an infinite number of
possible touch locations.
The microphone (on the ceiling, near the front map light) receives voice commands and transmits them to the
navigation unit for interpretation.
Activates the voice control system in the navigation unit to accept voice commands.
Returns the display to the previous screen (similar function as the CANCEL button).
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Glossary
Item Definition
23-109
The following is a glossary of terms pertaining to the Voice Recognition Navigation System.Active noise cancellation
(ANC) The active noise cancellation system cancels some of the vehicle noise. This occurs in the 1,500 2,400 rpm
range. Microphones detect the low frequency sound, and the system outputs a canceling sound from the audio
speaker.
Address Book The HFL system can import a copy of the phone book from and approved HFL compatible phone and display the imported phone book on the navigation screen as the address book. See the Owner’s Manual for more
information.
B-CAN Body CAN Bus (see CAN)
Bread-crumbs (White
dots) Off road tracking dots that can be followed on the map to retrace your route back to a mapped (digitized) road.
This function can be turned on/off in Setup screen 1.
CAN Controller Area Network. This communication network allows processors in the vehicle to send/receive information. The fuel pulses used by the MID trip computer are received from the ECM/PCM using the F-CAN
(Fast Controller Area Network) bus.
CPU Central Processing Unit. The main device within the navigation unit that coordinates the rest of the electronic functions.
CSS Countershaft (Output) Speed Sensor. This sensor reads the output shaft speed at the transmission and provides a speed pulse to the ECM/PCM.
Database This consists of the Map data, and the POI (Points Of Interest) data stored on the DVD.
DBW Drive By Wire. Allows electrical control of the throttle without the need of a mechanical linkage.
DCA Detailed Coverage Area. Main metropolitan areas in the Lower 48 states, and Canada are mapped to this level. See the navigation system manual for a list of these areas.
DTC DTC Diagnostic Trouble Codes. Use HDS tablet to obtain, and troubleshoot the cause of these codes.
Dead reckoning The use of the speed signal, and yaw rate sensor to position the vehicle on the map even when tall buildings, or driving in a tunnel obscures the GPS signal.
Digitized road A road that appears on the navigation screen. The road name appears at the bottom of the navigation screen. If the user drives off road, the navigation system displays not on a digitized road, and after 1/2 mile, the bread-
crumbs appear.
Disclaimer screen Screen containing cautionary information. It is meant to be read carefully and acknowledged by the customer when using the navigation system.
DVD or DVD-ROM Digital Versatile Disk. The navigation program and database resides on this disk. See the Navigation Owner’s Manual for information on how to order a replacement or an update DVD.
ECM Engine Control Module. Typically referred to as the ECM.
FAQ Frequently Asked Questions. See the navigation system manual for a list of the customer FAQs, and troubleshooting information.
F-CAN Fast CAN Bus (see CAN)
GA-NET The GA-NET allows the audio unit to communicate with all the audio and navigation components in a vehicle. If there is an open in the GA-NET, components or the entire audio and navigation system may appear inoperative.
GPS Global Positioning System. A network of 24 satellites in orbit around the earth. The navigation system can simultaneously receive signals from up to 12 satellites to accurately position the vehicle on the map.
HDS Honda Diagnostic System. A hand held tablet PC used for diagnosing vehicle problems. This device can be used to obtain DTC codes for diagnosis of the navigation system and CAN related problems.
HFL HandsFreeLink uses Bluetooth technology as a wireless link between it and an approved Bluetooth compatible cell phone. See the vehicle Owner’s manual or Quick Start Guide for more information.
HIP (AcuraLink) Honda Information Platform (see AcuraLink)
H/U Head Unit. The audio unit in the dash.
Initialization This refers to the period needed to re-acquire the GPS satellite orbital information whenever the navigation system power has been disconnected. This can take from 10 to 45 minutes.
Interface Dial This control device consists of a rotating knob and the buttons surrounding it. This device allows control of the navigation, audio, and climate functions displayed on the screen.
Jog Dial See interface dial.
(cont’d)
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ItemDefinition
23-110Navigation System
System Description (cont’d)
LCD
Liquid Crystal Display (the navigation screen)
Map matching The received GPS information allows the navigation system to position the vehicle on the map. Map matching
has occurred if the map screen displays the current street name in the bottom-shaded area.
Mic Abbreviation for the microphone used for receiving voice commands. It is located near the map light in the
ceiling. The ANC circuit may also use it to check its tuning.
MID Multi-Information Display
MW Maneuver Window. While on-route to a destination, this window displays information about the next maneuver.
Navi Abbreviation for the Navigation System.
Off-road tracking See bread-crumbs.
Off route Off route This occurs when the user leaves mapped roads. Off road tracking dots (bread-crumbs) are displayed if
the option is enabled in the setup menu. The user can use them to return to a mapped road. The bottom of the
navigation screen displays Not on a digitized road.
Outlying areas These are rural areas that typically have only their main roads mapped. All other roads are shown in light brown
for reference only, since they have not been verified.
Paired Linking your cell phone to the HFL.
PC Card slot PC Card Slot The PC Card (PCMCIA, type II) slot is for factory use only. Make sure that the sliding door is closed at
all times, if opened, an error message is displayed on the screen.
PCM Powertrain Control Module. This unit supplies the navigation system speed signal, also refered to as PCM.
PCMCIA A computer industry defined term referring to the PC Card slot standard.
PIN Personal Identification Number, a random 4 digit number created by the customer to protect personal
information.
POI Point Of Interest. These are the businesses, schools, etc. found under the places option on the main menu.
