2006 INFINITI QX56 immobilizer

TROUBLE DIAGNOSISEC-95
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Revision: November 2009 2006 QX56
1 - 6: The numbers refer to the order of inspection.Exhaust Exhaust manifold/Tube/Muffler/
Gasket 55555 55 5 EM-21
,
EX-
3Three way catalyst
Lubrica-
tion Oil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil cooler
55555 55 5EM-24
,
LU-
13 , LU-10 ,
LU-11
Oil level (Low)/Filthy oil LU-7
Cooling Radiator/Hose/Radiator filler cap
55555 55 45 CO-14
Thermostat
5CO-21
Water pump CO-19
Water galleryCO-8
Cooling fan5CO-17
Coolant level (Low)/Contami-
nated coolant 5
CO-10
IVIS (INFINITI Vehicle Immobilizer System —
NATS) 11
BL-137
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

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

PRECAUTIONSGI-3
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Revision: November 2009 2006 QX56
PRECAUTIONSPFP:00001
DescriptionEAS001F5
Observe the following precautions to ensure safe and proper servicing. These precautions are not
described in each individual section.
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EAS001F6
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER ”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for NVIS/IVIS (NISSAN/INFINITI VEHICLE IMMOBILIZER SYSTEM -
NATS) (If Equipped)
EAS001TH
NVIS/IVIS (NATS) will immobilize the engine if someone tries to start it without the registered key of NVIS/IVIS
(NATS).
Both of the originally supplied ignition key IDs have been NVIS/IVIS (NATS) registered.
The security indicator is located on the instrument panel. The indicator blinks when the immobilizer system is
functioning.
Therefore, NVIS/IVIS (NATS) warns outsiders that the vehicle is equipped with the anti-theft system.

When NVIS/IVIS (NATS) detects trouble, the security indicator lamp lights up while ignition switch is in
"ON" position.
This lighting up indicates that the anti-theft is not functioning, so prompt service is required.

When servicing NVIS/IVIS (NATS) (trouble diagnoses, system initialization and additional registration of
other NVIS/IVIS (NATS) ignition key IDs), CONSULT-II hardware and CONSULT-II NVIS/IVIS (NATS)
software is necessary.
Regarding the procedures of NVIS/IVIS (NATS) initialization and NVIS/IVIS (NATS) ignition key ID regis-
tration, refer to CONSULT-II operation manual, NVIS/IVIS (NATS).
Therefore, CONSULT-II NVIS/IVIS (NATS) software (program card and operation manual) must be kept
strictly confidential to maintain the integrity of the anti-theft function.

When servicing NVIS/IVIS (NATS) (trouble diagnoses, system initialization and additional registration of
other NVIS/IVIS (NATS) ignition key IDs), it may be necessary to re-register original key identification.
Therefore, be sure to receive all keys from vehicle owner. A maximum of four or five key IDs can be regis-
tered into NVIS/IVIS (NATS).

When failing to start the engine first time using the key of NVIS/IVIS (NATS), start as follows.
1. Leave the ignition key in "ON" position for approximately 5 seconds.
2. Turn ignition key to "OFF" or "LOCK" position and wait approximately 5 seconds.
3. Repeat step 1 and 2 again.
4. Restart the engine while keeping the key separate from any others on key-chain.

CONSULT-II CHECKING SYSTEMGI-39
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Revision: November 2009 2006 QX56
x: Applicable.
*1: IVIS (NATS) [Infiniti Vehicle Immobilizer System (Nissan Anti-Theft System)].
*2: This system is shown with IVIS (NATS) using program card AEN04A-1 or later.
Nickel Metal Hydride Battery Replacement EAS001FR
CONSULT-II contains a nickel metal hydride battery. When replacing the battery obey the following:
WARNING:
Replace the nickel metal hydride battery with Genuine CONSULT-II battery only. Use of another bat-
tery may present a risk of fire or explosion. The battery may present a fire or chemical burn hazard if
mistreated. Do not recharge, disassemble or dispose of in fire.
Keep the battery out of reach of children and discard used battery conforming to the local regulations.
Checking EquipmentEAS001TP
When ordering the below equipment, contact your NISSAN distributor.
CAUTION:

Previous CONSULT-II “I” and “Y” DLC-I and DLC-II cables should NOT be used anymore because
their DDL connector pins can be damaged during cable swapping.

