Nissan Altima L32. Instruction — part 1318
SEC-422
< FUNCTION DIAGNOSIS >
[SEDAN WITHOUT INTELLIGENT KEY]
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
System Diagram
INFOID:0000000004499053
System Description
INFOID:0000000004499054
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
• The NVIS (NATS) is an anti-theft system by registering a keyfob ID in to the vehicle and prevents the engine
being started by an unregistered keyfob. It has a higher protection against auto thefts that duplicate mechan-
ical key.
• It performs the ID verification when starting the engine in the same way as the remote keyless entry system.
But, it performs the NVIS (NATS) ID verification when inserting the keyfob and performs the keyfob ID verifi-
cation when carrying the keyfob.
• The remote keyless entry system of L32 is not the same as the conventional models. The mechanical key
integrated in the keyfob cannot start the engine. When the keyfob battery is discharged, the NVIS (NATS) ID
verification memorized to the transponder integrated with keyfob is performed by inserting the keyfob into
the key slot. If the verification results are OK, the engine start operation can be performed by the push-but-
ton ignition switch operation.
• Locate the security indicator and apply the anti-theft system equipment sticker, forewarn that the NVIS
(NATS) is onboard with the model.
• The security indicator always blinks when the keyfob is removed from the key slot and when the power sup-
ply position is in LOCK position.
• Keyfob 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 keyfob. The registrations procedure for
NVIS (NATS) and registration procedure for keyfob when installing the BCM, refer to CONSULT-III Opera-
tion Instruction.
• Possible symptom of NVIS (NATS) malfunction is “Engine cannot start”. In L32, the engine can be started
with the remote keyless entry system and NVIS (NATS). Identify the possible causes according to “Work
• If ECM other than Genuine NISSAN is installed, the engine cannot be started. For ECM replacement proce-
dure, refer to
SEC-416, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"
ALKIA1748GB
Switch
Input signal to BCM
BCM function
Actuator
Push-button ignition switch
Push switch
NVIS (NATS)
• Steering lock relay
• Steering lock unit
• Starter relay (IPDM E/R)
• Starter control relay (IPDM E/R)
• Starter motor
• KEY warning lamp
• Security indicator lamp
CVT device (park position switch)
P range
PNP switch
N, P range
Stop lamp switch
Brake ON/OFF
Key slot
Key ID
Each door switch
Door open/close
ECM
Engine status signal
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
SEC-423
< FUNCTION DIAGNOSIS >
[SEDAN WITHOUT INTELLIGENT KEY]
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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 keyfob is necessary for this procedure. Before starting the regis-
tration operation collect all registered keyfobs from the customer
• When registering the keyfob, performs only one procedure to register simultaneously both ID (NVIS “NATS”
ID registration and keyfob ID registration).
The NVIS (NATS) ID registration is the procedure that registers the ID stored into the transponder (inte-
grated in keyfob) to BCM.
The keyfob ID registration is the procedure that registers the ID to BCM.
• When performing the keyfob 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 keyfob is removed from the key slot and when the ignition
switch is in LOCK position.
NOTE:
Because security indicator is highly efficient, the battery is barely affected.
Component Parts Location
INFOID:0000000004499055
ALKIA1749ZZ
SEC-424
< FUNCTION DIAGNOSIS >
[SEDAN WITHOUT INTELLIGENT KEY]
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
Component Description
INFOID:0000000004499056
1.
Body control module M16, M17, M18, M19, M21
(view with instrument panel removed)
2.
CVT device (park position switch)
M23
3.
ECM E10
4.
Push button ignition switch M38
5.
Key slot M40
6.
Electronic steering column lock M32
(steering column)
7.
Stop lamp switch E38
(view with lower LH instrument panel removed)
8.
Security indicator lamp
9.
Information display
10. Park neutral position switch F25
Component Reference
BCM
Steering lock unit
Push-button ignition switch
Door switch
CVT device (park position switch)
Inside key antenna
Remote keyless entry receiver
Stop lamp switch
Park/neutral position switch
Steering lock relay
Starter relay
Starter control relay
Security indicator
Key warning lamp
VEHICLE SECURITY SYSTEM
SEC-425
< FUNCTION DIAGNOSIS >
[SEDAN WITHOUT INTELLIGENT KEY]
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VEHICLE SECURITY SYSTEM
System Diagram
INFOID:0000000004499057
System Description
INFOID:0000000004499058
INPUT/OUTPUT SIGNAL CHART
OPERATION FLOW
SETTING THE VEHICLE SECURITY SYSTEM
Initial Condition
• Ignition switch is in OFF position.
ALKIA1750GB
Switch
Input signal to BCM
BCM system
Actuator
All door switch
Open or close
Vehicle security system
• IPDM E/R
• Head lamp
• Horn
• Security indicator lamp
Trunk room lamp switch
Door key cylinder switch
Lock or unlock
Door lock and unlock switch
Door request switch
Keyfob
Lock or unlock
Panic alarm
Key slot
Keyfob sensing
PIIA1367E
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