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Nissan Versa Note. Manual - part 714

SYSTEM

SEC-135

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

SEC

SYSTEM

NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS
NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS : System Diagram

INFOID:0000000009697561

NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS : System Description

INFOID:0000000009697562

INPUT/OUTPUT SIGNAL CHART

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 anyone 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)

• Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system.

• 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 5 keys.

• During trouble diagnosis or when the following parts have been replaced, and if ignition key is added, regis-

tration

is required.

: All keys kept by the owner of the vehicle should be registered with mechanical key.

- ECM

- BCM

- Ignition key

- Remote keyless entry receiver

• NATS trouble diagnosis, system initialization and additional registration of other mechanical key IDs must be

carried out using CONSULT.

• 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-162, "Work Flow"

• If ECM other than Genuine NISSAN is installed, the engine cannot be started. For ECM replacement proce-

dure, refer to

EC-465, "Removal and Installation"

PRECAUTIONS FOR KEY REGISTRATION

ALKIA2974GB

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

SEC-136

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

SYSTEM

• The key registration is a procedure that erases the current NATS ID once, and then re-registers a new ID.

Therefore the registered key is necessary for this procedure. Before starting the registration procedure, col-

lect all registered 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 key ID registration is the procedure that registers the ID to the BCM.

• When performing the 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 ignition

key.

SECURITY INDICATOR

• Always flashes with ignition key in the OFF position.

MAINTENANCE INFORMATION

CAUTION:

It is necessary to perform NATS ID registration when replacing any of the following parts.

If ID registration is mot performed the electrical system may not operate properly.

• BCM

• ECM

• IPDM E/R

• Ignition key

• NATS antenna amp.

• Dongle unit (Canada only)

• Combination meter

VEHICLE SECURITY SYSTEM
VEHICLE SECURITY SYSTEM : System Diagram

INFOID:0000000009697563

VEHICLE SECURITY SYSTEM : System Description

INFOID:0000000009697564

• 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.

ALKIA2985GB

SYSTEM

SEC-137

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

SEC

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 is opened by unauthorized means, while the system is in the ARMED state.

• Security indicator lamp on combination meter always blinks when ignition switch is in any position other than

ON. Security indicator lamp blinking warns that the vehicle is equipped with a vehicle security system.

Operation Flow

Priority

Function

Theft warning alarm

Panic alarm

JMKIA5416GB

No.

System state

Switching condition

DISARMED to
PRE-ARMED

When all conditions of A and
one condition of B is satis-
fied.

• Ignition switch: OFF
• All doors: Closed

All doors are locked by:
• Door key cylinder LOCK switch
• LOCK button of Keyfob
• Door lock and unlock switch

PRE-ARMED
to ARMED

When all of the following
conditions are satisfied for
30 seconds.

• Ignition switch: OFF
• All doors: Locked

ARMED to
ALARM

When all conditions of A and
B are satisfied.

Keyfob: Not used

• Any door: Open

DISARMED to
PRE-RESET

No conditions.

PRE-ARMED
to PRE-RESET

ARMED to
PRE-RESET

ALARM to
PRE-RESET

PRE-RESET to
DISARMED

PRE-RESET to
PRE-ARMED

PRE-ARMED
to DISARMED

When one of the following
condition is satisfied.

• Ignition switch: ACC/ON
• Door key cylinder UNLOCK switch: ON
• UNLOCK button of Keyfob: ON
• UNLOCK switch of door lock and unlock switch: ON
• Any door: Open

SEC-138

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

SYSTEM

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 Keyfob, the Keyfob must be within the detection area of remote key-

less entry receiver. For details, refer to

SEC-135, "NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS : System Description"

DISARMED Phase

The vehicle security system is not set in the DISARMED 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 between the DISARMED phase and the ARMED phase. This

phase is maintained for 30 seconds, so that the owner can 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 is opened without using

Keyfob, vehicle security system switches to the ALARM phase. Security indicator lamp blinks every 2.4 sec-

onds.

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 vehicle security system returns to the ARMED phase. At

this time, if BCM still detects unauthorized access to the vehicle, the system is switched to the ALARM phase

again. This RE-ALARM operation is carried out a maximum of 2 times.

To cancel the ALARM operation, refer to the switching condition of No. 12 in the table above.

NOTE:

If a battery terminal is disconnected during the ALARM phase, theft warning alarm stops. But when the battery

terminal is reconnected, theft warning alarm is activated again.

PRE-RESET Phase

The PRE-RESET phase is the transient state between each phase and DISARMED phase.

PRE-ARMED phase is not available for this models.

PANIC ALARM

• The panic alarm function activates horns and headlamps intermittently when the owner presses the PANIC

ALARM button of Keyfob outside the vehicle while the ignition switch is OFF.

• When BCM receives panic alarm signal from Keyfob, BCM transmits “Theft Warning Horn Request” signal

and “High Beam Request” signal intermittently to IPDM E/R via CAN communication. To prevent the activa-

tion due to mis-operation of Keyfob by owner, the panic alarm function is activated when BCM receives the

signal for 0.4 - 0.6 seconds.

• Panic alarm operation is maintained for 25 seconds.

• Panic alarm operation is cancelled when BCM receives one of the following signals.

- LOCK button of Keyfob: ON

- UNLOCK button of Keyfob: ON

- PANIC ALARM button of Keyfob: Long pressed

ARMED to
DISARMED

When one of the following
condition is satisfied.

• Ignition switch: ACC/ON
• Door key cylinder UNLOCK switch: ON
• UNLOCK button of Keyfob: ON

ALARM to
DISARMED

RE-ALARM

When the following condition
is satisfied after the ALARM
operation is finished.

• Any door: Open

No.

System state

Switching condition

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