Nissan Pathfinder. Manual - part 1037

SYSTEM

SEC-11

< SYSTEM DESCRIPTION >

[WITH INTELLIGENT KEY SYSTEM]

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SEC

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Vehicle speed: 4 km/h (2.5 MPH) or more

Emergency stop operation
• Press and hold the push-button ignition switch for 2 seconds or more.
• Press the push-button ignition switch 3 times or more within 1.5 seconds.

NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS

Power supply position

Engine start/stop condition

Push-button ignition switch 

operation frequency

Selector lever

Brake pedal operation 

condition

LOCK 

→ ACC

—

Not depressed

1

LOCK 

→ ACC → ON

—

Not depressed

2

LOCK 

→ ACC → ON → OFF

—

Not depressed

3

LOCK 

→ START

ACC 

→ START

ON 

→ START

P or N position

Depressed

1

Engine is running 

→ OFF

—

—

1

Power supply position

Engine start/stop condition

Push-button ignition switch 

operation frequency

Selector lever

Brake pedal operation 

condition

Engine is running 

→ ACC 

—

—

Emergency stop operation

Engine stall return operation while 
driving 

N position

Not depressed

1

SEC-12

< SYSTEM DESCRIPTION >

[WITH INTELLIGENT KEY SYSTEM]

SYSTEM

NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS : System Diagram

INFOID:0000000009175950

NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS : System Description

INFOID:0000000009175951

SYSTEM DESCRIPTION

• The NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS [NVIS (NATS)] prevents the engine from being

started by Intelligent Key whose ID is not registered to the vehicle (BCM). It has higher protection against

auto theft involving the duplication of mechanical keys.

• The ignition key integrated in the Intelligent Key cannot start the engine. When the Intelligent Key battery is

discharged, the NVIS (NATS) ID verification is performed between the transponder integrated with Intelligent

Key and BCM via NATS antenna amp. when the Intelligent Key backside is contacted to push-button ignition

switch. If the verification results are OK, the engine start operation can be performed by the push-button igni-

tion switch operation.

• Locate the security indicator lamp and apply the anti-theft system equipment sticker that warns that the NVIS

(NATS) is on-board the model.

• Security indicator lamp always blinks when the power supply position is any position other than ON.

• Up to 4 Intelligent Keys can be registered (including the standard ignition key) upon request from the owner.

• Specified registration is required when replacing ECM, BCM or Intelligent Key.

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

because of other than NVIS (NATS) malfunction, so start the trouble diagnosis according to 

SEC-71, "Work

Flow"

.

• If ECM other than genuine part is installed, the engine cannot be started. For ECM replacement procedure,

refer to 

EC-466, "Removal and Installation"

.

ALKIA2854GB

SYSTEM

SEC-13

< SYSTEM DESCRIPTION >

[WITH INTELLIGENT KEY SYSTEM]

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PRECAUTIONS FOR KEY REGISTRATION

• The ID registration is a procedure that erases the current NVIS (NATS) ID once, and then reregisters a new

ID. Therefore before starting the registration operation, collect all registered Intelligent Keys from the cus-

tomer.

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

(NATS) ID and Intelligent Key ID].

SECURITY INDICATOR LAMP

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

• Security indicator lamp always blinks when the power supply position is any position other than ON.

NOTE:

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

ENGINE START OPERATION WHEN INTELLIGENT KEY IS CONTACTED TO PUSH-BUTTON IG-
NITION SWITCH

1. When brake pedal is depressed while selector lever is in the P (Park) position, BCM activates NATS

antenna amp. that is located behind push-button ignition switch.

2. When Intelligent Key (transponder built-in) backside is contacted to push-button ignition switch, BCM

starts NVIS (NATS) ID verification between BCM and Intelligent Key (transponder built-in) via NATS

antenna amp.

3. When the NVIS (NATS) ID verification result is OK, buzzer in combination meter sounds and BCM trans-

mits the result to ECM.

4. BCM turns ACC relay ON and transmits ignition power supply ON signal to IPDM E/R.
5. IPDM E/R turns the ignition relay ON and starts the ignition power supply.
6. BCM detects that the selector lever position is P (Park) or N (Neutral).
7. BCM transmits starter request signal to IPDM E/R and turns the starter relay in IPDM E/R ON if BCM

judges that the engine start condition* is satisfied.

8. IPDM E/R turns the starter control relay ON when receiving the starter request signal.
9. Power supply is supplied through the starter relay and the starter control relay to operate the starter motor.
10. When BCM receives feedback signal from ECM indicating that the engine is started, BCM transmits a

stop signal to IPDM E/R and stops cranking by turning off the starter motor relay. (If engine start is unsuc-

cessful, cranking stops automatically within 5 seconds.)

*: For the engine start condition, refer to the table “POWER SUPPLY POSITION CHANGE TABLE BY PUSH-

BUTTON IGNITION SWITCH OPERATION” below.

POWER SUPPLY POSITION CHANGE TABLE BY PUSH-BUTTON IGNITION SWITCH OPERA-
TION

The power supply position changing operation can be performed with the following operations.

NOTE:

• When an Intelligent Key is within the detection area of inside key antenna and when Intelligent Key backside

is contacted to push-button ignition switch, it is equivalent to the operations below.

• When starting the engine, the BCM monitors under the engine start conditions:

- Brake pedal operating condition

- Selector lever position

- Vehicle speed

Vehicle speed: less than 4 km/h (2.5 MPH)

Power supply position

Engine start/stop condition

Push-button ignition switch 

operation frequency

Selector lever

Brake pedal operation 

condition

LOCK 

→ ACC

—

Not depressed

1

LOCK 

→ ACC → ON

—

Not depressed

2

LOCK 

→ ACC → ON → OFF

—

Not depressed

3

SEC-14

< SYSTEM DESCRIPTION >

[WITH INTELLIGENT KEY SYSTEM]

SYSTEM

Vehicle speed: 4 km/h (2.5 MPH) or more

Emergency stop operation
• Press and hold the push-button ignition switch for 2 seconds or more.
• Press the push-button ignition switch 3 times or more within 1.5 seconds.

VEHICLE SECURITY SYSTEM
VEHICLE SECURITY SYSTEM : System Diagram

INFOID:0000000009175952

VEHICLE SECURITY SYSTEM : System Description

INFOID:0000000009175953

• 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.

LOCK 

→ START

ACC 

→ START

ON 

→ START

P (Park) or N (Neutral) po-

sition

Depressed

1

Engine is running 

→ OFF

—

—

1

Power supply position

Engine start/stop condition

Push-button ignition switch 

operation frequency

Selector lever

Brake pedal operation 

condition

Power supply position

Engine start/stop condition

Push-button ignition switch 

operation frequency

Selector lever

Brake pedal operation 

condition

Engine is running 

→ ACC 

—

—

Emergency stop operation

Engine stall return operation while 
driving 

N (Neutral) position

Not depressed

1

JMKIA5735GB