2006 INFINITI QX56 battery

REFRIGERANT LINESATC-181
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AT C
Revision: November 2009 2006 QX56
8. Remove the rear high- and low-pressure pipes bracket bolt (A)
to release the bracket.

Rear blower motor (1)

⇐: Front
9. Remove the rear high- and low-pressure pipes bolt (A) to dis- connect the rear high- and low-pressure pipes from the rear
expansion valve (1).

⇐: Front
CAUTION:
Cap or wrap the joint of the pipes with suitable material
such as vinyl tape to avoid the entry of air.
10. Disconnect the following electrical connectors:

Rear air mix door motor (1)

Rear blower motor resistor (2)

Rear blower motor (3)

⇐ : Front
11. Disconnect the ducts from the rear heater and cooling unit assembly. Refer to ATC-166, "
Components" .
12. Remove the rear heater and cooling unit assembly. CAUTION:
Cap or wrap the joint of the pipes with suitable material such as vinyl tape to avoid the entry of air.
13. Remove the rear high- and low-pressure A/C pipes.
INSTALLATION
Installation is in the reverse order of removal.
Refer to ATC-173, "
Components" .
CAUTION:

Replace the O-ring of the high/low-pressure pipe with a new one, then apply compressor oil to it
when installing it.

After charging refrigerant, check for leaks.
Removal and Installation for Underfloor Rear High- and Low-pressure A/C and
Heater Core Pipes
EJS005Y9
REMOVAL
1. Drain the coolant from the engine cooling system. Refer to CO-10, "Changing Engine Coolant" .
2. Disconnect the battery negative terminal.
3. Disconnect the generator harness.
4. Discharge the refrigerant. Refer to ATC-171, "
HFC-134a (R-134a) Service Procedure" .
WJIA2312E
WJIA2313E
WJIA2314E

AV-22
AUDIO
Revision: November 20092006 QX56
Terminals and Reference Value for Audio UnitEKS00BIB
Terminal
(Wire color) ItemSignal
input/
output Condition
Reference value
(Approx.) Example of symptom
+ – Ignition
switch Operation
2 (W) 1 (B) Audio sound
signal front
LHOutput ON
Receive audio
signal No sound from front
door speaker LH or
tweeter LH.
4 (Y) 3 (BR) Audio sound
signal front
RHOutput ON
Receive audio
signal No sound from front
door speaker RH or
tweeter RH.
5 (G/W) Ground Antenna
signal
Output ON
–More than 10V Poor radio reception.
6 (Y) Ground Battery
powerInput
–– Battery voltageSystem does not
work properly.
7 (BR) Ground Illumination
control sig-
nalInput ON Illumination con-
trol switch is
operated by light-
ing switch in 1st
position. Changes between 0 and 12V
Audio unit illumina-
tion cannot be con-
trolled.
8 (R/L) Ground Illumination
signal
Input OFF Lighting switch is
in 1st position.
Battery voltageAudio unit illumina-
tion does not come
on when lighting
switch is in 1st posi-
tion.
Lighting switch is
OFF.
3V or less
9 –Shield –– – 0VInterference and dis-
tortion heard from
speakers.
10 (V) Ground ACC signal Input ON –Battery voltage System does not
work properly.
12 (G/W) Ground Amp. ON
signalOutput ON
–More than 6.5V Amp. does not work
properly.
14 (BR) 13 (B/R) Audio sound
signal rear
LHOutput ON
Receive audio
signal No sound from rear
door speaker LH or
rear door tweeter LH.
16 (L) 15 (B/W) Audio sound
signal rear
RH
Output ON
Receive audio
signal No sound from rear
door speaker RH or
rear door tweeter
RH.
SKIA0177E
SKIA0177E
SKIA0177E
SKIA0177E

AUDIOAV-25
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AV
Revision: November 2009 2006 QX56
Terminals and Reference Value for BOSE Speaker Amp.EKS00BIC
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.
71 (B) 69 (W) Voice guide
signal
Output ON Press the
"GUIDE/VOICE"
button. Only route guide and
operation guide are
not heard.
72 (W/B) Ground CD eject
signalInput ON Operate EJECT
button 0V
→5V CD will not eject from
audio unit.
73 (Y/B) Ground CD load sig-
nalInput ON
Operate LOAD
button 0V
→5V CD will not load into
audio unit.
Terminal
(Wire color) ItemSignal
input/
output Condition
Reference value
(Approx.) Example of symptom
+ – Ignition
switch Operation
SKIA4402E
SKIA0171J
Terminal
(wire color) ItemSignal
input/
output Condition
Reference value
(Approx.) Example of
symptom
+ – Ignition
switch Operation
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 ON
Receive audio
signal No 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 ON
Receive audio
signal No sound from
rear door speaker
RH or rear door
tweeter RH.
SKIA0177E
SKIA0177E

