2011 INFINITI QX56 check engine

DEF-10
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (IPDM E/R)
DIAGNOSIS SYSTEM (IPDM E/R)
Diagnosis DescriptionINFOID:0000000006349776
AUTO ACTIVE TEST
Description
In auto active test, the IPDM E/R sends a drive signal to the following systems to check their operation.
 Oil pressure warning lamp
 Rear window defogger
 Front wiper (LO, HI)
 Parking lamp
 License plate lamp
 Tail lamp
 Side marker lamp
 Front fog lamp
 Headlamp (LO, HI)
 A/C compressor (magnet clutch)
Operation Procedure
CAUTION:
Never perform auto active test in the following conditions.
 Engine is running.
 CONSULT-III is connected.
1. Close the hood and lift the wiper arms from the windshield. (Prevent windshield damage due to wiper
operation)
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield beforehand.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON, and within 20 seconds, pr ess the driver door switch 10 times. Then turn the
ignition switch OFF.
CAUTION:
Close passenger door.
4. Turn the ignition switch ON within 10 seconds. Af ter that the horn sounds once and the auto active test
starts.
CAUTION:
Engine starts when igniti on switch is turned ON while brake pedal is depressed.
5. The oil pressure warning lamp starts blinking when the auto active test starts.
6. After a series of the following operations is repeated 3 times, auto active test is completed.
NOTE:
 When auto active test has to be cancelled halfway through test, turn the ignition switch OFF.
 When auto active test is not activated, door swit ch may be the cause. Check door switch. Refer to DLK-117,
"ComponentFunctionCheck".
Inspection in Auto Active Test
When auto active test is actuated, the following operation sequence is repeated 3 times.
Operation
sequence Inspection location Operation
1 Oil pressure warning lamp Blinks continuously during operation of auto active test
2 Rear window defogger 10 seconds
3 Front wiper LO for 5 seconds → HI for 5 seconds
4 Parking lamp
 License plate lamp
 Tail lamp
 Side marker lamp
 Front fog lamp 10 seconds
Revision: 2010 May2011 QX56

SYSTEM (INTELLIGENT KEY SYSTEM)
DLK-19
< SYSTEM DESCRIPTION >
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DOOR LOCK FUNCTION
DOOR LOCK FUNCTION : System DiagramINFOID:0000000006225841
DOOR LOCK FUNCTION : System DescriptionINFOID:0000000006225842
Only when pressing the door request switch, it is possi ble to lock and unlock the door by carrying the Intelli-
gent Key.
OPERATION DESCRIPTION
 When the BCM detects that each door request switch is pressed, it activates the outside key antenna and
inside key antenna corresponding to the pressed door reques t switch and transmits the request signal to the
Intelligent Key. And then, check that the Intelligent Key is near the door.
 If the Intelligent Key is within the outside key ant enna detection area, it receives the request signal and
transmits the key ID signal to the BCM via remote keyless entry receiver.
 BCM receives the key ID signal and compares it with the registered key ID.
 BCM locks/unlocks each doors (except back door).
 BCM sounds Intelligent Key warning buzzer (lock: 2 ti mes, unlock: 1 time) and blinks hazard warning lamps
(lock: 2 times, unlock: 1 time) at the same time as a reminder.
Key reminder The key reminder buzzer sounds a warning if the door is locked with the key left
inside the vehicle DLK-26
Welcome lightWhen the Intelligent Key is carried, and vehicle doors are approached, the BCM
illuminates interior room lamps and operates heart beat operation of the push-
button ignition switch DLK-26
Warning
If an action that does not meet the operating condition of the Intelligent Key sys-
tem is taken, the buzzer sounds to inform the driver DLK-27
Engine start The engine can be turned on while carrying the Intelligent Key
SEC-12
Interior room lamp control Interior room lamp is controlled according to door lock/unlock state INL-6
Power window Power window can be operated by Intelligent Key button operationPWC-8
Automatic drive positioner Automatic drive positioner system can be operated by door unlock operationADP-11
Panic alarm When Intelligent Key panic alarm button is pressed, horn soundsSEC-18
Function Description Refer
JMKIA5068GB
Revision: 2010 May2011 QX56

SYSTEM (INTELLIGENT KEY SYSTEM)
DLK-27
< SYSTEM DESCRIPTION >
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 When the BCM detects that the Intelligent Key is within the outside key antenna detection area. BCM trans-
mits the request signal to the Intelligent Key and check it is near the door.
