SymptomDiagnostic procedure Also check for
23-277
Voice guidance cannot be heard, is
broken up, or there is static
Symptom Troubleshooting
(see page 23-341) Volume or voice feedback setting
(see Owner’s manual)
Navigation unit
Stereo amplifier
Harness/fuses/switches
Voice control does not work/
respond Symptom Troubleshooting
(see page 23-342) Navigation unit
The wrong color DVD is installed
The DVD is damaged or dirty
Microphone harness/switches
HandsFreeLink control unit
Navigation cannot control HVAC by
voice command Symptom Troubleshooting
(see page 23-346) The wrong color DVD is installed
Harness/fuses/switches
Wrong navigation unit (model
code)
Navigation cannot control XM radio Symptom Troubleshooting (see page 23-350)Low or weak battery
Navigation cannot control audio
system Symptom Troubleshooting
(see page 23-349)Wrong color DVD
Navigation display buttons do not
work or respond properly Symptom Troubleshooting
(see page 23-340) Navigation unit
Open/short between the XM
receiver or the GA-Net bus
The wrong color DVD is installed
The DVD is damaged or dirty
Today’s Destinations button is dim
and not selectable in the Enter
destination by screen (grayed-out) The client has not entered a group
of locations for Today’s Destinations.
This is normal. The button is only
selectable if the client is using this
functionSee Owner’s Manual
Some set-up and information
functions of the navigation system
are grayed-out and do not work Client did not select OK from
Disclaimer screen. Refer to System
Function Diagram (see page 23-289)
Previous Destinations button is dim
and not selectable in the Enter
destination by screen (grayed-out) The vehicle may be new, or the
customer deleted the destination.
Enter a destination, and allow the
system to route to it. After the trip,
the Previous Destinations button
will be selectable
Address cannot be found or system
gives poor routing Verify proper operation and
system limitations using the
owner’s manual.
See Answering client question
Navigation coverage in general
troubleshooting
Refer to Database limitation in the
navigation system manual to
report database errorsDatabase limitations (address not
in database)
The wrong color DVD is installed
OPEN/CLOSE function of the display
does not work Symptom Troubleshooting
(see page 23-351) Navigation unit
Harness
Navigation display will not close Symptom Troubleshooting (see page 23-352) Navigation unit
Harness
Navigation display does not open or
opens part way Symptom Troubleshooting
(see page 23-352) Navigation unit
Harness
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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.
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Start-up procedure and Diagnostic Menu System Links
23-297
System Diagnostic Mode
Return System LinksHelp
Exit Diag
ReturnReturn
Navi.ECUSelect Diagnosis Items Self- Diagnosis Mode
Detail Information & Setting
(Navi will check internal function. connections, etc.
Perform this test with vehicle stopped and engine running.)
(Individual Diagnostic screens to confirma specific diagnostic screen.)
XM
Error
History
Yaw
Sensor Car Status
ECU Info. Hard Key
DVD Mic
HFL
Press any icon if you want to see details. GPS Ant. R. Camera
Display Radio
A/C
Start the vehicle, and at the disclaimer screen use the
navigation display hard buttons as described below:
Make sure the battery is in good condition, then press
and hold the three buttons MAP/GUIDE, MENU, and
CANCEL, for about 3 seconds. The display screen goes
directly to the Select Diagnosis Items menu shown
below.
Self-Diagnosis Mode (runs the automatic diagnosis of the navigation system)
Detail Information & Setting (allows you to manually diagnose the navigation system) 1. By selecting Self-Diagnosis Mode from the
navigation screen main menu. The message at the
bottom of the screen flashes indicating the
diagnostic is running. Make sure you enter the
audio anti-theft code.
NOTE: The system cannot complete a full diagnosis unless the engine is running.
