Infiniti FX35, FX50 (S51). Manual - part 1650

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

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< SYSTEM DESCRIPTION >

[INTELLIGENT KEY SYSTEM]

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7.

Unified meter and A/C amp. M66, 
M67

8.

Inside key antenna (instrument cen-
ter) M131

9.

Front door switch (driver side) B16

10. Back door lock assembly

(door switch) D122

11.

A/T shift selector (detention switch) 
M137

12. Stop lamp switch E110

13. Hood switch E30

14. Key slot M22

A.

Dash side lower (passenger side)

B.

Engine room dash panel (RH)

C.

Behind the instrument assist lower 
panel

D.

A/T assembly

E.

View with the cluster lid C removed

F.

View with the center console assem-
bly removed

G.

Behind the instrument assist lower 
panel

H.

View with hood switch incorporated 
into hood lock (RH)

1.

Power window main switch
(door lock and unlock switch) D8, D9

2.

Front door lock assembly (driver 
side) (door key cylinder switch) D15

3.

Inside key antenna (console) M146

4.

Inside key antenna
(luggage room) B228

5.

Remote keyless entry receiver M104 6.

Security indicator lamp
(combination meter M53)

7.

Key warning lamp
(combination meter M53)

8.

Horn (high) 2 E69, E70

9.

Horn (high) 1 E61, E62

JMKIA2675ZZ

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< SYSTEM DESCRIPTION >

[INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

Component Description

INFOID:0000000005249401

A.

View with front door finisher removed B.

Under the rear seat seatback

C.

Behind the instrument lower panel 
RH

D.

Built in combination meter

E.

Built in combination meter

F.

View with front bumper removed

Component Reference

BCM

SEC-94

Steering lock unit

SEC-81

Push-button ignition switch

SEC-95

Door switch

DLK-69

A/T shift selector (detention switch)

SEC-60

Inside key antenna

DLK-61

Remote keyless entry receiver

DLK-83

Stop lamp switch

SEC-54

Steering lock relay

SEC-72

Starter relay

SEC-75

Starter control relay

SEC-59

Security indicator lamp

SEC-119

Key warning lamp

SEC-121

INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS

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< SYSTEM DESCRIPTION >

[INTELLIGENT KEY SYSTEM]

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INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS

System Diagram

INFOID:0000000005249402

System Description

INFOID:0000000005249403

• The IVIS (NATS) is an anti-theft system by registering an Intelligent Key ID in to the vehicle and prevents the

engine being started by an unregistered Intelligent Key. It has a higher protection against auto thefts that
duplicate mechanical key.

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

performs the IVIS (NATS) ID verification when inserting the Intelligent Key and performs the Intelligent Key
ID verification when carrying the Intelligent Key.

• The mechanical key integrated in the Intelligent Key cannot start the engine. When the Intelligent Key bat-

tery is discharged, the IVIS (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 performed by the push-button ignition switch operation.

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

(NATS) is onboard with the model.

• The security indicator lamp always blinks when the power supply position is in LOCK and ACC.
• Up to 4 Intelligent keys can be registered (Including the standard ignition key) on request from the owner.
• The specified registration is required when replacing ECM, BCM or Intelligent Key. The registration proce-

dure for IVIS (NATS) and registration procedure for Intelligent Key when installing the BCM, refer to CON-
SULT-III Operation Manual NATS-IVIS/NVIS.

• Possible symptom of IVIS (NATS) malfunction is “Engine can not start”. The engine can be started with the

Intelligent Key system and IVIS (NATS). Identify the possible causes according to “Work Flow”, refer to 

SEC-

5, "Work Flow"

.

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

dure, refer to 

SEC-8, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

.

PRECAUTIONS FOR KEY REGISTRATION

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

ID operation. Therefore the registered Intelligent Key is necessary for this procedure. Before starting the reg-
istration operation collect all registered Intelligent Keys from the customer.

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

“NATS” ID registration and Intelligent Key ID registration).
The IVIS (NATS) ID registration is the procedure that registers the ID stored in the transponder (integrated 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 IVIS (NATS) registration only, the engine cannot be started by the
pressing the push-button ignition switch operation when carrying the Intelligent Key. The registrations of both
systems should be performed.

SECURITY INDICATOR LAMP

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

JMKIA0058GB

SEC-16

< SYSTEM DESCRIPTION >

[INTELLIGENT KEY SYSTEM]

INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS

• The security indicator lamp always blinks when the ignition switch is in the LOCK and ACC position.
NOTE:
Because security indicator lamp is highly efficient, the battery is barely affected.

Component Parts Location

INFOID:0000000005249404

JMKIA2674ZZ