If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self- diagnosis depending on control unit which carries out CAN communication.

If CONSULT-II CONVERTER is not connected with CONSULT-II, the vehicle enters “FAIL SAFE
MODE” which will “LIGHT UP the HEAD LIGHT” and /or “COOLING FAN ROTATING” when CON-
SULT-II is started.
NOTE:

The CONSULT-II must be used in conjunction with a program card.
CONSULT-II does not require loading (Initialization) procedure.

Be sure the CONSULT-II is turned OFF before installing or removing a program card.
CONSULT-II Start ProcedureEAS001TQ
NOTE:
Turning ignition switch off when performing CAN diagnosis could cause CAN memory to be erased.
1. Connect CONSULT-II and CONSULT-II CONVERTER to the data link connector.
Tool name Description
NISSAN CONSULT-II (J-44200)
1. CONSULT-II unit (Tester internal soft: Resident Version 3.4.0) and accessories.
2. Program card UED05C-1 and AEN04A-1 (for NATS) or later, to confirm the best combination
of these software, refer to CONSULT-II Opera-
tion Manual.
3. CONSULT-II CONVERTER.
4. "CONSULT-II pigtail" cable.
SAIA0363E
PAIA0070E

IDX-5
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IDX
ALPHABETICAL INDEX
H
H/AIM - Wiring diagram ...................................... LT-66
H/LAMP - Wiring diagram .................................... LT-9
Handling precautions for plastics ..................... BL-187
Harness connector ............................................ PG-68
Harness layout .................................................. PG-41
Hazard warning lamp ......................................... LT-80
Headlamp ............................................................. LT-5
Headlamp aiming control ................................... LT-66
Headlamp leveler - See Headlamp aiming control . LT-
66
Headlamp removal and installation .................... LT-31
Heated oxygen sensor 2 (bank 1) .... EC-253, EC-264,
EC-277
Heated oxygen sensor 2 (bank 2) .... EC-253, EC-264,
EC-277
Heated oxygen sensor 2 heater (bank 1) ........ EC-163
Heated oxygen sensor 2 heater (bank 2) ........ EC-163
Heated seat ....................................................... SE-84
Heater and cooling unit (Heater core) . ATC-153, ATC-
156
Heater unit (heater core) ............... ATC-153, ATC-156
Height (Dimensions) ........................................... GI-50
HFC134a (R134a) system identification ........... ATC-6
HFC134a (R134a) system precaution ............... ATC-5
HFC134a (R134a) system service procedure ATC-171
HFC134a (R134a) system service tools ......... ATC-14
HFC134a system service equipment precaution ATC-
11
High and low reverse clutch solenoid valve .... AT-151,
AT-153
Homelink universal transceiver ........................ BL-156
Horn ................................................................ WW-55
HORN - Wiring diagram .................................. WW-55
How to erase DTC for OBD system .................. EC-61
HSEAT - Wiring diagram ................................... SE-86
I
IATS - Wiring diagram ..................................... EC-189
ICC - Wiring diagram ....................................... ACS-20
ICC/BS - Wiring diagram ................................. EC-504
ICC/SW - Wiring diagram ................................ EC-489
ICCBOF - Wiring diagram ............................... EC-611
Identification plate .............................................. GI-48
Idle air volume learning ..................................... EC-78
Idle speed .............................................. EC-71, EC-76
Idle speed control (ISC) .................... EC-444, EC-446
