2004 INFINITI QX56 ignition

AV-26
AUDIO
Revision: August 20072004 QX56
17 (Y/B) GroundCD LOAD
signalOutput ONPressed 0V
CD load does
not function.
Released 5V
24 (W/R) GroundVehicle
speed signalInput ON Vehicle is drivenSpeed sensitive
volume function
does not work
properly. Te r m i n a l N o .
(Wire color)
ItemSignal
input/
outputCondition
Voltage
(Approx.)Example of
symptom
+–Ignition
switchOperation
SKIA0175E

AUDIO
AV-27
C
D
E
F
G
H
I
J
L
MA
B
AV
Revision: August 20072004 QX56
AV Switch Self-Diagnosis FunctionEKS007KI
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

AV-30
AUDIO
Revision: August 20072004 QX56
FOR CD ONLY
Noise InspectionEKS007KK
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
Power Supply Circuit InspectionEKS007KL
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" .
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
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: August 20072004 QX56
Steering Switch CheckEKS007KM
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 and spiral cable connector.
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 connector.
2. Check continuity between spiral cable terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace spiral cable. Refer to SRS-47, "
Removal and Installation" .
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
Terminal Terminal
32 16
Ye s 31 17
24 20
WKIA3489E

AUDIO
AV-35
C
D
E
F
G
H
I
J
L
MA
B
AV
Revision: August 20072004 QX56
2. FRONT SPEAKER SIGNAL CHECK
1. Connect BOSE speaker amp. connector M113 and suspect speaker connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal BOSE speaker amp. harness connector M113
terminal with CONSULT-II or oscilloscope.
OK or NG
OK >> Replace suspect speaker. Refer to AV- 4 5 , "Removal
and Installation of Front Door Speaker" or AV- 4 6 ,
"Removal and Installation of Front Tweeter" .
NG >> GO TO 3.
Te r m i n a l s
Condi-
tionReference
signal (+) (-)
Con-
nectorTe r m i n a l
(Wire
color)Con-
nectorTe r m i -
nal
(Wire
color)
M11313 (L/W)
M11314 (L/R)
Receive
audio
signal 15 (W/B) 16 (L/B)
SKIA4283E
SKIA0177E

AUDIO
AV-37
C
D
E
F
G
H
I
J
L
MA
B
AV
Revision: August 20072004 QX56
4. FRONT SPEAKER SIGNAL CHECK
1. Connect audio unit connector and BOSE speaker amp. connector.
2. Turn ignition switch ACC.
3. Push “POWER” switch.
4. Check the signal audio unit harness connector terminal with
CONSULT-II or oscilloscope.
OK or NG
OK >> Replace BOSE speaker amp. Refer to AV- 4 6 , "Removal
and Installation of BOSE Speaker Amp." .
NG >> Replace audio unit. Refer to AV- 4 5 , "
Removal and
Installation for Audio Unit" .
Te r m i n a l s
Condi-
tionReference
signal (+) (-)
Con-
nectorTe r m i -
nal
(Wire
color)Con-
nectorTe r m i -
nal
(Wire
color)
M432 (W)
M431 (B)
Receive
audio
signal 4 (Y) 3 (BR)
SKIA4278E
SKIA0177E

AUDIO
AV-39
C
D
E
F
G
H
I
J
L
MA
B
AV
Revision: August 20072004 QX56
2. REAR SPEAKER SIGNAL CHECK
1. Connect BOSE speaker amp. connector M113 and suspect speaker connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal BOSE speaker amp. harness connector M113
terminal with CONSULT-II or oscilloscope.
OK or NG
OK >> Replace suspect speaker. Refer to AV- 4 5 , "Removal
and Installation of Rear Door Speaker" or AV- 4 6 ,
"Removal and Installation of Rear Door Tweeter" .
NG >> GO TO 3.
Te r m i n a l s
Condi-
tionReference
signal (+) (-)
Con-
nec-
torTe r m i n a l
(Wire
color)Con-
nec-
torTe r m i n a l
(Wire
color)
M1139 (SB)
M11310 (B/Y)
Receive
audio
signal 11 (O/L) 12 (R/L)
SKIA4314E
SKIA0177E

AUDIO
AV-41
C
D
E
F
G
H
I
J
L
MA
B
AV
Revision: August 20072004 QX56
4. REAR SPEAKER SIGNAL CHECK
1. Connect audio unit connector M44 and BOSE speaker amp. connector M113.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal at audio unit harness connector M44 terminal
with CONSULT-II or oscilloscope.
OK or NG
OK >> Replace BOSE speaker amp. Refer to AV- 4 6 , "Removal
and Installation of BOSE Speaker Amp." .
NG >> Replace audio unit. Refer to AV- 4 5 , "
Removal and
Installation for Audio Unit" .
Sound Is Not Heard From Center SpeakerEKS007KT
1. HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M112 and center speaker connector M110.
2. Check continuity between BOSE speaker amp. harness connec-
tor terminal M112 center speaker harness connector terminal
M110.
3. Check continuity between BOSE speaker amp. harness connec-
tor M112 terminal and ground.
OK or NG
OK >> GO TO 2.
NG >>

Check connector housings for disconnected or loose terminals.

Repair harness or connector.
Te r m i n a l s
Condi-
tionReference
signal (+) (-)
Con-
nectorTe r m i -
nal
(Wire
color)Con-
nectorTe r m i n a l
(Wire
color)
M4414
(BR)
M4413 (B/R)
Receive
audio
signal
16 (L) 15 (B/W)
SKIA4316E
SKIA0177E
Te r m i n a l s
Continuity BOSE speaker amp. Center speaker
ConnectorTe r m i n a l
(Wire color)ConnectorTe r m i n a l
(Wire color)
M1122 (R)
M110- (R)
Ye s
18 (V) + (V)
Te r m i n a l s
Continuity BOSE speaker amp.
—
Connector Terminal (Wire color)
M1122 (R)
Ground No
18 (V)
WKIA1222E