ignition INFINITI QX56 2008 Factory Service Manual

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

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
SEC-13
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NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
System DiagramINFOID:0000000001539104
System DescriptionINFOID:0000000001539105
INPUT/OUTPUT SIGNAL CHART
Intelligent Key Unit
BCM
SYSTEM DESCRIPTION
NATS (Nissan Anti-Theft System) has the following immobilizer functions:
• Engine immobilizer shows high anti-theft performance to prevent engine from starting by other than the
owner.
• Only a key with key ID registered in BCM and ECM can start engine, and shows high anti-theft performance to prevent key from being copied or stolen.
• Security indicator always flashes with mechanical key removed condition (key switch: OFF) and ignition
knob released condition on LOCK posit ion (ignition knob switch: OFF).
• Therefore, NATS warns outsiders that the vehicl e is equipped with the anti-theft system. Refer to SEC-17,
"System Description".
• If system detects malfunction, security indicator illuminates when ignition switch is turned to ON position.
• If the owner requires, ignition key ID or mechanical key ID can be registered for up to 4 keys.
• During trouble diagnosis or when the following parts have been replaced, and if mechanical key is added, registration* is required.
*1: All keys kept by the owner of the vehi cle should be registered with mechanical key.
-ECM
-BCM
LIIA2537E
Switch/Input signal Input signal to BCM BCM function Actuator/Output signal
Ignition knob switch Ignition knob
(push/release)
NATS• Steering lock solenoid
Key switch
Mechanical key
(Insert/remove)
Steering lock solenoid Ste eri ng
(lock/unlock)
ECM Engine status signal
Switch/Input signalInput signal to BCM BCM function Actuator/Output signal
NATS antenna amp. Key ID
NATS• Security indicator lamp
• Starter request
ECM Engine status signal
Revision: March 2010 2008 QX56

SEC-14
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
NVIS (NISSAN VEHICLE I
MMOBILIZER SYSTEM-NATS)
- Mechanical key
- Intelligent Key unit
- Remote keyless entry receiver
- Steering lock solenoid
• NATS trouble diagnosis, system initialization and additional registration of other mechanical key IDs must be
carried out using CONSULT-III.
When NATS initialization has been completed, the ID of the inserted mechanical key or mechanical key IDs
can be carried out.
• Possible symptom of NATS malfunction is “Engine cannot start”. Identify the possible causes according to
“Work Flow”, Refer to SEC-3, "
Work Flow".
• If ECM other than Genuine NISSAN is installed, t he engine cannot be started. For ECM replacement proce-
dure, refer to SEC-8, "
ECM RE-COMMUNICATING FUNCTION : Description".
PRECAUTIONS FOR KEY REGISTRATION
• The key registration is a procedure that erases the current NATS ID once, and then re-registers a new ID.
Therefore the registered Intelligent Key is necessary fo r this procedure. Before starting the registration oper-
ation collect all registered Intelligent Keys from the customer.
• The NATS ID registration is the procedure that regi sters the ID stored into the transponder (integrated in
mechanical key) to BCM.
The Intelligent Key ID registration is the procedur e that registers the ID to Intelligent Key unit.
• When performing the Intelligent Key system registration only, the engine cannot be started by inserting the key into the key cylinder. When performing the NATS registration only, the engine cannot be started by using
the mechanical key.
SECURITY INDICATOR
• Always flashes with ignition knob released (ignition knob switch: LOCK) condition on ignition knob LOCKposition.
• Always flashes with ignition knob released (ignition knob switch: LOCK) condition on mechanical key removed position.
MAINTENANCE INFORMATION
CAUTION:
It is necessary to perform NATS ID registration when replacing any of the following part.
If it's not (or fail to do so), the electrical system may not operate properly.
• Intelligent Key unit
• BCM
•ECM
• Mechanical key
• Steering lock solenoid
• NATS antenna amp.
Revision: March 2010 2008 QX56

