2008 INFINITI QX56 lock

THIRD SEATSE-85
< DISASSEMBLY AND ASSEMBLY >
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Third seat RH
ALIIA0070GB
1. Headrest 2. Headrest holder, locking 3. Headrest holder, free
4. Seatback board 5. Seatback pad 6. Seatback frame assembly
7. Seatback cushion 8. Seatback trim cover 9. RH hinge cover
10. Seat motor/hinge assembly 11. Seat cushion 12. Seat cushion trim cover
13. Front link covers 14. Flex mat 15. Flex mat springs
16. Seat cushion frame assembly 17. Side link cover 18. LH hinge cover
Revision: March 2010 2008 QX56

SEC-2
B2191, P1615 DIFFERENCE OF KEY ..............32
Description ..............................................................32
DTC Logic ...............................................................32
Diagnosis Procedure ..............................................32
B2192, P1611 ID DISCORD, IMMU-ECM .........33
Description ........................................................... ...33
DTC Logic ...............................................................33
Diagnosis Procedure ..............................................33
B2193, P1612 CHAIN OF ECM-IMMU ..............35
Description ........................................................... ...35
DTC Logic ...............................................................35
Diagnosis Procedure ..............................................35
B2194 ID DISCORD IMMU-I-KEY .....................36
Description ........................................................... ...36
DTC Logic ...............................................................36
Diagnosis Procedure ..............................................36
B2552 INTELLIGENT KEY ................................37
Description ........................................................... ...37
DTC Logic ...............................................................37
Diagnosis Procedure ..............................................37
Special Repair Requirement ...................................37
B2590 ID DISCORD BCM-I-KEY .................... ...38
Description ........................................................... ...38
DTC Logic ...............................................................38
Diagnosis Procedure ..............................................38
P1610 LOCK MODE ..........................................39
Description ........................................................... ...39
DTC Logic ...............................................................39
Diagnosis Procedure ..............................................39
POWER SUPPLY AND GROUND CIRCUIT .....40
INTELLIGENT KEY UNIT ...................................... ...40
INTELLIGENT KEY UNIT : Diagnosis Procedure ...40
BCM ........................................................................ ...40
BCM : Diagnosis Procedure ...................................40
KEY CYLINDER SWITCH .................................42
Description ........................................................... ...42
Component Function Check ...................................42
Diagnosis Procedure ..............................................42
IGNITION KNOB SWITCH .................................44
Ignition Knob Switch Check ................................. ...44
HOOD SWITCH .................................................46
Diagnosis Procedure ..............................................46
HORN FUNCTION .............................................48
Symptom Table ................................................... ...48
VEHICLE SECURITY INDICATOR ....................49
Description ........................................................... ...49
Component Function Check .................................49
Diagnosis Procedure ............................................ ...49
ECU DIAGNOSIS .......................................51
BCM (BODY CONTROL MODULE) ............... ...51
Reference Value .................................................. ...51
Terminal Layout ......................................................53
Physical Values .......................................................53
Wiring Diagram - VEHICLE SECURITY SYSTEM ...59
Wiring Diagram - IVIS .............................................70
Fail Safe .................................................................78
DTC Inspection Priority Chart ...............................79
DTC Index ..............................................................79
INTELLIGENT KEY UNIT ..................................81
Reference Value - Intelligent Key Unit ................. ...81
Reference Value - Steering Lock Solenoid .............84
Wiring Diagram - INTELLIGENT KEY SYSTEM/
ENGINE START FUNCTION - ................................
85
Fail Safe .................................................................96
DTC Inspection Priority Chart ...............................97
DTC Index ..............................................................97
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) .................
98
Reference Value .................................................. ...98
Terminal Layout ....................................................100
Physical Values .....................................................100
Wiring Diagram .....................................................105
Fail Safe ...............................................................108
DTC Index ............................................................110
SYMPTOM DIAGNOSIS ...........................111
INTELLIGENT KEY SYSTEM/ENGINE
START FUNCTION SYMPTOMS ................... ..
111
Symptom Table .................................................... .111
VEHICLE SECURITY SYSTEM SYMPTOMS ..112
Symptom Table .....................................................112
NISSAN VEHICLE IMMOBILIZER SYSTEM-
NATS SYMPTOMS ...........................................
113
Symptom Table .................................................... .113
PRECAUTION ...........................................114
PRECAUTIONS .............................................. ..114
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
114
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................
114
ON-VEHICLE REPAIR ..............................116
INTELLIGENT KEY UNIT ............................... ..116
Removal and Installation .......................................116
Revision: March 2010 2008 QX56

