2011 INFINITI QX56 door

SEC-4
ENGINE DOES NOT START WHEN INTELLI-
GENT KEY IS INSIDE OF VEHICLE ...............
148
Description ........................................................... ..148
Diagnosis Procedure .............................................148
STEERING DOES NOT LOCK ........................149
Description ........................................................... ..149
Diagnosis Procedure .............................................149
SECURITY INDICATOR LAMP DOES NOT
TURN ON OR BLINK .......................................
150
Description ........................................................... ..150
Diagnosis Procedure .............................................150
VEHICLE SECURITY SYSTEM CANNOT BE
SET ..................................................................
151
INTELLIGENT KEY ................................................ ..151
INTELLIGENT KEY : Description ..........................151
INTELLIGENT KEY : Diagnosis Procedure ......... ..151
DOOR REQUEST SWITCH ................................... ..151
DOOR REQUEST SWITCH : Description .............151
DOOR REQUEST SWITCH : Diagnosis Proce-
dure ...................................................................... .
151
DOOR KEY CYLINDER ......................................... .152
DOOR KEY CYLINDER : Description ...................152
DOOR KEY CYLINDER : Dia gnosis Procedure .. .152
VEHICLE SECURITY ALARM DOES NOT
ACTIVATE ...................................................... ..
153
Description ........................................................... .153
Diagnosis Procedure .............................................153
PANIC ALARM FUNCTION DOES NOT OP-
ERATE ..............................................................
154
Description ........................................................... .154
Diagnosis Procedure .............................................154
REMOVAL AND INSTALLATION .............155
NATS ANTENNA AMP. .................................. ..155
Removal and Installation ...................................... .155
PUSH-BUTTON IGNITION SWITCH ................156
Exploded View ..................................................... .156
Removal and Installation .......................................156
Revision: 2010 May2011 QX56

COMPONENT PARTSSEC-7
< SYSTEM DESCRIPTION > [WITH INTELLIGENT KEY SYSTEM]
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006226151
1. Inside key antenna (console) Refer to DLK-11, "
DOOR LOCK
SYSTEM :
ComponentPartsLocation". 2. A/T assembly
Refer to TM-10, "
A/T CONTROL
SYSTEM : Compon ent Parts Loca-
tion". 3. Push-button ignition switch
4. NATS antenna amp. 5. Inside key antenna (instrument cen- ter)
Refer to DLK-11, "
DOOR LOCK
SYSTEM :
ComponentPartsLocation". 6. IPDM E/R
Refer to PCS-4, "
Component Parts
Location".
7. ECM Refer to EC-16, "
Component Parts
Location"). 8. Horn 9. ABS actuator and electric unit (con-
trol unit)
Refer to BRC-10, "Component Parts
Location".
10. Stop lamp switch Refer to EC-16, "
Component Parts
Location". 11 . B C M
Refer to BCS-4, "
BODY CONTROL
SYSTEM : Compon ent Parts Loca-
tion". 12. Combination meter
Refer to MWI-6, "
METER SYSTEM :
Component Parts Location".
JMKIA5243ZZ
Revision: 2010 May2011 QX56

SEC-8
< SYSTEM DESCRIPTION >[WITH INTELLIGENT KEY SYSTEM]
COMPONENT PARTS
Component Description
INFOID:0000000006226152
A/T Shift Selector (Detention Switch)INFOID:0000000006226153
Detention switch detects that A/T sh ift selector is in the P position, and then transmits the signal to BCM and
IPDM E/R.
BCM confirms the A/T shift selector position with the following 5 signals.
 P position signal from A/T shift selector (detention switch)
 P/N position signal from TCM
 P position signal from IPDM E/R (CAN)
 P/N position signal from IPDM E/R (CAN)
 P/N position signal from TCM (CAN)
IPDM E/R confirms the A/T shift select or position with the following 3 signals.
 P position signal from A/T shift selector (detention switch)
 P/N position signal from TCM
 P/N position signal from BCM (CAN)
BCMINFOID:0000000006226154
BCM controls INTELLIGENT KEY SYSTEM (ENGIN E START FUNCTION), INFINITI VEHICLE IMMOBI-
LIZER SYSTEM-NATS [IVIS (NATS)], and VEHICLE SECURITY SYSTEM.
BCM performs the ID verification between BCM and Intelligent Key when the Intelligent Key is carried into the
detection area of inside key antenna, and push-button ignition s witch is pressed. If the ID verification result is
OK, push-button ignition switch operation is available.
13. Front door swit ch (driver side)
Refer to DLK-11, "
DOOR LOCK
SYSTEM :
ComponentPartsLocation". 14. Remote keyless entry receiver
Refer to DLK-11, "
DOOR LOCK
SYSTEM :
ComponentPartsLocation". 15. Inside key antenna (luggage room)
Refer to DLK-11, "
DOOR LOCK
SYSTEM :
ComponentPartsLocation".
A. Behind push-button ignition switch
Component Reference
A/T shift selector (detention switch) SEC-8
BCMSEC-8
ECMSEC-9
IPDM E/RSEC-9
NATS antenna amp.SEC-9
TCMSEC-9
Combination meterSEC-9
Door switchSEC-9
Hood switchSEC-9
Inside key antennaSEC-9
Intelligent KeySEC-9
Push-button ignition switchSEC-10
Remote keyless entry receiverSEC-10
Security indicator lampSEC-10
Starter control relaySEC-10
Starter relaySEC-10
Steering lock relaySEC-10
Steering lock unitSEC-10
Stop lamp switchSEC-10
Transmission range switchSEC-10
Vehicle information display SEC-11
Revision: 2010 May2011 QX56

