ignition INFINITI QX56 2008 Factory Service Manual

AV
REAR DOOR TWEETERAV-93
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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1. Connect AV control unit connector M42 and BOSE speaker amp. connector M113.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between AV control unit harness connector M42 terminals with CONSULT-III or oscilloscope.
Is the audio signal voltage reading as specified?
YES >> Replace BOSE speak er amp. Refer to AV-177,
"Removal and Installation".
NO >> Replace AV control unit. Refer to AV-164, "
Removal and
Installation".
ConnectorTe r m i n a l s
Condition Reference
signal
(+) (-)
M42 45
Receive
audio sig-
nal
13 14
ALNIA0419GB
SKIA0177E
Revision: March 2010
2008 QX56

AV
BACK DOOR SPEAKERAV-95
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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1. Connect BOSE speaker amp. connectors and suspect speaker
connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between BOSE speaker amp. harness connec- tors M113 terminals with CONSULT-III or oscilloscope.
Are audio signal voltage readings as specified?
YES >> Replace suspect speaker. Refer to AV-171, "Removal
and Installation".
NO >> GO TO 3
3.HARNESS CHECK
1. Disconnect AV control unit connector M42 and BOSE speaker
amp. connector M113.
2. Check continuity between AV control unit harness connector
M42 (A) and BOSE speaker amp. harness connector M113 (B).
3. Check continuity between AV control unit harness connector M42 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 4
NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
4.REAR DOOR SPEAKER SIGNAL CHECK
Connector Te r m i n a l s
Condition Reference
signal
(+) (-)
M112 6 7
Receive
audio sig-
nal
M113 37 27
ALNIA0664GB
SKIA0177E
AB

Continuity
Connector Terminal Connector Terminal
M42 4
M113 21
Ye s
52
2
13 23
14 33
A —Con tin uit y
Connector Terminal
M42 4
Ground No
5
13
14
ALNIA0418GB
Revision: March 2010 2008 QX56

AV-96
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
BACK DOOR SPEAKER
1. Connect AV control unit connector M42 and BOSE speaker
amp. connector M113.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between AV control unit harness connector M42 terminals with CONSULT-III or oscilloscope.
Is the audio signal voltage reading as specified?
YES >> Replace BOSE speaker amp. Refer to AV-177,
"Removal and Installation".
NO >> Replace AV control unit. Refer to AV-164, "
Removal and
Installation".
ConnectorTe r m i n a l s
Condition Reference
signal
(+) (-)
M42 45
Receive
audio sig-
nal
13 14
ALNIA0419GB
SKIA0177E
Revision: March 2010
2008 QX56

AV
SUBWOOFERAV-97
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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SUBWOOFER
DescriptionINFOID:0000000001696133
The AV control unit sends audio signals to the BOSE s peaker amp. The BOSE speaker amp. amplifies the
audio signals before sending them to the subwoofer using the audio signal circuits.
Diagnosis ProcedureINFOID:0000000001696134
1.VERIFY SUBWOOFER POWER AND GROUND SUPPLY
Check power and ground supply to the subwoofer. Refer to AV-66, "
WOOFER : Diagnosis Procedure"
Did the power and ground supply check OK?
YES >> GO TO 2
NO >> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
2.HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M112 and sub- woofer connector.
2. Check continuity between BOSE speaker amp. harness connec-
tor M112 (A) and M113 (B) and subwoofer harness connector
B72 (C).
3. Check continuity between BOSE speaker amp. harness connec-
tor M112 (A) and M113 (B) and ground.
Are the continuity test results as specified?
YES >> GO TO 3
NO >> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
3.SUBWOOFER AMP ON SIGNAL CHECK
1. Connect BOSE speaker amp. connector M112.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check voltage between subwoofer connector B72 terminal 4 and ground.
Are the voltage test results as specified?
YES >> GO TO 4
NO >> Replace BOSE speaker amp. Refer to AV-177, "
Removal and Installation".
Connector Terminal Connector Terminal Continuity
A: M112 9
C: B72 2
Ye s
14 1
B: M113 25 4
Connector Terminal -Continuity
A: M112 9
Ground No
14
B: M113 25
ALNIA0365GB
(+)
(-) ACC
Connector Terminal
B72 4 Ground Battery voltage
ALNIA0364GB
Revision: March 2010 2008 QX56

