Audio GlossaryItem Definition
23-168Audio System
System Description (cont’d)
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, or
components, components or the entire audio and navigation system may
appear inoperative.
GB (Gigabyte) A unit of memory or disk storage equal to billion bytes (1000 million bytes).
HDD Abbreviation for hard disc drive. They are sensitive to heat and it is not
recommended that they be used in the PC card slot for playing audio files.
Hertz (Hz) The unit of frequency equal to one cycle per second (cps). One kilohertz (kHz)
equals 1,000 cps; one megahertz (MHz) equals 1 million cps.
Integrated amplifier A component that combines a pre amp and a power amp into a single unit. A
receiver combines an integrated amp and a tuner into a single unit.
Jewel case The hard plastic case that contains a compact disc or DVD. Always use a jewel
case to prevent scratches on the underside of a CD or DVD.
LCD (Liquid Crystal Display) A type of digital display that changes reflectance or transmittance when an electrical field is applied to it.
Memory Circuitry or devices that hold information in electrical or magnetic form, such
as the AM/FM radio presets.
MB (Megabyte) One million bytes. Written as 1 MB. Megabytes are used as a measure of digital
storage space. For example, a CD can hold 650 MB.
Mic An abbreviation for microphone. For vehicles with navigation, the microphone
accepts navigation voice commands to control audio and navigation functions.
MP3 music files MP3 is an audio coding format. MP3 is a popular audio compression format on
the Internet and computers. CDs and PC Cards with these files can be played on
some vehicle’s audio system.
Mute When the navigation gives guidance, the front speakers are muted (no music).
When you use the voice control system, all of the speakers are muted.
Noise Unwanted random sounds like buzzing, hiss, pops, static, whine, etc.
PC card The slot used for playing MP3 and WMA music files. The PC Card is usually a
combination of a small flash card in a PCMCIA adaptor that slides into the slot.
The ATA, SD, and compact flash types of cards have been tested up to 1 GB.
PCMCIA A computer standard for the slot that the PC card slides into. Another term for
the PC card slot.
Processor The part of an audio device that performs tasks/calculations. In the audio unit
the processor handles muting to allow the navi to speak voice commands, and
the decoding/playback of the sound files etc.
Radio A head unit that combines a tuner, a preamplifier, and often a power-amplifier.
Route guidance (RG) Spoken voice used for turn-by-turn navigation from the audio speakers.
SCF (Cold Start Fix) screens These screens are displayed if the system requires a GPS initialization. The vehicle should be moved outside into an open area away from buildings/power
lines.
Stereo A recording of at least two channels where you can hear sound or music from
the left or right side.
SD (Secure Digital) card This compact type of memory card allows for fast data transfer and has built-in security functions. SD cards have a small write-protection switch on the side.
Shield A metallic foil or braided wire layer surr ounding conductors which are
designed to prevent electrostatic or electromagnetic interference (noise) from
external sources such as buzzing, or popping sounds heard on the speakers.
Speaker (Loudspeaker) A device that converts electrical energy into acoustical energy (sound).
Speed-sensitive volume
compensation (SVC) The SVC increases the audio volume to compensate for increased interior noise
when the vehicle drivers at freeway speeds.
Subwoofer A loudspeaker made to reproduce the lowest audio frequencies, about 25 Hz to
