Air INFINITI QX56 2004 Factory Service Manual

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-33
C
D
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F
G
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MA
B
AV
Revision: August 20072004 QX56
4. CHECK STEERING SWITCH RESISTANCE
Check resistance between steering switch terminals.
OK or NG
OK >> Inspection End.
NG >> Replace steering switch. Refer to AV- 4 7 , "
Removal and Installation of Steering Wheel Audio Con-
trol Switches" .
AV Switch CheckEKS007KN
1. AV SWITCH SELF-DIAGNOSIS FUNCTION CHECK
1. Perform AV switch self-diagnosis function. Refer to AV- 2 7 , "
AV Switch Self-Diagnosis Function" .
Does AV switch operate normally?
YES >> Inspection End.
NO >> GO TO 2.
2. CHECK AV SWITCH POWER SUPPLY AND GROUND CIRCUIT
1. Check AV switch power supply and ground circuit. Refer to AV-120, "
Power Supply and Ground Circuit
Check for AV Switch" .
OK or NG
YES >> Replace AV switch. Refer to AV-45, "Removal and Installation for AV Switch" .
NO >> Repair malfunctioning part.
Audio Communication Line CheckEKS007KO
1. CHECK AUDIO COMMUNICATION LINE

Start audio communication line check. Refer to AV-126, "Audio Communication Line Check (Between Dis-
play Control Unit and Audio Unit)" .
OK or NG
OK >> Inspection End.
NG >> Replace malfunctioning part.
Terminal Signal name ConditionResistance
(Ω)
(Approx.)
16 17Seek (down) Depress (station) down switch. 165
Power Depress power switch. 0
Volume (down) Depress volume down switch. 652
20 17Seek (up) Depress (station) up switch. 165
Mode Depress mode switch. 0
Volume (up) Depress volume up switch. 652
WKIA3490E

AV-34
AUDIO
Revision: August 20072004 QX56
Sound Is Not Heard From Front Door Speaker or Front TweeterEKS007KR
1. HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M113 and suspect speaker connector.
2. Check continuity between BOSE speaker amp. harness connec-
tor terminal M113 and suspect speaker harness connector ter-
minal.
3. Check continuity between BOSE speaker amp. harness connec-
tor terminal M113 and ground.
OK or NG
OK >> GO TO 2.
NG >>

Check connector housings for disconnected or loose terminals.

Repair harness or connector.
Terminals
Continuity BOSE speaker amp. Speaker or tweeter
ConnectorTe r m i n a l
(Wire color)ConnectorTerminal
(Wire color)
M11313 (L/W)
D12+ (L/W)
Ye s 14 (L/R) - (L/R)
15 (W/B)
D112+ (W/B)
16 (L/B) - (L/B)
13 (L/W)
M109+ (L/W)
14 (L/R) - (L/R)
15 (W/B)
M 111+ (W/B)
16 (L/B) - (L/B)
Te r m i n a l s
Continuity BOSE speaker amp.
—
Connector Terminal (Wire color)
M11313 (L/W)
Ground No 14 (L/R)
15 (W/B)
16 (L/B)
WKIA2018E

AV-36
AUDIO
Revision: August 20072004 QX56
3. HARNESS CHECK
1. Disconnect audio unit connector and BOSE speaker amp. connector.
2. Check continuity between audio unit harness connector terminal
and BOSE speaker amp. harness connector terminal.
3. Check continuity between audio unit harness connector terminal
and ground.
OK or NG
OK >> GO TO 4.
NG >>

Check connector housings for disconnected or loose terminals.

Repair harness or connector.
Te r m i n a l s
Continuity Audio unit BOSE speaker amp.
ConnectorTe r m i n a l
(Wire color)ConnectorTe r m i n a l
(Wire color)
M431 (B)
M11329 (B)
Ye s 2 (W) 30 (W)
3 (BR) 27 (BR)
4 (Y) 28 (Y)
Te r m i n a l s
Continuity Audio unit
—
Connector Terminal (Wire color)
M431 (B)
Ground No 2 (W)
3 (BR)
4 (Y)
SKIA4284E

AV-38
AUDIO
Revision: August 20072004 QX56
Sound Is Not Heard From Rear Door Speaker or Rear Door TweeterEKS007KS
1. HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M113 and suspect speaker connector.
2. Check continuity between BOSE speaker amp. harness connec-
tor terminal M113 and suspect speaker harness connector ter-
minal.
3. Check continuity between BOSE speaker amp. harness connec-
tor M113 terminal and ground.
OK or NG
OK >> GO TO 2.
NG >>

Check connector housings for disconnected or loose terminals.