 Intelligent Key receives the request signal and transmits the key ID signal to the BCM via remote keyless
entry receiver.
 BCM receives the key ID signal and compares it with the registered key ID.
 BCM illuminates lamps that are set, when key ID verification is OK.
TIMER FUNCTION
BCM can operate welcome light function, using the timer function, for 9 days, after key switch is turned OFF.
The timer function resets when the engine is started
*.Operating period of timer function may differ depending
on battery size.
*: Timer function does not stop if another Intelligent Key that has a different key ID is detected within the inte-
rior antenna detection area, when starting the engine.
OPERATION CONDITION
If the following condition are satisfi ed, welcome light function is operated.
OUTSIDE KEY ANTENNA DETECTION AREA
The outside key antenna detection area of door lock/unlock function
is in the range of approximately 80 cm (31.50 in) surrounding the
driver, passenger door handles (1) and back door handle (2). How-
ever, this operating range depends on the ambient conditions.
WELCOME LIGHT FUNCTION SETTING
Welcome light function operation mode can be changed using CONSULT-III
With CONSULT-III
Refer to DLK-41, "
INTELLIGENT KEY : CONSULT-III F unction (BCM - INTELLIGENT KEY)".
Without CONSULT-III
The welcome light function ON/OFF can be s witched by performing the following operation.
1. Turn ignition switch: OFF →ON
2. Press and hold the driver side door request switch for 5 seconds or more within 20 seconds after turning the ignition switch ON.
3. The switching is complete when combination meter buzzer sounds.
WARNING FUNCTION
WARNING FUNCTION : System DescriptionINFOID:0000000006225851
OPERATION DESCRIPTION
The warning function are as per the following items and are given to the user as warning information and
warnings using combinations of Intelligent Key warning buzzer, combination meter buzzer, KEY warning lamp
and information display in combination meter.
 Intelligent Key system malfunction
 OFF position warning
 P position warning
 ACC warning
Function Operation condition
Welcome light function  All door are closed
 All doors is locked
 Ignition switch: OFF position
 Shift position: P position
 Intelligent Key is outside the vehicle
 Timer function is activated
JMKIA5224ZZ
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (BCM)DLK-41
< SYSTEM DESCRIPTION >
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INTELLIGENT KEY : CONSULT-III Fu nction (BCM - INTELLIGENT KEY)INFOID:0000000006225856
WORK SUPPORT
Monitor item Description
INSIDE ANT DIAGNOSIS This function allows inside key antenna self-diagnosis
LOCK/UNLOCK BY I-KEY Door lock/unlock function by door request switch mode can be changed to operation in this
mode
 On: Operate
 Off: Non-operation
ENGINE START BY I-KEY Engine start function mode can be changed to operation with this mode
 On: Operate
 Off: Non-operation
TRUNK/GLASS HATCH OPEN Buzzer reminder function mode by back door opener switch can be changed to operation with
this mode
 On: Operate
 Off: Non-operation
PANIC ALARM SET Panic alarm button pressing time on Intelligent Key button can be selected from the following
with this mode
 MODE 1: 0.5 sec
 MODE 2: Non-operation
 MODE 3: 1.5 sec
TRUNK OPEN DELAY Back door open button pressing to Intelligent Key button can be selected as per the following
in this mode
 MODE 1: Press and hold
 MODE 2: Press twice
 MODE 3: Press and hold, or press twice
LO- BATT OF KEY FOB WARN Intelligent Key low battery warning mode can be changed to operation with this mode
 On: Operate
 Off: Non-operation
ANTI KEY LOCK IN FUNCTI Key reminder function mode can be changed to operation with this mode
 On: Operate
 Off: Non-operation
