2007 INFINITI QX56 fuse

HOW TO USE THIS MANUAL
GI-17
< SERVICE INFORMATION >
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Harness Indication
14 Wire color• This shows a code for the color of the wire.
B = Black
W = White
R = Red
G = Green
L = Blue
Y = Yellow
LG = Light GreenBR = Brown
OR or O = Orange
P = Pink
PU or V (Violet) = Purple
GY or GR = Gray
SB = Sky Blue
CH = Dark Brown
DG = Dark Green
When the wire color is striped, the base color is given first, followed by the stripe color as shown
below:
Example: L/W = Blue with White Stripe
15 Option description • This shows a description of the option abbreviation used on the page.
16 Switch• This shows that continuity exists between terminals 1 and 2 when the switch is in the A posi-
tion. Continuity exists between terminals 1 and 3 when the switch is in the B position.
17 Assembly parts • Connector terminal in component shows that it is a harness incorporated assembly.
18 Cell code• This identifies each page of the wiring diagram by section, system and wiring diagram page
number.
19 Current flow arrow• Arrow indicates electric current flow, especially where the direction of standard flow (vertically
downward or horizontally from left to right) is difficult to follow.
• A double arrow “ ” shows that current can flow in either direction depending on circuit
operation.
20 System branch• This shows that the system branches to another system identified by cell code (section and
system).
21 Page crossing• This arrow shows that the circuit continues to another page identified by cell code.
• The C will match with the C on another page within the system other than the next or preceding
pages.
22 Shielded line • The line enclosed by broken line circle shows shield wire.
23Component box in
wave line• This shows that another part of the component is also shown on another page (indicated by
wave line) within the system.
24 Component name • This shows the name of a component.
25 Connector number• This shows the connector number.
• The letter shows which harness the connector is located in.
•Example: M: main harness. For detail and to locate the connector, refer to PG section "Main
Harness", “Harness Layout”. A coordinate grid is included for complex harnesses to aid in lo-
cating connectors.
26 Ground (GND)• The line spliced and grounded under wire color shows that ground line is spliced at the ground-
ed connector.
27 Ground (GND)• This shows the ground connection. For detailed ground distribution information, refer to
"Ground Distribution" in PG section.
28 Connector views • This area shows the connector faces of the components in the wiring diagram on the page.
29 Common component• Connectors enclosed in broken line show that these connectors belong to the same compo-
nent.
30 Connector color• This shows a code for the color of the connector. For code meaning, refer to wire color codes,
Number 14 of this chart.
31Fusible link and fuse
box• This shows the arrangement of fusible link(s) and fuse(s), used for connector views of "POW-
ER SUPPLY ROUTING" in PG section.
The open square shows current flow in, and the shaded square shows current flow out.
32 Reference area• This shows that more information on the Super Multiple Junction (SMJ) and Joint Connectors
(J/C) exists on the PG section. Refer to "Reference Area" for details. Num-
berItem Description

GI-28
< SERVICE INFORMATION >
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
ough understanding of system operation. Then you will be able to use the appropriate equipment and follow
the correct test procedure.
You may have to simulate vehicle vibrations while testing electrical components. Gently shake the wiring har-
ness or electrical component to do this.
NOTE:
Refer to “How to Check Terminal” to probe or check terminal.
Testing for “Opens” in the Circuit
Before you begin to diagnose and test the system, you should rough sketch a schematic of the system. This
will help you to logically walk through the diagnosis process. Drawing the sketch will also reinforce your work-
ing knowledge of the system.
CONTINUITY CHECK METHOD
The continuity check is used to find an open in the circuit. The digital multimeter (DMM) set on the resistance
function will indicate an open circuit as over limit (no beep tone or no ohms symbol). Make sure to always start
with the DMM at the highest resistance level.
To help in understanding the diagnosis of open circuits, please refer to the previous schematic.
• Disconnect the battery negative cable.