SEC-6
< BASIC INSPECTION >[WITH INTELLIGENT KEY SYSTEM]
PRE-INSPECTION FOR DIAGNOSTIC
PRE-INSPECTION
FOR DIAGNOSTIC
Basic InspectionINFOID:0000000004807932
The engine start function, door lock function, power distribution system and NATS-IVIS/ NVIS in the Intelligent
Key system are closely related to each other regarding control. Narrow down the functional area in question
by performing basic inspection to identify which function is malfunctioning. The vehicle security function can
operate only when the door lock and power distribution system are operating normally. Therefore, it is easy to
identify any factor unique to the vehicle security syst em by performing the vehicle security operation check
after basic inspection.
1.CHECK DOOR LOCK OPERATION
Check the door lock for normal operation with the In telligent Key controller and door request switch.
Successful door lock operation with the Intelligent Key and request SW indicates that the remote keyless entry
receiver and inside key antenna required for engine start are functioning normally.
Identify the malfunctioning point by referring to the DLK section if the door cannot be unlocked.
Can the door be locked with the Intelligent Key and door request switch?
YES >> GO TO 2.
NO >> Refer to DLK-200, "
Symptom Table".
2.CHECK ENGINE STARTING
Check that the engine starts when operating with the Intelligent Key.
Does the engine start?
YES >> GO TO 3.
NO >> Refer to S E C - 111 , "
Symptom Table".
3.CHECK STEERING LOCK
Does the steering lock when operating door switch after switching the power supply from ON position (or ACC
position) to LOCK position?
If door switch is malfunctioning, BC M cannot lock the steering. If BCM does not detect DTC, steering lock unit
is normal.
Does steering lock?
YES >> GO TO 4.
NO >> Refer to DLK-67, "
ComponentFunctionCheck".
4.CHECK IGNITION KNOB SWITCH OPERATION
Press ignition knob to check switch operation.
Does the combination meter display any message?
YES >> GO TO 5.
NO >> Refer to SEC-44, "
Ignition Knob Switch Check".
5.CHECK VEHICLE SECURITY SYSTEM
Check the vehicle security system for normal operation.
The vehicle security function can operate only when the door lock and power distribution functions are operat-
ing normally.
Therefore, it is easy to identify any factor unique to the vehicle security by performing the vehicle security
operation check after this basic inspection.
>> Go to SEC-6, "
Vehicle Security Operation Check".
Vehicle Security Operation CheckINFOID:0000000004807933
1.INSPECTION START
Turn ignition switch OFF”.
NOTE:
Before starting operation check, open front windows.
>> GO TO 2.
Revision: March 2010 2008 QX56

PRE-INSPECTION FOR DIAGNOSTICSEC-7
< BASIC INSPECTION > [WITH INTELLIGENT KEY SYSTEM]
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2.CHECK SECURITY INDICATOR LAMP
1. Lock doors using Intelligent Key or mechanical key.
2. Check that security indicator lamp illuminates for 30 seconds.
Does the security indicator lamp illuminate?
YES >> GO TO 3.
NO >> Perform diagnosis and repair. Refer to SEC-49, "
ComponentFunctionCheck".
3.CHECK ALARM FUNCTION
1. After 30 seconds, security indicator lamp will start to blink.
2. Open any door or hood before unlocking with Intelligent Key or mechanical key, or open back door or glass hatch without the presence of Intelligent Key.
Does the alarm function properly?
YES >> GO TO 4.
NO >> Check the following. • The vehicle security system does not phase in alarm mode. Refer to SEC-112, "
Symptom
Table".
• Alarm (horn and headlamps) does not operate. Refer to SEC-112, "
Symptom Table".
4.CHECK ALARM CANCEL OPERATION
Unlock any door using Intelligent Key or mechanical key.
Does alarm (horn and headlamps) stop?
YES >> Inspection End.
NO >> Check door lock function. Refer to DLK-17, "
INTELLIGENT KEY : System Description".
Revision: March 2010 2008 QX56