DTC 2703 can be stored when the ignition switch is at ACCESSORY (I). With the ignition switch is
in ACCESSORY (I), the climate control unit is
turned off and the navigation unit loses
communication and stores DTCs. Therefore,
there is a possibility that the system is normal
even DTC 2703 is stored. Check system links with
the engine running, and if it shows normal, the
system is OK at this time.
2. Select the icon you want to diagnose. Push in the select the icon to see the details of that diagnostic
function.
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Factory diagnostic screen In Line DiagDetailed Information & Settings
23-301
In Line Diag
123
456
789
0 Return
Navi ECU
Display XXXXCorrect PIN
GPS Antenna
RR Camera RadioXM
HFL A/C
Exit Diag
Start Diag
BACK
Delete Done
KA
Select Diagnosis Items
Self- Diagnosis Mode
Detail Information & Setting
(Navi will check internal function. connections, etc.
Perform this test with vehicle stopped and engine running.)
(Individual Diagnostic screens to confirma specific diagnostic screen.)
NOTE: If the vehicle left the factory in the factory
diagnostic mode, or if the navigation unit is replaced
you will see this screen every time you turn on the
ignition.
When a navigation unit is powered up for the first time
at the factory or after replacement with a new or
remanufactured navigation unit, the factory diagnosis
screen (In Line Diag) appears. Normally the factory
does the steps necessary to verify proper operation and
terminate the factory diagnostic.
Until the proper confirmation sequence is done, the
screen appears every time the vehicle is started.
Follow the steps below to prevent the screen from
showingupinthefuture:
Press and hold the buttons (MENU, MAP/GUIDE, and CANCEL) for about 3 seconds. The Select Diagnosis
items screen appears.
Press and hold the MAP/GUIDE button for 5 10 seconds. A screen with a Complete button,
appears.
Press complete, then Return, and then shut the key off for 5 seconds. Do not disconnect the battery
during this period as the unit is saving the setting to
the SRAM memory. The In Line Diag should not
appear again.
Restart the vehicle, and confirm normal operation by completing the TQI of the Navigation System Service
Bulletin. These section allows you to run a specific diagnostic
and allows additional setting choices for some screens
that are not shown when selecting an icon from the
System Links screen.
When you select the menu item Detail Information &
Setting menu, the main diagnosis menu is displayed.
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YES
NO Diagnostic Test: Monitor Check
YES
NO
YES
NO
YES
NO
Picture has lines/rolls/other issues or is an
odd color
23-33923-339
NAVIGATION UNIT CONNECTOR A (24P) RADIO GND (BLK)
NAVIGATION UNIT CONNECTOR C (8P) GND (BLK)
9. Measure the voltage between navigation unitconnector A (24P) terminal No. 12 and body ground,
and between navigation unit connector C (8P)
terminal No. 4 and body ground.
Replace the navigation unit (see page 23-355).
Repair open in the wire between the
navigation unit and body ground (G 504) (see page
22-30), (G505) (see page 22-32). NOTE:
Check the vehicle battery condition frist.
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 the navigation screen settings for brightness, contrast, black level and the color screen for map
color and menu color.
Check the connectors for poor connections or loose terminals.
Before troubleshooting, make sure you have the navigation system anti-theft codes.
1. Check for electronic aftermarket accessories (possibly hidden) mounted near the navigation unit.
Disable the accessories, and recheck.
Go to step 2.
2. Turn the ignition switch to ON (II).
3. Start up the navigation picture.
Go to step 5.
Go to step 4.
4. Go into the Detail Information & Settings, select Monitor Check, and use RGB Color diagnostic
under Monitor Check (see page 23-302).
Go to step 5.
Replace the navigation unit (see page 23-355).
(cont’d)
Wire side of female terminals
Wire side of female terminals
Is t her e l ess t han 0.1 V ? Ar e t her e any el ect r oni c accessor i es?
Is the picture scrolling horizontally (lef t to right orright to left)?
Ar e t he r ed , gr een, and bl ue col or ed ci r cl esshow n?