• Start at one end of the circuit and work your way to the other end. (At the fuse block in this example)
• Connect one probe of the DMM to the fuse block terminal on the load side.
• Connect the other probe to the fuse block (power) side of SW1. Little or no resistance will indicate that por-
tion of the circuit has good continuity. If there were an open in the circuit, the DMM would indicate an over
limit or infinite resistance condition. (point A)
• Connect the probes between SW1 and the relay. Little or no resistance will indicate that portion of the circuit
has good continuity. If there were an open in the circuit, the DMM would indicate an over limit or infinite resis-
tance condition. (point B)
• Connect the probes between the relay and the solenoid. Little or no resistance will indicate that portion of the
circuit has good continuity. If there were an open in the circuit, the DMM would indicate an over limit or infi-
nite resistance condition. (point C)
Any circuit can be diagnosed using the approach in the previous example.
VOLTAGE CHECK METHOD
To help in understanding the diagnosis of open circuits please refer to the previous schematic.
In any powered circuit, an open can be found by methodically checking the system for the presence of voltage.
This is done by switching the DMM to the voltage function.
• Connect one probe of the DMM to a known good ground.
• Begin probing at one end of the circuit and work your way to the other end.
• With SW1 open, probe at SW1 to check for voltage.
voltage; open is further down the circuit than SW1.
no voltage; open is between fuse block and SW1 (point A).
• Close SW1 and probe at relay.
voltage; open is further down the circuit than the relay.
no voltage; open is between SW1 and relay (point B).
OPEN A circuit is open when there is no continuity through a section of the circuit.
SHORTThere are two types of shorts.
• SHORT CIRCUITWhen a circuit contacts another circuit and causes the normal resistance to
change.
• SHORT TO GROUND When a circuit contacts a ground source and grounds the circuit.
SGI846-A

SERVICE INFORMATION FOR ELECTRICAL INCIDENT
GI-29
< SERVICE INFORMATION >
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• Close the relay and probe at the solenoid.
voltage; open is further down the circuit than the solenoid.
no voltage; open is between relay and solenoid (point C).
Any powered circuit can be diagnosed using the approach in the previous example.
Testing for “Shorts” in the Circuit
To simplify the discussion of shorts in the system, please refer to the following schematic.
RESISTANCE CHECK METHOD
• Disconnect the battery negative cable and remove the blown fuse.
• Disconnect all loads (SW1 open, relay disconnected and solenoid disconnected) powered through the fuse.
• Connect one probe of the DMM to the load side of the fuse terminal. Connect the other probe to a known
good ground.
• With SW1 open, check for continuity.
continuity; short is between fuse terminal and SW1 (point A).
no continuity; short is further down the circuit than SW1.
• Close SW1 and disconnect the relay. Put probes at the load side of fuse terminal and a known good ground.
Then, check for continuity.
continuity; short is between SW1 and the relay (point B).
no continuity; short is further down the circuit than the relay.
• Close SW1 and jump the relay contacts with jumper wire. Put probes at the load side of fuse terminal and a
known good ground. Then, check for continuity.
continuity; short is between relay and solenoid (point C).
no continuity; check solenoid, retrace steps.
VOLTAGE CHECK METHOD
• Remove the blown fuse and disconnect all loads (i.e. SW1 open, relay disconnected and solenoid discon-
nected) powered through the fuse.
• Turn the ignition key to the ON or START position. Verify battery voltage at the battery + side of the fuse ter-
minal (one lead on the battery + terminal side of the fuse block and one lead on a known good ground).
• With SW1 open and the DMM leads across both fuse terminals, check for voltage.
voltage; short is between fuse block and SW1 (point A).
no voltage; short is further down the circuit than SW1.
• With SW1 closed, relay and solenoid disconnected and the DMM leads across both fuse terminals, check for
voltage.
voltage; short is between SW1 and the relay (point B).
no voltage; short is further down the circuit than the relay.
