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Symptom Diagnostic procedure Also check for
23-98
Navigation System
Symptom Troubleshooting Index
Navigation system stays on the
GPS initialization screen
Symptom Troubleshooting
(see page 23-92) Navigation unit
GPS antenna/cable is disconnected or
damaged
The wrong color DVD is installed
The DVD is damaged or dirty
Harness/fuses/switches
Vehicle position icon constantly
leaves road, moves erratically, or
is displayed very far from actual
vehicle position Symptom Troubleshooting
(see page 23-126)
Navigation unit
GPS antenna/cable
PCM (speed and fuel pulses)
Harness/fuses/switches
System always comes up in in-
line diagnostic mode Symptom Troubleshooting
(see page 23-127)
Navigation system will not accept
security code Symptom Troubleshooting
(see page 23-134)Wrong color DVD
Navigation frequently asks for
anti-theft code and/or needs GPS
initialization Symptom Troubleshooting
(see page 23-131)
Loss of voltage or poor ground (G504,
G505)
Navigation unit
Low battery voltage
Harness/fuses/switches
GPS icon is white or not shown Symptom Troubleshooting (see page 23-122) Navigation unit
Aftermarket accessories connected to
the system
The wrong color DVD is installed
The DVD is damaged or dirty
GPS antenna/cable
Harness/fuses/switches
Vehicle icon wanders across the
map when driving (does not
follow a displayed road) or map or
vehicle ICON spins Symptom Troubleshooting
(see page 23-126)
Navigation unit
GPS antenna/cable
ECM/PCM (speed signal)
No picture is displayed Symptom Tr oubleshooting
(see page 23-119) Navigation unit
The wrong color DVD is installed
The DVD is damaged or dirty
Harness/fuses/switches
Picture has lines/rolls/other issues
or is an odd color Symptom Troubleshooting
(see page 23-120) Navigation unit
The wrong color DVD is installed
The DVD is damaged or dirty
Aftermarket accessories connected to
the system
Harness/fuses/switches
Display day/night mode does not
work or does not work properly If you use the display mode
button, the auto day/night
function is disabled until you
turn the ignition switch to ON
(II)
Symptom Troubleshooting
(see page 23-128)Display brightness set to High in day
or night mode
Gauge control module
The wrong color DVD is installed
The DVD is damaged or dirty
Harness/fuses/switches
System locks up or freezes
constantly Symptom Troubleshooting
(see page 23-128) Navigation unit
The wrong color DVD is installed
The DVD is damaged or dirty
Harness/fuses/switches
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SymptomDiagnostic procedure Also check for
23-99
Voice guidance cannot be heard,
is broken up, or there is static
Symptom Troubleshooting
(see page 23-122) Volume or voice feedback setting (see
Owner’s manual)
Navigation unit
Harness/fuses/switches
Voice control does not work/
respond Symptom Troubleshooting
(see page 23-123) Navigation unit
The wrong color DVD is installed
The DVD is damaged or dirty
Microphone harness/switches
Navigation cannot control HVAC
by voice command Symptom Troubleshooting
(see page 23-130) Wrong color DVD is installed
Harness/fuses/switches
Wrong navigation unit (model code)
Navigation cannot control XM
radio Symptom Troubleshooting
(see page 23-130)Low or weak battery
Navigation cannot control audio
system Symptom Troubleshooting
(see page 23-129)Wrong color DVD
Navigation display buttons do not
work or respond properly Symptom Troubleshooting
(see page 23-121) 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 23-111)
Previous Destinations button is
dim and not selectable in the
Enter destination by screen
(grayed-out) The vehicle may be new, or the
client 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 customer
question Navigation coverage
in general troubleshooting
Refer to Database limitation in
the navigation system manual
to report database errorsDatabase limitations (address not in
database)
Wrong color DVD installed
OPEN/CLOSE function of the
display does not work Symptom Troubleshooting
(see page 23-132) Navigation unit
Harness
Navigation display will not close Symptom Troubleshooting (see page 23-133) Navigation unit
Harness
Navigation display does not open
or opens part way Symptom Troubleshooting
(see page 23-133) Navigation unit
Harness
PC card will not play/card icon on
audio screen cannot be selected Symptom Troubleshooting
(see page 23-67)Navigation unit
(cont’d)
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SymptomDiagnostic procedure Also check for
23-100Navigation System