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Navigation display stays on with ignition
switch in LOCK (0) Navigation cannot control audio system
YES
NO
YES
NO
YES
NO YES
NO
YES
NO
23-34923-349
NOTE:
Check the connectors for poor connections or loose terminals.
Before troubleshooting, get the navigation system anti-theft code, then write down the audio presets.
After troubleshooting, re-enter the anti-theft code, and re-initialize the navigation system, then enter the
audio presets.
Check for aftermarket accessories that use the same power circuit. A feedback can cause this problem.
1. Remove the key from the ignition.
Go to step 2.
The system is OK at this time.
2. The vehicle may have been used as a demonstration vehicle at an event like an auto
show. In these events, power is often jumpered to
the navigation system so that the ignition key is not
needed in the vehicle. At the end of the show, the
jumper wire may not have been removed. Check
the navigation unit connector A (24P) for a non-
factory jumper wire in series with the factory cable.
Remove the jumper wire, and re-test. Return
the jumper wire to Tech Line.
Go to step 3.
3. Check if the audio unit works.
Troubleshoot the ACC circuit for a short to
power with another circuit.
Replace the navigation unit (see page 23-355). NOTE:
Check the vehicle battery condition first.
Verify that the correct navigation unit is installed for this model. Go into the Diagnostic mode and use
Version (see page 23-316).
Check for connectors for poor connections loose terminals.
Before troubleshooting, make sure you have anti- theft codes for the navigation system.
After troubleshooting, enter the anti-theft codes for the navigation system.
Make sure that the correct navigation DVD color and version are installed.
Inspect the navigation DVD for dirt or damage.
Check any official Honda service website for more service information about the navigation system.
1. Make sure the anti-theft code for the navigation system is entered.
2. Go into the Diagnostic Menu, and use the Navi System Link test (see page 23-297).
Do the troubleshooting for the voice
guidance cannot be heard (see page 23-341).
Go to step 3.
3. Substitute a known-good navigation unit (see page 23-355), and recheck.
Replace the navigation unit (see page 23-355).
Do the audio system troubleshooting.
Does t he nav i gat i on scr een st ay on?
Is t her e a j umper w i r e?Does the audio unit work with the ignition switchoff? Is the Radio icon red?
Can t he nav i gat i on cont r ol aud i o?
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Pre-operation Check Set-up After Replacing Front Passenger’s Seat
Component(s)
24-28SRS
ODS Unit Operation Check
A
Check the ODS operation after any of these actions.
Replacement of front passenger’s seat component(s) (except ODS unit and/or weight sensors)
After a vehicle collision
SRS unit replacement
Make sure all the components of the front passenger’s seat are correctly installed.
Position the front passenger’s seat to the rearmost position.
Adjust the seat-back to the forwardmost position.
Do not move the seat from this position.
Make sure nothing is on or under the front passenger’s seat.
Make sure there is nothing in the front passenger’s seat-back pocket.
Keep the windows and moonroof closed.
Do all calibration procedures, except test-driving, in the service bay.
Make sure the vehicle is on level gr ound.
Turn the heater and the A/C off.
Do not touch the front passenger’s seat during the calibration, unless you are prompted to or until you
have completed the operation check.
Do not expose the front passenger’s seat to sudden temperature changes.
Make sure all aftermarket devices such as amplifiers, fluorescent lights, air purifies, CB or HAM radios, etc.
are turned off. 1. Make sure the ignition switch is in LOCK (0).
2. Connect the HDS to the data link connector (DLC)
(A).
3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the vehicle and the SRS unit. If it does not communicate,
troubleshoot the DLC circuit (see page 11-204).
5. Drive the vehicle, accelerate to 20 mph (36 km/h), then stop on level ground.
6. From the HDS Main Menu, select SRS, then Inspection. In the HDS Inspection Menu, select
SEAT OUTPUT CHK and follow the prompts until
the ODS unit operation check is complete.
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