125 Hz.
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NAVIGATION UNIT CONNECTOR E (14P)
Cavity Wire Color Connect to NAVIGATION UNIT CONNECTOR G (3P)
Cavity Wire Color Connect to
23-173
E1 BLU XM receiver, USB adapter unit
(B)
E2 LT BLU XM receiver, USB adapter unit (SYS ACC)
E3 BRN Shield for terminals No. 9 and No. 10 (GA-NET BUS SH)
E4 GRY Shield for terminals No. 5, No. 6, No. 13, and No. 14
(SAT SH GND)
E5 WHT XM receiver, USB adapter unit (AUDIO R )
E6 RED XM receiver, USB adapter unit (AUDIO L )
E9 BLU XM receiver, USB adapter unit (GA-NET BUS )
E10 PNK XM receiver, USB adapter unit (GA-NET BUS )
E11 BLK XM receiver, USB adapter unit (GA-NET GND)
E13 BLK XM receiver, USB adapter unit (AUDIO R )
E14 GRN XM receiver, USB adapter unit (AUDIO L )
: The shielded wires have a heat-shrink 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. G1 AM/FM/XM antenna (RF IN)
G2 Shield for terminal No. 1
(RF SH)
G3 AM/FM/XM antenna (ANT B)
(cont’d)
Wire side of female terminals Terminal side of female terminals
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XM RECEIVER CONNECTOR A (14P)
Cavity Wire Color Connect to XM RECEIVER CONNECTOR B (2P)
Cavity Wire Color Connect to
23-180Audio System
System Description (cont’d)
A1 BLU Navigation unit, USB adapter
unit ( B)
A2 LT BLU Navigation unit, USB adapter unit (SYS ACC)
A3 BRN Shield for terminals No. 9 and No. 10 (GA-NET SH GND)
A5 WHT Navigation unit, USB adapter unit (SAT R )
A6 RED Navigation unit, USB adapter unit (SAT L )
A9 BLU Navigation unit, USB adapter unit (GA-NET BUS )
A10 PNK Navigation unit, USB adapter unit (GA-NET BUS )
A11 BLK Navigation unit, USB adapter unit (GND)
A13 BLK Navigation unit, USB adapter unit (SAT R )
A14 GRN Navigation unit, USB adapter unit (SAT L )
: 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. B1 Satellite signal antenna (SAT/
TER)
B2 Shield for terminal No. 1 (GND SH)
Wire side of female terminals Terminal side of female terminals
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23-187
*: 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.
:GA-NET
: Shielding
SAT/TER B1
B2 XM ANTENNA LEAD
XM ANTENNA
A
C D
E B
A10A9
PNK BLU
BRN*
A3 GA-NET
BUS
GA-NET
BUS
GA-NET
BUS SH
A13
A5
A14
A6
XM RECEIVER
RED
GRN WHT BLK E10
E9
PNK BLU
BRN*
E3 GA-NET
BUS
GA-NET
BUS
GA-NET
BUS SH A10 A9
A3
BRN*
PNK BLUGA-NET
BUS SH
GA-NET
BUS
GA-NET
BUS USB ADAPTER UNIT
NAVIGATION UNIT A2
A1 A11
GND BLK
LT BLU
ACC
B NAVIGATION UNIT
12
AUDIO
L AUDIO
LAUDIO
RAUDIO
R BRN*
GND SH
3
45
BLU
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XM radio preset memory is lost (with
navigation)
YES
NO
YES
NO YES
NO
YES
NO
23-248Audio System
Symptom Troubleshooting (cont’d)
XM RECEIVER CONNECTOR A (14P)
B(BLU)
XM RECEIVER CONNECTOR A (14P) GND (BLK)NOTE: Check the vehicle battery condition first.
Check the connectors for poor connections or loose terminals.
If you can only tune to channel 000, 001, 174, and 247, make sure the navigation unit is set to channel mode
(see owner’s manual), if it is set to channel mode, call
XM Satellite Radio customer support, and check the
account activation status.
1. Turn the ignition switch to ON (II).
2. Turn on the navigation unit, and set each of the XM radio channel preset buttons.
Go to step 3.
Go to step 7.
3. Turn the ignition switch to LOCK (0) for 1 minute, then turn it back to ON (II).
4. Test all of the XM radio channel preset buttons for proper recall operation.
System is normal at this time. Check
connections at the navigation unit.
Go to step 5.