Symptom Troubleshooting Index (cont’d)
Navigation display stays on with
ignition switch in LOCK (0)
Symptom Troubleshooting
(see page 23-129) Harness/fuses/switches
Aftermarket accessory connected to
the system
DVD read error messages Symptom Troubleshooting (see page 23-127) Navigation unit
Wrong color DVD installed
Damaged DVD
Navigation system will not go
beyond the disclaimer screen and
displays the OK button See navigation display buttons do
not work or respond properly
Wrong color DVD installed
Scratched or damaged DVD
Navigation unit
The navigation anti-theft code
card is lost or missing See anti-theft feature (see page
23-90)
The vehicle icon lags behind
when the vehicle turns See self-inertial navigation
limitations (see page 23-90) Aftermarket accessories connected to
the system
GPS antenna/cable
Navigation screen is darker than
normal or takes time to brighten
when it is cold See LCD display unit limitations
(see page 23-91)
The navigation clock is off by 1 to
3 hours after replacing the
navigation unit See service precautions (see page
23-92)
Perform map matching (see page
23-94)
GPS antenna/cable
Check and adjust the clock settings
A new navigation DVD is needed See obtaining a navigation DVD (see page 23-94)
Time is not correct Reset Time Adjustment in set-up The wrong colored DVD or version is installed
The DVD is scratched or dirty See ‘‘DVD Handling and Cleaning’’ (see page 23-95)Navigation unit
The wrong DVD was installed and
now the system does not function
properly See Precaution customer Sneak
Previews (see page 23-97)
Install the correct version DVD
Check any official Honda service
website for more service information
about the navigation system
A specific city cannot be found See How to answer client questions about navigation
coverage (see page 23-97) The DVD is scratched or dirty
Refer to Database limitation in the
navigation system manual to report
database errors
The Honda Globe Screen (not the
Acura Globe Screen) appears
every time the vehicle is started Symptom Troubleshooting
(see page 23-135)
Also see the symptom The wrong DVD
was installed and now the system does
not function properly
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Navigation Unit Inputs and Outputs for Connector A (17P)
Navigation Unit Connector A (17P) TerminalNumber Wire Color Terminal Name Description Voltage (about) Symptom
23-113
1 RED ILL ( )
Ground for
illumination light With full dash
lights brightness,
0VIf open: When brightness = Auto, night mode for the
display is inoperative when lights on.
If short to ground: No change to display.
9 BLK RADIO GND (Ground)Ground for display
unit 0 V
If open: No change to display.
If short to ground: No change to display.
10 GRY ILL ( ) (Illumination
positive)Parking light on
signal from dash
and console lights Light on =
battery voltage,
Lights off = 0 VIf open: When brightness = Auto, night mode for the
display is inoperative when lights on.
If short to ground: Blows fuse No. 14 (7.5 A) in
under-dash fuse/relay box.
13 BLU VSP (Vehicle speed
pulse)Vehicle speed
pulse signal from
ECM/PCM Pulses 0 5 V:
Average 2.5 V,
when movingIf open: No vehicle speed pulses.
Diagnostic screen Car Status, VSP Navi = 0.
If short to ground: No vehicle speed pulses.
Diagnostic screen Car Status, VSP Navi = 0.
17 WHT B ( B power
source)Continuous power
source
Battery voltage If open: Screen completely off (no backlight visible).
If short to ground: Blows fuse No. 23 (10 A) in the
under-hood fuse/relay box.
(cont’d)
Wire side of female terminals
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Navigation Unit Inputs and Outputs for Connector C (12P)
Navigation Unit Connector C (12P)TerminalNumber Wire Color Terminal Name Description Voltage (about) Symptom
23-114Navigation System
System Description (cont’d)
1 WHT B BACK UP Continuous power
sourceBattery voltage If open: Display picture goes out (display back light
still on). NOTE: System will reboot to enter code
screen.
If short to ground: Blows fuse No. 23 (10 A) in the
under-dash fuse/relay box.
4 BLK GND Ground for navigation unit0 V If open: No effect on system.
If short to ground: No effect on system.
7 BRN BACK LT Reverse signal of select laver from
Multiplex
integrated Control
unit (A/T) or
backup light switch
(M/T)In reverse,
battery voltage:
Otherwise0V
If open: Navigation never sees the reverse signal
and back-up camera does not come on when in
reverse. Diagnostic screen Car Status, Back = 0.
If short to ground: Blows fuse No. 10 (7.5 A) in the
under-dash fuse/relay box.
