navigation update ACURA CSX 2006 Service User Guide

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Volume does not increase with speed (with
navigation)
YES
NO
YES
NO
YES
NO YES
NO
23-222Audio System
Symptom Troubleshooting (cont’d)
NAVIGATION UNIT CONNECTOR A (24P)
VSP (BLU)
NOTE: Check the vehicle battery condition first.
 Check the connectors for poor connections or loose terminals.
1. Verify the SVC mode setting in the navigation unit sound set-up.
Change the setting to Mid and retest
(see page 23-164).
Go to step 2.
2. Do the self-diagnostic function for the vehicle speed pulse indication (see page 23-190).
Substitute a known-good navigation unit
(see page 23-355), and retest. If the symptom/
indication goes away, replace the original
navigation unit.
Go to step 3.
3. Test-drive the vehicle at highway speeds, and monitor if the volume increases.
Intermittent failure, the system is OK at this
time.
Go to step 4. 4. Remove the navigation unit (see page 23-355) and
disconnect navigation unit connector A (24P).
NOTE: Eject all the discs before removing the navigation unit to prevent damaging the CD player’s load
mechanism.
 Remove the PC card before removing the navigation unit.
5. Drive the vehicle, and have an assistant measure voltage at navigation unit connector A (24P)
terminal No. 15.
Replace the navigation unit (see page 23-355).
Repair open or shorts in the wire between
navigation unit connector A (24P) terminal No. 15
and ECM/PCM connector A (44P) terminal No. 29. If
no opens or shorts are found, Update the ECM/
PCM (see page 11-227) if it does not have the latest
software or substitute a known-good ECM/PCM
(see page 11-228).
Wire side of female terminals
Is the SVC set to off?
Does t he sel f -d i agnost i c f unct i on i nd i cat e a V SPsi gnal ?
Do t he v ol ume i ncr ease? Is there a 0 5 V Pulse?
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Volume does not increase with speed
(without navigation)
YES
NO
YES
NO
YES
NO YES
NO
23-223
AUDIO UNIT CONNECTOR A (17P)
VSP (BLU)
NOTE: Check the vehicle battery condition first.
 Check the connectors for poor connections or loose terminals.
1. Test-drive the vehicle at highway speeds, and monitor if the volume increases.
Intermittent failure, the system is OK at this
time.
Go to step 2.
2. Verify the SVC mode setting in the audio unit sound set-up.
Change the setting to Mid, and retest
(see page 23-164).
Go to step 3.
3. Do the self-diagnostic function for the vehicle speed pulse indication (see page 23-190).
Substitute a known-good audio unit
(see page 23-256), and retest. If the symptom/
indication goes away, replace the original audio
unit.
Go to step 4. 4. Remove the audio unit (see page 23-256) and
disconnect audio unit connector A (17P).
NOTE: Eject all the discs before removing the audio
unit to prevent damaging the CD player’s load
mechanism.
5. Drive the vehicle, and have an assistant measure voltage at audio unit connector A (17P) terminal
No. 13.
Replace the audio unit (see page 23-256).
Repair open or shorts in the wire between
audio unit connector A (17P) terminal No. 13 and
ECM/PCM connector A (44P) terminal No. 29. If no
opens or shorts are found, Update the ECM/PCM
(see page 11-227) if it does not have the latest
software or substitute a known-good ECM/PCM
(see page 11-228).
Wire side of female terminals
Do t he v ol ume i ncr ease?
Is the SVC set to off?Does t he sel f -d i agnost i c f unct i on i nd i cat e a V SPsi gnal ? Is there a 0 5 V Pulse?
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Map MatchingObtaining A Navigation DVD
23-269
Something is interfering with the system’s ability to
acquire its location. Check the following:
* The vehicle must be in an open area with a clear
* Remove sources of GPS interference like metallic
* Check GPS antenna cable connection.
* Restart the engine and repeat the GPS acquire view of the sky.
window tint above antenna, or electrical items
near antenna(see owner’s manual for details).
procedure. If the problem persists, see your dealer.
If this procedure is not necessary, the system proceeds
directly to the Disclaimer screen. During initialization,
the system searches for all available GPS satellites, and
obtains their orbital information. During this procedure
the vehicle should be out in the open with a clear view
of the sky.
If the navigation system finds the satellites properly,
this box clears, and changes to the Disclaimer screen. If
within 10 minutes the system fails to locate a sufficient
number of satellites to locate your position, the
following screen appears.
It this screen appears, turn off the engine, then restart
the vehicle and move it to a different location. If the
disclaimer screen appears, the GPS initialization is
complete.
NOTE:
 The average acquiring time is less than 10 minutes, but it can take as long as 45 minutes.
 If the system is still unable to acquire a signal, follow the instructions on the screen. If this screen appears
again, go to troubleshooting for the GPS icon is white
or not shown (see page 23-341).
