ignition INFINITI QX4 2005 Factory Service Manual

AUDIO
AV-21
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AV
Revision: October 20052005 QX56
44 (W) 43 (B)Audio right
channel
sound sig-
nal from sat-
ellite radio
tunerInput ONReceive audio
signalNo sound from satel-
lite radio tuner right
channel.
45 –Shield
ground
(audio sig-
nal)–– – 0V –
46 –Shield
ground
(data)–– – 0V –
48 (L) GroundSatellite
radio tuner
request to
audio unitInput ONTurn audio unit
ON 5VSatellite radio tuner
does not operate
properly.
49 (O/L) Ground Audio RX Input ONOperate audio
volume Satellite radio tuner
audio information
does not display
properly.
50 (W/L) Ground Audio TX Output ONOperate audio
volume Satellite radio tuner
audio information
does not display
properly.
65 (O/L) Ground Audio RX Input ONOperate audio
volume Audio does not oper-
ate properly.
66 (W/L) Ground Audio TX Output ONOperate audio
volume Audio does not oper-
ate properly.
67 – Shield – ON – 0VInterference and dis-
tortion heard from
speakers.
70 – Shield – – – 0VInterference and dis-
tortion heard from
speakers. Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of symptom
+–Ignition
switchOperation
SKIA0177E
SKIA4403E
SKIA4402E
SKIA4403E
SKIA4402E

AV-22
AUDIO
Revision: October 20052005 QX56
Terminals and Reference Value for BOSE Speaker Amp.EKS00BIC
71 (B) 69 (W)Voice guide
signal (with
NAVI)Output ONPress the
"GUIDE/VOICE"
button.Only route guide and
operation guide are
not heard.
72 (W/B) GroundCD eject
signalInput ONOperate EJECT
button0V→5VCD will not eject from
audio unit.
73 (Y/B) GroundCD load sig-
nalInput ONOperate LOAD
button0V→5VCD will not load into
audio unit. Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of symptom
+–Ignition
switchOperation
SKIA0171J
Te r m i n a l
(wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of
symptom
+–Ignition
switchOperation
1 (Y) Ground Battery Input – – Battery voltageSystem does not
work properly.
9 (SB) 10 (B/Y)Rear door
speaker LH
and rear door
tweeter LHOutput ONReceive audio
signalNo sound from
rear door speaker
LH or rear door
tweeter LH.
11 (O/L) 12 (R/L)Rear door
speaker RH
and rear door
tweeter RHOutput ONReceive audio
signalNo sound from
rear door speaker
RH or rear door
tweeter RH.
13 (L/W) 14 (L/R)Front door
speaker LH
and front
tweeter LHOutput ONReceive audio
signalNo sound from
front door speaker
LH or front tweeter
LH.
15 (W/B) 16 (L/B)Front door
speaker RH
and front
tweeter RHOutput ONReceive audio
signalNo sound from
front door speaker
RH or front tweeter
RH.
17 (B) Ground Ground – ON – – –
SKIA0177E
SKIA0177E
SKIA0177E
SKIA0177E

AUDIO
AV-23
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AV
Revision: October 20052005 QX56
18 (V) 2 (R)Center
speakerOutput ONReceive audio
signalNo sound from
center speaker.
19 (W) 3 (B) Subwoofer Output ONReceive audio
signalNo sound from
subwoofer.
22
(W/G)GroundSubwoofer ON
signalInput ON – More than 6.5VSubwoofer does
not work properly.
24 (L) 23 (B/W)Audio sound
signal rear RHInput ONReceive audio
signalNo sound from
rear door speaker
RH or rear door
tweeter RH.
26 (BR) 25 (B/R)Audio sound
signal rear LHInput ONReceive audio
signalNo sound from
rear door speaker
LH or rear door
tweeter LH.
28 (Y) 27 (BR)Audio sound
signal front RHInput ONReceive audio
signalNo sound from
front door speaker
RH or front tweeter
RH.
30 (W) 29 (B)Audio sound
signal front LHInput ONReceive audio
signalNo sound from
front door speaker
LH or front tweeter
LH.
31 (G/W) GroundAmp. ON sig-
nalInput ON – More than 6.5VSystem does not
work properly. Terminal
(wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of
symptom
+–Ignition
switchOperation
SKIA0177E
SKIA0177E
SKIA0177E
SKIA0177E
SKIA0177E
SKIA0177E

