Nissan Pathfinder (2011 year). Instruction — part 538
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
SEC-11
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
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SYSTEM DESCRIPTION
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
System Diagram
INFOID:0000000006246195
System Description
INFOID:0000000006246196
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 electronic 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 unit
• Starter relay request (to IPDM E/R)
• Inside key antenna
(Instrument panel, center console,
luggage areas)
• Key interlock solenoid
Ignition knob switch
Ignition knob
(push/release)
Steering lock unit
Steering lock
(lock/unlock)
Inside key antenna
(Front and rear center console, lug-
gage areas)
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
(Instrument panel, center console,
luggage areas)
ALKIA1267GB
2011 Pathfinder
SEC-12
< SYSTEM DESCRIPTION >
[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 ignition 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
BCS-16, "COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)"
other than engine start function 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 Intelligent Key. Therefore, the Intelligent 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 unit if the verification results
are OK. For detail of key warning lamp operation, refer to
.
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 "NO KEY" warning message will be
displayed in the combination meter. At that 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
.
STEERING LOCK OPERATION
Steering is locked by steering lock unit 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).
2011 Pathfinder
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
SEC-13
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
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Component Parts Location
INFOID:0000000006246197
ALKIA1717ZZ
1.
BCM M18, M19, M20
(view with instrument panel LH removed)
2.
Intelligent Key unit M164
(view with glove box removed)
3.
IPDM E/R
E119, E120, E122, E124
4.
ECM E16
5.
Key switch and ignition knob switch M66
(view with steering column removed)
6.
Steering lock solenoid M65
2011 Pathfinder
SEC-14
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Component Description
INFOID:0000000006246198
7.
Remote keyless entry receiver M67
(view with instrument panel RH removed)
8.
A/T shift selector (park position switch)
M158
(view with center console removed)
9.
Insrument panel area antenna M68
(view with center console removed)
10. Center console area antenna M212
(view with center console removed)
11. Luggage area antenna B129
(behind 3
rd
row seat)
12. Intelligent Key warning buzzer E60
13. Front door switch LH B8
RH B108
14. Rear door switch LH B18
RH B116
15. Back door latch (door ajar switch)
D502
16. A/T assembly F9
17. Combination meter M24
18. 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 the Intelligent Key, and then transmits to Intelligent Key unit.
Intelligent Key
Transmits button operation to remote keyless entry receiver.
Ignition knob switch
Monitors the status of the ignition knob switch.
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 (park position
switch)
Detects whether the shift lever is in park.
2011 Pathfinder
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
SEC-15
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
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NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
System Diagram
INFOID:0000000006246199
System Description
INFOID:0000000006246200
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 position (ignition knob switch: OFF).
• Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system. Refer to
.
• 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 vehicle 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 unit
Key switch
Mechanical key
(Insert/remove)
Steering lock unit
Steering
(lock/unlock)
ECM
Engine status signal
Switch/Input signal
Input signal to BCM
BCM function
Actuator/Output signal
NATS antenna amp.
Key ID
NATS
• Security indicator lamp
• Starter request
ECM
Engine status signal
2011 Pathfinder
SEC-16
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
NVIS (NISSAN VEHICLE IMMOBILIZER 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
.
• If ECM other than Genuine NISSAN is installed, the engine cannot be started. For ECM replacement proce-
dure, refer to
SEC-10, "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 for this procedure. Before starting the registration oper-
ation collect all registered Intelligent Keys from the customer.
• The NATS ID registration is the procedure that registers the ID stored into the transponder (integrated in
mechanical key) to BCM.
The Intelligent Key ID registration is the procedure 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 LOCK
position.
• 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.
2011 Pathfinder
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
SEC-17
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
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Component Parts Location
INFOID:0000000006246201
Component Description
INFOID:0000000006246202
1.
Key switch and ignition knob switch
M66
2.
Steering lock solenoid M65
(view with steering column removed)
3.
Remote keyless entry receiver M67
(view with glove box removed)
4.
BCM M18, M20
(view with instrument panel LH re-
moved)
5.
Intelligent Key unit M164
(view with glove box removed)
6.
ECM E16
7.
IPDM E/R E121
(view with cover removed)
8.
NATS antenna amp. M21
9.
Combination meter M24
10. Security indicator lamp
ALKIA1269ZZ
Item
Function
Intelligent Key unit
Receives lock/unlock signal from remote 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.
NATS antenna amp.
Detects the mechanical key presence in the ignition key cylinder.
2011 Pathfinder
SEC-18
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
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
2011 Pathfinder
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