AV-98
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
SUBWOOFER
4.SUBWOOFER AUDIO SIGNAL CHECK
1. Connect BOSE speaker amp. connec tor M112 and subwoofer connector B72.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between BOSE speaker amp. harness connec- tor M112 terminals with CONS ULT-III or oscilloscope.
Is the audio signal voltage as specified?
YES >> Replace subwoofer. Refer to AV-172, "Removal and Installation".
NO >> GO TO 5
5.HARNESS CHECK
1. Disconnect AV control unit connector M42 and BOSE speaker amp. connector M113.
2. Check continuity between AV control unit harness connector M42 (A) and BOSE speaker amp. harness connector M113 (B).
3. Check continuity between AV control unit harness connector M42 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 6
NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
6.REAR DOOR SPEAKER SIGNAL CHECK
Connector Te r m i n a l s
Condition Reference
signal
(+) (-)
M112 9 14 Receive au-
dio signal
ALNIA0366GB
SKIA0177E
AB

Continuity
Connector Terminal Connector Terminal
M42 4
M113 21
Ye s
52
2
13 23
14 33
A —Contin u it y
Connector Terminal
M42 4
Ground No
5
13
14
ALNIA0418GB
Revision: March 2010 2008 QX56

AV
SUBWOOFERAV-99
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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1. Connect AV control unit connector M42 and BOSE speaker amp. connector M113.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between AV control unit harness connector M42 terminals with CONSULT-III or oscilloscope.
Is the audio signal voltage reading as specified?
YES >> Replace BOSE speak er amp. Refer to AV-177,
"Removal and Installation".
NO >> Replace AV control unit. Refer to AV-164, "
Removal and
Installation".
ConnectorTe r m i n a l s
Condition Reference
signal
(+) (-)
M42 45
Receive
audio sig-
nal
13 14
ALNIA0419GB
SKIA0177E
Revision: March 2010
2008 QX56

AV
STEERING SWITCHAV-101
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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STEERING SWITCH
DescriptionINFOID:0000000001696137
When one of the steering wheel audio control switches is pushed, the resistance in the steering wheel audio
control switch circuit changes depending on which button is pushed.
Diagnosis ProcedureINFOID:0000000001696138
1.CHECK STEERING WHEEL AUDI O CONTROL SWITCH RESISTANCE
1. Turn ignition switch OFF.
2. Disconnect steering wheel audio control switch connector M102.
3. Check resistance between steering switch connector terminals.
Do the steering wheel audio control switches check OK?
YES >> GO TO 2
NO >> Replace steering wheel audio control switch. Refer to AV-174, "
Removal and Installation".
2.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector M42 and spiral cable con- nector M30.
3. Check continuity between AV control unit harness connector M42 (A) and spiral cable harness connector M30 (B).
4. Check continuity between AV control unit connector M42 (A) and ground.
Are the continuity results as specified?
YES >> GO TO 3
NO >> Repair harness.
Terminal Signal name Condition Resistance
(Ω )
(Approx.)
16 17 Seek (down)
Depress switch. 165
Volume (down) Depress VOL down switch. 652
Phone/End Depress switch. 0
20 17 Seek (up)
Depress switch. 165
Volume (up) Depress VOL up switch. 652
Phone/Send Depress switch. 0
WKIA4457E
AB
Continuity
Connector Terminal Connector Terminal
M42 6
M30 24
Ye s
15 31
16 32
A —Continuity
Connector Terminal
M42 6
Ground No
15
16
ALNIA0332GB