5. Turn the ignition switch to LOCK (0).
6. Disconnect XM receiver connector A (14P). 7. Measure the voltage between XM receiver
connector A (14P) terminal No. 1 and body ground.
Go to step 8.
Repair open in the wire between the
navigation unit and the XM receiver.
8. Reconnect XM receiver connector A (14P).
9. Measure the voltage between XM receiver connector A (14P) terminal No. 11 and body ground.
Substitute a known-good navigation unit
(see page 23-355), and recheck. If the symptom/
indication goes away, replace the navigation unit
(see page 23-355).
Repair open in the wire between the XM
receiver connector and the navigation unit.
Wire side of female terminals
Wire side of female terminals
Do each of t he X M r ad i o channel pr eset but t ons set pr oper l y ?
Do t he pr eset but t ons r ecal l t he r ad i o st at i ons? Is there battery voltage?
Is t her e l ess t han 0.1 V ?
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Poor or no sound with XM radio (Audio unit
does display XM channels) (with navigation)
YES
NO XM receiver connector Wire color
YES
NO
23-249
XM RECEIVER CONNECTOR A (14P)
NOTE: Check the vehicle battery condition first.
Check the XM radio reception in an open area. Poor reception/interference can be caused by nearby tall
buildings, mountains, or high-voltage power lines.
Check the connectors for poor connections or loose terminals.
If you can only tune to channel 000, 001, 174, and 247, make sure the navigation unit is set to channel mode
(see owner’s manual), if it is set to channel mode, call
XM Satellite Radio customer support, and check the
account activation status.
1. Turn the ignition switch to ON (II).
2. Turn on the navigation unit and select XM radio.
3. Check for an error message on the display.
Go to error code list (see page 23-194).
Go to step 4.
4. Turn the ignition switch to LOCK (0).
5. Disconnect navigation unit connector E (14P), USB adapter unit connector A (14P), and XM receiver
connector A (14P). 6. Check for continuity between XM receiver
connector A (14P) and body ground according to
the table.
A5 WHT
A6 RED
A13 BLK
A14 GRN
Short to body ground in the wire(s) between
the navigation unit and the XM receiver. Replace
the affected shielded harness.
Go to step 7.
(cont’d)
Wire side of female terminals
Ar e t her e any messages d i spl ay ed ? Is there continuity?
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General Operation
Anti-theft Feature
Symptom Diagnosis
Self-Inertial Navigation LimitationsGlobal Positioning System (GPS) Limitations
23-266Navigation System
General Troubleshooting Information
Refer to the navigation system manual for the
navigation system operating procedures.
The navigation system and audio unit have a coded
theft protection circuit. Make sure you have the anti-
theft security code before:
Disconnecting the battery.
Disconnecting the navigation unit connector A (24P) and C (8P).
Removing the No. 23 (10 A) fuse from the under-hood fuse/relay box.
After service, reconnect power to the navigation unit,
and turn the ignition switch to ON (II). Enter the 4-digit
anti-theft security code, then select Done.
If the code cannot be found, use the interactive Network
(iN) to look it up. You can view the serial number in one
of the ECU Info diagnostic screens (see page 23-305).
Alternatively, you can find the serial number on the
underside label which is located on the navigation unit
in the trunk.
When replacing the navigation unit, be sure to give the
customer the new anti-theft security code.
Certain circumstances and system limitations will result
in occasional vehicle positioning errors. Some client’s
may think this indicates a problem with the navigation
system when, in fact, the system is normal. Keep the
following items in mind when interviewing client’s
about symptoms of the navigation system.
The limitations of the self-inertial portion of the
navigation system (the yaw rate sensor and the vehicle
speed signal) can cause discrepancies between the
vehicle’s actual position and the indicated vehicle’s
position (GPS vehicle position). The following circumstances may cause vehicle
positioning errors:
Moving the vehicle with the engine stopped and the vehicle stopped, such as by ferry or tow truck, or if
the vehicle is spun on a turn table.