• With SW1 closed, relay contacts jumped with fused jumper wire check for voltage.
voltage; short is down the circuit of the relay or between the relay and the disconnected solenoid (point C).
no voltage; retrace steps and check power to fuse block.
Ground Inspection
Ground connections are very important to the proper operation of electrical and electronic circuits. Ground
connections are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can
become an unwanted resistance. This unwanted resistance can change the way a circuit works.
Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drasti-
cally affect an electronically controlled circuit. A poor or corroded ground can easily affect the circuit. Even
when the ground connection looks clean, there can be a thin film of rust on the surface.
When inspecting a ground connection follow these rules:
• Remove the ground bolt or screw.
• Inspect all mating surfaces for tarnish, dirt, rust, etc.
SGI847-A

POWER WINDOW SYSTEM
GW-15
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POWER WINDOW SYSTEM
Component Parts and Harness Connector LocationINFOID:0000000003533024
System DescriptionINFOID:0000000003533025
Power is supplied at all time
• from 50A fusible link (letter f, located in the fuse and fusible link box)
• to BCM terminal 70
• through BCM terminal 69
• to main power window and door lock/unlock switch terminal 19
• to power window and door lock/unlock switch RH terminal 10.
With ignition switch in ON or START position, power is supplied
• through 10A fuse (No. 59, located in the fuse and relay box)
• to BCM terminal 38
• through BCM terminal 68
• to main power window and door lock/unlock switch terminal 10.
• to rear power vent window relays (OPEN and CLOSE) terminal 1.
With ignition switch in ON or START position, ground is supplied
• to BCM terminal 67
1. A. Steering column
B. BCM M18, M19, M20 (view with
instrument panel removed)2. A. Main power window and door
lock/unlock switch D7, D8
Power window and door lock/unlock
switch RH D105
B. Front door switch LH B8, RH B108
C. Front power window motor LH D9,
RH D104
D. Front door lock actuator LH (key
cylinder switch) D143. A. Rear power window switch LH
D203, RH D303
B. Rear power window motor LH
D204, RH D304
4. A. Rear power vent window relay
(CLOSE) M89
B. Rear power vent window relay
(OPEN) M875. Rear power vent window switch
R1036. A. Rear power vent window motor
LH B52, RH B150
B. Condenser-3 B119
Condenser-4 B120
LIIA2715E

GW-68
< SERVICE INFORMATION >
REAR WINDOW DEFOGGER
REAR WINDOW DEFOGGER
Component Parts and Harness Connector LocationINFOID:0000000003533066
System DescriptionINFOID:0000000003533067
The rear window defogger system is controlled by BCM (body control module) and IPDM E/R (intelligent
power distribution module engine room).
The rear window defogger operates only for approximately 15 minutes.
Power is supplied at all times
• through 15A fuses (No. 43, 46, and 47 located in the IPDM E/R)
• to rear window defogger relay and heated mirror relay (located in the IPDM E/R)
• through 50A fusible link (letter f, located in the fuse and fusible link box)
• to BCM terminal 70.
With the ignition switch turned to ON or START position, power is supplied
• through ignition switch
• to rear window defogger relay (located in the IPDM E/R)
• through 10A fuse (No. 59, located in the fuse and relay box)
• to BCM terminal 38
• through 10A fuse [No. 8, located in the fuse block (J/B)]
• to front air control terminal 14.
Ground is supplied
• to BCM terminal 67
• to front air control terminal 1
• through body grounds M57, M61 and M79
1. A. Steering column
B. BCM M18, M20 (view with instru-
ment panel removed)2. Front air control M49, M50 3. A. Rear window defogger ground
connector D604
B. Rear window defogger connector
D406
4. IPDM E/R, E120, E122, E124 5. Door mirror LH (door mirror defog-
ger) D4
Door mirror RH (door mirror defog-
ger) D107
LIIA2716E

GW-76
< SERVICE INFORMATION >
REAR WINDOW DEFOGGER
1. Turn ignition switch OFF.
2. Disconnect BCM and front air control.
3. Check continuity between BCM connector M18 terminal 9 and
front air control connector M49 terminal 11.
