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Infiniti M35/M45 Y50. Manual - part 264

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

BL-125

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

PFP:285F1

Component Parts and Harness Connector Location

NIS001Y7

Fuse block (J/B) fuse layout

Fuse and fusible link box

BCM (View with instrument lower
panel RH removed) M1, M2

Intelligent key unit (View with dash
side finisher LH removed) M32, M33

PDU (View with combination meter
removed) M30, M31

IPDM E/R (Engine room) E4, E9

ECM (View with instrument lower
cover RH removed) M71

Push-button ignition switch M27

Stop lamp switch E124

PIIB5894E

BL-126

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

System Description

NIS001Y8

●

The engine start function of Intelligent Key system is a system that makes it possible to start and stop the
engine without removing the key. It verifies the electronic ID using two-way communications when press-
ing the push-button ignition switch while carrying the Intelligent Key, which operates based on the results
of electronic ID verification for Intelligent Key using two-way communications between the Intelligent Key
and the vehicle (Intelligent Key unit).

NOTE:
The driver should always carry the intelligent key at all times.

●

Intelligent Key has 2 IDs (for Intelligent Key and for immobilizer). It can perform the door lock/unlock oper-
ation and the push-button ignition switch operation when carrying the registered Intelligent Key.

●

When the Intelligent Key battery is discharged, it can be used as emergency by inserting the Intelligent
Key to the key slot. At that time, perform the immobilizer ID verification. If it is used when carrying the
Intelligent Key, perform the Intelligent Key ID verification.

●

If the ID is successfully verified, and when push-button ignition switch is pressed, steering lock will be
released and initiating the engine will be possible.

●

If the door lock/unlock operation is performed when the Intelligent Key battery is discharged, all doors
lock/unlock can be performed by operating the driver door key cylinder using the mechanical key set into
the Intelligent Key.

●

Intelligent Key can be registered up to 4 keys (Including the standard Intelligent Key) on request from the
owner.
NOTE:

●

Refer to

BL-43, "INTELLIGENT KEY SYSTEM"

for any functions other than engine start function of

Intelligent Key system.

10. Unified meter and A/C amp M64,

M65

11.

Combination meter M52

12. Security indicator

(Multifunction switch) M69

13. Steering lock unit M35

(Steering column)

14. Remote keyless entry receiver

(View with instrument lower panel
RH removed) M89

15. Key slot M14

PIIB5896E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

BL-127

PRECAUTIONS FOR INTELLIGENT KEY SYSTEM

●

In the Intelligent Key system of model Y50, the transponder (the chip for immobilizer ID verifica-
tion) is integrated into the Intelligent Key. (For the conventional models, it is integrated into the
mechanical key.) Therefore, the mechanical key cannot perform the ID verification, and thus it can-
not start the engine. Instead of it, the immobilizer ID verification can be performed by inserting the
Intelligent Key into the key slot, and then it can start the engine.

●

When registering the Intelligent Key, 2 registration procedures (immobilizer ID registration and
Intelligent Key ID registration) should be performed. The immobilizer ID registration is the proce-
dure that registers the ID stored into the transponder (integrated into Intelligent Key) to the BCM.
The Intelligent Key ID registration is the procedure that registers the ID to the Intelligent Key unit.
Each registration is a different procedure.

●

When performing the Intelligent Key ID registration only, the engine cannot be started by inserting
the key into the key slot. When performing the engine immobilizer ID registration only, the engine
cannot be started by the operation when carrying the key. The registrations of both systems
should be performed.

Operation Description

NIS001Y9

SYSTEM DIAGRAM

OPERATION WHEN INTELLIGENT KEY IS CARRIED
Description

When the push-button switch is pressed, the Intelligent Key unit signals the inside key antenna and sends
the request signal to the Intelligent Key.

The Intelligent Key receives the request signal and sends the Intelligent Key ID signal to the Intelligent
Key unit via the remote keyless entry receiver.

The Intelligent Key receives the Intelligent Key ID signal and verifies it with the registered ID.

If the ID is successfully verified, the Intelligent Key unit sends the steering unlock signal to the steering
lock unit. Then, it sends each power supply request signal to PDU (Power Distribution Unit) after unlock-
ing 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 steering lock when receiving the signal. PDU starts the power supply
distribution according to the push-button ignition switch operation when receiving the signal. If it enters the
engine start permission mode, the power supply is supplied from PDU to the starter motor relay and the
cranking is started.

CAUTION:

If a malfunction is detected in the Intelligent Key system, the “KEY” warning lamp in the combina-
tion meter illuminates for 15 seconds. At that time, the engine cannot be started.

When Intelligent Key unit received feedback signal from ECM acknowledging the engine has been initi-
ated, the Intelligent Key unit sends a stop signal to IPDM E/R and stops the cranking by turning OFF the

PIIB6272E

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INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

starter motor relay. (If the engine initiating has failed, the cranking will stop automatically within 5 sec-
onds.)

CAUTION:

When the Intelligent Key is carried outside of the vehicle (inside key antenna detection area) with
the power supply in ACC or ON position, even if the engine start condition* is satisfied, the engine
cannot be started.

*: For the engine start condition, refer to

BL-128, "PUSH-BUTTON IGNITION SWITCH OPERATION PROCE-

DURE"

Operation Range

Engine can be started when Intelligent Key is inside the vehicle. However, sometimes engine might not start
when Intelligent Key is on instrument panel or in glove box.

OPERATION WHEN KEY SLOT IS USED

When the Intelligent Key battery is discharged, it performs the immobilizer ID verification between the inte-
grated transponder and BCM by inserting the Intelligent Key into the key slot, and then the engine can be
started.
For details relating to starting the engine using key slot, refer to

BL-244, "IVIS (INFINITI VEHICLE IMMOBI-

LIZER SYSTEM-NATS)"

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 within the detection area of inside key antenna and when it is inserted to the
key slot, it is equivalent to the operations below.

●

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

●

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

→

AC-

→

LOCK.

Power supply position

Engine start/stop condition

Push-button ignition switch

operation frequency

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 is running

→

LOCK
(Engine stop)

—

P position

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