HAZARD ANSWER BACK Hazard reminder function mode by door request switch and Intelligent Key button can be se-
lected from the following with this mode
 Lock Only: Door lock operation only
 Unlock Only: Door unlock operation only
 Lock/Unlock: Lock and unlock operation
 Off: Non-operation
ANS BACK I-KEY LOCK Buzzer reminder function (lock operation) mode by door request switch can be selected from
the following with this mode
 Horn Chirp: Sound horn
 Buzzer: Sound Intelligent Key warning buzzer
 Off: Non-operation
ANS BACK I-KEY UNLOCK Buzzer reminder function (unlock operation) mode by door request switch can be changed to
operation with this mode
 On: Operate
 Off: Non-operation
SHORT CRANKING OUTPUT Starter motor can operate during the times below
 70 msec
100 msec
200 msec
CONFIRM KEY FOB ID It can be checked wh ether Intelligent Key ID code is registered or not in this mode
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (BCM)DLK-43
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*: OFF is displayed when brake pedal is depressed while brake switch power supply is OFF.
ACTIVE TEST
S/L LOCK-IPDM Indicates [On/Off] condition of steering lock unit (LOCK)
S/L UNLK-IPDM Indicates [On/Off] condition of steering lock unit (UNLOCK)
S/L RELAY-REQ Indicates [On/Off] condition of steering lock relay
VEH SPEED 1 Display the vehicle speed signal received from combination meter by numerical value [Km/h]
VEH SPEED 2 Display the vehicle spee d signal received from ABS or VDC or TCM by numerical value [Km/h]
DOOR STAT-DR Indicates [LOCK/READY/UNLK] condition of unlock sensor
DOOR STAT-AS Indicates [LOCK/READY/UNLK] condition of passenger side door status
ID OK FLAG Indicates [Set/Reset] condition of key ID
PRMT ENG STRT Indicates [Set/Reset] condition of engine start possibility
PRMT RKE STRT NOTE:
This item is displayed, but cannot be monitored
TRNK/HAT MNTR NOTE:
This item is displayed, but cannot be monitored
RKE-LOCK Indicates [On/Off] condition of LOCK signal from Intelligent Key
RKE-UNLOCK Indicates [On/Off] condition of UNLOCK signal from Intelligent Key
RKE-TR/BD NOTE:
This item is displayed, but cannot be monitored
RKE-PANIC Indicates [On/Off] condition of PANIC button of Intelligent Key
RKE-MODE CHG Indicates [On/Off] condition of MODE CHANGE signal from Intelligent Key
RKE OPE COUN1 When remote keyless entry receiver receives the signal transmitted while operating on Intelli-
gent Key, the numerical value start changing
RKE OPE COUN2 NOTE:
This item is displayed, but cannot be monitored
Monitor Item Condition
Test item Description
BATTERY SAVER This test is able to check interior room lamp operation
 On: Operate
 Off: Non-operation
OUTSIDE BUZZER This test is able to check Intelligent Key warning buzzer operation
 On: Operate
 Off: Non-operation
INSIDE BUZZER This test is able to check warning chime in combination meter operation
 Take Out: Take away warning chime sounds when CONSULT-III screen is touched
 Key: Key warning chime sounds when CONSULT-III screen is touched
 Knob: OFF position warning chime sounds when CONSULT-III screen is touched
 Off: Non-operation
INDICATOR This test is able to check warning lamp operation
 KEY ON: “KEY” Warning lamp illuminates when CONSULT-III screen is touched
 KEY IND: “KEY” Warning lamp blinks when CONSULT-III screen is touched
 Off: Non-operation
INT LAMP This test is able to check interior room lamp operation
 On: Operate
 Off: Non-operation
Revision: 2010 May2011 QX56

DLK-44
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
TRUNK
TRUNK : CONSULT-III Function (BCM - TRUNK)INFOID:0000000006225857
DATA MONITOR
LCD This test is able to check meter display information
 Engine start information displays when “BP N” on CONSULT-III screen is touched
 Engine start information displays when “BP I” on CONSULT-III screen is touched
