navigation system NISSAN TEANA 2008 Service Manual

AV-620
< ECU DIAGNOSIS >[BOSE AUDIO WITH NAVIGATION]
CAMERA CONTROL UNIT
Wiring Diagram — BOSE AUDIO WITH NAVIGATION SYSTEM —
INFOID:0000000003971967
JCNWM0897GB

AV-640
< SYMPTOM DIAGNOSIS >[BOSE AUDIO WITH NAVIGATION]
MULTI AV SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
MULTI AV SYSTEM SYMPTOMS
Symptom TableINFOID:0000000003765976
RELATED TO BASIC OPERATION
RELATED TO HANDS FREE PHONE
 Check that the cellular phone is corresponding type (Bluetooth™ correspond) when the hands free related
malfunction vehicle is in service before performing a diagnosis,.
 There is a case that malfunction occurs due to the version change of the phone type, etc. even though it is a
corresponding type. Therefore, confirm it by changing the cellular phone to another corresponding type
phone, and check that it operates normally. It is necessary to distinguish whether the cause is the vehicle or
cellular phone.
Simple check for Bluetooth™ communication
If cellular phone and NAVI control unit cannot be connected with Bluetooth™ communication, following proce-
dure allows the technician to judge which device has malfunction.
1. Turn on a cellular phone, not connecting Bluetooth
™ communication.
2. Start CONSULT-III, then start Windows
®.
3. Set CONSULT-III near a cellular phone.
4. When operated Bluetooth
™ registration by cellular phone, check
if CONSULT-III
* would be displayed on the device name.
(If other Bluetooth
™ device is located near cellular phone, a
name of the device would be displayed also.)
NOTE:
*:Displayed device name is “NISSAN- ”.
 If no device name is displayed, cellular phone is malfunction.
Repair the cellular phone first, then perform diagnosis.
 If CONSULT-III is displayed on device name, cellular phone is nor-
mal. Perform diagnosis as per the following table.
Symptoms Check items Possible malfunction location / Action to take
Multifunction switch and preset
switch operation does not work. All switches cannot be operated
 “MULTI AV” is displayed on system
selection screen when the CON-
SULT-III is started.Perform CONSULT-III self-diagnosis. Refer to AV- 4 3 4 ,
"CONSULT-III Function (MULTI AV)".
 All switches cannot be operated
 “MULTI AV” is not displayed on sys-
tem selection screen when the CON-
SULT-III is started.AV control unit power supply and ground circuit malfunc-
tion. Refer to AV- 4 6 4 , "
AV CONTROL UNIT : Diagnosis
Procedure".
Only specified switch cannot be operat-
ed.Multifunction switch or preset switch malfunction.
Replace multifunction switch or preset switch.
For multifunction switch, refer to AV- 6 5 9 , "
Removal and
Installation".
For preset switch, refer to AV- 6 6 0 , "
Removal and Instal-
lation".
Fuel economy display, vehicle set-
ting operation is abnormal.There is malfunction in the CONSULT-
III self-diagnosis result.Perform detected DTC diagnosis.
There is no malfunction in the self-diag-
nosis results.Ignition signal circuit malfunction.
Refer to AV- 4 6 4 , "
AV CONTROL UNIT : Diagnosis Pro-
cedure".
Guide sound is not heard.On the setting display select “system
sound (guide sound volume, etc.),” and
confirm that guide sound is ON.Voice guidance signal circuit malfunction.
JPNIA0441GB

AV
MULTI AV SYSTEM SYMPTOMS
AV-641
< SYMPTOM DIAGNOSIS >[BOSE AUDIO WITH NAVIGATION]
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RELATED TO REAR VIEW MONITOR
RELATED TO RGB IMAGE
Symptoms Check items Possible malfunction location / Action to take
Does not recognize cellular
phone connection. (no connec-
tion is displayed on the display
at the guide.)There is malfunction in the CONSULT-III
self-diagnosis result.Perform detected DTC diagnosis.
There is no malfunction in the CONSULT-
III self-diagnosis results.Repeat the registration of cellular phone.
