´
µ
Û
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)Position Resistance
23-8623-86
Audio System
Audio Remote Switch Test
Audio Remote Switch Replacement
A
B
1. Remove the driver’s airbag assembly (see page
24-188).
2. Remove the 20P connector (A) from the cable reel (B).
3. Measure the resistance between terminals No. 9 andNo.10ineachswitchpositionaccordingtothe
table.
No buttonpressed About 10 k
MODE About 3.7 k
CH ( ) About 1.7 k
CH ( ) About 775
(VOL.UP) About 357
(VOL.DOWN) About 100
4. If the resistance is not as specified, replace the audio remote switch (see page 23-86). 1. Remove the steering wheel (see page 17-6).
2. Remove the audio remote switch (see page 17-7).
3. Install the audio remote switch in the reverse order
of removal.
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Overview
23-101
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 client concern.
(cont’d)
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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 Unit Inputs and Outputs for Connector D (5P)
Navigation Unit Connector D (5P) TerminalNumber Wire Color Terminal Name Description Voltage (about) Symptom
23-115
1 BRN MIC GND Ground for
microphone signal0 V If open: No microphone signal shown in
diagnostics: Navi System Link and Functional Set
up Mic Level.
If short to ground: No effect on voice recognition.
2 YEL MIC SIG Microphone output signal positive45V(with
navigation TALK
button pressed)If open: No microphone signal shown in diagnostic
screens: Navi System Link and Functional Setup
Mic Level.
If short to ground: No microphone signal shown in
diagnostic screens: Navi System Link and
Functional Setup Mic Level.
3 GRY MIC SH Shield for terminal No.1,2,50 V If open: No effect on voice recognition.
If short to ground: No effect on voice recognition.
4 GRN NAVI GUIDE Steering wheel switch output45V
(navigation TALK
button pressed)
2.5 3 V
(navigation
BACK button
pressed)If open: Steering wheel navigation TALK, and
navigation BACK buttons do not work.
If short to ground: Steering wheel navigation TALK,
and navigation BACK buttons do not work.
5 ORN MIC ADPT Control signal for microphone0 V If open: No effect on voice recognition.
If short to ground: No effect on voice recognition.
: The 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.
(cont’d)
Wire side of female terminals
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Navi System Link
23-136Navigation System
System Diagnostic Mode (cont’d)
Navi System Link
Navi.ECUReturn
Exit Diag
Detecting..
GPS Ant.
Display Radio BACK
Air-Con
This diagnostic step tests the cables connecting the
navigation components. Ensure that the ignition
switch is in the ON (II) position. When the diagnosis
begins, you hear a bong sound. The system is in a
Detecting mode, and is waiting for all the items in
white to be tested. This includes the voice control
switch (navigation TALK/BACK buttons), and the
microphone. Press the navigation TALK button on the
steering wheel, and in a normal voice, say ‘‘testing’’.
The Talk indicator on the screen should turn green,
and the voice level indicator should move to at least
the 6th bar to pass. Next, press the navigation BACK
button. The Cancel indicator should turn green.
If all of the communication lines connecting the system components, and the navigation TALK/BACK
buttons/microphone check out OK (all block diagram
items green), then the OK indicator turns green.
If there is a problem with the system, the faulty system component item turns red, and the screen
shows NG in red. Use the troubleshooting index, and
other diagnostic screens to help locate the problem.
The indicator on the screen may not change until you cycle the ignition switch. After repairing the affected
cable or system, repeat this diagnostic.
NOTE: Green boxes and green OK indicate that the
communications lines (cables) are intact. This
diagnostic does not necessarily imply that the
individual components are functioning properly. For
instance, the GPS antenna wire may be crushed, but
still show as green. A road test, or other diagnostic
maybenecessarytofindtheproblem. Select Return to return to the Diagnostic Menu, or the
Exit Diag button to exit.
NOTE: The Mic Level indicator must reach the 6th bar
or greater to pass the test.
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GPS Send Time
Demo Mode
Mic Level
23-148Navigation System
System Diagnostic Mode (cont’d)
Send GPS TimeReturn
GPS Time
Second
Year
Day Hour
Minute
xxxx.xx.xx xx:xx:xx
Set
xxxx
xx
Month xx
xx
xx
xx
Demo Mode
OFF
Demo
Speed Rate 150 ms ON OFFReturn
Return
Steering Switch Mic Level
Mic Level
BACK
This screen is for factory use only. It allows adjustment
of the GPS time. This display updates in real time.
