2009 INFINITI QX56 fuse diagram

EC-384
< COMPONENT DIAGNOSIS >[VK56DE]
ASCD BRAKE SWITCH
OK or NG
OK >>
INSPECTION END
NG >> GO TO 7.
3.CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON.
4. Check voltage between ASCD brake switch terminal 1 and ground with CONSULT-IIl or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors M31, E152
 Fuse block (J/B) connector M4
 10A fuse
 Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 108 and ASCD brake switch terminal 2. Refer to Wiring Diagram.
CONDITION VOLTAGE
Brake pedal: Fully released Approximately 0V
Brake pedal: Slightly depressed Battery voltage
PBIB1537E
BBIA0373E
Voltage: Battery voltage
PBIB0857E
Continuity should exist.
Revision: December 20092009 QX56

ASCD BRAKE SWITCHEC-385
< COMPONENT DIAGNOSIS > [VK56DE]
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4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK ASCD BRAKE SWITCH
Refer to EC-386, "Component Inspection"
.
OK or NG
OK >> GO TO 11.
NG >> Replace ASCD brake switch.
7.CHECK STOP LAMP SWIT CH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check voltage between stop lamp switch terminal 3 and ground with CONSULT -IIl or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors M31, E152
 Fuse block (J/B) connector M60
 10A fuse
 Harness for open or short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK STOP LAMP SWITCH INPUT SI GNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 4. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
BBIA0373E
Voltage: Battery voltage
PBIB2102E
Continuity should exist.
Revision: December 20092009 QX56

FUEL INJECTOREC-393
< COMPONENT DIAGNOSIS > [VK56DE]
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2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.
4. Check voltage between fuel injector terminal 1 and ground with
CONSULT-IIl or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors E2, F32
 IPDM E/R connector E119
 15A fuse
 Harness for open or short between fuel injector and fuse
>> Repair harness or connectors.
5.CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between fuel injector te rminal 2 and ECM terminals 21, 22, 23, 40, 41, 42, 44,
63.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK FUEL INJECTOR
Refer to EC-394, "Component Inspection"
.
OK or NG
OK >> GO TO 7.
NG >> Replace malfunctioning fuel injector.
7.CHECK INTERMITTENT INCIDENT
Refer to GI-35, "How to Check Terminal"
and GI-38, "Intermittent Incident".
>> INSPECTION END
Voltage: Battery voltage
BBIA0374E
PBIB0582E
Continuity should exist.
Revision: December 20092009 QX56

FUEL PUMPEC-397
< COMPONENT DIAGNOSIS > [VK56DE]
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2. Disconnect 15A fuse.
3. Check 15A fuse.
OK or NG
OK >> GO TO 7.
NG >> Replace fuse.
7.CHECK CONDENSER-2 POWER SUPPLY
CIRCUIT-II FOR OPEN AND SHORT
1. Disconnect IPDM E/R harness connector E119.
2. Check harness continuity between IPDM E/R terminal 13 and condenser-2 terminal 1. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 13.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK CONDENSER-2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between condenser-2
+ terminal 2 and ground.
Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to power in harness or connectors.
9.CHECK CONDENSER-2
Refer to EC-398, "Component Inspection"
.
OK or NG
OK >> GO TO 10.
NG >> Replace condenser-2.
10.CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect “fuel level sensor unit and fuel pump” harness con- nector.
3. Disconnect IPDM E/R harness connector E119.
4. Check harness continuity between IPDM E/R terminal 13 and “fuel level sensor unit and fuel pump” terminal 1, “fuel level sen-
sor unit and fuel pump” terminal 3 and ground.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 .DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors E41, C1
 Harness for open or short between fuel pump and IPDM E/R
 Harness for open or short between fuel pump and ground Continuity should exist.
Continuity should exist.
Continuity should exist.
BBIA0583E
Revision: December 20092009 QX56

EC-402
< COMPONENT DIAGNOSIS >[VK56DE]
ICC BRAKE SWITCH
3. Check voltage between stop lamp switch terminal 3 and ground
with CONSULT -IIl or tester.
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 .DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors M31, E152
 Fuse block (J/B) No. 1 connector M60
 10A fuse
 Harness for open or short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
12.CHECK STOP LAMP SWITCH INPUT SI GNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 4. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 13.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
13.CHECK STOP LAMP SWITCH
Refer to EC-402, "Component Inspection"
.
OK or NG
OK >> GO TO 14.
NG >> Replace stop lamp switch.
14.CHECK INTERMITTENT INCIDENT
Refer to GI-35, "How to Check Terminal"
and GI-38, "Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000003771720
ICC BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ICC brake switch harness connector. Voltage: Battery voltage
PBIB2102E
Continuity should exist.
Revision: December 20092009 QX56