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
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Component Parts LocationINFOID:0000000001539106
Component DescriptionINFOID:0000000001539107
1. Key switch and ignition knob switch M12 2. Steering lock solenoid M15
(view with steering column removed) 3. Remote keyless entry receiver M25
(view with instrument panel RH re-
moved)
4. BCM M18, M19, M20 (view with instrument panel LH re-
moved) 5. Intelligent Key unit M70
(view with instrument panel LH re-
moved) 6. ECM E16
7. IPDM E/R E122, E124 (view with co ver removed) 8. NATS antenna amp. M21
9. Combination meter M23, M24
10. Security indicator lamp
ALKIA0959ZZ
Item Function
Intelligent Key unit Receives lock/unlock signal from re mote keyless entry receiver, and then transmits to BCM.
BCM Controls the door lock function and room lamp function.
Remote keyless entry receiver Receives lock/unlock signal from the 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.
Revision: March 2010 2008 QX56

SEC-16
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
NVIS (NISSAN VEHICLE I
MMOBILIZER SYSTEM-NATS)
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.
Ignition knob switch Monitors the status of the ignition knob switch.
NATS antenna amp. Detects the mechanical key presence in the ignition key cylinder.
Security indicator Indicates the status of the security system.
IPDM E/R Monitors the ignition switch and the park switch signal from the TCM.
Item
Function
Revision: March 2010 2008 QX56

VEHICLE SECURITY SYSTEMSEC-17
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VEHICLE SECURITY SYSTEM
System DiagramINFOID:0000000001539108
System DescriptionINFOID:0000000001539109
DESCRIPTION
The security system provides an audible and visual alarm when an unauthorized access to the vehicle is
detected while the system is in armed phase.
The security system consist of the BCM managing the audible alarm (horn) and the visual alarm (headlamps).
OPERATION FLOW
Disarmed Phase
When the vehicle is being driven or when doors are open, the theft warning system is set in the disarmed
phase on the assumption that the owner is inside or near the vehicle.
Pre-Armed Phase And Armed Phase
The vehicle security system turns into the pre-armed phase when ignition switch is in OFF position, all doors
are closed and locked (using Intelligent Key, door reques t switch or auto relock function). The system auto-
matically shifts into the armed phase.
Condition of Activating The System
When the following condition is performed in armed phase, the system sounds the horns and flashes the
headlamps for about 30 seconds.
• Any door is opened.
ALKIA1420GB
PIIA1367E
Revision: March 2010 2008 QX56

DIAGNOSIS SYSTEM (BCM)SEC-21
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ACTIVE TEST
THEFT ALM
THEFT ALM : CONSULT-III Function (BCM - THEFT ALM)INFOID:0000000004807912
WORK SUPPORT
Monitor Item [Unit] Description
IGN ON SW [ON/OFF] Indicates condition of ignition switch in ON position.
Test Item Description
THEFT IND This test is able to check security indicator operation [ON/OFF].
Work Item Description
SECURITY ALARM SET Vehicle security function mode can be changed in this mode.
• ON: Vehicle security function is ON.
• OFF: Vehicle security function is OFF.
Revision: March 2010
2008 QX56