Hands free phone cannot be
established. Hands free phone operation can be
made, but the communication cannot
be established.
 Hands free phone operation can be per-
formed, however, voice between each
other cannot be heard during the con-
versation.NAVI control unit malfunction.
Replace NAVI control unit.
Refer to AV- 6 4 9 , "
Removal and Installation".
The other party's voice cannot
be heard by hands free phone.Check the “Handsfree Voice Microphone
Test”in Confirmation/Adjustment mode if
sound is heard. Refer to AV- 4 1 9 , "
Diagno-
sis Description".NAVI control unit malfunction.
Replace NAVI control unit.
Refer to AV- 6 4 9 , "Removal and Installation".
Check the “Handsfree Voice Microphone
Test”in Confirmation/Adjustment mode if
sound is not heard. Refer to AV- 4 1 9 , "
Di-
agnosis Description"
TEL voice signal circuit.
Originating sound is not heard
by the other party with hands
free phone communication.Sound operation function is normal.NAVI control unit malfunction.
Replace NAVI control unit.
Refer to AV- 6 4 9 , "
Removal and Installation".
Sound operation function does not work.Microphone signal circuit malfunction.
Refer to AV- 4 8 2 , "
Diagnosis Procedure".
Symptoms Check itemsProbable malfunction location / Action
to take
It cannot be switched to rear view
monitor even when the selector le-
ver is in the reverse position. There is malfunction in the CONSULT-III self-diagno-
sis result.Perform CONSULT-III self-diagnosis.
Refer to AV- 4 3 4 , "
CONSULT-III Func-
tion (MULTI AV)".
There is not malfunction in the CONSULT-III self-diag-
nosis result.Reverse signal circuit malfunction.(AV
control unit)
Camera image is not shown. DVD and AUX images are normal.  Rear view camera power supply cir-
cuit malfunction.
Refer to AV- 4 8 4 , "
Diagnosis Proce-
dure".
 Camera image signal circuit malfunc-
tion.
Refer to AV- 4 8 5 , "
Diagnosis Proce-
dure".
Possible route line is indicated ab-
normally when camera image is dis-
played.The “Steer. Angle Sensor” is not turned ON at “Con-
nection Confirmation” of “Camera Cont.”Steering angle sensor signal circuits.
Refer to AV- 4 8 7 , "
Diagnosis Proce-
dure".
Camera image is rolling. AUX image is rolling Horizontal synchronizing (HP) signal
circuit malfunction between AV con-
trol unit and display unit.
Refer to AV- 4 7 4 , "
Diagnosis Proce-
dure".
 Vertical synchronizing (VP) signal cir-
cuit malfunction between AV control
unit and display unit.
Refer to AV- 4 7 5 , "
Diagnosis Proce-
dure".

AV-642
< SYMPTOM DIAGNOSIS >[BOSE AUDIO WITH NAVIGATION]
MULTI AV SYSTEM SYMPTOMS
RELATED TO AUDIO
Symptoms Check items Possible malfunction location / Action to take
RGB image is not shown. All RGB images are not shown.
 Composite images are not dis-
played.(camera and DVD and AUX im-
age)
 voice sound is heard. Display unit power supply and ground circuit malfunc-
tion.
Refer to AV- 4 6 5 , "
DISPLAY UNIT : Diagnosis Proce-
dure".
 Communication Circuit malfunction between AV control
unit and display unit.
Perform CONSULT-III self-diagnosis.
Refer to AV- 4 3 4 , "
CONSULT-III Function (MULTI AV)".
 All RGB images are not shown.
 Camera image is normal.
 DVD and AUX images are not dis-
played. Perform CONSULT-III self-diagnosis.
Refer to AV- 4 3 4 , "
CONSULT-III Function (MULTI AV)".
 All RGB images are not shown.
 “Multi AV” is not displayed on system
selection screen when the CONSULT-
III is initialized.AV control unit power supply and ground circuit malfunc-
tion.
Refer to AV- 4 6 4 , "
AV CONTROL UNIT : Diagnosis Proce-
dure".
 All RGB images are not shown.
