Infiniti M35/M45 Y50. Manual - part 294

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

BL-245

NOTE:
If customer reports a “No start” condition, request ALL KEYS to be brought to an INFINITI dealer to
check for an IVIS (NATS) malfunction.

10. Unified meter and A / C amp M64, M65 11.

Combination meter M52

12. Multifunction switch M69

(Security indicator)

13. Steering lock unit M35

(Steering column)

PIIB5895E

BL-246

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

System Description

NIS0020D

DESCRIPTION

●

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 duplicates 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 Intelligent Key system of FUGA (Y50) is not the same as the conventional models. The mechanical
key integrated in the Intelligent Key cannot start the engine. When the Intelligent Key battery is dis-
charged, 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 and apply the anti-theft system equipment sticker, forewarn that the IVIS
(NATS) is onboard with the model.

●

The security indicator always blinks when the Intelligent Key is removed from the key slot and when the
power supply position is in LOCK position.

●

Intelligent Key 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 Intelligent Key. The registrations pro-
cedure for IVIS (NATS) and registration procedure for Intelligent Key when installing the Intelligent Key
unit, refer to CONSULT-II Operation Manual NATS-IVIS/NVIS.

●

Possible symptom of IVIS (NATS) malfunction is “Engine cannot start”. In FUGA (Y50), the engine can be
started with the Intelligent Key system and IVIS (NATS). Identify the possible causes according to “Work
Flow”, Refer to

BL-269, "Work Flow"

●

If ECM other than Genuine NISSAN is installed, the engine cannot be started. For ECM replacement pro-
cedure, refer to

BL-248, "ECM Re-Communicating Function"

PRECAUTIONS FOR KEY REGISTRATION

●

The key registration is a procedure that erases the current IVIS (NATS) ID once, and then re register a
new ID operation. Therefore the registered Intelligent Key is necessary for this procedure. Before starting
the registration operation collect all registered Intelligent Key from the customer

●

When registering the Intelligent Key, 2 registration procedures [IVIS (NATS) ID registration and Intelligent
Key ID registration] should be performed. The IVIS (NATS) ID registration is the procedure that registers
the ID stored into the transponder (integrated into Intelligent Key) to the BCM. The Intelligent Key ID reg-
istration is the procedure that registers the ID to the Intelligent Key unit. Each registration procedure
should be done separated.

●

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 operation when carrying the key. The registrations of both systems should be performed.

SECURITY INDICATOR

●

Warn the outside that the vehicle is the model with IVIS (NATS).

●

The security indicator always blinks when the Intelligent Key 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.

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

BL-247

Operation Description

NIS0020E

SYSTEM DIAGRAM

OPERATION WHEN INSERTING TO KEY SLOT

When inserting the Intelligent Key (with transponder) into the key slot, the key switch in the key slot turns
ON, and then it is detected that the Intelligent Key is inserted.

When pressing the push-button ignition switch at that time, BCM starts the IVIS (NATS) antenna amplifier
integrated with the key slot and starts the IVIS (NATS) ID communication with the transponder integrated
with the Intelligent Key.

BCM sends the IVIS (NATS) ID verification result to ECM via CAN communication and performs the ID
verification.

If the IVIS (NATS) ID verification result is OK, BCM sends the key ID verification OK signal to Intelligent
Key unit via CAN communication line.

The Intelligent Key unit sends the steering unlock signal to the steering lock unit when receiving the sig-
nal. Then, it sends each power supply request signal to PDU (Power Distribution Unit) after unlocking the
steering lock.

If the Intelligent Key unit judges that the engine start condition is satisfied, it sends the starter request sig-
nal via CAN communication to IPDM E/R and turns the starter motor relay ON.

The steering lock unit unlocks the latch when receiving the signal. PDU starts the power distribution
according to the power supply position when receiving the signal.

