2006 INFINITI QX56 ECO mode

DTC P2A00, P2A03 A/F SENSOR 1EC-575
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Revision: November 2009 2006 QX56
DTC P2A00, P2A03 A/F SENSOR 1PFP:22693
Component DescriptionUBS00N7D
The air fuel ratio (A/F) sensor 1 is a planar dual-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is the combination of a
Nernst concentration cell (sensor cell) with an oxygen-pump cell,
which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range (0.7 <
< air).
The exhaust gas components diffuse through the diffusion gap at the
electrode of the oxygen pump and Nernst concentration cell, where
they are brought to thermodynamic balance.
An electronic circuit controls the pump current through the oxygen-
pump cell so that the composition of the exhaust gas in the diffusion
gap remains constant at = 1. Therefore, the A/F sensor 1 is able to
indicate air/fuel ratio by this pumping of current. In addition, a heater
is integrated in the sensor to ensure the required operating tempera-
ture of 700 - 800 °C (1,292 - 1,472 °F).
CONSULT-II Reference Value in Data Monitor ModeUBS00N7E
Specification data are reference values.
On Board Diagnosis LogicUBS00N7F
To judge the malfunction, the A/F signal computed by ECM from the A/F sensor 1 signal is monitored not to be
shifted to LEAN side or RICH side.
DTC Confirmation ProcedureUBS00N7G
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON and select “SELF-LEARNING CONT ” in “WORK SUPPORT” mode with CON-
SULT-II.
SEF579Z
SEF580Z
MONITOR ITEM CONDITIONSPECIFICATION
A/F SEN1 (B1)
A/F SEN1 (B2)

Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 1.5 V
DTC No. Trouble diagnosis name DTC detecting conditionPossible Cause
P2A00
2A00
(Bank 1) Air fuel ratio (A/F) sensor 1
circuit range/performance

The output voltage computed by ECM from the
A/F sensor 1 signal is shifted to the lean side
for a specified period.

The A/F signal computed by ECM from the A/F
sensor 1 signal is shifted to the rich side for a
specified period.

A/F sensor 1

A/F sensor 1 heater

Fuel pressure

Fuel injector

Intake air leaks
P2A03
2A03
(Bank 2)

EC-582Revision: November 2009
DTC P2A00, P2A03 A/F SENSOR 1
2006 QX56
4. CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT ” in “WORK SUPPORT ” mode with CONSULT-II.
3. Clear the self-learning control coefficient by touching “CLEAR”.
4. Run engine for at least 10 minutes at idle speed. Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF.
3. Disconnect mass air flow sensor harness connector.
4. Restart engine and let it idle for at least 5 seconds.
5. Stop engine and reconnect mass air flow sensor harness con- nector.
6. Make sure DTC P0102 is displayed.
7. Erase the DTC memory. Refer to EC-61, "
HOW TO ERASE
EMISSION-RELATED DIAGNOSTIC INFORMATION" .
8. Make sure DTC P0000 is displayed.
9. Run engine for at least 10 minutes at idle speed. Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?
Ye s o r N o
Yes >> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to EC-288, "DTC
P0171, P0174 FUEL INJECTION SYSTEM FUNCTION" or EC-299, "DTC P0172, P0175 FUEL
INJECTION SYSTEM FUNCTION" .
No >> GO TO 5.
SEF968Y
BBIA0368E

EC-604Revision: November 2009
FUEL PUMP
2006 QX56
FUEL PUMPPFP:17042
DescriptionUBS00HDB
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows
that the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when
the ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.
COMPONENT DESCRIPTION
A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor ModeUBS00HDC
Specification data are reference values.
SensorInput signal to ECMECM FunctionActuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
Fuel pump control Fuel pump relay
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and cranking Operates.
When engine is stopped Stops in 1.5 seconds.
Except as shown above Sto ps.
BBIA0402E
MONITOR ITEMCONDITION SPECIFICATION
FUEL PUMP RLY

For 1 second after turning ignition switch ON

Engine running or cranking ON

Except above conditions
OFF

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

GI-38
CONSULT-II CHECKING SYSTEM
Revision: November 20092006 QX56
CONSULT-II CHECKING SYSTEMPFP:00000
DescriptionEAS001FP

CONSULT-II is a hand-held type tester. When it is connected with a diagnostic connector equipped on the
vehicle side, it will communicate with the control unit equipped in the vehicle and then enable various
kinds of diagnostic tests.

Refer to “CONSULT-II Software Operation Manual ” for more information.
Function and System ApplicationEAS001TO
Diagnostic test
mode Function
ENGINE
A/T
ICC
ABS
AIR BAG
IPDM E/R BCM
AUTO DRIVE POS.
REARVIEW CAMERA
AIR LEVELIZER
ALL MODE AWD/4WD HVAC
NVIS (NATS)
*1
NVIS (NATS BCM OR S/ENT)
*1
Work support This mode enables a technician to adjust some
devices faster and more accurately by following the
indications on CONSULT-II. x - xx - - xxxxx - - -
Self-diagnostic Self-diagnostic can be performed quickly. ----x---------
Self-diagnos-
tic results Self-diagnostic results can be read and erased
quickly.
xxxx - xxx - xxxxx
Trouble diag-
nostic record Current self-diagnostic results and all trouble diagnos-
tic records previously stored can be read.
--- - x---------
Data monitor Input/Output data in the ECM can be read. xxxx - x - xxxxx - -
Data monitor
(spec) Data monitor specification can be read.
x-------------
CAN diagno-
sis support
monitor The communication condition of CAN communication
line can be read.
xxxx - xxx - - xx - -
Active test Diagnostic Test Mode in which CONSULT-II drives
some actuators apart from the ECMs and also shifts
some parameters in a specified range.
x-xx-x-x-x----
Function test This mode can show results of self-diagnosis of ECU
with either “
OK” or “NG ”. For engines, more practical
tests regarding sensors/switches and/or actuators are
available. xx-xx- --- -----
DTC & SRT
confirmation The results of SRT (System Readiness Test) and the
self-diagnosis status/result can be confirmed.
x-------------
DTC work sup-
port The operating condition to confirm Diagnosis Trouble
Codes can be selected.
xx------------
ECM/ECU part
number ECM/ECU part number can be read.
x x x x - - x x x x x x - -
ECU discrimi-
nated No. Classification number of a replacement ECU can be
read to prevent an incorrect ECU from being installed.
----x---------
Passenger air
bag Displays the STATUS (readiness) of the front passen-
ger airbag.
----x---------
Configuration Sets control module parameters to match vehicle
options. ------x-------
PIN read
*2This mode shows the BCM-specific 5-digit code. -------------x
Control unit
initialization
*2All registered ignition key IDs in NATS components
can be initialized and new IDs can be registered. ------------x-