 Composite images are normal. (cam-
era and DVD and AUX image) RGB area (YS) signal circuit malfunction.
Refer to AV- 4 7 3 , "
Diagnosis Procedure".
Map image is not shown.Composite images are normal.(camera
and DVD and AUX image)NAVI control unit power supply and ground circuit mal-
function.
Refer to AV- 4 6 4 , "
NAVI CONTROL UNIT : Diagnosis Pro-
cedure"
 Camera image is normal.
 DVD and AUX images are not dis-
played.
 Audio sound is not heard.Perform CONSULT-III self-diagnosis.
Refer to AV- 4 3 4 , "
CONSULT-III Function (MULTI AV)".
Color of RGB image is not
proper. (All RGB image)Light blue (Cyan) tint.RGB signal (R: red) circuit malfunction between AV con-
trol unit and display unit.
Refer to AV- 4 6 9 , "
Diagnosis Procedure".
Purple (Magenta) tint.RGB signal (G: green) circuit malfunction between AV
control unit and display unit.
Refer to AV- 4 7 0 , "
Diagnosis Procedure".
Screen looks yellowish.RGB signal (B: blue) circuit malfunction between AV con-
trol unit and display unit.
Refer AV- 4 7 8 , "
Diagnosis Procedure".
Color of RGB image is not
proper. (NAVI image only)Light blue (Cyan) tint.RGB signal (R: red) circuit malfunction between NAVI
control unit and AV control unit.
Refer to AV- 4 7 6 , "
Diagnosis Procedure".
Purple (Magenta) tint.RGB signal (G: green) circuit malfunction between NAVI
control unit and AV control unit.
Refer to AV- 4 7 7 , "
Diagnosis Procedure".
Screen looks yellowish.RGB signal (B: blue) circuit malfunction between NAVI
control unit and AV control unit.
Refer to AV- 4 7 8 , "
Diagnosis Procedure".
RGB screen is rolling.All RGB screen is rolling.RGB synchronizing signal circuit malfunction between AV
control unit and display unit.
Refer to AV- 4 7 2 , "
Diagnosis Procedure".
Only NAVI screen is rolling.RGB synchronizing signal circuit malfunction between
NAVI control unit and AV control unit.
Refer to AV- 4 7 9 , "
Diagnosis Procedure".

AV
MULTI AV SYSTEM SYMPTOMS
AV-643
< SYMPTOM DIAGNOSIS >[BOSE AUDIO WITH NAVIGATION]
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RELATED TO STEERING SWITCH
RELATED TO DVD
RELATED TO AUXILIARY INPUT
NOTE:
Check that there is no malfunction of AUX equipment main body before performing a diagnosis.
Symptoms Check items Possible malfunction location / Action to take
The CD cannot be removed. —Disk eject signal circuit.
Refer to AV- 4 8 1 , "
Diagnosis Procedure".
Audio sound is not heard.No sound from all speakers. Perform CONSULT-III self-diagnosis.
Refer to AV- 4 3 4 , "
CONSULT-III Function (MULTI AV)"
 BOSE amp. power supply and ground circuits malfunc-
tion. Refer to AV- 4 6 6 , "
BOSE AMP. : Diagnosis Proce-
dure".
 No sound from all speakers.
 It dose not change to “DVD” mode.
Perform CONSULT-III self-diagnosis.
Refer to AV- 4 3 4 , "
CONSULT-III Function (MULTI AV)"Sound is not heard only from the specific
places.
AM/FM radio is not received. Other audio sounds are normal. Antenna amp. ON signal circuit.
Symptoms Probable malfunction location
None of the steering switch operations work.Steering switch signal GND circuit malfunction.
Refer to AV- 4 9 3 , "
Diagnosis Procedure".
Only specified switch (1) cannot be operated.Steering switch malfunction.
Replace steering switch.
Steering switch's “SOURCE”, “MENU UP”, “MENU DOWN”,
“ ”, “ENTER” switches do not work.Steering switch signal A circuit malfunction.
Refer to AV- 4 8 9 , "
Diagnosis Procedure".