Ignition coil .......................................... EM-28, EC-618
Ignition control system .................................... EC-618
Ignition key hole illumination ............................ LT-134
Ignition timing ........................................ EC-71, EC-76
IGNSYS - Wiring diagram ............................... EC-619
ILL - Wiring diagram ......................................... LT-163
Illumination ....................................................... LT-157
In vehicle sensor ........................... ATC-137, ATC-146
In-cabin Microfilter ............................................. MA-21
INJECT - Wiring diagram ................................ EC-599
Injector ............................................................. EC-598
Input clutch solenoid valve ................. AT-139, AT-141
Instrument panel .................................................. IP-10
Intake air temperature sensor ............ EC-188, EC-208
Intake door control linkage adjustment . ATC-85, ATC-
88
Intake door motor ........................... ATC-83, ATC-160
Intake manifold .................................................. EM-17
Intake sensor ................................ ATC-142, ATC-148
Integrated homelink transmitter - See Homelink univer-
sal tranceiver .................................................... BL-156
Intelligent cruise control (ICC) system ............... ACS-6
Interior ................................................................. EI-35
Interior lamp ...................................................... LT-134
Interior lamp on-off control ................................ LT-135
Internal gear (Transfer) ....................... TF-149, TF-176
IPDM (Intelligent power distribution module engine
room) ................................................................. PG-18
IVIS (Infiniti vehicle immobilizer system) .......... BL-137
IVIS (Infiniti vehicle immobilizer system) precautions ...
GI-3
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Jacking points ..................................................... GI-41
Junction box (J/B) .............................................. PG-76
K
Key illumination ................................................ LT-135
KEYLES - Wiring diagram .................................. BL-49
Knock sensor (KS) ........................................... EC-335
KS - Wiring diagram ........................................ EC-336
L
Laser beam aiming adjustment ....................... ACS-12
Length (Dimensions) .......................................... GI-50
License lamp .................................................... LT-111
Lifting points ....................................................... GI-42
Line pressure solenoid valve ........................... AT-122
Line pressure switch (Transfer) .......... TF-154, TF-167
Line pressure test (A/T) ..................................... AT-52
Location of electrical units ................................. PG-65
Low coast brake solenoid valve .......... AT-155, AT-157
Low tire pressure warning system ...................... WT-8
Low tire pressure warning system - trouble diagnoses
WT-11
Low tire pressure warning system - Wiring diagram .....
WT-11
Lubricant (R134a) A/C ..................................... ATC-22
Lubricants .......................................................... MA-11
Lubrication circuit (engine) .................................. LU-5
Lubrication oil A/C ........................................... ATC-22
Lubrication-locks, hinges and hood latches ....... MA-31
M
MAFS - Wiring diagram ..................... EC-174
, EC-182

