Nissan Maxima. Manual - part 1047

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

SEC-13

< SYSTEM DESCRIPTION >

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Component Parts Location

INFOID:0000000010051902

1.

BCM M16, M17, M18, M19, M21
(view with instrument panel removed)

2.

Front door switch LH B8
RH B108

3.

Rear door switch LH B18
RH B116

4.

TCM F15

5.

ECM E10

6.

Push button ignition switch M38

7.

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

8.

Combination meter M24

9.

Security indicator lamp

AWKIA1699ZZ

SEC-14

< SYSTEM DESCRIPTION >

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

Component Description

INFOID:0000000010051903

10. Information display

11. Remote keyless entry receiver M27

(view with instrument panel removed) 

12. Key slot M40

13. Front console antenna M41

(view with center console removed)

14.  Rear parcel shelf antenna B29

15. CVT shift selector M78

Component Reference

BCM

SEC-31

Push-button ignition switch

SEC-46

Door switch

DLK-67

CVT shift selector

SEC-50

Inside key antenna

DLK-60

Remote keyless entry receiver

DLK-110

Stop lamp switch

SEC-43

Starter relay

SEC-63

Starter control relay

SEC-49

Security indicator

SEC-92

Key warning lamp

SEC-91

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

SEC-15

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NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

System Diagram

INFOID:0000000010051904

System Description

INFOID:0000000010051905

INPUT/OUTPUT SIGNAL CHART

SYSTEM DESCRIPTION

• The NVIS (NATS) is an anti-theft system. By registering an Intelligent Key ID into the vehicle, it prevents the

engine being started by an unregistered Intelligent Key. It has a higher protection against auto thefts than

duplicate mechanical keys.

• It performs the ID verification when starting the engine in the same way as the Intelligent Key system. But, it

performs the NVIS (NATS) ID verification when inserting the Intelligent Key and performs the Intelligent Key

ID verification when carrying the Intelligent Key.

• The Intelligent Key system of A35 is not the same as the conventional models. The mechanical key inte-

grated in the Intelligent Key cannot start the engine. When the Intelligent Key battery is discharged, the NVIS

(NATS) ID verification memorized to the transponder integrated with Intelligent Key is performed by inserting

the Intelligent Key into the key slot. If the verification results are OK, the engine start operation can be per-

formed by the push-button ignition switch operation.

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

(NATS) is onboard with the model.

• The security indicator always blinks when the Intelligent Key is removed from the key slot and when the

power supply position is in LOCK position.

• Intelligent Key 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 Intelligent Key. For registration proce-

dure for NVIS (NATS) and registration procedure for Intelligent Key when installing the BCM, refer to CON-

SULT Immobilizer mode and follow the on-screen instructions.

• Possible symptom of NVIS (NATS) malfunction is “Engine cannot start”. In A35, the engine can be started

with the Intelligent Key system and NVIS (NATS). Identify the possible causes according to “Work Flow”.

Refer to 

SEC-4, "Work Flow"

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AWKIA1700GB

Switch

Input signal to BCM

BCM function

Actuator

Push-button ignition switch

Push switch

NVIS (NATS)

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

CVT shift selector

P range

TCM

N, P range

Stop lamp switch

Brake ON/OFF

Key slot

Key ID

Each door switch

Door open/close

ECM

Engine status signal

SEC-16

< SYSTEM DESCRIPTION >

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

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

dure, refer to 

SEC-9, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

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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 Intelligent Key is necessary for this procedure. Before starting

the registration operation collect all registered Intelligent Keys from the customer

• When registering the Intelligent Key, perform only one procedure to register simultaneously both ID (NVIS

“NATS” ID registration and Intelligent Key ID registration).

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

grated in Intelligent Key) to BCM.

The Intelligent Key ID registration is the procedure that registers the ID to BCM.

• When performing the Intelligent Key system 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 Intelligent Key is removed from the key slot and when the igni-

tion switch is in LOCK position.

NOTE:

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