COMPONENT PARTSSEC-9
< SYSTEM DESCRIPTION > [WITH INTELLIGENT KEY SYSTEM]
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Then, when the power supply position is turned ON, BCM performs ID verification between BCM and ECM. If
the ID verification result is OK, ECM can start engine.
ECMINFOID:0000000006226155
ECM controls the engine.
When power supply position is turned ON, BCM starts communication with ECM and performs the ID verifica-
tion between BCM and ECM.
If the verification result is OK, the engine can start. If the verification result is NG, the engine can not start.
IPDM E/RINFOID:0000000006226156
IPDM E/R has steering lock relay, starter relay and starte r control relay inside. Steering lock relay is used for
the steering lock/unlock function. Starter relay and star ter control relay are used for the engine starting func-
tion. IPDM E/R controls these relays while communicating with BCM.
NATS Antenna Amp.INFOID:0000000006226157
The ID verification is performed between BCM and transponder in Intelligent Key via NATS antenna amp.
when Intelligent Key backside is contacted to push-button i gnition switch in case that Intelligent Key battery is
discharged. If the ID verification result is OK, the release of steering lock and the operation of starting engine
is available.
TCMINFOID:0000000006226158
TCM transmits the shift position signal (P/N position) to BCM and IPDM E/R. And further, TCM transmits the
shift position signal (P/N position) to BCM via CAN communication.
BCM confirms the A/T shift selector position with the following 5 signals.
 P position signal from A/T shift selector (detention switch)
 P/N position signal from TCM
 P position signal from IPDM E/R (CAN)
 P/N position signal from IPDM E/R (CAN)
 P/N position signal from TCM (CAN)
IPDM E/R confirms the A/T shift sele ctor position with the following 3 signals.
 P position signal from A/T shift selector (detention switch)
 P/N position signal from TCM
 P/N position signal from BCM (CAN)
Combination MeterINFOID:0000000006226159
Combination meter transmits the vehicle speed signal to BCM via CAN communication.
BCM also receives the vehicle speed signal from ABS ac tuator and electric unit (control unit) via CAN commu-
nication. BCM compares both signals to detect the vehicle speed.
Door SwitchINFOID:0000000006226160
Door switch detects door open/close condition and then transmits ON/OFF signal to BCM.
Hood SwitchINFOID:0000000006226161
Hood switch detects that hood is open, and then transmits the signal to IPDM E/R. IPDM E/R transmits hood
switch signal to BCM via CAN communication.
Inside Key AntennaINFOID:0000000006226162
Inside key antenna detects whether Intelligent Key is inside the vehicle, and transmits the signal to BCM.
Three inside key antennas are installed in t he instrument center, console and luggage room.
Intelligent KeyINFOID:0000000006226163
Each Intelligent key has an individual electronic ID , and transmits the ID signal by request from BCM.
Carrying the Intelligent Key whose ID is registered in BCM, the driver can performs door lock/unlock operation
and push-button ignition switch operation.
Revision: 2010 May2011 QX56