 Key ID warning displays when “ID NG” on CONSULT-III screen is touched
 Steering lock information displays when “ROTAT” on CONSULT-III screen is touched
 P position warning displays when “SFT P” on CONSULT-III screen is touched
 INSRT: This item is displayed, but cannot be monitored
 BATT: This item is displayed, but cannot be monitored
 Take away through window warning displays
when “NO KY” on CONSULT-III screen is
touched
 Take away warning display when “OUTKEY” on CONSULT-III screen is touched
 OFF position warning display when “LK WN” on CONSULT-III screen is touched
FLASHER This test is able to check security hazard lamp operation
The hazard lamps are activated after “LH/RH/Off” on CONSULT-III screen is touched
P RANGE This test is able to check A/T shift selector power supply
 On: Operate
 Off: Non-operation
ENGINE SW ILLUMI This test is able to check push-button ignition switch illumination operation
Push-ignition switch illumination illuminates when “ON” on CONSULT-III screen is touched
LOCK INDICATOR This test is able to check LOCK indicato
r (push-button ignition switch) operation
 On: Operate
 Off: Non-operation
ACC INDICATOR This test is able to check ACC indicator (push-button ignition switch) operation
 On: Operate
 Off: Non-operation
IGNITION ON IND This test is able to check ON indicator (push-button ignition switch) operation
 On: Operate
 Off: Non-operation
HORN This test is able to check horn operation
 On: Operate
 Off: Non-operation
TRUNK/BACK DOOR NOTE:
This item is displayed, but cannot be used
Test item Description
Monitor Item Contents
PUSH SW Indicates [On/Off] condition of push switch
UNLK SEN -DR Indicates [On/Off] condition of unlock sensor
VEH SPEED 1 Indicates [Km/h] condition of ve hicle speed signal from combination meter
TR/BD OPEN SW Indicates [On/Off] condition of back door opener switch
TRNK/HAT MNTR NOTE:
This item is displayed, but cannot be monitored
RKE-TR/BD NOTE:
This item is displayed, but cannot be monitored
Revision: 2010 May2011 QX56

DLK-210
< SYMPTOM DIAGNOSIS >
SQUEAK AND RATTLE TROUBLE DIAGNOSES
If the noise can be duplicated easily during the test drive, to help identify the source of the noise, try to dupli-
cate the noise with the vehicle stopped by doing one or all of the following:
1) Close a door.
2) Tap or push/pull around the area where the noise appears to be coming from.
3) Rev the engine.
4) Use a floor jack to recreate vehicle “twist”.
5) At idle, apply engine load (electrical load, half-cl utch on M/T models, drive position on A/T models).
6) Raise the vehicle on a hoist and hit a tire with a rubber hammer.
 Drive the vehicle and attempt to duplicate the conditions the customer states exist when the noise occurs.
 If it is difficult to duplicate the noise, drive the v ehicle slowly on an undulating or rough road to stress the
vehicle body.
CHECK RELATED SERVICE BULLETINS
After verifying the customer concern or symptom, chec k ASIST for Technical Service Bulletins (TSBs) related
to that concern or symptom.
If a TSB relates to the symptom, follo w the procedure to repair the noise.
LOCATE THE NOISE AND IDENTIFY THE ROOT CAUSE
1. Narrow down the noise to a general area. To help pi npoint the source of the noise, use a listening tool
(Chassis ear: J-39570, Engine ear and mechanics stethoscope).
2. Narrow down the noise to a more specific area and identify the cause of the noise by:
 Removing the components in the area that is are suspected to be the cause of the noise.
Do not use too much force when removing clips and fasteners, otherwise clips and fastener can be broken
or lost during the repair, resulting in the creation of new noise.
 Tapping or pushing/pulling the component that is are suspected to be the cause of the noise.