Tire slippage, changes in tire rolling diameters, and some driving situations may cause discrepancies in
travel distances. Examples of this include:
– Continuous tire slippage on a slippery surface
– Driving with snow chains mounted
– Abnormal tire pressure
– Incorrect tire size
– Frequent lane changes across a wide highway
– Continuous driving on a straight or gently curving highway
– Very bumpy roads
Tolerances in the system and map inaccuracies sometimes limit how precisely the vehicle’s position
is indicated. Examples of this include:
– Driving on roads not shown on the map (map matching is not possible)
– Driving on a road that winds in one direction, such as a loop bridge, an interchange, or a spiral parking
garage
– Driving on a road with a series of sharp hair-pin turns
– Driving near a gradual highway exit or transition
– Driving on one of two close parallel roads
– Making many 90 degree turns
The GPS cannot detect the vehicle’s position or
elevation during the following instances: For the first 5 to 10 minutes after reconnecting the battery (this process can take as long as 45 minutes).
When the satellite signals are blocked by tall buildings, mountains, tunnels, large trees, inside
parking structures or large trucks.
When the GPS antenna is blocked by metallic window tinting or by an object placed above it in the
vehicle. The GPS antenna requires a clear
unobstructed view of the sky.
When there is no satellite signal output (signal output is sometimes stopped for sate llite servicing).
When the satellite signals are blocked by the operation of some electronic aftermarket accessories
including, but not limited to non-OEM in-dash
entertainment units (radio, CD players/changers,
radar detectors and theft recovery systems) and cell
phones placed near the navigation system.
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Muting Logic
LCD Unit LimitationsSymptom Duplication
23-267
The accuracy of the GPS is reduced during these
instances:
Metallic window tinting above the GPS antenna.
When only three or less satellite signals are received (Four satellite signals are required for accurate
positioning).
When driving near high tension power lines.
When the satellite control centers are experiencing problems.
Whenever the navigation system is giving guidance,
the front speakers are muted. When the voice control
system is being used, all of the speakers are muted. If
the HandsFreeLink is in use, the voice control system is
unavailable and a message appears onscreen.
NOTE: The screen is not touch sensitive. Use the
interface dial and buttons to select items on the screen. In cold temperatures, the display may stay dark for the first 2 or 3 minutes until it warms up.
When the display is too hot because of direct summer sunlight, it will remain dark until the temperature
drops (you may see an error message displayed
stating this fact).
When the humidity is high and the interior temperature is low, the display may appear cloudy.
The display will clear up after some use.
Fingerprints on the screen may be noticeable. Clean the screen with a soft, damp cloth. You may use a
mild cleaner intended for eye glasses or computer
screens. To avoid scratching the panel, do not rub too
hard or use abrasive cleaners or shop towels. When the symptom can be duplicated, verify that it is
not a characteristic of the system. Review the
navigation system manual and compare it to a
known-good vehicle (with the same software and
database), under the same conditions. If the
symptom is not the same as the known-good vehicle,
follow the self-diagnostic procedures and the
appropriate troubleshooting procedures.
When the symptom does not reappear or only reappears intermittently, ask the client about the
conditions when the symptom occurred.
– Always ask the client to demonstrate the problem.
– Trytoestablishpossibleusererrorora misunderstanding of the system.
– Try to establish if outside interference may have been the cause.
– Try to duplicate the symptom under the same conditions the client experienced.
– Vibration, temperature extremes, and moisture (dew, humidity) are factors that are difficult to
duplicate.
– Inspect the vehicle for after-market electronic devices (vehicle locators, amps, radar detectors,
etc.) that may be hidden.
When troubleshooting navigation system problems,
ensure that the known-good vehicle is the same
software version year and model as the vehicle being
serviced. Mixing incompatible navigation DVDs or
other system components can delay the
troubleshooting process by creating symptoms or
issues causing effects unrelated to the original problem.
(cont’d)
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