Nissan Note E12. Manual — part 539
SEC-8
< SYSTEM DESCRIPTION >
COMPONENT PARTS
8.
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
for detailed in-
stallation location.
9.
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
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
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
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 >
C
D
E
F
G
H
I
J
L
M
A
B
SEC
N
O
P
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
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:
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 >
C
D
E
F
G
H
I
J
L
M
A
B
SEC
N
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P
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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