IDX-6
ALPHABETICAL INDEX
Magnet clutch ............................... ATC-115, ATC-176
MAIN - Wiring diagram ...................... EC-145, AT-167
Main oil pump (Transfer) ..................... TF-154, TF-167
Mainshaft (Transfer) ........................... TF-154, TF-167
Maintenance (engine)Schedule 1 ....................... MA-7
Maintenance (engine)Schedule 2 ....................... MA-9
Major overhaul (Final drive) ............................. FFD-14
Major overhaul (Transfer) ................................ TF-146
Malfunction indicator lamp (MIL) ........................ EC-63
Map lamp .......................................................... LT-135
Mass air flow sensor (MAFS) ............. EC-171, EC-180
Meter ..................................................................... DI-5
METER - Wiring diagram .................................... DI-10
MIL data link connectors circuit ....................... EC-635
MIL/DL - Wiring diagram .................................. EC-635
MIRROR - Wiring diagram ................................ GW-93
Misfire .............................................................. EC-327
Mode door control linkage adjustment ............. ATC-66
Mode door motor ............................ ATC-64, ATC-161
Model variation ................................................... GI-47
Multiport fuel injection (MFI) system .................. EC-24
Multiport fuel injection precautions ....................... GI-6
Multi-remote control system - See Remote keyless entry
system ............................................................... BL-44
N
NATS - Wiring diagram .................................... BL-140
NAVI - Wiring diagram ....................................... AV-89
NAVI Control Unit .............................................. AV-86
Navigation system ............................................. AV-84
Neutral-4LO switch ............................................ TF-62
NONDTC - Wiring diagram .............................. AT-176
NVH troubleshooting (AX) ................................. FAX-4
NVH troubleshooting (EM) ................................ EM-10
NVH troubleshooting (Final drive) ..................... RFD-7
NVH troubleshooting (Propeller shaft) ................. PR-3
NVH troubleshooting (RAX) .............................. RAX-4
NVH troubleshooting (RSU) .............................. RSU-5
NVH troubleshooting (ST) .................................... PS-5
NVH troubleshooting (Transfer) ......................... TF-10
NVH troubleshooting (WT)NVH troubleshooting (WT) .
WT-4
NVIS (Nissan vehicle immobilizer system) precautions
GI-3
O
O2H2B1 - Wiring diagram ................................ EC-165
O2H2B2 - Wiring diagram ................................ EC-167
O2S2B1 - Wiring diagram ... EC-256, EC-267, EC-280
O2S2B2 - Wiring diagram ... EC-258, EC-269, EC-282
Oil cooler (engine) ............................................. LU-11
Oil filter ............................................................... LU-10
Oil filter (Transfer) ............................................ TF-143
Oil pan (engine) ................................................ EM-24
Oil pressure (engine) ........................................... LU-7
Oil pressure relief valve (engine) ......................... LU-5
Oil pump (engine) .............................................. LU-13
Oil seal replacement (engine) ........................... EM-60
Oil seal replacement (front of final drive) FFD-8, RFD-9
Oil seal replacement (side of final drive) ......... RFD-11
On board diagnostic system ............................. EC-48
ORVR (On-board Refueling Vapor Recovery) .. EC-39
Overheat ......................................................... EC-473
P
P/SCKT - Wiring diagram ................................. WW-53
Pantograph jack .................................................. GI-41
Park/Neutral position switch ............................ EC-465
Parking brake control ........................................... PB-4
PCV (positive crankcase ventilation) ................ EC-45
Periodic maintenance ......................................... MA-7
Personal lamp .................................................. LT-135
PGC/V - Wiring diagram ................... EC-375, EC-383
PHASE - Wiring diagram ................................ EC-349
PHONE - Wiring diagram ................................... AV-67
Pinion bearing preload diff. ............................. RFD-26
Piston pin inspection ......................................... EM-94
Piston ring inspection ........................................ EM-95
Piston to bore clearance ................................... EM-99
Planetary carrier (Transfer) ................. TF-149, TF-176
PNP/SW - Wiring diagram ... EC-467, AT-105, AT-106
POS - Wiring diagram ..................................... EC-342
POWER - Wiring diagram ................................... PG-6
Power door lock ................................................. BL-16
Power seat ......................................................... SE-83
Power steering fluid level .................................. MA-29
Power steering gear ........................................... PS-15
Power steering oil pump .................................... PS-21
Power steering pressure (PSP) sensor ........... EC-448
Power steering system bleeding .......................... PS-6
Power supply routing .......................................... PG-4
Power window .................................................. GW-15
PRE/SE - Wiring diagram ................. EC-407, EC-413
Precautions (General) ........................................... GI-4
Precautions in repairing high strength steel ..... BL-190
Pressure switch 1 ............................... AT-145, AT-159
Pressure switch 2 ............................................. AT-157
Pressure switch 3 ............................... AT-141, AT-161
Pressure switch 5 ............................... AT-149, AT-163
Pressure switch 6 ............................... AT-153, AT-165
Pressure test (A/T) ............................................. AT-52
Propeller shaft ........................................... PR-4, PR-8
Propeller shaft inspection .................................. MA-25
Propeller shaft on vehicle service ....................... PR-8
Propeller shaft vibration ............................ PR-4, PR-8
PS/SEN - Wiring diagram ............................... EC-449
R
R/VIEW - Wiring diagram .................................... DI-76
Radiator ............................................................ CO-14
Rear Audio Remote Control Unit ......................... AV-8
Rear axle ........................................................... RAX-5
Rear bumper ....................................................... EI-15
Rear case (Transfer) ........................... TF-148, TF-181