Steering switch's “ ”, “VOL UP”, “VOL DOWN”, “ ”
switches do not work.Steering switch signal B circuit malfunction.
Refer to AV- 4 9 1 , "
Diagnosis Procedure".
Symptoms Check items Probable malfunction location
DVD image is not displayed Displayed in black and nothing displayed. Composite image signal circuit malfunc-
tion between AV control unit and display
unit.
Refer to AV- 4 8 6 , "
Diagnosis Procedure"
 RGB area synchronizing (YS) signal cir-
cuit malfunction between AV control unit
and display unit.
Refer to AV- 4 7 3 , "
Diagnosis Procedure"
 Horizontal synchronizing (HP) signal cir-
cuit malfunction between AV control unit
and display unit.
Refer to AV- 4 7 4 , "
Diagnosis Procedure".
 Vertical synchronizing (VP) signal circuit
malfunction between AV control unit and
display unit.
Refer to AV- 4 7 5 , "
Diagnosis Procedure".
It dose not change to “DVD” mode.LED lump of DVD player is not turned on.DVD player power supply and ground cir-
cuits malfunction.
Refer to AV- 4 6 8 , "
DVD PLAYER : Diagno-
sis Procedure".
LED lump of DVD player is not turned on.Perform CONSULT-III self-diagnosis. Refer
to AV- 4 3 4 , "
CONSULT-III Function (MULTI
AV )"

AV-644
< SYMPTOM DIAGNOSIS >[BOSE AUDIO WITH NAVIGATION]
MULTI AV SYSTEM SYMPTOMS
RELATED TO REAR CONTROL SWITCH
Symptoms Check items Probable malfunction location
No voice sound is heard when
AUX mode is selected.Voice sound is heard when other modes
are selected.AUX sound signal circuits malfunction between auxiliary
input jacks and AV control unit.
AUX image is not displayed displayed in black and nothing can be dis-
played RGB area synchronizing (YS) signal circuit malfunc-
tion between AV control unit and display unit.
Refer to AV- 4 7 3 , "
Diagnosis Procedure".
 Horizontal synchronizing (HP) signal circuit malfunc-
tion between AV control unit and display unit.
Refer to AV- 4 7 4 , "
Diagnosis Procedure".
 Vertical synchronizing (VP) signal circuit malfunction
between AV control unit and display unit.
Refer to AV- 4 7 5 , "
Diagnosis Procedure".
 DVD image is normal.
 Menu image is normal.AUX image signal circuit malfunction between DVD play-
er and auxiliary input jacks.
Refer to AV- 4 8 0 , "
Diagnosis Procedure".
Symptoms Check items Probable malfunction location
None of the rear control switch operations
work.—Perform CONSULT-III self-diagnosis. Refer
to AV- 4 3 4 , "
CONSULT-III Function (MULTI
AV )".

AV
NORMAL OPERATING CONDITION
AV-645
< SYMPTOM DIAGNOSIS >[BOSE AUDIO WITH NAVIGATION]
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NORMAL OPERATING CONDITION
DescriptionINFOID:0000000003765977
NOTE:
For Navigation system operation information, refer to Navigation system Owner's Manual.
BASIC OPERATIONS
RELATED TO AUDIO
 The majority of the audio malfunctions are the result of outside causes (bad CD/cassette, electromagnetic
interference, etc.). Check the symptoms below to diagnose the malfunction.
 The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and oper-
ation of each piece of electrical equipment, and then determine the cause.
NOTE:
 CD-R is not guaranteed to play because they can contain compressed audio (MP3, WMA) or could be incor-
rectly mastered by the customer on a computer.
 Check if the CDs carry the Compact Disc Logo. If not, the disc is not mastered to the red book Compact Disc
Standard and may not play.
Symptom Possible cause Possible solution
No image is displayed.The brightness is at the lowest setting. Adjust the brightness of the display.
The system in the video mode. Push to change the mode.
The display is turned off.
Push <> to turn on the display.
The screen is too dim. The move-
ment is slow.The temperature in the interior of the vehicle is low. Wait until the interior of the vehicle has
warmed up.
