Nissan Altima L32. Manual - part 1318

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NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

System Diagram

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System Description

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INPUT/OUTPUT SIGNAL CHART

SYSTEM DESCRIPTION

• The NVIS (NATS) is an anti-theft system by registering a keyfob ID in to the vehicle and prevents the engine

being started by an unregistered keyfob. It has a higher protection against auto thefts that duplicate mechan-

ical key.

• It performs the ID verification when starting the engine in the same way as the remote keyless entry system.

But, it performs the NVIS (NATS) ID verification when inserting the keyfob and performs the keyfob ID verifi-

cation when carrying the keyfob.

• The remote keyless entry system of L32 is not the same as the conventional models. The mechanical key

integrated in the keyfob cannot start the engine. When the keyfob battery is discharged, the NVIS (NATS) ID

verification memorized to the transponder integrated with keyfob is performed by inserting the keyfob into

the key slot. If the verification results are OK, the engine start operation can be performed by the push-but-

ton ignition switch operation.

• Locate the security indicator and apply the anti-theft system equipment sticker, forewarn that the NVIS

(NATS) is onboard with the model.

• The security indicator always blinks when the keyfob is removed from the key slot and when the power sup-

ply position is in LOCK position.

• Keyfob can be registered up to 4 keys (Including the standard ignition key) on request from the owner.

• The specified registration is required when replacing ECM, BCM or keyfob. The registrations procedure for

NVIS (NATS) and registration procedure for keyfob when installing the BCM, refer to CONSULT-III Opera-

tion Manual.

• Possible symptom of NVIS (NATS) malfunction is “Engine cannot start”. In L32, the engine can be started

with the remote keyless entry system and NVIS (NATS). Identify the possible causes according to “Work

Flow”, Refer to 

SEC-411, "Work Flow"

.

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

dure, refer to 

SEC-416, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

.

ALKIA1748GB

Switch

Input signal to BCM

BCM function

Actuator

Push-button ignition switch

Push switch

NVIS (NATS)

• Steering lock relay
• Steering lock unit
• Starter relay (IPDM E/R)
• Starter control relay (IPDM E/R)
• Starter motor
• KEY warning lamp
• Security indicator lamp

CVT device (park position switch)

P range

PNP switch

N, P range

Stop lamp switch

Brake ON/OFF

Key slot

Key ID

Each door switch

Door open/close

ECM

Engine status signal

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

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PRECAUTIONS FOR KEY REGISTRATION

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

new ID operation. Therefore the registered keyfob is necessary for this procedure. Before starting the regis-

tration operation collect all registered keyfobs from the customer

• When registering the keyfob, performs only one procedure to register simultaneously both ID (NVIS “NATS”

ID registration and keyfob ID registration).

The NVIS (NATS) ID registration is the procedure that registers the ID stored into the transponder (inte-

grated in keyfob) to BCM.

The keyfob ID registration is the procedure that registers the ID to BCM.

• When performing the keyfob registration only, the engine cannot be started by inserting the key into the key

slot. When performing the NVIS (NATS) registration only, the engine cannot be started by the operation

when carrying the key. The registrations of both systems should be performed.

SECURITY INDICATOR

• Warns that the vehicle is equipped with NVIS (NATS).

• The security indicator always blinks when the keyfob is removed from the key slot and when the ignition

switch is in LOCK position.

NOTE:

Because security indicator is highly efficient, the battery is barely affected.

Component Parts Location

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ALKIA1749ZZ

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NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

Component Description

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1.

Body control module M16, M17, M18, M19, M21
(view with instrument panel removed)

2.

CVT device (park position switch) 
M23

3.

ECM E10

4.

Push button ignition switch M38

5.

Key slot M40

6.

Electronic steering column lock M32 
(steering column)

7.

Stop lamp switch E38
(view with lower LH instrument panel removed)

8.

Security indicator lamp

9.

Information display

10. Park neutral position switch F25

Component Reference

BCM

SEC-498

Steering lock unit

SEC-488

Push-button ignition switch

SEC-499

Door switch

DLK-293

CVT device (park position switch)

SEC-467

Inside key antenna

DLK-283

Remote keyless entry receiver

DLK-337

Stop lamp switch

SEC-461

Park/neutral position switch

SEC-475

Steering lock relay

SEC-439

Starter relay

SEC-482

Starter control relay

SEC-466

Security indicator

SEC-514

Key warning lamp

SEC-513

VEHICLE SECURITY SYSTEM

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VEHICLE SECURITY SYSTEM

System Diagram

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System Description

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INPUT/OUTPUT SIGNAL CHART

OPERATION FLOW

SETTING THE VEHICLE SECURITY SYSTEM

Initial Condition

• Ignition switch is in OFF position.

ALKIA1750GB

Switch

Input signal to BCM

BCM system

Actuator

All door switch

Open or close

Vehicle security system

• IPDM E/R
• Head lamp
• Horn
• Security indicator lamp

Trunk room lamp switch

Door key cylinder switch

Lock or unlock

Door lock and unlock switch

Door request switch

Keyfob

Lock or unlock

Panic alarm

Key slot

Keyfob sensing

PIIA1367E