Nissan Note E12. Manual - part 539

SEC-8

< SYSTEM DESCRIPTION >

COMPONENT PARTS

BCM

BCM controls INTELLIGENT KEY SYSTEM
(ENGINE START FUNCTION), NISSAN VE-
HICLE IMMOBILIZER SYSTEM-NATS [NVIS
(NATS)] and VEHICLE SECURITY SYSTEM.
BCM performs the ID verification between
BCM and Intelligent Key when the Intelligent
Key is carried into the detection area of inside
key antenna, and push-button ignition switch
is pressed. If the ID verification result is OK,
ignition switch operation is available.
Then, when the ignition switch is turned ON,
BCM performs ID verification between BCM
and ECM. If the ID verification result is OK,
ECM can start engine.
Refer to

BCS-4, "BODY CONTROL SYSTEM

: Component Parts Location"

for detailed in-

stallation location.

Clutch interlock switch

Clutch interlock switch detects that clutch
pedal is depressed, and then transmits ON/
OFF signal to the BCM

10.

Stop lamp switch

Stop lamp switch detects that brake pedal is
depressed, and then transmits ON/OFF sig-
nal to the BCM

11.

Main power window and door lock/unlock switch

Door lock and unlock switch is integrated into
the power window main switch.
Door lock and unlock switch transmits door
lock/unlock operation signal to BCM.
Refer to

PWC-6, "Power Window Main

Switch"

12.

CVT shift selector (park position switch)

Park position switch is integrated into the
CVT shift selector and detects that the selec-
tor lever is in the P (park) position, then trans-
mits ON/OFF signal to the BCM and IPDM E/
R.

13.

Front door switch LH

Door switch detects door open/close condi-
tion and then transmits ON/OFF signal to
BCM.

14.

Rear door switch LH

Door switch detects door open/close condi-
tion and then transmits ON/OFF signal to
BCM.

15.

Inside key antenna (trunk room)

Inside key antenna (trunk room) detects
whether Intelligent Key is inside the vehicle or
not, and then transmits the signal to the BCM.
Refer to

DLK-13, "DOOR LOCK SYSTEM :

Inside Key Antenna (Trunk Room)"

16.

Inside key antenna (console)

Inside key antenna (console) detects whether
Intelligent Key is inside the vehicle or not, and
then transmits the signal to the BCM.
Refer to

DLK-13, "DOOR LOCK SYSTEM :

Inside Key Antenna (Console)"

17.

Push button ignition switch

Push-button ignition switch has push switch
inside which detects that push-button ignition
switch is pressed, and then transmits ON/
OFF signal to BCM. BCM changes the igni-
tion switch position with the operation of
push-button ignition switch. BCM maintains
the ignition switch position status while push-
button ignition switch is not operated.

No.

Component

Function

COMPONENT PARTS

SEC-9

< SYSTEM DESCRIPTION >

SEC

18.

NATS antenna amp.

ID verification is performed between the BCM
and the transponder integrated into the Intel-
ligent Key via the NATS antenna amp.

19.

Remote keyless entry receiver

Remote keyless entry receiver receives but-
ton operation signal and key ID signal of Intel-
ligent Key, and them transmits them to the
BCM.
Refer to

DLK-14, "DOOR LOCK SYSTEM :

Remote Keyless Entry Receiver"

No.

Component

Function

SEC-10

< SYSTEM DESCRIPTION >

SYSTEM

SYSTEM

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION : System Description

INFOID:0000000009606330

SYSTEM DIAGRAM

SYSTEM DESCRIPTION

• The engine start function of Intelligent Key system makes it possible to start and stop the engine without

using the key, based on the electronic ID verification. The electronic ID verification is performed between

BCM and Intelligent Key when the push-button ignition switch is pressed while the Intelligent Key is within

the detection area of inside key antenna.

NOTE:

The driver should carry the Intelligent Key at all times.

• Intelligent Key has 2 IDs (Intelligent Key ID and NATS ID). It can perform the door lock/unlock operation and

the push-button ignition switch operation when the registered Intelligent Key is carried.

• If the ID is successfully verified, when push-button ignition switch is pressed the engine can be started.

• Up to 4 Intelligent Keys can be registered (Including the standard Intelligent Key) upon request from the cus-

tomer.

NOTE:

Refer to

SEC-13, "NISSAN ANTI-THEFT SYSTEM : System Description"

for any functions other than engine

start function of Intelligent Key system.

ALKIA2976GB

SYSTEM

SEC-11

< SYSTEM DESCRIPTION >

SEC

PRECAUTIONS FOR INTELLIGENT KEY SYSTEM

The transponder (the chip for NATS ID verification) is integrated into the Intelligent Key. (For the con-

ventional models, it is integrated into the mechanical key.) Therefore, ID verification cannot be per-

formed by mechanical key only.

In that case, NATS ID verification can be performed when Intelligent Key backside is contacted to

push-button ignition switch while brake pedal is depressed. If verification result is OK, engine can be

started.

OPERATION WHEN INTELLIGENT KEY IS CARRIED

1. When the push-button ignition switch is pressed, the BCM activates the inside key antenna and transmits

the request signal to the Intelligent Key.

2. The Intelligent Key receives the request signal and transmits the Intelligent Key ID signal to the BCM.
3. BCM receives the Intelligent Key ID signal via remote keyless entry receiver and verifies it with the regis-

tered ID.

4. BCM turns ACC relay ON and transmits the 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. IPDM E/R turns the starter control relay ON for engine starting in advance.
7. BCM detects the selector lever position and brake pedal operation condition.
8. BCM transmits the starter request signal to IPDM E/R and turns the starter relay ON if BCM judges that

the engine start condition* is satisfied.

9. Power supply is supplied through the starter relay and the starter control relay to operate the starter motor.

CAUTION:

If a malfunction is detected in the Intelligent Key system, the “KEY” warning lamp on the combina-

tion meter illuminates. At that time, the engine cannot be started.

10. When BCM receives feedback signal from ECM indicating that the engine is started, the BCM transmits a

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

unsuccessful, cranking stops automatically within 5 seconds.)

CAUTION:

When the Intelligent Key is carried outside of the vehicle (inside key antenna detection area) while

the power supply is in the ACC or ON position, even if the engine start condition* is satisfied, the

engine cannot be started.

*: For the engine start condition, refer to “IGNITION SWITCH POSITION CHANGE TABLE BY PUSH-BUT-

TON IGNITION SWITCH OPERATION”.

OPERATION RANGE

Engine can be started when Intelligent Key is inside the vehicle. However, sometimes engine may not start

when Intelligent Key is on instrument panel or in glove box.

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

When Intelligent Key battery is discharged, NATS ID verification between transponder in Intelligent Key and

BCM is performed when Intelligent Key backside is contacted to push-button ignition switch while brake pedal

is depressed. If the verification result is OK, engine can be started.

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

The ignition switch position can be changed by the following operations.

NOTE:

• When an Intelligent Key is within the detection area of inside key antenna or 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 operation condition

- Selector lever position

- Vehicle speed

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

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