AV-24
AUDIO
Revision: October 20052005 QX56
Terminals and Reference Value for Rear Audio Remote Control UnitEKS00BID
Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of symptom
+–Ignition
switchOperation
2 (G) 1 (B)Audio sound
signal LHInput ONReceive audio
signalNo sound from LH
headphone channel.
4 (W) 3 (R)Audio sound
signal RHInput ONReceive audio
signalNo sound from RH
headphone channel.
5 – Shield – – – 0VInterference and dis-
tortion heard from
headphones or rear
audio remote control
unit switches not
operating properly.
6 (R/L) Ground Illumination Input ONLighting switch
ON12V
Rear audio remote
control unit does not
illuminate. Lighting switch
OFF0V
7 (LG) –Remote
control
ground–– – 0VRear audio remote
control unit switches
do not function.
8 (O) GroundRemote
control
enable sig-
nalInput ON Audio unit ON 5VRear audio remote
control unit does not
operate.
9 (V) GroundRemote
control AInput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
10 (P) GroundRemote
control BInput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
11
(BR/Y)GroundRemote
control CInput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
12 (L) GroundRemote
control DInput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
13 (V) GroundRemote
control
switch
power sup-
plyInput ON Audio unit ON 12VRear audio remote
control does not
operate.
15 (B) – Ground – ON – 0V –
SKIA0177E
SKIA0177E

AUDIO
AV-25
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AV
Revision: October 20052005 QX56
Terminals and Reference Value for AV SwitchEKS00BIE
Te r m i n a l N o .
(Wire color)
ItemSignal
input/
outputCondition
Voltag e
(Approx.)Example of
symptom
+–Ignition
switchOperation
1 (Y) GroundBattery
powerInput OFF – Battery voltageSystem does not
work properly.
2 (V) Ground ACC signal Input ACC – Battery voltageSystem does not
work properly.
3 (R/L) GroundIllumination
signalInput OFFLighting switch is
ON (position 1).Battery voltageAV switch illumi-
nation does not
come on when
lighting switch is
ON (position 1). Turn lighting switch
OFF.Approx. 3.0V or less
4 (BR) GroundIllumination
control signalInput ONIllumination control
switch is operated
by lighting switch in
1st position.Changes between 0 and 12V.AV switch illumi-
nation cannot be
controlled.
5 (B) Ground Ground – ON – 0V –
6 (V) GroundCommunica-
tion signal (+)Input/
outputON –System does not
work properly.
7–Shield
ground–– – –
8 (LG) GroundCommunica-
tion signal (-)Input/
outputON –System does not
work properly.
12 (R) GroundRemote con-
trol AInput ONPress MODE
switch 0V
Steering wheel
audio controls
do not function. Press SEEK UP
switch0.75V
Press VOL UP
switch2V
Except for above 5V
13 (G) GroundRemote con-
trol BInput ONPress POWER
switch 0V
Steering wheel
audio controls
do not function. Press SEEK
DOWN switch0.75V
Press VOL DOWN
switch2V
Except for above 5V
14 (L) –Remote con-
trol ground–– – –Steering wheel
audio controls
do not function.
16 (W/B) GroundCD EJECT
signalOutput ONPressed 0V
CD eject does
not function.
Released 5V
SKIA0175E
SKIA0176E

AV-26
AUDIO
Revision: October 20052005 QX56
17 (Y/B) GroundCD LOAD
signalOutput ONPressed 0V
CD load does
not function.
Released 5V Te r m i n a l N o .
(Wire color)
ItemSignal
input/
outputCondition
Voltage
(Approx.)Example of
symptom
+–Ignition
switchOperation

AUDIO
AV-27
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AV
Revision: October 20052005 QX56
AV Switch Self-Diagnosis FunctionEKS00BIF
It can check ON/OFF operation of each switch in the AV switch and diagnose the input signals from the steer-
ing switch.
STARTING THE SELF-DIAGNOSIS MODE
1. Turn ignition switch from OFF to ACC.
2. Within 10 seconds press and hold the switches “PAUSE/MUTE”
and “PREV” simultaneously for 3 seconds.
Then the self-diagnosis operates. A single beep indicates self-
diagnosis mode is active.
3. Press each switch and listen for beep.
NOTE:
CD player LOAD and EJECT buttons are not included in this test
and will not beep when pressed.
EXITING THE SELF-DIAGNOSIS MODE
Turn ignition switch OFF. Then the self-diagnosis ends.
DIAGNOSIS FUNCTION

It can check for continuity of the switches by sounding the beep when each AV switch and steering switch
is pressed.

