Ignition switch INFINITI FX35 2005 Service Manual

AV-8
AUDIO
Revision: 2005 July 2005 FX
System DescriptionAKS005T3
BASE SYSTEM
Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times

through 15A fuse (No. 32, located in the fuse and fusible link block)

to audio unit terminal 6

to A/C and AV switch terminal 1

to display unit terminal 1 and

to option connector–2 for satellite radio receiver terminal 12.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 6, located in the fuse block (J/B)]

to audio unit terminal 10

to A/C and AV switch terminal 2

to display unit terminal 2 and

to option connector–2 for satellite radio receiver terminal 11.
Ground is supplied through the case of the audio unit.
Ground is also supplied

to A/C and AV switch terminal 5 and

to display unit terminal 6 and 15

through body ground M35, M45 and M85,

to option connector–2 for satellite radio receiver terminal 10

through body ground B203 and B210.
Audio unit, A/C and audio controller are connected by FPC (Flexible Print Circuit).
A/C and audio controller integrates A/C switches and audio switches.
When A/C and audio controller is pushed to audio switch, it sends audio signal to audio unit. Then audio sig-
nals are supplied

through audio unit terminals 1, 2, 3, 4, 13, 14, 15, and 16

to terminals 1 and 2 of front door speaker LH and RH

to terminals 1 and 2 of rear door speaker LH and RH and

to terminals 1 and 2 of instrument speaker LH and RH.
When one of audio steering wheel switch is pushed to volume up, seek up, or mode ON, resistance in steering
switch circuit changes depending on which button is pushed.
When one of audio steering wheel switch is pushed to volume down, seek down, or power ON, resistance in
audio steering wheel switch circuit changes depending on which button is pushed.
BOSE SYSTEM
Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times

through 15A fuse (No. 32, located in the fuse and fusible link block)

to audio unit terminal 6

to woofer terminal 1

to A/C and AV switch terminal 1

to display control unit terminal 1 (with navigation system) or display unit terminal 1 (without navigation sys-
tem) and

to option connector–2 for satellite radio receiver terminal 12

through 20A fuse [No.17, located in the fuse block (J/B)]

to BOSE speaker amp. terminal 1.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 6, located in the fuse block (J/B)]

to audio unit terminal 10

to A/C and AV switch terminal 2

AUDIO AV-33
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Revision: 2005 July 2005 FX
Terminals and Reference Value for Audio UnitAKS00AM1
Terminal
(Wire color) Item Signal
input/
output Condition
Reference value Example of
symptom
+– Ignition
switch Operation
2 (W)
*1 ,
(L)*21 (B)*1 ,
(B/W)*2
Audio sound
signal
(Front LH) Output ACC
Receive audio
signal No sound from
front door speaker
LH or instrument
speaker LH.
4 (G)*
1 ,
(G/B)*23 (R)*1 ,
(B/R)*2
Audio sound
signal
(Front RH) Output ACC No sound from
front door speaker
RH or instrument
speaker RH.
5 (R/W) Ground Antenna
signal Output ACC — Approx. 12 V Antenna amp.
does not work
properly.
6 (W/L) Ground Battery power
supply Input OFF — Battery voltage System will not
work properly.
9*
1—Shield — — — — —
10
(LG/R) GroundACC power
supply Input ACC — Battery voltage System does not
work properly
11 *
1—Shield — — — — —
12*
1
(G/W) Ground Amp ON signal Output ACC — Approx. 12 V BOSE speaker
amp. does not
work properly.
14(BR)* ,
(L/W)*
2
13 (Y)*1 ,
(B/Y)*2
Audio sound
signal
(Rear LH) Output ACC
Receive audio
signal No sound from
rear door speaker
LH.
16 (L)*
1 ,
(R/G)*215 (P)*1 ,
(L/B)*2
Audio sound
signal
(Rear RH) Output ACC No sound from
rear door speaker
RH.
21
(B/Y) Ground Audio TX signal
(AUD -
DCU,DSP) Output ACC
Operate audio
volume Audio does not
operate properly.
22
(W/L) Ground Vehicle speed
signal
(2 pulse) Input ON When vehicle
speed is
approx. 40
km/h
(25MPH) speed sensitive
volume system
dose not work
properly.
23 (LG) Ground Audio RX sig-
nal (DCU,DSP
- AUD) Input ACC
Operate audio
volume Audio does not
operate properly.
25 — Shield — — — —
SKIA0177E
SKIA0177E
SKIA4402E
ELF1080D
SKIA4403E