SEC-12
< SYSTEM DESCRIPTION >[WITH INTELLIGENT KEY SYSTEM]
SYSTEM
SYSTEM
INTELLIGENT KEY SYSTEM
/ENGINE START FUNCTION
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION : System Diagram
INFOID:0000000006226178
INTELLIGENT KEY SYSTEM/ENGINE STAR T FUNCTION : System Description
INFOID:0000000006226179
SYSTEM DESCRIPTION
 The engine start function of Intelligent Key system makes it possible to start and stop the engine without
using the key, based on the electronic ID verification. The electronic ID verification is performed between
BCM and Intelligent Key when the push-button ignition swit ch is pressed while the Intelligent Key is within
the detection area of inside key antenna.
NOTE:
The driver should carry the Intelligent Key at all times.
 Intelligent Key has 2 IDs [Intelligent Key ID and IVIS (NATS) ID]. It can perform the door lock/unlock opera-
tion and the push-button ignition switch operation when the registered Intelligent Key is carried.
 When Intelligent Key battery is discharged, engine c an be started by operating push-button ignition switch
after contacting Intelligent Key backside to push-button igni tion switch. At that time, the IVIS (NATS) ID veri-
fication is performed.
 If the ID is successfully verified, when push-button igni tion switch is pressed, steering lock is released and
the engine can be started.
JMKIA5239GB
Revision: 2010 May2011 QX56

SEC-14
< SYSTEM DESCRIPTION >[WITH INTELLIGENT KEY SYSTEM]
SYSTEM
 When ignition switch is in the OFF position, selector le
ver is in the P position, and any of the following condi-
tions are met.
- Closing door
- Opening door
- Door is locked using door request switch
- Door is locked using Intelligent Key
 When BCM power consumption control system is rel eased by meeting any of the following conditions.
- Opening any door
- Operating door lock using door request switch
- Operating door lock using Intelligent Key
POWER SUPPLY POSITION CHANGE TABLE BY PUSH-BUTTON IGNITION SWITCH OPERA-
TION
The power supply position changing operation can be performed with the following operations.
NOTE:
 When an Intelligent Key is within the detection area of inside key antenna and when Intelligent Key backside
is contacted to push-button ignition switch, it is equivalent to the operations below.
 When starting the engine, the BCM monitors under the engine start conditions,
- Brake pedal operating condition
- Selector lever position
- Vehicle speed
Vehicle speed: less than 4 km/h (2.5 MPH)
Vehicle speed: 4 km/h (2.5 MPH) or more
Emergency stop operation
 Press and hold the push-button ignition switch for 2 seconds or more.
 Press the push-button ignition switch 3 times or more within 1.5 seconds.
INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS
Power supply position Engine start/stop condition
Push-button ignition switch
operation frequency
Selector lever Brake pedal operation
condition
LOCK → ACC — Not depressed 1
LOCK → ACC → ON — Not depressed 2
LOCK → ACC → ON → OFF — Not depressed 3
LOCK → START
ACC → START
ON → START P or N position Depressed 1
Engine is running → OFF — — 1
Power supply position Engine start/stop condition
Push-button ignition switch
operation frequency
Selector lever Brake pedal operation
condition
Engine is running → ACC — — Emergency stop operation
Engine stall return operation while
driving N position Not depressed 1
Revision: 2010 May2011 QX56

SEC-18
< SYSTEM DESCRIPTION >[WITH INTELLIGENT KEY SYSTEM]
SYSTEM
VEHICLE SECURITY SYSTEM : System Description
INFOID:0000000006226185
 The vehicle security system has two alarm functions (theft warning alarm and panic alarm), and reduces the
possibility of a theft or mischief by activating horns and headlamps intermittently.
 The panic alarm does not start when the theft warning alarm is activating, and the panic alarm stops when
the theft warning alarm is activated.
The priority of the functions are as per the following.
THEFT WARNING ALARM
 The theft warning alarm function activates horns and headlamps intermittently when BCM detects that any
door or hood is opened by unauthorized means, whil e the system is in the ARMED state.
 Security indicator lamp on combination meter always blinks when power supply position is any position other
than ON. Security indicator lamp blinking warns that the vehicle is equipped with a vehicle security system.
Operation Flow
Priority Function
1 Theft warning alarm
2 Panic alarm
JMKIA5416GB
No. System state Switching condition
1 DISARMED to PRE-ARMED When all conditions of A and
one condition of B is satis-
fied. AB
 Power supply position: OFF/LOCK
 All doors: Closed
 Hood: Closed All doors are locked by:
 Door key cylinder LOCK switch
 LOCK button of Intelligent Key
 Door request switch
2 PRE-ARMED to ARMED When all of the following
conditions are satisfied for
30 seconds.  Power supply position: OFF/LOCK
 All doors: Locked
 Hood: Closed
3 ARMED to ALARM When one condition of A and
one condition of B are satis-
fied. AB
Intelligent Key: Not used  Any door: Open  Hood: Open
4 DISARMED to PRE-RESET When all conditions of A and
one condition of B is satis-
fied. AB
 Power supply position: OFF/LOCK
 All doors: Closed
 Hood: Open All doors are locked by:
 Door key cylinder LOCK switch
 LOCK button of Intelligent Key
 Door request switch
5 PRE-ARMED to PRE-RESET When one of the following
conditions is satisfied.  Hood: Open
Revision: 2010 May2011 QX56