It can check for continuity of harness between AV switch and steering switch.
WKIA1489E

AUDIO
AV-29
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AV
Revision: October 20052005 QX56
NOTE:
1. The following noise results from variations in field strength, such as fading noise and multi-path noise, or
external noise from trains and other sources. It is not a malfunction.

Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-
tains or buildings blocking the signal.

Multi-path noise: This noise results from the waves sent directly from the broadcast station arriving at the
antenna at a different time from the waves which reflect off mountains or buildings.
FOR CD ONLY
Noise InspectionEKS00BIH
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 opera-
tion of each piece of electrical equipment, and determine the cause.
NOTE:
The source of the noise can be found easily by listening to the noise while removing the fuses of electrical
components, one by one.
TYPE OF NOISE AND POSSIBLE CAUSE
Symptom Possible cause
CD cannot be inserted.

CD

Audio unit CD cannot be ejected.
The CD cannot be played.
The sound skips, stops suddenly, or is distorted.
Occurrence condition Possible cause
Occurs only when engine is ON.A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed.

Ignition components
A whistling noise occurs while the engine speed is
high. A booming noise occurs while the engine is
running and the lighting switch is ON.

Generator
The occurrence of the noise is linked with the operation of the fuel pump.

Fuel pump condenser
Noise only occurs when various
electrical components are oper-
ating.A cracking or snapping sound occurs with the
operation of various switches.

Relay malfunction, audio unit malfunction
The noise occurs when various motors are operat-
ing.

Motor case ground

Motor
The noise occurs constantly, not just under certain conditions.

Rear defogger coil malfunction

Open circuit in printed heater

Poor ground of antenna amplifier or
antenna feeder line
A cracking or snapping sound occurs while the vehicle is being driven, especially
when it is vibrating excessively.

Ground wire of body parts

Ground due to improper part installation

Wiring connections or a short circuit

AV-30
AUDIO
Revision: October 20052005 QX56
Power Supply Circuit InspectionEKS00BII
1. CHECK FUSES
Check that the following fuses are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
Unit Terminals Signal name Fuse No.
Audio unit6 Battery power 31
10 Ignition switch ACC or ON 4
AV s w i t c h1 Battery power 31
2 Ignition switch ACC or ON 4
BOSE speaker amp. 1 Battery power 31
Subwoofer 6 Battery power 17

AV-32
AUDIO
Revision: October 20052005 QX56
Steering Switch CheckEKS00BIJ
1. AV SWITCH SELF-DIAGNOSIS FUNCTION CHECK
1. Start AV switch self-diagnosis function. Refer to AV- 2 7 , "
AV Switch Self-Diagnosis Function" .
2. Operate steering switch.
Does steering switch operate normally?
YES >> Inspection End.
NO >> GO TO 2.
2. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect AV switch connector M98 and spiral cable connector M30.
3. Check continuity between spiral cable harness connector terminal and AV switch harness connector ter-
minal.
4. Check continuity between AV switch and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3. SPIRAL CABLE CHECK
1. Disconnect spiral cable connectors M30 and M102.
2. Check continuity between spiral cable terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace spiral cable. Refer to SRS-48, "
SPIRAL CABLE" .
Te r m i n a l s
Continuity Spiral cable AV switch
Connector Terminal Connector Terminal (Wire color)
M3032 (G)
M9813 (G)
Ye s 31 (L) 14 (L)
24 (R) 12 (R)
Te r m i n a l s
Continuity AV s w i t c h
—
Connector Terminal (Wire color)
M9812 (R)
Ground No 13 (G)
14 (L)
WKIA1600E
Terminals
Continuity Spiral cable
Connector Terminal Connector Terminal
M3032
M10216
Ye s 31 17
24 20
WKIA3489E