TOW TRUCK TOWINGGI-43
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Revision: November 2009 2006 QX56
TOW TRUCK TOWINGPFP:00000
Tow Truck TowingEAS001FY
WARNING:

Never get under the vehicle while it is supported only by the jack. Always use safety stands to
support the frame when you have to get under the vehicle.

Place wheel chocks at both front and back of the wheels on the ground.
CAUTION:

All applicable State or Provincial (in Canada) laws and local laws regarding the towing operation
must be obeyed.

It is necessary to use proper towing equipment to avoid possible damage during towing opera-
tion. Towing is in accordance with Towing Procedure Manual at dealer.

Always attach safety chains before towing.

When towing, make sure that the transmission, steering system and powertrain are in good order.
If any unit is damaged, dollies must be used.

Never tow an automatic transmission model from the rear
(i.e., backward) with four wheels on the ground as this may
cause serious and expensive damage to the transmission.
2WD MODELS
INFINITI does not recommend towing automatic transmission
equipped vehicles with the drive wheels on the ground.
CAUTION:

When towing with the front wheels on the ground: Turn the
ignition key to the OFF position and move the transmission
selector lever to N (neutral) position, turn the ignition key to
OFF position and secure the steering wheel in a straight
ahead position with a rope or similar device. Never place
the ignition key in the LOCK position. This will result in
damage to the steering lock mechanism.
WAIA0030E
WAIA0031E

GI-44
TOW TRUCK TOWING
Revision: November 20092006 QX56
4WD MODELS
INFINITI does not recommend towing automatic transmission
equipped vehicles with the drive wheels on the ground.
CAUTION:

Never tow 4WD models with any of the wheels on the
ground as this may cause serious and expensive damage
to the transfer case and transmission.
To w i n g P o i n t
CAUTION:
Never tow the vehicle using only the towing points. To avoid
damaging the vehicle body, use proper towing equipment when
towing.
Vehicle Recovery (Freeing a stuck vehicle)EAS001FZ

Tow chains or cables must be attached only to the main structural members of the vehicle or the
towing hooks (if so equipped). Otherwise, the vehicle body will be damaged.

Use the towing hook (if so equipped) only to free a vehicle stuck in sand, snow, mud, etc. Never
tow the vehicle for a long distance using only the towing hook.

The towing hook is under tremendous force when used to free a stuck vehicle. Never pull the hook
at an angle.

Always pull the cable straight out from the front or rear of the vehicle.

Pulling devices should be routed so they do not touch any part of the suspension, steering, brake,
or cooling systems.

Pulling devices such as ropes or canvas straps are not recommended for use in vehicle towing or
recovery.
WARNING:

Stand clear of a stuck vehicle.

Do not spin your tires at high speed. This could cause them to explode and result in serious injury.
Parts of your vehicle could also overheat and be damaged.
WAIA0032E
WAIA0055E

POWER WINDOW SYSTEMGW-51
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Revision: November 2009 2006 QX56
Power Window Serial Link Check Front LH and RHEIS005Y9
1. CHECK BUS OUTPUT SIGNAL
With CONSULT-II
Check door lock and unlock switch ( “LOCK SW DR/AS”, “UNLK SW
DR/AS ”) in DATA MONITOR mode for “MULTI REMOTE ENT” with
CONSULT-II. Refer to BL-27, "
DATA MONITOR" .

When door lock and unlock switch is turned to LOCK

When door lock and unlock switch is turned to UNLOCK
Without CONSULT-II
1. Remove key from ignition switch, and the door of driver side and passenger side is closed.
2. Check the signal between BCM connector and ground with oscilloscope when door lock and unlock switch (front LH and
front RH) is turned “LOCK ” or “UNLOCK ”.
3. Make sure signals which are shown in the figure below can be detected during 10 second just after door lock and unlock switch
(front LH and front RH) is turned “LOCK ” or “UNLOCK ”.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK BCM BUS OUTPUT SIGNAL
Check power window serial link ( “POWER WINDOW DOWN”) in
“ACTIVE TEST ” mode with CONSULT-II. Refer to GW-34, "
ACTIVE
TEST" .
When “ACTIVE TEST ” is executed, is the window of driver side and
passenger side lowered.
OK or NG
OK >> Further inspection is necessary. Refer to GW-35, "Trou-
ble Diagnoses Symptom Chart" .
NG >> Replace BCM. Refer to .BCS-20, "
BCM"
LOCK SW DR/AS : ON
UNLK SW DR/AS : ON
LIIA0172E
ConnectorTerminals (Wire color)
Signal
(+) (-)
M18 22 GroundLIIA0391E
PIIA2344E
PIIA3080E