 Skip to a CSF screen by pushing the MENU and INFO buttons at the same time and can move to an System
Links screen.
This part of the initialization matches the GPS
coordinates with a road on the map screen. To do this
part of the procedure, make sure that the navigation
system is displays a map, and drive the vehicle on a
mapped road shown on the map screen. Do not enter a
destination at this time. When the name of the current
road you are driving on, appears at the bottom of the
screen, the entire procedure is complete. Your system
is now ready to use. If the Navigation DVD is lost or damaged, or you need a
yearly
updated DVD, you have two ways to purchase
one. You can either call 888-549-3798, or order on-line
at www.acura.com.
Both methods require a credit card. The DVD cannot be
ordered through the parts system. The following DVDs
will not work in this navigation system:
 Earlier model navigation DVDs (black, orange, light blue label and the older versions with a white label)
 Map software programs manufactured by other companies
 DVD movies, or DVDs containing audio recordings
Update DVDs are available for purchase usually in the
fall of each year. They may contain the following:  Enhanced maps and points of interest (POI) coverage
 Fixes for minor software bugs
 Additional features
NOTE:  Map matching must be done any time the DVD is removed or replaced.
 Always order navigation DVDs on an as-needed basis. During a typical model year, each color DVD may
undergo a half a dozen software only version
upgrades to fix minor issues on some or all models
the DVD supports. This is normal. Usually only the
letter at the end of the version number changes,
while the database (maps and POIs) remain
unchanged.
 Never promise your customer future free updates.
There are no free programs for updating the
navigation DVD. Update DVDs are generally available
for purchase each fall. The online DVD order site
provides information when an update for a particular
color DVD is available.
 Damaged discs are not covered by warranty unless they have been damaged by the navigation system.
(cont’d)
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How to Identify Navigation DVD Versions,
and How to Inspect A DVD for Damage
23-271
To determine the navigation version on a particular
model, start the engine, then locate the navigation unit.
Open the DVD door, and push the eject button to eject
the DVD. Hold the DVD by the edges, and check for
these items: Check any official Acura service website for more service information about the navigation DVDs.
 The DVD label color.
 Read the DVD version on the label, and note it on the repair order. The version number is near the bottom
of the label text (for example, ver: 4.23A). You will
need this version number:
– To verify that the DVD version is appropriate for the vehicle. Check any official Honda service website
for more service information.
– Any time you call Tech Line regarding a navigation system issue.
– To answer client inquires concerning update or coverage issue.
NOTE: Client’s may obtain DVDs from sources
outside the normal ordering process. If you
determine this is the case, recommend that your
customer purchase the appropriate DVD from the
Acura Disc Fulfillment Center (see ORDERING A
DVD).
– Check the underside of the DVD for signs of mishandling. Deep scratches, or random scratches,
light swirl marks, or fingerprints can cause random
lock-ups, reboots, erratic voice response, erratic
positioning errors, and DVD read or format errors.
NOTE: A damaged DVD is not covered under
warranty unless the disc is damaged by the
navigation unit. Damage by the navigation unit
typically appears as circular scratches caused by
something rubbing against the DVD as it spins. The
damage may appear as arcs or complete circles on
the DVD reading surface.
– Verify that the underside of the DVD is silver, and not a copy with a blue color. Copies will not work
properly and can cause other symptoms that mimic
hardware problems.  Incorrectly colored DVDs being put into navigation
vehicles. This causes the system to either display
error messages, or causes system malfunctions that
mimic a hardware problem. This results in the client
leaving with a malfunctioning navigation system.
 The DVD version provided to the client is out-of date or incompatible with a particular model. This
inconveniences your client by delaying the repair, or
by causing additional (and unnecessary) returns to
your dealership.
 The client experiences bugs or other issues that have already been resolved in later versions currently
available at the fulfillment desk.
If the DVD is defective, or has any of the issues
mentioned above, return the vehicle to your client and
recommend that they order the proper DVD from the
Acura Disc Fulfillment Center.
NOTE: Navigation DVDs do not come with replacement
navigation units. If you are replacing a navigation unit
because it is defective (following appropriate service
manual troubleshooting), and the DVD does not eject,
order a DVD. See Obtaining a navigation DVD.
(cont’d)
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How to Answer Client Questions About
Navigation CoverageHow do I find the local address of a business
that is part of a national chain (for example,
Starbucks)?
Precaution on Client ‘‘Sneak Previews’’
Is my address covered by the navigation system?
Is my city covered by the navigation system?
The gas station on my corner is now a restaurant. Why
is it still incorrect in the navigation system?
23-272Navigation System
General Troubleshooting Information (cont’d)
Some clients may ask questions regarding a city,
address, or POI (point of interest) covered by the
navigation system. It is better to verify a coverage
question on an actual vehicle than to disappoint your
client by promising coverage that may be incomplete or
missing in their area. The following suggestions can be
used to answer coverage inquiries from your client.