4. Check continuity between BCM connector M18 terminal 9 and
ground
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK BCM OUTPUT SIGNAL
1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M18 terminal 9 and
ground.
OK or NG
OK >> Replace front air control. Refer to ATC-123, "Removal
and Installation" .
NG >> Replace BCM. Refer to BCS-24, "
BCM" .
Rear Window Defogger Circuit InspectionINFOID:0000000003533078
1.CHECK FUSES
Check if any of the following fuses in IPDM E/R are blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger.
3. Turn ignition switch ON.
4. Check voltage between rear window defogger connector D406
terminal + and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.9 - 11 : Continuity should exist.
9 - Ground : Continuity should not exist.
LIIA2035E
9 - Ground : Approx. 5
WIIA0523E
COMPONENT PARTS AMPERE FUSE NO.
IPDM E/R 15A 46
IPDM E/R 15A 47
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
D406 + GroundRear window defogger
switch ON. Battery voltage
Rear window defogger
switch OFF.0
LIIA0655E

REAR WINDOW DEFOGGER
GW-77
< SERVICE INFORMATION >
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3.CHECK REAR WINDOW DEFOGGER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear window defogger connector
D604 terminal - and ground.
OK or NG
OK >> Check filament. Refer to GW-80, "Filament Check".
• If filament is OK.
Check the condition of the harness and the connector.
• If filament is NG.
Repair filament.
NG >> Repair or replace harness.
4.CHECK REAR WINDOW DEFOGGER RELAY OUTPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R connector E124 terminal 60
and ground.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R".
NG >> Repair or replace harness.
Door Mirror Defogger Power Supply Circuit InspectionINFOID:0000000003533079
1.CHECK FUSE
Check if any of the following fuses in fuse block (J/B) are blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT 2
Check voltage between IPDM E/R connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace IPDM E/R. Refer to PG-28, "
Removal and Installation of IPDM E/R".
3.CHECK DOOR MIRROR DEFOGGER CIRCUIT- - Ground : Continuity should exist.
LIIA0409E
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
E124 60 GroundRear window defogger
switch ON Battery voltage
Rear window defogger
switch OFF0
LIIA2190E
COMPONENT PARTS AMPERE FUSE NO.
IPDM E/R 15A 43
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
E120 23 GroundRear window defogger
switch ON Battery voltage
Rear window defogger
switch OFF0
LIIA0977E

IDX-4
ALPHABETICAL INDEX
Duct and grilles .............................................. ATC-170
DVD - Wiring Diagram ....................................... AV-75
DVD Entertainment System ............................... AV-72
DVD Player ........................................................ AV-73
E
ECM input/output signal ..................... EC-109
, EC-133
ECM power supply ............................. EC-150, EC-475
ECM relay ........................................................ EC-150
ECM/PW - Wiring diagram ............................... EC-476
ECTS - Wiring diagram .................................... EC-220
Electric sunroof .................................................. RF-10
Electric throttle control actuator ......... EC-595, EC-606
Electrical load signal circuit .............................. EC-657
Electrical units location ...................................... PG-65
Electronic ignition (EI) system ........................... EC-27
Engine control circuit diagram ......................... EC-107
Engine control component parts location ........... EC-98
Engine control module (ECM) .......................... EC-479
Engine control system diagram ......................... EC-24
Engine coolant .................................................. CO-10
Engine coolant temperature sensor (ECTS) ... EC-218,
EC-231
Engine fail-safe system ...................................... EC-93
Engine oil ............................................................. LU-8
Engine oil filter replacement ............................. MA-17
Engine oil precautions .......................................... GI-7
Engine oil replacement ..................................... MA-17
Engine removal ................................................. EM-74
Engine room cover ............................................ EM-12
Engine serial number .......................................... GI-50
ETC1 - Wiring diagram .................................... EC-596
ETC2 - Wiring diagram .................................... EC-591
ETC3 - Wiring diagram .................................... EC-602
EVAP canister .................................................... EC-36
EVAP canister purge volume control solenoid valve ....