GPS Time is the time as received from the GPS satellites. It is in Greenwich Mean Time (GMT).
Date, Hour, Minute, and Set should not be used.
This screen allows the navigation system to drive a
route, when the vehicle is stationary. Typical
applications include auto shows, and other events.
This feature allows a visitor to enter a destination, and
see the system drive to the destination. No speed signal
is needed. To initiate the mode, select ON.
Changing the speed rate in ms (millisec onds) is
optional, and represents the time between updates of
the VP (vehicle position) movement.
– When you increase the rate, the VP slows down because it is updated (moved) at a slower rate.
– When you decrease the rate, VP is faster because it is updated (moved) more frequently.
– 1500 ms is VP at its slowest in demo mode.
– 150 ms is VP at its fastest in demo mode (Default).
At key off, the setting automatically returns to the default of Off. This diagnostic screen allows you to independently test
the microphone and the navigation TALK and BACK
buttons. They are used to activate the voice control
system. The microphone is located near the map light
in the ceiling. It is directional, and works best if the
voice is coming from the drivers seat.
Press the navigation TALK button on the steering wheel, wait unit you hear a beep, and in a normal
voice say ‘‘testing’’. The TALK indicator on the screen
should momentarily turn green, and the text ‘‘Now
Recording...’’ should appear in yellow. If the talk
indicator on the screen does not briefly turn green,
then check the wiring from the navigation TALK
button to the navigation unit.
If there is no Mic Level movement when you speak, then you should check the wire running from the
microphone to the navigation unit.
If the mic level bar is full or almost full wit hout you
speaking or other back ground noise, replace the
microphone and recheck.
PressthenavigationBACKbuttononthesteering wheel. The Cancel indicator on the screen should
momentarily turn green. If it does not briefly turn
green, then check the wiring from the steering wheel
navigation BACK button to the navigation unit.
NOTE: The mic level should reach the 6th bar.
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23-15723-157
Voice Control Switch Replacement Microphone Replacement
B E
D
A C
B
A
A B
SRS components are located in this area. Review the
SRS component location (see page 24-11).
Also review the precautions and procedures (see page
24-13) in the SRS section before doing repairs or
service.
1. Remove the steering wheel (see page 17-6).
2. Remove the voice control switch (see page 17-7).
3. Install the audio remote switch in the reverse order of removal. 1. Remove the front individual map light lens (A).
2. Remove the bolts (B), then disconnect the
connectors, and remove the map lights housing (C).
3. Carefully pry off the moonroof switch (D) from the map light housing while pressing in on the
retaining tabs (E).
4. From the moonroof switch (A), remove the screw and microphone (B).
5. Install the microphone in the reverse order of removal.
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Overview
Speed-sensitive volume compensation (SVC)
23-164Audio System
System Description
The audio unit acts as the processor for all audio functions. Select audio functions from the audio unit, the audio
remote (on the steering wheel), or by using the navigation voice control system. The audio display provides the
current audio status. For vehicles with navigation, additional audio information is available by touching the audio
button on the navigation audio screen (See the owner’s manual and the navigation system manual for more details.).
The XM receiver passes its signal to the audio unit. In addition, it communicates with the audio unit via the GA-Net bus.
Any open connections in the GA-Net bus circuit causes audio and navigation functions to appear inoperative.
For vehicles with navigation, pressing the open/close switch on the navigation display panel allows access to the CD
slot and PC card.
A security signal is daisy-chained between the audio and vehicle components for integration into the vehicle’s security
system.
Some audio systems are equipped with speed-sensitive volume compensation (SVC). The navigation or audio unit
receives the vehicle speed pulse (VSP) from the ECM/PCM. The system processes the speed input and increases the
navigation or audio system volume level as the vehicle speed increases to compensate for the various interior noises
that occur at higher speeds. When the vehicle slows down, the volume returns to its normal level. The SVC has four
settings: SVC OFF, LOW, MID and HIGH that can be adjusted using the navigation or audio unit. The SVC comes from
the factory with the MID setting as the default.
To change the audio unit SVC setting, press the tune folder sound knob repeatedly until the SVC is displayed, rotate
the knob to adjust the SVC to the desired setting (SVC OFF, LOW, MID, or HIGH).
To change the navigation unit SVC setting, press the AUDIO button, and then select the SOUND icon on the navigation
display. Press the navigation display to select the desired setting (OFF, LOW, MID, HI).
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