Some pixels in the display are dark-
er or brighter than others.This condition is an inherent characteristic of liquid
crystal displays.This is not a malfunction.
Some menu items cannot be se-
lected.Some menu items become unavailable while the ve-
hicle is driven.Park the vehicle in a safe location, and
then operate the multi AV system.
Symptom Cause and Counter measure
Cannot play.Check if the CD was inserted correctly.
Check if the CD is scratched or dirty.
Check if there is condensation inside the player, and if there is, wait until the condensation is gone
(about 1 hour) before using the player.
If there is a temperature increase error, the player will play correctly after it returns to the normal
temperature.
If there is a mixture of music CD files (CD-DA data) and MP3/WMA files on a CD, only the music
CD files (CD-DA data) will be played.
Files with extensions other than “.MP3”, “.WMA”, “.mp3”, or “.wma” cannot be played. In addition,
the character codes and number of characters for folder names and file names should be in com-
pliance with the specifications.
Check if the disc or the file is generated in an irregular format, This may occur depending on the
variation or the setting of MP3/WMA writing applications or other text editing applications.
Check if the finalization process, such as session close and disc close, is done for the disc.
Check if the CD is protected by copyright.
Poor sound quality. Check if the CD is scratched or dirty.
It takes a relatively long time before
the music starts playing.If there are many folder or file levels on the MP3/WMA disc, some time may be required before
the music starts playing.
Music cuts off or skips.The writing software and hardware combination might not match, or the writing speed, writing
depth, writing width might not match the specifications. Try using the slowest writing speed.
Skipping with high bit rate files. Skipping may occur with large quantities if data such as for high bit rate data.

AV-646
< SYMPTOM DIAGNOSIS >[BOSE AUDIO WITH NAVIGATION]
NORMAL OPERATING CONDITION
Noise resulting from variations in field strength, such as fading noise and multi-path noise, or external noise from trains and other
sources, is not a malfunction.
NOTE:
 Fading noise: This noise occurs because of variations in the field strength in a narrow range due to mountains or buildings blocking
the signal.
 Multi-path noise: This noise results from a time difference between the broadcast waves directly from the station arriving at the
antenna and the waves reflected by mountains or buildings.
RELATED TO NAVIGATION
As a result of a slight operating error, a normal symptom might be taken as a malfunction. Therefore, at first,
please check for yourself as per the following table.
Move immediately to the next song
when playing.When a non-MP3/WMA file has been given an extension of “.MP3”, “.WMA”, “.mp3”, or “.wma”,
or when play is prohibited by copyright protection, the player will skip to the next song.
The songs do not play back in the
desired order.The playback order is the order in which the files were written by the software, so the files might
not play in the desired order. Symptom Cause and Counter measure
Symptom Possible cause Possible solution
The map does not scroll even when
the vehicle is moving.The display is not set to the current location map. Set the display to the current location map.
The vehicle icon is not displayed. The display is not set to the current location map. Set the display to the current location map.
The GPS icon is not displayed. GPS signal cannot be received.Move the vehicle to an open area without
obstacle. If an object is placed on the up-
per area of GPS antenna, remove it.
No voice guidance is available.The route guidance was cancelled.If the route destination guidance has been
cancelled, reactivate the route guidance.
The volume is set very low. Adjust the volume of your voice guidance.
Some pixels in the display are dark-
er or brighter than others.This is an inherent characteristic of liquid crystal dis-
plays. Although the liquid crystal display is manufac-
tured with a technology of very high accuracy and it
has more than 99.99% effective pixels, a chip or a
permanent lighting of pixels might occur at 0.01% or
less.Please continue using the NAVI system,
as it is not a malfunction.
A mottle remains for a while after
turning the ignition switch ON.When it is cold, due to the characteristics of the liq-
uid crystal display backlight, a brightness mottle
might occur.It will disappear a few minutes later when
the backlight is warmed-up.
The screen is not clear.The adjustment of the contrast or the brightness is
inadequate.Adjust the contrast and the brightness of
the display.