SYSTEMSEC-19
< SYSTEM DESCRIPTION > [WITH INTELLIGENT KEY SYSTEM]
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NOTE:
 BCM ignores the door key cylinder UNLOCK switch signal input for 1 second after the door key cylinder LOCK switch signal input .
 To lock/unlock all doors by operating remote controller button of Intelligent Key or door request switch, Intelligent Key must be within
the detection area of outside key antenna. For details, refer to DLK-18, "
INTELLIGENT KEY SYSTEM : System Description".
 To open back door by operating back door opener switch, Intelligent Key must be within the detection area of outside key anten na. For
details, refer to DLK-18, "
INTELLIGENT KEY SYSTEM : System Description".
DISARMED Phase
The vehicle security system is not set in the DISARM ED phase. The vehicle security system stays in this
phase while any door is open, because it is assumed that the owner is inside or nearby the vehicle. Security
indicator lamp blinks every 2.4 seconds.
When the vehicle security system is reset, each phase switches to the DISARMED phase directly.
PRE-ARMED Phase
The PRE-ARMED phase is the transient state bet ween the DISARMED phase and the ARMED phase. This
phase is maintained for 30 seconds, so that the owner c an reset the setting due to a mis-operation. This phase
switches to the ARMED phase when vehicle conditions are not changed for 30 seconds. Security indicator
lamp illuminates while being in this phase.
To reset the PRE-ARMED phase, refer to the switching condition of No. 10 in the table above.
ARMED Phase
The vehicle security system is set, and BCM monitors all necessary inputs. If any door or hood is opened with-
out using Intelligent Key, vehicle security system switc hes to the ALARM phase. Security indicator lamp blinks
every 2.4 seconds.
To reset the ARMED phase, refer to the switching condition of No. 11 in the table above.
ALARM Phase
BCM transmits “Theft Warning Horn Request” signal and “High Beam Request” signal intermittently to IPDM
E/R via CAN communication. In this phase, horns and headlamps are activated intermittently for approxi-
mately 50 seconds to warn that the vehicle is accessed by unauthorized means. ON/OFF timing of horns and
headlamps are synchronized. After 50 seconds, the vehi cle security system returns to the ARMED phase. At
6ARMED to
PRE-RESET No conditions.
7 ALARM to PRE-RESET
8 PRE-RESET to DISARMED When one of the following
conditions is satisfied.  Power supply positi
on: ACC/ON/CRANKING/RUN
 Door key cylinder UNLOCK switch: ON
 UNLOCK button of Intelligent Key: ON
 Door request switch: ON
 Back door opener switch: ON
 UNLOCK switch of door lock and unlock switch: ON
 Any door: Open
9 PRE-RESET to PRE-ARMED When all of the following
conditions are satisfied.  Power supply position: OFF/LOCK
 All doors: Closed
 Hood: Closed
10 PRE-ARMED to DISARMED When one of the following
condition is satisfied.  Power supply positi
on: ACC/ON/CRANKING/RUN
 Door key cylinder UNLOCK switch: ON
 UNLOCK button of Intelligent Key: ON
 AUTO BACK DOOR button of Intelligent Key: ON
 Door request switch: ON
 Back door opener switch: ON
 Any door: Open
11 A R M E D t o DISARMED When one of the following
condition is satisfied.  Power supply positi
on: ACC/ON/CRANKING/RUN
 Door key cylinder UNLOCK switch: ON
 UNLOCK button of Intelligent Key: ON
 AUTO BACK DOOR button of Intelligent Key: ON
 Door request switch: ON
 Back door opener switch: ON
12 ALARM to
DISARMED
13 RE-ALARM When one of the following condition is satisfied after the
ALARM operation is finished.  Any door: Open
 Hood: Open
No. System state Switching condition
Revision: 2010 May2011 QX56