Wire side of female terminals
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23-118 Navigation System
Circuit Diagram
AC CK AC SO AC SI
BLU
BACK-UP LIGHT SWITCH (MT)
K-LINE
MICU
A14
PUR
Q14 Q4
GRNA4 A6
LT BLU
Q8 Q1
WHT
UNDER-DASH FUSE/RELAY BOX
ORN
BRN10
BRN
3 CABLE REEL
B6 D5 ORN 3
A29
2 1
D4 CABLE REEL GRN
RED/BLK
BACKTALK
5
GRY
GRY*
D3 BRN
D1
D2
YEL
GPS
H1
H2 G504
GND
C4
BLK
VSP
BLU
A13
ILL
ILL
F2 F4
RED YEL F3A1
A10
GRY
RED A17
C1 C7
BRN NAVIGATION UNIT
VOICE CONTROL SWITCH
8
GRN 680
10 k
2.2 k
ECM/PCM
(VEHICLE
SPEED SIGNAL)
GPS SH
GND GPS
ANTENNA
MIC SH
GND MIC
GND
MIC
SIG
NA VI
GUIDE
No. 23 (10 A)
FUSE (In the
under-hood
fuse/relay box)
MIC
ADPT
DASH LIGHTS
BRIGHTNESS
CONTROLLER
No. 14 (7.5 A) FUSE
(In the under-dash
fuse/relay box)
No.14(7.5A)FUSE
(In the under-dash
fuse/relay box)
DASH LIGHTS
BRIGHTNESS
CONTROLLER
B
BACK UP BACK
LT
No. 35
(7.5 A)
FUSE B
RADIO
SCTY
RADIO
ACC
RADIO
AUDIO
REMOTE
GND
MULTIPLEX INTEGRATED
CONTROL UNIT (MICU) (AT)
CLIMATE
CONTROL
UNIT G505
RADIO
GND
A9
BLK VSP
GPS
MIC
GND MIC
SIG
MIC
ADPT
E3
BLU
PNK
E9
BUS SH
GND
XM RECEIVER BRN*
BRN*E10
A9
A10
A3
(’08 model) BUS
(GA-NET)
BUS
(GA-NET)
AUDIO
REMOTE
SWITCHBRN
1
2
5
MICROPHONE *1:
: Shielding
This shielded wires have a heat-shrunk tube
insulating the outside of the wire. The color
of the insulating tube, typically black or dark gray,
may not match the color of the wire listed on the
schematic.
G2
BUS SH
GND BUS
(GA-NET)
BUS
(GA-NET) WHT WHT
4
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No picture is displayed
YES
NO
YES
NO YES
NO
YES
NO
23-119
Symptom Troubleshooting
NAVIGATION UNIT CONNECTOR A (17P)
BBACKUP(WHT)
NAVIGATION UNIT CONNECTOR A (17P) ACC RADIO (PUR)
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 the connectors for poor connections or loose terminals.
Before troubleshooting, make sure you have the navigation system anti-theft code.
1. Check the No. 23 (10 A) fuse in the under-hood fuse/relay box and No. 35 (7.5 A) fuse in the under-
dash fuse/relay box, and reinstall the fuse if it is OK.
Go to step 2.
Replace the fuse and recheck.
2. Turn the ignition switch to ON (II).
3. Operate the radio and listen to the audio.
Go to step 4.
Refer to audio system troubleshooting.
4. Turn the ignition switch to LOCK (0).
5. Remove the navigation unit (see page 23-155). 6. Measure the voltage between navigation unit
connector A (17P) terminal No. 17 and body ground.
Go to step 7.
Repair open in the wire between the under-
dash fuse/relay box and the navigation unit.
7. Turn the ignition switch to ON (II).
8. Measure the voltage between navigation unit connector A (17P) terminal No. 14 and body ground.
Go to step 9.
Repair open in the wire between the under-
dash fuse/relay box and the navigation unit.
(cont’d)
Wire side of female terminals
Wire side of female terminals
IsthefuseOK? Can y ou hear t he aud i o? Is there battery voltage?
Is there battery voltage?
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Display day/night mode does not work or
does not work properly System locks up or freezes constantly
YES
NO
YES
NO YES
NO
23-12823-128Navigation System
Symptom Troubleshooting (cont’d)
NOTE:
Check the vehicle battery condition first.
Check the connectors for poor connection or loose terminals.
Before troubleshooting, get the navigation system anti-theft code.
After troubleshooting, enter the navigation system anti-theft code.
Full brightness on the instrument panel brightness control with the head lights turned on causes the
system to stay in the day mode, even when the lights
are on.
1. Make sure the instrument panel brightness control is not on full brightness. Turn the headlights on and
adjust the dash brightness to the middle range.
2. Change the day/night mode under Set-up to AUTO, and recheck.
The system is OK at this time.
Go to step 3.
3. Go into the Diagnostic Menu and use the Car Status test to check for an ILL signal (see page 23-141).
Replace the navigation unit (see page 23-155).
Check the ILL circuit between the
navigation unit and the No. 14 (7.5 A) fuse in the
under-dash fuse/relay box. 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.
1. Start the engine and turn the ignition switch to LOCK (0), then turn the ignition switch to ON (II).
The system is OK at this time.
Check the DVD for scratches or damage, and
the navigation unit for water damage. If OK, go into
the Diagnostic Menu and do all of the Unit Check
tests (see page 23-139). Also check for low battery
charge or poor charging system performance.
Does t he d i spl ay change t o d ay and ni ght mod es w hen t ur ni ng t he head l i ght s on and of f ?
I s t he I LL si gnal OK ? Does the system reboot?
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