Using a current production vehicle (of the same model),
try and enter the client’s address (street first) to see if
their area is covered. Always enter the street first,
because sometimes their city may be included in a
neighboring township, or under some larger
metropolitan city name. If the address is shown in a
later year vehicle, but not your client’s vehicle, you
might recommend that your client purchase an update.
For general questions about whether a city is covered,
view the map coverage link on the DVD order site. On
the site, select a year, and select a model, then click on
the Coverage link. You then select a state or province,
and the cities are listed. Of course, this does not
guarantee that the customer’s road or address is in the
system. Verifying on an actual production vehicle is
always the best guarantee that your information is
accurate.
For POI-related client questions, explain that
businesses are constantly moving, and there can be a
considerable lag in updating the m
illions of POIs in the
system. The database is updated annually, and the best
way to the verify whether the POI is accurate is verify
the inquiry on a current production vehicle.
Answers to these and other questions regarding
coverage can be found in these locations:
 In the Frequently Asked Questions section of the navigation system manual.
 At the online DVD order site, by clicking on the FAQs link. There are three ways to find the local address to
businesses:
 If you know the phone number of the business, select Phone Number and enter the 10 digit phone number
(area code plus seven digit number).
 Select Category, then Restaurant. Enter the keyword Star. The resulting list includes all restaurants that
have the letters Star anywhere in the name.
 Select Name and enter Starbucks. For more common business names, like McDonalds, you may have to
search through a list that includes other businesses
like McDonalds Welding, McDonalds Automotive, etc.
Your client might request a look (or sneak preview) at
features in the latest navigation software. You should
never preview a navigation DVD in a client’s vehicle.
Inserting a newer DVD installs the latest software from
the DVD into the memory of the client’s navigation
system. When the original DVD is reinstalled, the newer
software remains in memory and is often incompatible
with the client’s original DVD Map and POI database, or
software.
If your client wishes to see the latest navigation
coverage or software features, demonstrate it on an in-
stock vehicle that already has the latest DVD version.
If a newer version is loaded either by the dealer or the
client, the only remedy is to enter the navigation
diagnostic mode’s Version screen and do a forced
download. Check any official Honda service website for
more information about what patches may need
reinstalling.
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Overview
23-279
System Description
The navigation system is a highly sophisticated, hybrid locating system.
The navigation unit uses global positioning system (GPS) satellite signals, internal yaw and vehicle speed inputs, and
a map database to show where the vehicle is and to help guide you to a desired destination.
The navigation unit’s GPS receiver receives signals from the GPS, a network of 24 satellites in orbit ar ound the earth.
By receiving signals from several of these satellites, the navigation system can determine the latitude, l ongitude, and
elevation of the vehicle.
Signals from the system’s yaw rate sensor (inside the navigation unit) detects turns, and the ECM/PCM vehicle speed
pulse (VSP) and reverse signal enable the system to keep track of the vehicle’s speed and direction of travel. The
advantage of this hybrid system is that the system can track your position if either the GPS signal or the vehicle speed
signal is missing. For instance, when in a tunnel (no GPS), the speed signal is used to update your position on the map.
Alternately, while the vehicle is being transported on a ferry, GPS signals can show the vehicle position on the map as
it crosses the water.
The navigation system uses the location, direction, and speed information to display the appropriate map and
calculate a route to the destination entered. As you drive to a destination, the system provides both visual and audio
guidance. Audio guidance is sent to the audio unit, and an RGB graphics color signal is sent to the navigation display.
This navigation system also has voice recognition that allows voice control of most of the navigation, and audio
functions. The voice control switches (navigation TALK and navigation BACK buttons on the steering wheel) activate
the voice control system. The microphone on the ce iling receives your voice commands. For more information on this
feature, consult the navigation owner’s guide.
The illumination signal is used by the navigation unit to automatically switch the display mode between the Night and
Day display modes. When the headlights are on, the dash brightness control setting full brightness overrides the Night
display mode, and allows a daytime navigation display with the lights on.
When the navigation system is giving voice guidance commands, the front speakers are muted. When the voice
control system is being used (navigation TALK button pressed), all of the speakers are muted.
The internal GA-Net II bus passes information back and forth between the navigation display, the navigation unit, and
the audio system components. The information passed on this bus are touch button commands, audio muting signal,
audio (radio and XM), and any open in these bus lines can affect the navigation system or other audio accessory
operation.
The clock on the navigation display is set and maintained by the navigation unit. The time is automatically adjusted for
daylight savings, and time zone changes while driving. The time can be adjusted in setup.
Additional information is available about the navigation components following the System Diagram. A glossary of
terms that are used throughout this section follows the detailed information.