AV
MICROPHONE SIGNAL CIRCUITAV-103
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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MICROPHONE SIGNAL CIRCUIT
DescriptionINFOID:0000000001696139
Voice signals are transmitted from the microphone to the AV control unit using the microphone signal circuits.
Diagnosis ProcedureINFOID:0000000001696140
1.CHECK HARNESS BETWEEN AV CONTROL UNIT AND MICROPHONE
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and microphone connec- tor.
3. Check continuity between AV control unit harness connector M45 (A) and microphone harness connector R109 (B).
4. Check continuity between AV control unit harness connector M45 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 2
NO >> Repair harness or connector.
2.CHECK MICROPHONE POWER SUPPLY
1. Connect AV control unit connector and microphone connector.
2. Turn ignition switch ON.
3. Check voltage between microphone harness connector R109 terminal 4 and ground.
Is voltage reading approx. 5 volts?
YES >> GO TO 3
NO >> Replace AV control unit. Refer to AV-164, "
Removal and
Installation".
3.CHECK MICROPHONE SIGNAL
AB
Continuity
Connector Terminal Connector Terminal
M45 72
R109 1
Ye s
71 2
70 4
A —Continuity
Connector Terminal
M45 70
GroundNo
71
72
ALNIA0422GB
4 - Ground : Approx. 5V
WKIA5796E
Revision: March 2010 2008 QX56

AV
AV CONTROL UNITAV-105
< ECU DIAGNOSIS > [AUDIO SYSTEM]
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ECU DIAGNOSIS
AV CONTROL UNIT
Reference ValueINFOID:0000000001696141
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III data monitor item
TERMINAL LAYOUT
PHYSICAL VALUES
Display Item Dis-
play Vehicle status
Remarks
VHCL SPD SIG ON Vehicle speed >0 km/h (0 MPH)
Changes in indication may be delayed. This is
normal.
OFF Vehicle speed =0 km/h (0 MPH)
PKB SIG ON Parking brake is applied.
Changes in indication may be delayed. This is
normal.
OFF Parking brake is released.
ILLUM SIG ON
Block the light beam from the auto
light optical sensor when the light
SW is ON.
—
OFF Expose the auto light optical sensor
to light when the light SW is OFF or
ON.
IGN SIG ON Ignition switch ON
—
OFF Ignition switch in ACC position
REV SIG ON Selector lever in R position
Changes in indication may be delayed. This is
normal.
OFF Selector lever in any position other
than R
ALNIA0670GB
Te r m i n a l
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
1
(GR/L) Ground Amp. ON signal
OutputIgnition
switch ON —
Battery voltage
2
(LG) 3
(V) Pre-amp. audio signal front
LH
OutputIgnition
switch ON Audio output
SKIB3609E
Revision: March 2010
2008 QX56

AV-106
< ECU DIAGNOSIS >[AUDIO SYSTEM]
AV CONTROL UNIT
4
(L) 5
(B/W) Pre-amp. audio signal rear
LH
OutputIgnition
switch ON Audio output
6
(Y) 15 Steering switch signal A Input Ignition
switch
ON Pressing switch
0V
Pressing switch 0.75
Pressing VOL up switch 2V
Except for above 5V
7
(V) Ground ACC power supply
InputIgnition
switch ACC −
Battery voltage
9
(R/L) Ground Illumination signal
Input OFFLighting switch is OFF
0V
Lighting switch is ON Battery voltage
10 — Shield — —— —
11
(BR) 12
(B/R) Pre-amp. audio signal front
RH
OutputIgnition
switch ON Audio output
13
(W) 14
(B) Audio signal rear RH Output Ignition
switch
ON Audio output
15 Ground Steering switch signal
ground —Ignition
switch
ON —0
V
16
(G) 15 Steering switch signal B Input Ignition
switch ON Pressing switch
0V
Pressing switch 0.75V
Pressing VOL down switch 2V
Except for above 5V
19
(Y) Ground Battery power supply Input Ignition
switch OFF —
Battery voltage
20
(B) Ground Ground
—Ignition
switch
ON —0
V
Terminal
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
SKIB3609E
SKIB3609E
SKIB3609E
Revision: March 2010 2008 QX56