Repair harness or connector.
Terminals
Continuity BOSE speaker amp. Speaker or tweeter
ConnectorTe r m i n a l
(Wire color)ConnectorTerminal
(Wire color)
M1139 (SB)
D207+ (SB)
Ye s 10 (B/Y) - (B/Y)
11 (O/L)
D307+ (O/L)
12 (R/L) - (R/L)
9 (SB)
D208+ (SB)
10 (B/Y) - (B/Y)
11 (O/L)
D308+ (O/L)
12 (R/L) - (R/L)
Te r m i n a l s
Continuity BOSE speaker amp.
—
Connector Terminal (Wire color)
M1139 (SB)
Ground No 10 (B/Y)
11 (O/L)
12 (R/L)
WKIA1635E

AV-40
AUDIO
Revision: August 20072004 QX56
3. HARNESS CHECK
1. Disconnect audio unit connector M44 and BOSE speaker amp. connector M113.
2. Check continuity between audio unit harness connector M44 ter-
minal and BOSE speaker amp. harness connector M113 termi-
nal.
3. Check continuity between audio unit harness connector terminal
and ground.
OK or NG
OK >> GO TO 4.
NG >>

Check connector housings for disconnected or loose terminals.

Repair harness or connector.
Te r m i n a l s
Continuity Audio unit BOSE speaker amp.
ConnectorTe r m i n a l
(Wire color)ConnectorTe r m i n a l
(Wire color)
M4413 (B/R)
M11325 (B/R)
Ye s 14 (BR) 26 (BR)
15 (B/W) 23 (B/W)
16 (L) 24 (L)
Te r m i n a l s
Continuity Audio unit
—
Connector Terminal (Wire color)
M4413 (B/R)
Ground No 14 (BR)
15 (B/W)
16 (L)
SKIA4315E

AUDIO
AV-41
C
D
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F
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H
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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

AV-42
AUDIO
Revision: August 20072004 QX56
2. CENTER SPEAKER SIGNAL CHECK
1. Connect BOSE speaker amp. connector M112 and center speaker connector M110.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal BOSE speaker amp. harness connector M112
terminal with CONSULT-II or oscilloscope.
OK or NG
OK >> Replace center speaker. Refer to AV- 4 6 , "Removal and Installation of Center Speaker" .
NG >> Replace BOSE speaker amp. Refer to AV-46, "
Removal and Installation of BOSE Speaker Amp."
.
Sound Is Not Heard From SubwooferEKS007KU
1. CHECK FUSE

Check that the following fuse is 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" .
2. POWER SUPPLY CIRCUIT CHECK
1. Disconnect subwoofer connector.
2. Check voltage between the subwoofer and ground.
OK or NG
OK >> GO TO 3.
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-
nec-
torTe r m i n a l
(Wire
color)Con-
nec-
torTerminal
(Wire
color)
M112 18 (V) M112 2 (R)Receive
audio
signal
WKIA1223E
SKIA0177E
Unit Terminal Signal name Fuse No.
Subwoofer 6 Battery power 17
UnitTe r m i n a l N o .
OFF ACC ON (+)
(-)
ConnectorTe r m i n a l
(wire color)
Sub-
wooferB72 6 (R) GroundBattery
voltageBattery
voltageBattery
voltage
WKIA1601E

AUDIO
AV-43
C
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B
AV
Revision: August 20072004 QX56
3. GROUND CIRCUIT CHECK
Check continuity between subwoofer harness connector B72 termi-
nal 5 (B) and ground.
OK or NG
OK >> GO TO 4.
NG >>

Check connector housings for disconnected or loose
terminals.

Repair harness or connector.
4. CHECK SUBWOOFER AMP. ON SIGNAL
1. Operate system and check voltage between subwoofer harness
connector B72 terminal 4 (W/G) and ground.
OK or NG
OK >> GO TO 5.
NG >>

Check connector housings for disconnected or loose
terminals.

Repair harness or connector.
5. HARNESS CHECK
1. Disconnect BOSE speaker amp. connector and subwoofer connectors.
2. Check continuity between BOSE speaker amp. harness connec-
tor terminal and subwoofer harness connector harness connec-
tor terminal.
3. Check continuity between BOSE speaker amp. harness connec-
tor terminal and ground.
OK or NG
OK >> GO TO 6.
NG >>

Check connector housings for disconnected or loose terminals.

Repair harness or connector. Continuity should exist.
WKIA1602E
Voltage : More than approx. 6.5V
WKIA2078E
Te r m i n a l s
Continuity BOSE speaker amp. Subwoofer
ConnectorTe r m i n a l
(Wire color)ConnectorTerminal
(Wire color)
M1123 (B) B72 1 (B)
Ye s
19 (W) B72 2 (W)
Terminals
Continuity BOSE speaker amp.
—
Connector Terminal (Wire color)
M1123 (B)
Ground No
19 (W)
WKIA1604E

AV-50
AUDIO ANTENNA
Revision: August 20072004 QX56
Location of AntennaEKS007L8
Window Antenna RepairEKS007L9
ELEMENT CHECK
1. Attach probe circuit tester (ohm setting) to antenna terminal on
each side.

When measuring continuity, wrap tin foil around the top of
probe. Then, press the foil against the wire with your finger.
WKIA1800E
SEL250I
SEL122R