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTIONSEC-9
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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FUNCTION DIAGNOSIS
INTELLIGENT KEY SYSTEM /ENGINE START FUNCTION
System DiagramINFOID:0000000001539100
System DescriptionINFOID:0000000001539101
INPUT/OUTPUT SIGNAL CHART
Intelligent Key Unit
IPDM E/R
BCM
SYSTEM DESCRIPTION
• The engine start function of Intelligent Key system is a system that makes it possible to start and stop the
engine without using the key. It verifies the electr onic ID using two-way communications when pressing the
ignition knob switch while carrying the Intelligent Key, which operates based on the results of electronic ID
verification for Intelligent Key using two-way communications between the Intelligent Key and the vehicle.
NOTE:
The driver should carry the Intelligent Key at all times.
Switch/Input signal Input signal to
Intelligent Key unit Intelligent Key unit
function Actuator/Output signal
Key switch Mechanical key
(insert/remove)
Engine start function• KEY warning lamp/buzzer
• Steering lock solenoid
• Starter relay requ
est (to IPDM E/R)
• Inside key antenna
(Front and rear center console, over-
head console, luggage compartment)
• Key interlock solenoid
Ignition knob switch
Ignition knob
(push/release)
Steering lock solenoid Steering lock
(lock/unlock)
Inside key antenna
(Front and rear center console, over-
head console, luggage compartment) Intelligent key
(inside antenna detection
area or not.)
Switch/Input signal Input signal to
IPDM E/R IPDM E/R function
Actuator/Output signal
Transmission range switch P, N range Engine start function• Starter relay
• Starter motor
Switch/Input signal Input signal to
BCM BCM function
Actuator/Output signal
Key switch Brake
(press/release)
Engine start function• Inside key antenna
(Front and rear center console, over-
head console, luggage compartment)
ALKIA0925GB
Revision: March 2010 2008 QX56