EC-395
, EC-403
EVAP canister vent control valve ....... EC-410, EC-417
EVAP control system (small leak) diagnosis .. EC-387,
EC-441
, EC-449
EVAP control system pressure sensor .... EC-424, EC-
427, EC-433
EVAP control system purge flow monitoring diagnosis
EC-382
EVAP vapor lines inspection ............................. MA-20
Evaporative emission (EVAP) system ............... EC-33
Evaporator ..................................................... ATC-186
Exhaust manifold .............................................. EM-21
Exhaust system ................................................... EX-3
Exhaust system inspection .................................. EX-3
Expansion valve ............................................. ATC-188
F
F/FOG - Wiring diagram ..................................... LT-56
F/PUMP - Wiring diagram ................................ EC-666
Final drive pre-inspection ................................. FFD-15
Final drive removal and installation .. FFD-12, RFD-13
Flow charts .......................................................... GI-27
Fluid temperature sensor (A/T) ........................ AT-123
Fluids ................................................................ MA-11
Fluorescent leak detector .............................. ATC-189
Fog lamp, front ................................................... LT-54
Fog lamp, front, removal and installation ........... LT-62
Foot lamp ......................................................... LT-111
Freeze frame data ............................... EC-55, EC-121
Front brake solenoid valve ................. AT-139, AT-141
Front bumper ...................................................... EI-13
Front case (Transfer) .......................... TF-149, TF-176
Front combination lamp removal and installation LT-25
Front door ............................. BL-117, BL-121, GW-62
Front Door Trim ................................................... EI-32
Front drive shaft (Transfer) ................. TF-149, TF-176
Front fog lamp .................................................... LT-54
Front fog lamp removal and installation ............. LT-62
Front passenger air bag .................................. SRS-43
Front seat ........................................................... SE-89
Front seat belt ...................................................... SB-3
Front seat belt pre-tensioner ............... SRS-3, SRS-50
Front washer ...................................................... WW-4
Front wiper ......................................................... WW-4
FTS - Wiring diagram ....................................... AT-124
FTTS - Wiring diagram ...................... EC-334, EC-339
Fuel cut control (at no load high engine speed) EC-28
Fuel filter replacement ......................................... FL-5
Fuel gauge ............................................................ DI-5
Fuel injection system (Bank 1) .......... EC-311, EC-322
Fuel injection system (Bank 2) .......... EC-311, EC-322
Fuel injector .................................................... EC-659
Fuel injector and fuel tube ................................. EM-31
Fuel level sensor ................. EC-458, EC-460, EC-462
Fuel line inspection .............................................. FL-4
Fuel precautions ................................................... GI-5
Fuel pressure check .......................................... EC-82
Fuel pressure release ....................................... EC-82
Fuel pump ....................................................... EC-665
Fuel pump and gauge .......................................... FL-5
Fuel system .......................................................... FL-4
Fuel tank ............................................................ FL-10
Fuel tank temperature sensor ........... EC-332, EC-338
Fuel tank vacuum relief valve ........................... EC-36
FUELB1 - Wiring diagram ................. EC-313, EC-324
FUELB2 - Wiring diagram ................. EC-315, EC-326
Fuse ...................................................... PG-17, PG-77
Fuse and fusible link box .................................. PG-77
Fuse block ......................................................... PG-76
Fusible link ............................................ PG-17, PG-77
G
Garage jack and safety stand ............................. GI-42
Gauges ................................................................. DI-5
Generator .......................................................... SC-17
Generic scan tool (GST) ................................. EC-131
Glass ...................................... GW-11, GW-62, GW-65
Glove box lamp ................................................ LT-131
GPS antenna ..................................................... AV-82