The vehicle icon is not displayed in
the correct location. (The location
of the vehicle icon is misaligned
from the actual position.) The vehicle icon might be misaligned from the actual
position due to the satellite condition, the vehicle
condition (driving location or driving condition), etc.
Also, when the vehicle is traveling on a road whose
information is not stored in the map data, a new road
for example, the vehicle icon might be misaligned
from the actual position.Drive the vehicle for a while. The current
location is automatically corrected using
the map-matching and GPS information.
(It may take a few minutes.) If the GPS in-
formation is not used and the current loca-
tion is not corrected automatically, park the
vehicle in a safe location, and then correct
the current vehicle location.

AV
PRECAUTIONS
AV-647
< PRECAUTION >[BOSE AUDIO WITH NAVIGATION]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003960544
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the “SRS AIRBAG” and
“SEAT BELT” of this Service Manual.
WARNING:
 To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.
 Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
Precaution for Trouble DiagnosisINFOID:0000000003765979
AV COMMUNICATION SYSTEM
 Do not apply voltage of 7.0 V or higher to the measurement terminals.
 Use the tester with its open terminal voltage being 7.0 V or less.
 Be sure to turn ignition switch OFF and disconnect the battery cable from the negative terminal before
checking the circuit.
Precaution for Harness RepairINFOID:0000000003765980
AV COMMUNICATION SYSTEM
 Solder the repaired parts, and wrap with tape. [Frays of twisted line
must be within 110 mm (4.33 in).]
 Do not perform bypass wire connections for the repair parts. (The
spliced wire will become separated and the characteristics of
twisted line will be lost.)
PKIA0306E
PKIA0307E

DEF-12
< COMPONENT DIAGNOSIS >
REAR WINDOW DEFOGGER SWITCH
REAR WINDOW DEFOGGER SWITCH
WITH AV CONTROL UNIT
WITH AV CONTROL UNIT : DescriptionINFOID:0000000003840821
 The rear window defogger is operated by turning the rear window defogger switch ON.
 The indicator lamp in the rear window defogger illuminates when the rear window defogger is operating.
WITH AV CONTROL UNIT : Component Function CheckINFOID:0000000003840822
1.CHECK FUNCTION
Check that the indicator lamp of rear window defogger illuminates when rear window defogger switch is ON.
Is the inspection result normal?
YES >> Rear window defogger switch function is OK.
NO >> Refer to DEF-12, "
WITH AV CONTROL UNIT : Diagnosis Procedure"
WITH AV CONTROL UNIT : Diagnosis ProcedureINFOID:0000000003840823
1.CHECK MULTIFUNCTION SWITCH (REAR WINDOW DEFOGGER SWITCH)
Does multifunction switch operate normally?
 Base audio with AV control unit. Refer to AV-15, "
Diagnosis Description".
 BOSE audio with navigation system. Refer to AV-419, "
Diagnosis Description".
 BOSE audio without navigation system. Refer to AV-200, "
Diagnosis Description".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair or replace the malfunctioning parts.
WITHOUT AV CONTROL UNIT
WITHOUT AV CONTROL UNIT : DescriptionINFOID:0000000003806036
 The rear window defogger is operated by turning the rear window defogger switch ON.
 The indicator lamp in the rear window defogger illuminates when the rear window defogger is operating.
WITHOUT AV CONTROL UNIT : Component Function CheckINFOID:0000000003806037
1.CHECK FUNCTION
Check (REAR DEF) in “DATA MONITOR”mode with CONSULT-III when rear window defogger switch is ON.
Is the inspection result normal?
YES >> Rear window defogger switch function is OK.
NO >> Refer to DEF-12, "
WITHOUT AV CONTROL UNIT : Diagnosis Procedure"
WITHOUT AV CONTROL UNIT : Diagnosis ProcedureINFOID:0000000003806038
1.CHECK A/C CONTROL (REAR WINDOW DEFOGGER SWITCH)
Check A/C control system.
Refer to HAC-6, "
Work Flow".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK BCM OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Turn ignition switch ON.
4. Check voltage between A/C auto amp. harness connector and ground with oscilloscope.