2006 INFINITI QX56 wiring diagram

EC-628Revision: November 2009
IGNITION SIGNAL
2006 QX56
12. CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between ignition coil terminal 2 and ground. Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 13.
NG >> Repair open circuit or short to power in harness or connectors.
13. CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 46, 60, 61, 62, 65, 79, 80, 81 and ignition coil terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 14.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
14. CHECK IGNITION COIL WITH POWER TRANSISTOR
Refer to EC-628, "
Component Inspection" .
OK or NG
OK >> GO TO 15.
NG >> Replace ignition coil with power transistor.
15. CHECK INTERMITTENT INCIDENT
Refer to EC-144, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Component InspectionUBS00L1D
IGNITION COIL WITH POWER TRANSISTOR
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Disconnect ignition coil harness connector.
3. Check resistance between ignition coil terminals as follows.
4. If NG, replace ignition coil with power transistor.
If OK, go to next step.
5. Turn ignition switch OFF.
6. Reconnect all harness connectors disconnected. Continuity should exist.
Continuity should exist.
Terminal No. (Polarity)
Resistance Ω [at 25 °C (77 °F)]
1 and 2 Except 0 or \b
1 and 3 Except 0
2 and 3
PBIB0847E

REFRIGERANT PRESSURE SENSOREC-631
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Revision: November 2009 2006 QX56
Wiring DiagramUBS00HDI
BBWA1715E

REFRIGERANT PRESSURE SENSOREC-633
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Revision: November 2009 2006 QX56
3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E5, F14

Harness for open or short between ECM and refrigerant pressure sensor
>> Repair harness or connectors.
5. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 3 and ECM terminal 67. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E5, F14

Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
BBIA0445E
Voltage: Approximately 5V
PBIB0188E
Continuity should exist.

EC-634Revision: November 2009
REFRIGERANT PRESSURE SENSOR
2006 QX56
7. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E5, F14

Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK INTERMITTENT INCIDENT
Refer to EC-144, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationUBS00HDK
REFRIGERANT PRESSURE SENSOR
Refer to ATC-182, "Removal and Installation for Refrigerant Pressure Sensor" .
Continuity should exist.

MIL AND DATA LINK CONNECTOREC-635
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Revision: November 2009 2006 QX56
MIL AND DATA LINK CONNECTORPFP:24814
Wiring DiagramUBS00HDX
BBWA2110E

GI-1
GENERAL INFORMATION
A GENERAL INFORMATION
CONTENTS
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SECTION
Revision: November 2009
2006 QX56
PRECAUTIONS .....................................................
..... 3
Description .......................................................... ..... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 3
Precautions for NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS) (If
Equipped) ............................................................ ..... 3
General Precautions ........................................... ..... 4
Precautions for Three Way Catalyst .................... ..... 5
Precautions for Fuel (Unleaded Premium Gasoline
Required) ............................................................ ..... 5
Precautions for Multiport Fuel Injection System or
Engine Control System ....................................... ..... 6
Precautions for Hoses .............................................. 6 HOSE REMOVAL AND INSTALLATION .......... ..... 6
HOSE CLAMPING ................................................ 6
Precautions for Engine Oils ................................. ..... 7
HEALTH PROTECTION PRECAUTIONS ........ ..... 7
Precautions for Air Conditioning .......................... ..... 7
HOW TO USE THIS MANUAL .............................. ..... 8
Description .......................................................... ..... 8
Terms .................................................................. ..... 8
Units .................................................................... ..... 8
Contents .............................................................. ..... 8
Relation between Illustrations and Descriptions . ..... 9
Components ........................................................ ..... 9
SYMBOLS ........................................................ ... 10
How to Follow Trouble Diagnoses ....................... ... 10
DESCRIPTION ................................................. .... 11
HOW TO FOLLOW TEST GROUPS IN TROU-
BLE DIAGNOSES ............................................ ... 12
HARNESS WIRE COLOR AND CONNECTOR
NUMBER INDICATION .................................... ... 12
KEY TO SYMBOLS SIGNIFYING MEASURE-
MENTS OR PROCEDURES ............................ ... 14
How to Read Wiring Diagrams ............................ ... 16
CONNECTOR SYMBOLS ................................ ... 16
SAMPLE/WIRING DIAGRAM - EXAMPL - ...... ... 17DESCRIPTION .................................................
... 18
Abbreviations ....................................................... ... 23
SERVICE INFORMATION FOR ELECTRICAL INCI-
DENT ...................................................................... ... 25
How to Check Terminal ........................................ ... 25
CONNECTOR AND TERMINAL PIN KIT ......... ... 25
HOW TO PROBE CONNECTORS ................... ... 25
How to Perform Efficient Diagnosis for an Electrical
Incident ................................................................ ... 28
WORK FLOW ................................................... ... 28
INCIDENT SIMULATION TESTS ..................... ... 28
CIRCUIT INSPECTION .................................... ... 31
Control Units and Electrical Parts ........................ ... 36
PRECAUTIONS ............................................... ... 36
SMJ INSTALLATION ........................................ ... 37
CONSULT-II CHECKING SYSTEM ....................... ... 38
Description ........................................................... ... 38
Function and System Application ........................ ... 38
Nickel Metal Hydride Battery Replacement ......... ... 39
Checking Equipment ........................................... ... 39
CONSULT-II Start Procedure ............................... ... 39
CONSULT-II Data Link Connector (DLC) Circuit . ... 40
INSPECTION PROCEDURE ........................... ... 40
LIFTING POINT ...................................................... ... 41
Pantograph Jack .................................................. ... 41
Garage Jack and Safety Stand ............................ ... 41
2-Pole Lift ............................................................ ... 42
TOW TRUCK TOWING .......................................... ... 43
Tow Truck Towing ................................................... 43 2WD MODELS .................................................... 43
4WD MODELS .................................................... 44
Vehicle Recovery (Freeing a stuck vehicle) ......... ... 44
TIGHTENING TORQUE OF STANDARD BOLTS . ... 45
Tightening Torque Table ...................................... ... 45
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS ............................................................ ... 46
Recommended Chemical Products and Sealants ... 46
IDENTIFICATION INFORMATION ......................... ... 47
Model Variation .................................................... ... 47
Identification Number ........................................... ... 48

