Infiniti FX35, FX50 (S51). Manual - part 475

INTELLIGENT KEY SYSTEM

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< SYSTEM DESCRIPTION >

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7.

Front door switch (driver side) B16 

8.

Front door lock assembly (driver 
side) D15

9.

Fuel lid lock actuator B242

10. Back door opener switch D114

11.

Horn (low) E69, E70

12. Horn (high) E61, E62

13. Intelligent Key warning buzzer E80

A.

Dash side lower (passenger side)

B.

Engine room dash panel (RH)

C.

Behind the instrument lower panel 
(driver side)

D.

View with center console assembly 
removed

E.

View with front door finisher (LH) re-
moved

F.

View with luggage side finisher lower 
(RH) removed

G.

View with front bumper removed

H.

View with front bumper removed

1.

Push-button ignition switch (push 
switch) M50

2.

Inside key antenna (instrument cen-
ter) M131

3.

Unified meter and A/C amp.
M66, M67

4.

Inside key antenna (console) M146

5.

Inside key antenna (luggage room) 
B228

6.

Front outside handle LH (request 
switch)
D13

7.

Front outside handle LH (outside key 
antenna) D14

8.

Back door control unit D123

9.

Outside key antenna (back door) 
D118

JMKIA2607ZZ

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< SYSTEM DESCRIPTION >

INTELLIGENT KEY SYSTEM

DOOR LOCK FUNCTION : Component Description

INFOID:0000000005239493

BACK DOOR OPEN FUNCTION

BACK DOOR OPEN FUNCTION : System Diagram

INFOID:0000000005239494

BACK DOOR OPEN FUNCTION : System Description

INFOID:0000000005239495

This section describes the operation of the back door opener switch. The operation of the back door request
switch is the same as the door lock function. Refer to 

DLK-19, "DOOR LOCK FUNCTION : System Descrip-

tion"

. 

• The back door opener function can open the back door by pressing the back door opener switch while carry-

ing the Intelligent Key. At this time, all doors other than the back door and fuel lid are locked. 

• The back door opener function can open the back door by pressing the back door opener switch with all

doors and fuel lid unlocked by using the door request switch or remote controller. 

BACK DOOR OPEN

• When the BCM detects that back door opener switch is pressed, it activates the outside key antenna (back

door) and inside key antenna and transmits the request signal to the Intelligent Key. And then, checks that
the Intelligent Key is near the back door.

10. Back door lock assembly D122

11.

Back door opener request switch 
D116

A.

View with luggage floor finisher front 
removed

B.

View with back door finisher inner re-
moved

Item

Function

BCM

Controls the door lock function.

Door lock actuator

Output lock/unlock signal from BCM and locks/unlocks each door.

Door switch

Input door open/close condition to BCM.

Remote keyless entry receiver

Receives lock/unlock signal from the Intelligent Key, and then transmits to BCM.

Request switch

Input lock/unlock operation to BCM.

Intelligent Key

Transmits button operation to remote keyless entry receiver.

Outside key antenna

Detects if Intelligent Key is outside the vehicle.

Inside key antenna

Detects if Intelligent Key is inside the vehicle. 

Unified meter and A/C amp.

• Receive buzzer signal from BCM via CAN communication line, and sounds the buzzer.
• Transmits vehicle speed signal to BCM via CAN communication line.

Combination meter

Display, buzzer (combination meter) and KEY warning lamp are installed to combination meter. 

Intelligent Key warning buzzer

Warns the user of the lock/unlock condition and inappropriate operations with the buzzer sound.

JMKIA2680GB

INTELLIGENT KEY SYSTEM

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< SYSTEM DESCRIPTION >

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• If the Intelligent Key is within the outside key antenna detection area, it receives the request signal and

transmits the key ID signal to the BCM via remote keyless entry receiver.

• BCM receives the key ID signal and compares it with the registered key ID.
• When the back door opener switch operation signal is transmitted from BCM, closure motor is operated in

back door control unit.
The operation of the back door open is the same as the back door opener system. Refer to

DLK-48, "OPEN

FUNCTION : System Description"

OPERATION CONDITION

If the following conditions are satisfied, the back door can be opened. 
• Back door is closed
• Ignition switch is in the OFF position
• Intelligent Key is out of key slot
• Intelligent Key is outside of vehicle
• Intelligent Key is within out side key antenna detection area

OUTSIDE KEY ANTENNA DETECTION AREA

The outside key antenna detection area of back door open function
is in the range of approximately 80 cm (31.50 in) surrounding the
back door opener switch (1). However, this operating range depends
on the ambient conditions.

HAZARD AND BUZZER REMINDER FUNCTION

When the back door is opened using the back door opener switch, the hazard warning lamps and horn blink or
sound as a reminder.

LIST OF OPERATION RELATED PARTS

Parts marked with 

×

 are the parts related to operation.

JMKIA1955ZZ

Door lock function

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Back door open function by back door opener switch
(Carrying Intelligent Key)

×

×

×

×

×

×

×

×

×

×

×

Hazard and buzzer reminder function for door lock/unlock 
operation

×

×

×

×

DLK-26

< SYSTEM DESCRIPTION >

INTELLIGENT KEY SYSTEM

BACK DOOR OPEN FUNCTION : Component Parts Location

INFOID:0000000005239496

1.

BCM M118, M119, M120, M121, 
M122, M123

2.

Combination meter M53

3.

Key slot M22

4.

IPDM E/R E5, E6

5.

Remote keyless entry receiver M104 6.

A/T shift selector (detention switch) 
M137

JMKIA2606ZZ