AV-34
AUDIO
Revision: 2005 July 2005 FX
*1: BOSE system
*2: BASE system
Terminals and Reference Value for BOSE Speaker Amp.AKS005T8
Te r m i n a l
(Wire color) Item Signal
input/
output Condition
Reference value Example of
symptom
+– Ignition
switch Operation
1 (R) Ground Battery power
supply Input OFF — Battery voltage System does not
work properly.
9 (LG) 10 (B/Y) Audio sound
signal
(Rear LH) Output ACC
Receive audio
signal No sound from rear
door speaker LH.
11 (OR) 12 (B/P) Audio sound
signal
(Rear RH) Output ACC
No sound from rear
door speaker RH.
13 (L) 14 (B/W) Audio sound
signal
(Front LH) Output ACC
Receive audio
signal No sound from
front door speaker
LH and instrument
speaker LH
15 (BR) 16 (B/R) Audio sound
signal
(Front RH) Output ACC No sound from front
door speaker RH
and instrument
speaker RH.
17 (B) Ground Ground (Power) — ON — Approx. 0 V BOSE speaker
amp. dose not work
properly.
18
(R/L) 2 (B) Audio sound
signal
(Instrument
CENTER) Output ACC
Receive audio
signal No sound from
instrument speaker
CENTER.
19 (W) 3 (B) Woofer signal Output ACC Receive audio
signal No sound from
woofer.
20 (G) 4 (G/W) Tweeter signal Output ACC Receive audio
signal No sound from
tweeter.
22 (P) Ground Amp ON signal
(woofer) Output ACC — Approx. 12 V Woofer does not
work properly.
SKIA0177E
SKIA0177E
SKIA0177E
SKIA0177E
SKIA0177E

AUDIO AV-35
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24 (L) 23 (B/W) Audio sound
signal
(Rear RH) Input ACC
Receive audio
signal No sound from rear
door speaker RH.
26
(B/R) 25
(BR) Audio sound
signal
(Rear LH) Input ACC
No sound from rear
door speaker LH.
28 (LG) 27 (PU) Audio sound
signal
(Front RH) Input ACC
Receive audio
signal No sound from front
door speaker RH or
instrument speaker
RH.
30 (W) 29 (B) Audio sound
signal
(Front LH) Input ACC No sound from front
door speaker LH or
instrument speaker
LH.
31 (P) Ground Control signal Input ACC — Approx. 12 V BOSE speaker
amp. does not work
properly.
Terminal
(Wire color) Item Signal
input/
output Condition
Reference value Example of
symptom
+– Ignition
switch Operation
SKIA0177E
SKIA0177E

AV-36
AUDIO
Revision: 2005 July 2005 FX
Terminals and Reference Value for A/C and AV SwitchAKS00A2B
Terminal No.
(Wire color) Item Signal
input/
output Condition
Voltage Example of
symptom
+– Ignition
switch Operation
1 (W/L) Ground Battery power
supply Input OFF — Battery voltage System does not
work properly.
2 (LG/R) Ground ACC power
supply Input ACC — Battery voltage System does not
work properly.
3 (R/L) Ground Illumination
signal Input OFF Lighting switch is
ON (position 1). Approx. 12 V
A/C and AV
switch illumina-
tion does not
come on when
lighting switch is
ON (position 1).
Turn lighting switch
OFF. Approx. 0 V
4 (R/Y) Ground Illumination
control signal Output ON Illumination control
switch is operated
by lighting switch in 1st or 2nd position. Changes between approx.0 V
and approx.12 V Audio unit illumi-
nation can not be
controlled.
5 (B) Ground Ground — ON — Approx. 0 V —
6 (B/R) Ground Communica-
tion signal (+) Input/
Output ON — System does not
work properly.
7 — Shield — — — — —
8 (W/R) Ground Communica-
tion signal (–) Input/
Output ON —
System does not
work properly.
12 (R/G) Ground Steering SW
A Input ON Press MODE switch. Approx. 0 V
Steering wheel
audio controls do
not function
Press SEEK UP
switch. Approx. 1.7 V
Press VOL UP
switch. Approx. 3.3 V
Except for above Approx. 5 V
13 (G/W) Ground Steering SW
B Input ON Press POWER
switch. Approx. 0 V
Steering wheel
audio controls do
not function
Press SEEK DOWN
switch. Approx. 1.7 V
Press VOL DOWN
switch. Approx. 3.3 V
Except for above Approx. 5 V
14 (B/Y) — Steering SW
ground —— — — Steering wheel
audio controls do
not function.
SKIA0175E
SKIA0176E

AUDIO AV-37
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Terminals and Reference Value for WooferAKS00AM2
A/C and AV Switch Self-Diagnosis FunctionAKS007OE
It can check ON/OFF operation of each switch in the A/C and AV switch and diagnose the input signals to the
audio steering wheel switch.
STARTING THE SELF-DIAGNOSIS MODE
1. Turn ignition switch from OFF to ACC.
2. Within 10 seconds press and hold the switches “MUTE/ II ” and
“MAP ”simultaneously for 3 seconds.
Then the self-diagnosis operates.
EXITING THE SELF-DIAGNOSIS MODE

Turn ignition switch OFF. Then the self-diagnosis ends.
DIAGNOSIS FUNCTION

It can illuminate all the indicators (LED) in the A/C and AV switch.

It can check for continuity of the switches by sounding the buzzer when the A/C and AV switch is pressed.

