Nissan Murano Z51. Manual - part 1241

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

SEC-11

< SYSTEM DESCRIPTION >

[WITH INTELLIGENT KEY SYSTEM]

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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.

BCM confirms that the shift position is P or N.

7.

BCM transmits the starter request signal via CAN communication to IPDM E/R and turns the starter relay
in IPDM E/R ON if BCM judges that the engine start condition is satisfied.

8.

IPDM E/R turns the starter control relay ON when receiving the starter request signal.

9.

Battery power is supplied through the starter relay and the starter control relay to operate the starter motor
and to start the cranking.

CAUTION:

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

10. When BCM received feedback signal from ECM acknowledging the engine has been initiated, the BCM

transmits a stop signal to IPDM E/R and stops the cranking by turning OFF the starter motor relay. (If the
engine initiating has failed, the cranking will stop automatically within 5 seconds.)

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 “POWER SUPPLY POSITION CHANGE TABLE BY PUSH-BUTTON
IGNITION SWITCH OPERATION”.

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 NVIS (NATS) 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 

SEC-15, "System Description"

.

BATTERY SAVER SYSTEM

When all the following conditions are met for 60 minutes, the battery saver system will cut off the power supply
to prevent battery discharge.
• The ignition switch is in the ACC position
• All doors are closed
• Selector lever is in the P position

Reset Condition of Battery Saver System

In order to prevent the battery from discharging, the battery saver system will cut off the power supply when all
doors are closed, the selector lever is in P position and the ignition switch is left on ACC position for 60 min-
utes. If any of the following conditions are met the battery saver system is released. At the same time, the
steering will change automatically to LOCK position from OFF position (models with steering lock unit).
• Opening any door
• Operating with request switch on door lock
• Operating with Intelligent Key on door lock
Press push-button ignition switch and ignition switch will change to ACC position from OFF position.

STEERING LOCK OPERATION

Steering is locked by steering lock unit when ignition switch is in the OFF position, selector lever is in the P
position and any of the following conditions are met.
• Opening door
• Closing door
• Door is locked with request switch
• Door is locked with Intelligent Key
NOTE:
For models without steering lock unit, power supply position changes to LOCK even though the steering lock
operation is not performed.

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

SEC-12

< SYSTEM DESCRIPTION >

[WITH INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

The power supply position changing operation can be performed with the following operations.
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, BCM checks the following conditions and then changes the power supply position.
- Brake pedal operating condition
- Selector lever position
- Vehicle speed

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

Vehicle speed: 4 km/h (2.5 MPH) or more

Emergency stop operation

• Press and hold the push-button ignition switch for 2 seconds or more.

• Press the push-button ignition switch 3 times or more within 1.5 seconds.

Power supply position

Engine start/stop condition

Push-button ignition switch 

operation frequency

Selector lever

Brake pedal operation 

condition

LOCK 

→

 ACC

—

Not depressed

1

LOCK 

→

 ACC 

→

 ON

—

Not depressed

2

LOCK 

→

 ACC 

→

 ON 

→

 OFF

—

Not depressed

3

LOCK 

→

 START

ACC 

→

 START

ON 

→

 START

P or N position

Depressed

1

Engine is running 

→

 OFF

—

—

1

Power supply position

Engine start/stop condition

Push-button ignition switch 

operation frequency

Selector lever

Brake pedal operation 

condition

Engine is running 

→

 ACC 

—

—

Emergency stop operation

Engine stall return operation while 
driving 

N position

Not depressed

1

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

SEC-13

< SYSTEM DESCRIPTION >

[WITH INTELLIGENT KEY SYSTEM]

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Component Parts Location

INFOID:0000000005515457

1.

BCM M118, M119, M121, M122, M123

2.

TCM F23

3.

IPDM E/R E10, E11, F12

4.

ECM E16

5.

Push-button ignition switch M101

6.

Key slot M99

7.

Combination meter (key warning lamp) 
M34

8.

Security indicator lamp M100

9.

Horn (high) E340, E341

10. Horn (low) E342, E343

11.

CVT shift selector (detention switch) 
M57 

12. Stop lamp switch

E116

13. Remote keyless entry receiver M78

A.

Behind the combination meter

B.

Engine room (LH)

C.

View with the center console as-
sembly removed

D.

Behind the instrument lower panel LH

E.

Behind the instrument lower panel RH

JMKIA1825ZZ

SEC-14

< SYSTEM DESCRIPTION >

[WITH INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

Component Description

INFOID:0000000005515458

1.

Front power window switch (passen-
ger side) D45

2.

Inside key antenna (console) M305

3.

Inside key antenna (luggage room) 
B86

4.

Back door lock assembly (back door 
switch) D180

5.

Front door switch (driver side) B34

6.

power window main switch (door 
lock and unlock switch) D5, D6

A.

Under the rear seat seatback

JMKIA4874ZZ

Component Reference

BCM

SEC-94

Steering lock unit (models with steering lock unit)

SEC-82

Push-button ignition switch

SEC-95

Door switch

DLK-97

CVT shift selector (detention switch)

SEC-61

Inside key antenna

DLK-91

Remote keyless entry receiver

DLK-114

Stop lamp switch

SEC-55

Transmission range switch

SEC-69

Steering lock relay  (models with steering lock unit)

SEC-73

Starter relay

SEC-76

Starter control relay

SEC-105

Security indicator lamp

SEC-115

Key warning lamp

SEC-117