HOW TO READ WIRING DIAGRAMSGI-11
< HOW TO USE THIS MANUAL >
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DescriptionINFOID:0000000003771184
SWITCH POSITIONS
Switches are shown in wiring diagrams as if the vehicle is in the “normal” condition.
A vehicle is in the “normal” condition when:
Number Item Description
1 Power supply • This means the power supply of fusible link or fuse.
2 Fusible link • “X” means the fusible link.
3 Number of fusible link/
fuse • This means the number of fusible link or fuse location.
4 Fuse • “/” means the fuse.
5 Current rating of fus-
ible link/fuse • This means the current rating of the fusible link or fuse.
6 Optional splice • The open circle shows that the splice is optional depending on vehicle application.
7 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-64, "
Elec-
trical Units Location", PG-41, "Harness Layout".
8Splice • The shaded circle “ ” means the splice.
9 Page crossing • This circuit continues to an adjacent page.
10 Option abbreviation • This means the vehicle specifications which layouts the circuit between “ ”.
11 Relay • This shows an internal representation of the relay.
12 Option description • This shows a description of the option abbreviation used on the page.
13 Switch • This shows that continuity exists between terminals 1 and 2 when the switch is in the A
position. Continuity exists between terminals 1 and 3 when the switch is in the B position.
14 Circuit (Wiring) • This means the wiring.
15 System branch • This shows that the circuit is branched to other systems.
16 Shielded line • The line enclosed by broken line circle shows shield wire.
17 Component name • This shows the name of a component.
18 Ground (GND) • This shows the ground connection.
19 Connector • This means the connector information.
• This unit-side is described by the connector symbols.
20 Connectors • This means that a transmission line bypasses two connectors or more.
21 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 Green BR = 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
22 Terminal number • This means the terminal number of a connector.
Revision: December 20092009 QX56

MWI-16
< FUNCTION DIAGNOSIS >
METER SYSTEM
VOLTAGE GAUGE : Component Description
INFOID:0000000003776608
ODO/TRIP METER
ODO/TRIP METER : System DiagramINFOID:0000000003776609
ODO/TRIP METER : System DescriptionINFOID:0000000003776610
The vehicle speed signal and the memory signals from the meter memory circuit are processed by the combi-
nation meter and the mileage is displayed.
HOW TO CHANGE THE DISPLAY FOR ODO/TRIP METER
Refer to Owner's Manual for odo/tr ip meter operating instructions.
ODO/TRIP METER : Component Parts LocationINFOID:0000000003776611
Unit Description
Combination meter Indicates the battery voltage according to the voltage signal received from the fuse block (J/B).
Fuse block (J/B) Transmits the battery voltage signal to the combination meter.
AWNIA0005GB
AWNIA0201ZZ
Revision: December 20092009 QX56

PG
PG-1
ELECTRICAL & POWER CONTROL
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CONTENTS
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
PRECAUTION .......
........................................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
Precaution for Power Generation Variable Voltage
Control System ..........................................................
3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tool ........................................... ......4
Commercial Service Tool ..........................................4
BASIC INSPECTION ....................................5
BATTERY ....................................................... .....5
How to Handle Battery ........................................ ......5
Work Flow ........................................................... ......7
INSPECTION AND ADJUSTMENT .....................8
ADDITIONAL SERVICE WHEN REMOVING BAT-
TERY NEGATIVE TERMINAL ............................... ......
8
ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL : Special Re-
pair Requirement ................................................. ......
8
COMPONENT DIAGNOSIS ..........................9
POWER SUPPLY ROUTING CIRCUIT .......... .....9
Wiring Diagram — Battery Power Supply — ....... ......9
Wiring Diagram — Accessory Power Supply — .....18
Wiring Diagram — Ignition Power Supply — ..........22
Fuse ........................................................................30
Fusible Link ......................................................... ....30
GROUND ...........................................................31
Ground Distribution ..................................................31
HARNESS .........................................................41
Harness Layout ................................................... ....41
ELECTRICAL UNITS LOCATION ....................64
Electrical Units Location ..........................................64
HARNESS CONNECTOR .................................67
Description ...............................................................67
STANDARDIZED RELAY .................................70
Description ...............................................................70
FUSE BLOCK - JUNCTION BOX (J/B) ............72
Terminal Arrangement .............................................72
FUSE, FUSIBLE LINK AND RELAY BOX ........73
Terminal Arrangement .............................................73
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
75
IPDM E/R Terminal Arrangement ............................75
ON-VEHICLE REPAIR .................................76
BATTERY ..........................................................76
Removal and Installation ..................................... ....76
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
77
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
77
Battery ................................................................. ....77
Revision: December 20092009 QX56