DIAGNOSIS SYSTEM (INTELLIGENT KEY UNIT)SEC-23
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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ACTIVE TEST
Monitor Item Condition
PUSH SW Indicates [ON (pressed)/OFF (released)] condition of ignition knob switch.
KEY SW Indicates [ON (inserted)/OFF (removed)] cond ition of key switch.
DR REQ SW Indicates [ON (pressed)/OFF (released)] condition of door request swit ch (driver side).
AS REQ SW Indicates [ON (pressed)/OFF (re
leased)] condition of door request switch (passenger
side).
BD/TR REQ SW Indicates [ON (pressed)/OFF (released)] condition of door request switch (back door).
IGN SW Indicates [ON (ON or START position)/OFF (other than ON and START position)] con-
dition of ignition switch ON position.
ACC SW Indicates [ON/OFF] condition of ignition switch ACC position.
STOP LAMP SW Indicates [ON/OFF] condition of stop lamp switch.
DOOR LOCK SIG Indicates [ON/OFF] condition of LOCK signal from Intelligent Key.
DOOR UNLOCK SIG Indicates [ON/OFF] condition of UNLOCK signal from Intelligent Key.
DOOR SW DR Indicates [OPEN/CLOSE] condition of front door switch (driver side) from BCM via CAN
communication.
DOOR SW AS Indicates [OPEN/CLOSE] condition of front door switch (passenger side) from BCM via
CAN communication.
DOOR SW RR Indicates [OPEN/CLOSE] condition of rear door switch (RH) from BCM via CAN com-
munication.
DOOR SW RL Indicates [OPEN/CLOSE] condition of rear door switch (LH) from BCM via CAN com-
munication.
DOOR BK SW Indicates [OPEN/CLOSE] condition of back door switch from BCM via CAN communi-
cation.
VEHICLE SPEED Displays the vehicle speed signal received from combination meter by numerical value
[km/h].
Test item
Description
DOOR LOCK/UNLOCK This test is able to check door lock/unlock operation.
• ALL UNLK: All door lock actuators are unlocked.
• DR UNLK: Door lock actuator
(driver side) is unlocked.
• AS UNLK: Door lock actuator (passenger side) is unlocked.
• BK UNLK: This item is indicated, but inactive.
• LOCK: All door lock actuator is locked.
ANTENNA This test is able to check Intelligent Key antenna operation.
When the following condition are met, hazard warning lamps flash.
• ROOM ANT1: Inside key antenna (console) detects Intelligent Key, when “ROOM
ANT1” is selected.
• ROOM ANT2: Inside key antenna (instrument center/rear seat) detects Intelligent
Key, when “ROOM ANT2”is selected.
• DRIVER ANT: Outside key antenna (driver side) detects Intelligent Key, when “DRIV- ER ANT” is selected.
• ASSIST ANT: Outside key antenna (passenger side) detects Intelligent Key, when “ASSIST ANT” is selected.
• BK DOOR ANT: Outside key antenna (rear bumper) detects Intelligent Key, when “BK
DOOR ANT” is selected.
OUTSIDE BUZZER This test is able to check Intelligent Key warning buzzer operation.
•ON
•OFF
INSIDE BUZZER This test is able to check warning chime in combination meter operation.
• TAKE OUT: Take away
warning chime sounds.
• KNOB: Ignition knob switch warning chime sounds.
• KEY: Key warning chime sounds.
•OFF
Revision: March 2010 2008 QX56

SEC-24
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000001539116
CAN (Controller Area Network) is a serial communication
line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H line, CAN-L line) al lowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart, refer to LAN-44, "
CAN Communication Signal Chart".
DTC LogicINFOID:0000000001539117
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000001539118
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “Self Diagnostic Result”.
Is
“CAN COMM CIRCUIT” displayed?
YES >> Refer to LAN-5, "CAN Communication Control Circuit".
NO >> Refer to GI-38, "
Intermittent Incident".
DTCCONSULT-III display
description DTC Detection Condition
Possible cause
U1000 CAN COMM CIRCUIT When Intelligent Key unit cannot communi-
cate CAN communication signal continuous-
ly for 2 seconds or more. In CAN communication system, any item (or items)
of the following listed below is malfunctioning.
•Transmission
• Receiving (BCM)
• Receiving (ECM)
• Receiving (METER/M&A)
Revision: March 2010
2008 QX56

SEC-26
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2013 ID DISCORD I-KEY-STRG
B2013 ID DISCORD I-KEY-STRG
DescriptionINFOID:0000000001539123
Intelligent Key unit performs the ID verification with the
steering lock solenoid and releases the steering lock if
both Intelligent Key unit and steering lock solenoid ID are same. Intelligent Key unit starts the communication
with the steering lock solenoid when Intelligent Key is carried into the vehicle and the ignition knob switch is
pressed.
DTC LogicINFOID:0000000001539124
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press the ignition knob switch.
2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-26, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000001539125
1.PERFORM INITIALIZATION
Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.
Can the system be initialized and can steering lo ck be released with re-registered mechanical key?
YES >> Steering lock solenoid was unregistered.
NO >> GO TO 2
2.CHECK STEERING LOCK SOLENOID POWER SUPPLY-1
1. Turn ignition switch OFF.
2. Disconnect steering lock solenoid connector.
3. Check voltage between steering lock solenoid harness connec- tor and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3.CHECK STEERING LOCK SOLENOID GROUND CIRCUIT
DTC No.Trouble diagnosis
name DTC detecting condition
Possible cause
B2013 STRG COMM 1 The ID verification results between Intelligent Key
unit and steering control unit are NG. The registra-
tion is necessary.
Steering lock solenoid
Te r m i n a l s
Voltage (V)(Approx.)
(+)
(–)
Steering lock solenoid con-
nector Te r m i n a l
M15 1Ground Battery voltage
WIIA1202E
Revision: March 2010 2008 QX56