The Navigation System Manual in the glove box covers all of the system functions and settings. Use this as a resource
when evaluating a customer concern.
The Comm.Bus connects the HFL and the navigation unit.
If a POI phone number is available, the navigation unit sends the phone number (on the calcurate route to screen) to
the HandsFreeLink control unit for dialing.
(cont’d)
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•
Glossary
Item Definition
23-287
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 Diagnostic Trouble Codes. Use the 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 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
23-288Navigation 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 This occurs when the user leaves mapped roads. Off road tracking dots (bread-crumbs) are displayed If the
option is enables 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 the have not been verified.
Paired Linking your call phone to the HFL.
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 23-297).
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 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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Version
23-316 Navigation System
System Diagnostic Mode (cont’d)
Return
DownLoad
Program Flash x.xx.xxKA
Program Disc IPL x.xxx.xxx
APL
DBOOT x.x.xxx
System uCom x.xxx
Model SNRX Version
 ILL-Illumination Indication
(Connector A (24P) terminal No. 13)
a) OFF (0) when parking lights, or headlights are off
b) ON (1) when parking lights, or headlights are on
The navigation uses the signal to determine whether to
put the navigation screen into the Day or Night
brightness mode. (Setup screen 1) ILLCANCEL a) OFF (0) when the dash lights brightness control
button is less than 90 % brightness with the
headlights turned on.
b) ON (1) when the dash lights brightness control
button is more than 90 % brightness with the
headlights turned on. This screen displays the current version information for
the navigation system software. In addition, this screen
allows the loading of updated software if requested by
the factory, or instructed by a Service Bulletin. Software
may be loaded from a CD or a PC card.
 Program Flash: Displays the version of the navigation software in memory.
 Program Disc: If displayed, this value represents the version of the navi software on the navi DVD.
NOTE: The last two letters of the Program Flash or
DVD fields indicate which DVD is installed in the unit.
 IPL, APL, DBOOT, and System uCom, are all for factory use.
 Model: For this model, the field should begin with SNR
 Download: Do not touch, unless instructed by the factory.
Check any official Acura service website for more
service information about navigation DVDs.
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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
YES
NO
23-345
NOTE:
 Check the vehicle battery condition first.
 This is not the same condition as when driving off-road (or on a fire or logging road).
 This condition is caused by a loss of map matching from a bad sensor input. Check for aftermarket or
other objects that can block the GPS signal. Always
perform Map matching (see page 23-269) before
proceeding with the troubleshooting.
 Always check for and resolve all CAN DTCs before troubleshooting the navigation system.
 Verify that the correct navigation unit is installed for this model. Go into the Diagnostic mode, and use
Version (see page 23-316).
 Make sure that the correct DVD color and version are installed.
 Check for aftermarket metallic window tinting.
 Inspect the DVD for dirt or damage.
 Check any official Honda service website for more service information about the navigation system.
 Before troubleshooting, make sure you have anti- theft codes for the navigation system.
 After troubleshooting, enter the anti-theft codes for the navigation system.
 Check the DVD for damage or scratches.
 Check for connectors for poor connections or loose terminals.
1. Check the GPS icon on the navigation screen.
Do the troubleshooting for GPS icon is white
or not shown (see page 23-341).
Go to step 2.
2. Go into the Self-Diagnostic mode, and use the Yaw Rate diagnosis (see page 23- 314) to check the yaw
rate sensor.
Go to step 3.
Replace the navigation unit (see page 23-355). 3. Go into the Diagnostic mode, and use the Car
Status diagnosis (see page 23-315) to check the
vehicle speed pulse (VSP) and the BACK signals.
The problem may be a characteristic of the
system. Check to see if the problem occurs in the
same place in a known-good vehicle. If it does, the
problem could be in the database. Go to step 4.
 If the problem is the vehicle speed pulse, troubleshoot the vehicle speed signal circuit. BLU
wire for open or short. If OK, good ECM/PCM. If
the problem or symptom goes Update the ECM/
PCM (see page 11-227) if it does not have the
latest software or substitute a known-good ECM/
PCM (see page 11-228).
 If the BACK signal is indicated ON (I), when in any shift lever position other than reverse,
troubleshoot the back-up light switch circuit or
MICU (A/T).
4. Substitute a known-good navigation unit (see page 23-355), and check to see if the problem occurs in
thesameplace.
The problem is in the database and should
be considered a characteristic of the system.
Report the problem according to the Navigation
System Owner’s Manual under Reporting Errors
and look for improvements in future databases.
Replace the navigation unit (see page 23-355).
Is the GPS icon white or missing?
I s t he y aw r at e sensor OK ? Ar e t he v ehi cl e speed pul se and t he BACK si gnal s
OK ?
Does t he pr obl em occur i n t he same pl ace?
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