AUDIOAV-29
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AV
Revision: November 2009 2006 QX56
Terminals and Reference Value for AV SwitchEKS00BIE
Terminal No.
(Wire color) ItemSignal
input/
output Condition
Vo l ta g e
(Approx.) Example of
symptom
+ – Ignition
switch Operation
1 (Y) Ground Battery
power Input OFF
–Battery voltage System does not
work properly.
2 (V) Ground ACC signal Input ACC –Battery voltage System does not
work properly.
3 (R/L) Ground Illumination
signal Input OFF Lighting 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) Ground Illumination
control signal Input ON Illumination 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) Ground Communica-
tion signal (+) Input/
output ON
– System does not
work properly.
7 –Shield
ground –– –
–
8 (LG) Ground Communica-
tion signal (-) Input/
output ON
– System does not
work properly.
12 (R) Ground Remote con-
trol A Input ON Press MODE
switch 0V
Steering wheel
audio controls
do not function.
Press SEEK UP
switch 0.75V
Press VOL UP switch 2V
Except for above 5V
13 (G) Ground Remote con-
trol B Input ON Press POWER
switch 0V
Steering wheel
audio controls
do not function.
Press SEEK
DOWN switch 0.75V
Press VOL DOWN switch 2V
Except for above 5V
14 (L) –Remote con-
trol ground –– –
–Steering wheel
audio controls
do not function.
16 (W/B) Ground CD EJECT
signal Output ON Pressed
0V
CD eject does
not function.
Released 5V
SKIA0175E
SKIA0176E

AV-30
AUDIO
Revision: November 20092006 QX56
Terminals and Reference Value for Satellite Radio Tuner (Factory Installed)EKS00GB2
17 (Y/B) GroundCD LOAD
signal Output ON Pressed
0V
CD load does
not function.
Released 5V
Terminal No.
(Wire color) ItemSignal
input/
output Condition
Voltage
(Approx.) Example of
symptom
+ – Ignition
switch Operation
Te r m i n a l
(Wire color) ItemSignal
input/
output Condition
Voltage
(approx.)
+ – Ignition
switch Operation
22 (R) 21 (G) Audio signal LH Output ON Receive audio signal.
24 (W) 23 (B) Audio signal RH Output ON Receive audio signal.
25 –Shield ––
– –
26 ONApprox. 0 V
28 (L) Ground REQ1
(SAT-AUDIO) Output ON
Set to the satellite radio
mode
29 (O/L) Ground Communication signal
(SAT-AUDIO)
Output ONSet to the satellite radio
mode
30 (W/L) Ground Communication signal
(AUDIO-SAT)
Input ONSet to the satellite radio
mode
32 (Y) GroundBattery power supply
InputOFF
− Battery voltage
36 (V) ACC power supply ACC
37 –Antenna signal –– –
SKIB3609E
SKIB3609E
SKIB3825E
SKIB3824E
SKIB3826E

AUDIOAV-35
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Revision: November 2009 2006 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" .
UnitTerminals Signal name Fuse No.
Audio unit 6
Battery power 31
10 Ignition switch ACC or ON 4
AV switch 1
Battery power 31
2 Ignition switch ACC or ON 4
BOSE speaker amp. 1Battery power 31
Subwoofer 6Battery power 17

AV-36
AUDIO
Revision: November 20092006 QX56
2. POWER SUPPLY CIRCUIT CHECK
1. Disconnect audio unit connector M43, subwoofer connector B72 and BOSE speaker amp. connector M112.
2. Check voltage between the audio unit and ground.
3. Check voltage between subwoofer and ground.
4. Check voltage between BOSE speaker amp. and ground.
OK or NG
OK >> GO TO 3.
NG >>

Check connector housings for disconnected or loose
terminals.

Repair harness or connector.
3. GROUND CIRCUIT CHECK
Check continuity between subwoofer harness connector B72 termi-
nal 5 and BOSE speaker amp. harness connector M112 terminal 17
and ground.
OK or NG
OK >> Inspection End.
NG >>

Check connector housings for disconnected or loose
terminals.

Repair harness or connector.
Unit Terminal No.
OFF ACC ON
(+)
(-)
Connector Terminal
Audio unit M43 6Ground
Battery
voltage Battery
voltage Battery
voltage
10 Ground 0 V Battery
voltage Battery
voltage
SKIA1992E
Unit Terminal No.
OFF ACC ON
(+)
(-)
Connector Terminal
Sub-
woofer B72 6 Ground Battery
voltage Battery
voltage Battery
voltage
WKIA1598E
Unit Terminal No.
OFF ACC ON
(+)
(-)
Connector Terminal
BOSE
speaker
amp. M112 1 Ground
Battery
voltage Battery
voltage Battery
voltage
SKIA4311E
Continuity should exist.
WKIA1599E

AUDIOAV-37
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AV
Revision: November 2009 2006 QX56
Satellite Radio Tuner (Factory Installed) Power and Ground Supply Circuit
Inspection
EKS00GB3
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" .
2. POWER SUPPLY CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner (factory installed) M41 connector.
3. Check voltage between the satellite radio tuner (factory installed) and ground.
OK or NG
OK >> GO TO 3.
NG >>

Check connector housings for disconnected or loose
terminals.

Repair harness or connector.
3. GROUND CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Inspect satellite radio tuner (factory installed) case ground.
3. Disconnect satellite radio tuner (factory installed) connector M41 (A) and audio unit connector M42 (B).
4. Check continuity between satellite radio tuner (factory installed) and audio unit.
OK or NG
OK >> Inspection End.
NG >>

Check connector housings for disconnected or loose
terminals.

Repair harness, connector or satellite radio tuner (factory installed) case ground.
Unit Terminals Signal name Fuse No.
Satellite radio tuner (factory
installed) 32
Battery power 31
36 Ignition switch ACC or ON 6
UnitTerminal No.
OFF ACC ON
(+)
(-)
Connector Terminal
Satellite
radio tuner
(factory
installed) M41
32 Ground
Battery
voltage Battery
voltage Battery
voltage
36 Ground 0V Battery
voltage Battery
voltage
WKIA4539E
Terminals
Continuity
Satellite radio tuner (factory
installed) Audio unit
Connector Terminal Connector Terminal
A: M41 25
B: M42 45
Ye s
26 46
WKIA4540E