SEC-10
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
• Intelligent Key has 2 IDs (for Intelligent Key and for
NATS). It can perform the door lock/unlock operation and
the engine start operation when the registered Intelligent Key is carried.
• When the Intelligent Key battery is discharged, it can be used as emergency back-up by inserting the
mechanical key set in the Intelligent Key to the ignition key cylinder. At that time, perform the NATS ID verifi-
cation. If it is used when the Intelligent Key is carried, perform the Intelligent Key ID verification.
• If the ID is successfully verified, and when the igniti on knob switch is pressed, steering lock will be released
and initiating the engine will be possible.
• The door lock/unlock operation can be performed when the Intelligent Key battery is discharged, by operat-
ing the driver door key cylinder using the mechanical key set in the Intelligent Key.
• Up to 4 Intelligent Keys can be registered (including the standard Intelligent Key) on request from the owner. NOTE:
• Refer to DLK-17, "
INTELLIGENT KEY : System Description" for any functions other than engine start func-
tion of Intelligent Key system.
PRECAUTIONS FOR INTELLIGENT KEY SYSTEM
• For vehicles equipped with the Intelligent Key system , the transponder [the chip for NATS ID verifi-
cation] is integrated into the Inte lligent Key. Therefore, the Intellig ent Key alone is capable of provid-
ing security clearance for the engine to start. Also, when the mechanical key alone is inserted into
the key cylinder, performs the NATS ID verification to allow the engine to start. For vehicles without
Intelligent Key system, the transponder is integrated into the mechanical key which must be inserted
into the key cylinder to perform the NATS ID verification to allow the engine to start.
OPERATION WHEN INTELLIGENT KEY IS CARRIED
1. When the ignition knob switch is ON, the Intelligent Key unit transmits the request signal to the Intelligent
Key.
2. The Intelligent Key receives the request signal and transmits the Intelligent Key ID signal to the Intelligent Key unit.
3. The Intelligent Key unit receives the Intelligent Key ID signal and verifies it with the registered ID.
4. Intelligent Key unit transmits the steering lock/unlock signal to steering lock solenoid if the verification results are OK. For detail of key warning message operation, refer to DLK-34, "
System Description".
5. Release of the steering lock.
6. BCM transmits the starter request signal via CAN communication to IPDM E/R and turns the starter relay in IPDM E/R ON if BCM judges that the engine start condition is satisfied.
7. IPDM E/R turns the starter control relay ON when receiving the starter request signal.
8. When shift position is in P or N position, battery power is supplied through the starter relay and operate the starter motor and to start the cranking.
CAUTION:
If a malfunction is detected in the Intelligent Key system, the “KEY” warning message will be dis-
played in the combination meter. At th at time, the engine cannot be started.
OPERATION RANGE
Engine can be started when Intelligent Key is inside the vehicle. However, sometimes engine might not start
when Intelligent Key is on instrument panel or in glove box.
OPERATION WHEN MECHANICAL KEY IS USED
When the Intelligent Key battery is discharged, performs the NATS ID verification between the integrated tran-
sponder and BCM by inserting the mechanical key into the key cylinder, and then the engine can be started.
For details relating to starting the engine using mechanical key, refer to SEC-13, "
System Description".
STEERING LOCK OPERATION
Steering is locked by steering lock solenoid when ignition switch is in the LOCK position (the ignition knob is
released) and key switch is OFF (key is removed from ignition key cylinder).
Revision: March 2010 2008 QX56

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTIONSEC-11
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Component Parts LocationINFOID:0000000001539102
ALKIA0958ZZ
1. BCM M18, M19, M20 (view with instrument panel LH removed) 2. Intelligent Key unit M70
(view with instrument panel LH removed) 3. IPDM E/R
E119, E120, E122, E124
4. ECM E16 5. Key switch and ignition knob switch M12
(view with st eering column removed) 6. Steering lock solenoid M15
7. Remote keyless entry receiver M25 (view with instrume nt panel RH removed) 8. A/T shift selector (detention switch key)
M203
(view with center console removed) 9. Inside key antenna 3 (front of cen-
ter console) M210
(view with center console removed)
Revision: March 2010 2008 QX56

SEC-12
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Component Description
INFOID:0000000001539103
10. Inside key antenna 1 (rear of center con- sole) M209 11. Inside key antenna 4 (overhead console
area) R210
(view with overhead console removed) 12. Inside key antenna 2 (luggage
compartment) B76
(view with rear carpet removed)
13. Intelligent Key warning buzzer E25 14. Combination meter M23, M24 15. Vehicle security indicator lamp
Item Function
Intelligent Key unit Receives lock/unlock signal from remote keyless entry receiver, and then transmits to BCM.
BCM Verifies the received signal from Intelligent Key, then informs ECM whether to allow engine start.
Remote keyless entry receiver Receives lock/unlock signal from th e Intelligent Key, and then transmits to Intelligent Key unit.
Intelligent Key Transmits button operation to remote keyless entry receiver.
Steering lock solenoid Locks the steering wheel when the ignition key is off and the Intelligent Key is outside the vehicle.
Inside key antenna Detects if Intelligent Key is inside the vehicle.
Intelligent Key warning buzzer Warns the user of the lock/unlock condition and inappropriate operations with the buzzer sound.
A/T shift selector (detention key
switch) Detects whether the shift lever is in park.
Revision: March 2010
2008 QX56