NOTE:
If it is not in the engine start condition*, the starter motor relay is turned OFF. Therefore, the engine cannot be
started and the power distributions of ACC, ON, and LOCK are performed only according to the push-button
ignition switch operation.
*: For the engine start condition, refer to

BL-247, "PUSH-BUTTON IGNITION SWITCH OPERATION PROCE-

DURE"

OPERATION WHEN INTELLIGENT KEY IS CARRIED

By carrying the Intelligent Key, the engine start/stop operation can be performed only when pushing the push-
button ignition switch.
For the details of the function, refer to

BL-125, "INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION"

PUSH-BUTTON IGNITION SWITCH OPERATION PROCEDURE

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

●

When an Intelligent Key is carried and when it is inserted to the key slot, the following operation is the
same.

●

When starting the engine, the Intelligent Key unit monitors the engine start conditions (brake pedal opera-
tion, A/T selector lever position, vehicle speed, and steering lock condition).

PIIB6277E

BL-248

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

●

Unless each start condition is fulfilled, the engine will not response regardless of how many times the
push-button ignition switch is pushed. At that time, illumination repeats the position in the order of LOCK

→

ACC

→

LOCK.

*1: When the A/T selector lever position is N position, the engine start condition is different according to the vehicle speed.

●

At vehicle speed of 5 km/h or less, the engine can start only when the brake pedal is depressed.

●

At vehicle speed of 5 km/h or more, the engine can start even if the brake pedal is not depressed. (It is the same as “Engine stall
return operation while driving”.)

*2: When the A/T selector lever position is in any position other than P position and when the vehicle speed is 5 km/h or more, the
engine stop condition is different.

●

Press and hold the push-button ignition switch for 2 seconds or more. (When the push-button ignition switch is pressed for too short
a time, the operation may be invalid, so properly press and hold to prevent the incorrect operation.)

●

Press the push-button ignition switch 3 times within 1.5 seconds. (Emergency stop operation)

ECM Re-Communicating Function

NIS0020F

Performing following procedure can automatically perform re-communication of ECM and BCM or Intelligent
Key unit, but only when the ECM has been replaced with a new one (*1).
*1: New one means a virgin ECM which has never been energized on-board.
(In this step, initialization procedure by CONSULT-II is not necessary)

NOTE:

●

When registering new Key IDs or replacing the ECM other than brand new, refer to CONSULT-II
Operation Manual NATS-IVIS/NVIS.

●

If multiple keys are attached to the key holder, separate them before work.

●

Distinguish keys with unregistered key ID from those with registered ID.

Install ECM.

Insert the registered Intelligent Key (*2), turn ignition switch to “ON”.
*2: To perform this step, use the key that has been used before performing ECM replacement.

Maintain ignition switch in “ON” position for at least 5 seconds.

Turn ignition switch to “OFF”.

Power supply position

Engine start/stop condition

Engine switch operation fre-

quency

Brake pedal

A/T selector lever position

LOCK

→

ACC

Not depressed
(When A/T selector lever is in
any position other than P or N,
there will be no effect even if it
is depressed.)

Any position other than P or N
(When the brake pedal is not
depressed, there will be no
effect even if the A/T selector
lever is in P or N position.)

LOCK

→

ACC

→

Not depressed
(When A/T selector lever is in
any position other than P or N,
there will be no effect even if it
is depressed.)

Any position other than P or N
(When the brake pedal is not
depressed, there will be no
effect even if the A/T selector
lever is in P or N position.)

LOCK

→

ACC

→

LOCK

Not depressed
(When A/T selector lever is in
any position other than P or N,
there will be no effect even if it
is depressed.)

Any position other than P or N
(When the brake pedal is not
depressed, there will be no
effect even if the A/T selector
lever is in P or N position.)

LOCK

→

START

ACC

→

START

→

START

(Engine start)

Depressed

P or N position (*1)

[If the switch is pushed once,

the engine starts from any

power supply position (LOCK,

ACC, and ON)]

Engine start condition

→

LOCK

(Engine stop)

—

P position

Engine start condition

→

ACC

(Engine stop)

—

Any position other than P (*2)

Engine stall return operation
while driving

—

N position

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