Polygon Colored areas on the map screen denoting parks, schools, etc. See the Navigation System Manual Driving to
Your Destination for a list of the assigned colors.
QWERTY Keyboard layout resembling the typewriter keys. The keyboard layout can be changed to an alphabetical layout
in the Setup mode.
SCS connector The service check signal 2-pin connector used to put the navigation system into the diagnostic mode.
Security code Code needed to activate the navigation system. You can get the security code from the iN by entering the
navigation unit serial number. You can find the serial number on the diagnostic screens (unit check, Navi ECU),
or on the underside of the navigation unit.
Tuning A continual update of internal navigation system scaling factors. See the individual sensor tuning discussions
under either System Description, or System Diagnosis Mode (see page 23-135).
Unverified Streets These streets have not been verified for turn restrictions, one-way, etc. They appear light brown on the map. You can enter address destinations in these areas, but depending on your Unverified Routing choice in setup, voice
guidance may end at the last verified street closest to your destination.
USB Universal Serial Bus. the USB is used for playing the compressed audio files (MP3, WMA, and AAC) on the
external device through the audio unit.
Verified streets These streets consist of the detailed metropolitan coverage areas, and all other inter-town connection roads.
These roads are shown in black or red on the map. (interstates are red)
VP Vehicle Position. When in map mode, this circular icon shows the vehicle position on the map.
VR Voice Recognition. This allows voice control of many of the navigation functions. The hardware consists of the
microphone, voice control switch (navigation TALK/BACK buttons), and the center speaker. See the overview for
more information.
VSP Vehicle Speed Pulse. This pulse signal coming from the PCM (via the CSS) is used to update the Vehicle position
on the map. These pulses do not indicate direction (forward or backward). When in reverse, the navigation
receives a signal and directs the VP to move backwards on the map.
XM This device receives information from the XM satellites and passes XM audio information to the audio unit. In
addition, traffic information is sent to the navigation unit.
Yaw Sensor This device is located in the navigation system control unit and senses the side-to-side twisting force generated
when the vehicle turns. See a detailed description of how this sensor works in system description.
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Vehicle position icon constantly leaves road,
moves erratically, or is displayed very far
from actual position Vehicle icon wanders across the map when
driving (does not follow a displayed road) or
map or vehicle ICON spins
YES
NO
YES
NO YES
NO
23-12623-126Navigation System
Symptom Troubleshooting (cont’d)
NOTE:
 Check the vehicle battery condition first.
 Make sure that the correct DVD color and version are installed.
 Check any official Honda service website for more service information about the navigation system.
 Check for aftermarket accessories.
1. Check the GPS icon on the navigation picture.
Do the troubleshooting for GPS icon is white
or not shown (see page 23-122).
Go to step 2.
2. Go into the Diagnostic Menu, and use the Yaw Rate test (see page 23-144) to check the yaw rate sensor.
3. Go into the Diagnostic Menu and use the Car Status test (see page 23-141) to check the vehicle speed
pulse.
The problem may be a normal characteristic.
Check to see if the problem occurs in the same
place. If it does, the problem could be in the
database. Compare to a known-good vehicle under
the same conditions. If you can duplicate the
problem, report it. Refer to the client Assistance
section of the Navigation User’s Guide, ‘‘Reporting
Errors’’.
If the problem is the yaw rate sensor, replace
the navigation unit (see page 23-155). If the
problem is the vehicle speed pulse, troubleshoot
the vehicle speed signal circuit. NOTE:
 Check the vehicle battery condition first.
 This symptom is usually caused by a defective yaw rate sensor. Perform this diagnostic when the vehicle
is cold and warm.
 Also refer to symptom troubleshooting for GPS icon is white or not shown (see page 23-122).
1. Go into the Diagnostic Menu, and use the Yaw Rate test (see page 23-144).
The system is OK.
Replace the navigation unit (see page 23-155).
I s t he GPS i con on t he map scr een?
Ar e t he y aw r at e sensor and v ehi cl e speed pul seOK ? Ar e the values cor r ect?
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Black Raster
Color Pattern
Monitor Adjustment
Touch Panel Check
23-138Navigation System
System Diagnostic Mode (cont’d)
Black Raster
Color PatternReturn
Return
Red
Green
Blue
Monitor AdjuntmentReturn
Tuning
Default
(0,0)
Default (0,0)
Setting
H-POS
Return
X:0 Y:0 X:227 Y:111
X:479 Y:233
The entire display must be black. This diagnostic screen
checks for pixels that may be stuck (on). If pixels are
stuck on, replace the navigation unit.
The chart below shows the colors being used for the
various screens. This is for factory use only. To check
the color signal use the RGB test. It is unlikely that you will ever need to adjust the
monitor position. This is for factory use only. The
Default button will reset the display position to factory
specifications. The factory default is 0, 0. The H-POS
button is for factory use only.
The panel touch sensing system consists of a touch
sensitive resistive membrane covering the display.
Contrary to other systems using infrared beams, the
screen has to be physically touched to make it work.
The display has the capability of 479 touch locations
(left to right), and 233 touch locations (top to bottom).
The upper left hand corner is position (0, 0) and the
lower right hand corner is (479, 233) as displayed.
Touching anywhere on the screen displays the
coordinate of the location, and a icon appears where
you touched the screen. If any area of the screen either
doesn’t respond, or responds at some other location
when touched, then replace the navigation unit.
NOTE: Unlike earlier screens that used infrared sensors,
direct sunlight will not affect this test.
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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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