Do not tap or push/pull the component with excessive force, otherwise the noise will be eliminated only tem-
porarily.
 Feeling for a vibration by hand by touching the component (s) that is are suspected to be the cause of the
noise.
 Placing a piece of paper between components that are suspected to be the cause of the noise.
 Looking for loose components and contact marks. Refer to DLK-211, "
Inspection Procedure".
REPAIR THE CAUSE
 If the cause is a loose component, tighten the component securely.
 If the cause is insufficient clearance between components:
- Separate components by repositioning or loos ening and retightening the component, if possible.
- Insulate components with a suitable insulator such as urethane pads, foam blocks, felt cloth tape or ure-
thane tape. A Nissan Squeak and Rattle Kit (J-43980) is available through the authorized Nissan Parts
Department.
CAUTION:
Never use excessive force as many components are constructed of plastic and may be damaged.
NOTE:
Always check with the Parts Departm ent for the latest parts information.
The following materials are contained in the Nissan Squeak and Rattle Kit (J-43980). Each item can be
ordered separately as needed.
URETHANE PADS [1.5 mm (0.059 in) thick]
Insulates connectors, harness, etc.
76268-9E005: 100 ×135 mm (3.94 ×5.31 in)/76884-71L01: 60 ×85 mm (2.36 ×3.35 in)/76884-
71L02:15 ×25 mm (0.59 ×0.98 in)
INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.
73982-9E000: 45 mm (1.77 in) thick, 50 ×50 mm (1.97 ×1.97 in)/73982-
50Y00: 10 mm (0.39 in) thick, 50 ×50 mm (1.97 ×1.97 in)
INSULATOR (Light foam block)
80845-71L00: 30 mm (1.18 in) thick, 30 ×50 mm (1.18 ×1.97in)
FELT CLOTHTAPE
Used to insulate where movement does not occu r. Ideal for instrument panel applications.
68370-4B000: 15 ×25 mm (0.59 ×0.98 in) pad/68239-13E00: 5 mm (0.20 in) wide tape roll
The following materials, not found in the kit, can also be used to repair squeaks and rattles.
UHMW (TEFLON) TAPE
Revision: 2010 May2011 QX56

CAB MOUNTING INSULATORDLK-253
< REMOVAL AND INSTALLATION >
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 Remove brake tube from connector (front wheel well LH and RH side). Refer to BR-22, "FRONT :
Exploded View"
Vehicle center side
 Remove A/T control cable from manual lever. Refer to TM-178, "
Removal and Installation".
 Separate parking brake rear cable (LH and RH) from parking brake front cable. Refer to PB-5, "
Removal
and Installation".
 Remove engine room harness connector (frame assembly RH center side). Refer to PG-146, "
Engine
Room Harness"
- Remove harness connector protector.
- Disconnect chassis harness connector from engine room harness connector.
- Remove harness bracket bolt, and then remove engi ne room harness connector from frame assembly.
Vehicle rear side
 Remove EVAP hose (canister side).
 Remove rear final drive breather hose from air breather tube (body side). Refer to DLN-201, "
Removal
and Installation".
 Disconnect body harness connector from chassis harness connectors (frame assembly LH rear side).
Refer to PG-150, "
Body Harness"
6. Set safety stand to frame assembly. Release arm of 2-pole lift.
7. Remove cab mounting insulator bolts.
8. Set arm of 2-pole lift to body side sill portion of body.
9. Slowly lift 2-pole lift.
CAUTION:
 Check that there is no inte rference with the vehicle.
 Check that all connection points are disconnected.
10. Remove cab mounting insulator.
INSTALLATION
Note the following items, and then install in the reverse order of removal.
CAUTION:
 Before starting engine, check oil/fl uid levels including engine coolant and engine oil. If levels are
less than the required quantity, fill to the specified level. Refer to MA-10, "
Fluids and Lubricants".
 Warm up engine thoroughly to check that there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.
Revision: 2010 May2011 QX56