HOW TO USE THIS MANUALGI-11
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Revision: November 2009 2006 QX56
3.Refer to Component Parts and Harness Connector Location for the Systems described in each
section for identification/location of components and harness connectors.
4. Refer to the Circuit Diagram for quick pinpoint check.
If you need to check circuit continuity between harness connectors in more detail, such as when a
sub-harness is used, refer to Wiring Diagram in each individual section and Harness Layout in EL
section for identification of harness connectors.
5. When checking circuit continuity, ignition switch should be OFF.
6. Before checking voltage at connectors, check battery voltage.
7. After accomplishing the Diagnostic Procedures and Electrical Components Inspection, make sure
that all harness connectors are reconnected as they were.
DESCRIPTION
NOTICE:
Trouble diagnoses indicate work procedures required to diagnose problems effectively. Observe the following
instructions before diagnosing.
1.Before performing trouble diagnoses, read the “Preliminary Check”, the “Symptom Chart” or the
“Work Flow”.
2. After repairs, re-check that the problem has been completely eliminated.
3. Refer to Component Parts and Harness Connector Location for the Systems described in each
section for identification/location of components and harness connectors.
4. Refer to the Circuit Diagram for quick pinpoint check.
If you need to check circuit continuity between harness connectors in more detail, such as when a
sub-harness is used, refer to Wiring Diagram in each individual section and Harness Layout in PG
section for identification of harness connectors.
5. When checking circuit continuity, ignition switch should be OFF.
6. Before checking voltage at connectors, check battery voltage.
7. After accomplishing the Diagnostic Procedures and Electrical Components Inspection, make sure
that all harness connectors are reconnected as they were.

GI-16
HOW TO USE THIS MANUAL
Revision: November 20092006 QX56
How to Read Wiring DiagramsEAS001FK
CONNECTOR SYMBOLS
Most of connector symbols in wiring diagrams are shown from the
terminal side.

Connector symbols shown from the terminal side are enclosed
by a single line and followed by the direction mark.

Connector symbols shown from the harness side are enclosed
by a double line and followed by the direction mark.

Certain systems and components, especially related to OBD,
may use a new style slide-locking type harness connector. For
description and how to disconnect, refer to PG-68, "
HARNESS
CONNECTOR" .

Male and female terminals
Connector guides for male terminals are shown in black and
female terminals in white in wiring diagrams.
SGI364
SGI363