It can check for continuity of harness between A/C and AV switch and audio steering wheel switch.
Terminal No. (Wire color) Item Signal
input/
output Condition
Voltag e Example of
symptom
+– Ignition
switch Operation
1 (G/R) Ground Battery power
Supply Input OFF — Battery voltage No sound from
woofer.
2 (B) Ground Ground — ON — Approx. 0 V No sound from
woofer.
5 (P) Ground Amp ON signal Input ACC — Approx. 12 V No sound from
woofer.
7 (W) 8 (B) Woofer sound
signal Input ACC Receive audio sig-
nal No sound from
woofer.
SKIA0177E
PKIB4130E

AV-40
AUDIO
Revision: 2005 July 2005 FX
Noise InspectionAKS005TC
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunction.
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
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 condenser
A whistling noise occurs while the engine speed is
high. A booming noise occurs while the engine is run-
ning and the lighting switch is ON.

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

Fuel pump condenser
Noise only occurs
when various elec-
trical components
are operating. A cracking or snapping sound occurs with the opera-
tion of various switches.

Relay malfunction, radio malfunction
The noise occurs when various motors are operating.

Motor case ground

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

Rear window defogger coil malfunction

Open circuit in printed heater

Poor ground of antenna amplifier or antenna feeder
line

Mirror type film is attached on the rear window glass

After-market TV antenna and/or electrical accessories
such as radio are attached on the rear window glass.
A cracking or snapping sound occurs while the vehicle is being driven,
especially when it is vibrating excessively.

Poor ground of audio parts

Poor ground due to incorrect installation of parts

Poor wiring connections or a short circuit

AUDIO AV-41
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Power Supply Circuit InspectionAKS005TD
1. CHECK FUSE
Check that the following fuses of the BOSE speaker amp., woofer, and audio unit are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
3, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Check voltage between the audio unit connector and ground.
2. Check voltage between BOSE speaker amp.connector or woofer connector and ground.
OK or NG
OK >>
INSPECTION END (Audio unit is OK.)

GO TO 3. (BOSE speaker amp. and woofer)
NG >> Repair harness or connector between each unit and fuse.
Unit Te r m i n a l
(Wire color) Signal name Fuse No.
Audio unit 6 (W/L) Battery power supply 32
10(LG/R) ACC power supply 6
BOSE speaker amp. 1(R) Battery power supply 17
Woofer 1(G/R) Battery power supply 32
Unit Terminal No.
Ignition switch Voltage
(+)
(–)
Connector Terminal
(Wire color)
Audio
unit M58 6 (W/L) Ground OFF Battery voltage
10 (LG/R) Ground ACC Battery voltage
PKIA3814E
Unit Terminal No.
Ignition switch Voltag e
(+)
(–)
Connector Terminal
(Wire color)
BOSE
speaker
amp. B212 1 (R) Ground OFF Battery voltage
Woofer B223 1 (G/R) Ground OFF Battery voltage
SKIA8931E

AUDIO AV-43
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2. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect A/C and AV switch connector and spiral cable connector.
3. Check continuity between spiral cable harness connector terminals and A/C and AV switch harness con- nector terminals.
4. Check continuity between A/C and AV switch and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK SPIRAL CABLE
1. Disconnect spiral cable connector (Audio steering wheel switch harness side).
2. Check continuity between spiral cable connector terminal 24, 31, 32 and terminal 20, 17, 16.
OK or NG
OK >> GO TO 4.
NG >> Replace spiral cable.
Te r m i n a l s
Continuity
A/C and AV switch Spiral cable
Connector Terminal
(Wire color) Connector Terminal
(Wire color)
M64 12 (R/G)
M15 24 (R/G)
Ye s
13 (G/W) 32 (G/W)
14 (B/Y) 31 (B/Y)
Terminals Continuity
A/C and AV switch
—
Connector Terminal (Wire color)
M64 12 (R/G)
Ground No
13 (G/W)
14 (B/Y)
SKIA5955E
Terminals Continuity
Spiral cable
Connector Terminal Connector Terminal
M15 24
M203 20
Ye s
32 16
31 17
SKIA5874E

AUDIO AV-45
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2. CHECK AMP. ON SIGNAL
1. Connect audio unit connector.
2. Turn the ignition switch ACC.
3. Check voltage between audio unit harness connector M59 ter- minal 12 (G/W) and ground.
OK or NG
OK >> INSPECTION END (System is OK.)
NG >> Replace audio unit.
Vehicle Speed Signal InspectionAKS007VI
1. CHECK VEHICLE SPEED OPERATION
Start engine and drive vehicle.
Dose speedometer is operated normally?
Ye s > > G O T O 2 .
No >> Check combination meter trouble diagnosis. Refer to DI-15, "
Trouble Diagnosis" .
2. CHECK HARNESS
1. Turn the ignition switch OFF.
2. Disconnect audio unit connector and unified meter and A/C amp. connector.
3. Check continuity between audio unit harness connector M60 ter- minal 22 (W/L) and unified meter and A/C amp. harness connec-
tor M56 terminal 34 (W/L).
4. Check continuity between audio unit harness connector M60 ter- minal 22 (W/L) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector. 12 (G/W) – Ground : Approx. 12 V
SKIA6818E
22 (W/L) – 34(W/L) : Continuity should exist.
22 (W/L) – Ground : Continuity should not exist.
SKIA6807E