Infiniti QX56 (Z62). Manual - part 391

DLK-30

< SYSTEM DESCRIPTION >

SYSTEM (INTELLIGENT KEY SYSTEM)

LIST OF OPERATION RELATED PARTS 

Parts marked with 

×

 are the parts related to operation.

Intelligent Key low battery warning

—

—

—

Key ID verification information

—

—

—

Warning/Information functions

“KEY” 

warning 

lamp

Information display

(combination meter)

Warning chime

Combination 

meter buzzer

Intelligent Key 

warning buzzer

JMKIA3049ZZ

JMKIA4907ZZ

Warning function

In

tel

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Ig

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 switch

Doo

r swi

tch

Do

or re

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it

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In

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de ke

y an

ten

na

Out

s

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y ant

en

na

In

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t Ke

y 

warn

ing

 b

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zze

r

Com

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io

n m

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u

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CAN communication 

system

BC

M

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“KEY” w

a

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g 

lamp

Intelligent Key system malfunction

×

×

×

OFF position warning

For internal

×

×

×

×

For external

×

×

×

P position warning

×

×

×

×

×

×

ACC warning

×

×

×

×

×

Take away warning

Door is open or close

×

×

×

×

×

×

×

×

×

Door is open

×

×

×

×

×

×

×

Push-button ignition switch 
operation

×

×

×

×

×

×

×

×

Door lock operation warning

×

×

×

×

×

×

×

Key ID warning

×

×

×

×

×

×

Engine start information

Ignition switch is ON position

×

×

×

×

×

×

Ignition switch is except ON 
position

×

×

×

×

×

×

Steering lock information

×

×

×

×

Intelligent Key low battery warning

×

×

×

×

×

×

Key ID verification information

×

×

×

×

×

SYSTEM (AUTOMATIC BACK DOOR SYSTEM)

DLK-31

< SYSTEM DESCRIPTION >

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SYSTEM (AUTOMATIC BACK DOOR SYSTEM)

System Diagram

INFOID:0000000006225852

System Description

INFOID:0000000006225853

The automatic back door system performs the automatic open/close operation of the back door by operating
the automatic back door switch, the automatic back door close switch, the back door opener switch, and Intel-
ligent Key.

AUTOMATIC BACK DOOR OPEN/CLOSE FUNCTION

• In the case of the back door fully closed, operate the automatic back door switch, Intelligent Key or back

door opener switch with the back door unlock. The back door closure motor releases the latch, then the
automatic back door motor opens the back door to the fully open position. Reverse the closure motor to the
neutral position simultaneously.

• In the case of the back door fully open, operate the automatic back door switch, Intelligent Key or automatic

back door close switch. The automatic back door motor closes the back door to the half-latch position, then
the back door closure motor to the full latch position. Then, reverse the closure motor to the neutral position.

BACK DOOR AUTO CLOSURE FUNCTION

JMKIA5198GB

DLK-32

< SYSTEM DESCRIPTION >

SYSTEM (AUTOMATIC BACK DOOR SYSTEM)

Open Function

When back door opener switch is pressed and automatic back door main switch in the OFF position, BCM
transmits the back door open request signal to automatic back door control unit via CAN communication, and
automatic back door control unit opens back door lock assembly. 

Closure Function

When the back door is closed to the half-latch position, the motor drives to rotate the latch lever and pulls it in
from half latched to fully latched and automatically closes the door. Then, reverse the closure motor to the
neutral position. 

WARNING FUNCTION

The warning function is as follows and gives the user warning information and warnings using automatic back
door buzzer and hazard.

Buzzer Operation Condition

ANTI-PINCH FUNCTION

During auto operation, if an object is detected by encoder pulse in the door's path, a warning chime sounds
and the back door operates in the reverse direction to prevent pinching.
During auto close operation, if an object is detected by the touch sensors in the door's path, a warning chime
sounds and the back door operates in the open direction until it is fully open.

Operation Condition

Pattern

Time

Description

A

0.75 sec.

Operation start announcement

Anti-pinch operation start announcement

B

Pi---

2.0 sec.

During the closure operation, the touch 
sensor detects any trapped foreign materi-
al and stops halfway

C

Pi------••••••

Back door fully closed or vehi-
cle is stopped

The conditions are not satisfied in the fully 
open position or during the operation, and 
then the operation continues

D

During open/close operation

During operation announcement

JMKIA1862ZZ

JMKIA1863ZZ

Detection method

Encoder pulse

Touch sensor

Applicable operation

Open/close operation

Close operation

Operation when 
any trapped for-
eign material is de-
tected

Stop the vehicle

Buzzer sounds (pattern A) 
and reverse operation

• Buzzer sounds (pattern A) and the back door stops in 

the fully-open position after reverse operation

• During closure (close) operation (at main switch OFF): 

Closure [open (neutral position return)] operation 

Running the ve-
hicle

No reverse operation (buzzer 
sounds, pattern C)

• The back door reverses a certain amount, and then it 

reverses automatically to perform the auto close oper-
ation

• During closure (close) operation (at main switch ON): 

Closure (open) operation

SYSTEM (AUTOMATIC BACK DOOR SYSTEM)

DLK-33

< SYSTEM DESCRIPTION >

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INTERMITTENT CLUTCH FUNCTION

If the main switch is turned to OFF during auto operation, the back door may be closed suddenly because the
operation is interrupted immediately when the operation cannot be continued because of the detection of a
system malfunction. Therefore, operate the clutch intermittently to stabilize the back door behavior and ensure
safety.

AUTOMATIC BACK DOOR OPEN/CLOSE OPERATION CONDITION

*: If the registered Intelligent Key is used, the operation can be performed even if the back door is in the LOCK position

CONTROL IF NOT WITHIN THE OPERATION CONDITIONS DURING THE OPERATION

If the back door is not within the operation conditions during the operation, the automatic back door control unit
performs the control as follows.

Non-reverse area

• Just after starting the mo-

tor operation

• Full range of closure oper-

ation

• Driving

• Back door open operation
• Closure [open (return the latch to the neutral position)]

Switch operation during reverse op-
eration

Receive

Number of allowable reverse opera-
tions

Perform the intermittent clutch function after 2 reverse operations regardless of the oper-
ation direction

Detection method

Encoder pulse

Touch sensor

Automatic back door switch

Intelligent Key

Automat-

ic back 

door close 

switch

Back door opener 

switch

Operating direction

Fully closed 

→

 Open

Fully open 

→

Closed

Fully 

closed 

→

 

Open

Fully open 

→

 Closed

Fully open 

→

 Closed

Fully closed 

→

 Open

Main switch

—

—

—

—

ON

ON

Ignition position

ON

ACC/ 

LOCK

—

—

—

ON

ACC/ 

LOCK

Shift selector lever

P position

—

—

—

—

—

P position

—

Vehicle speed

0 km/h

Back door lock condition

—

—

—

—

—

Unlock*

Touch sensor

Normal

Power supply
(Automatic power back 
door control unit)

Approx. 11 V or more

Item

(Condition)

Back door condition

Main Switch (ON 

→

 OFF)

• Motor:  OFF
• Clutch: OFF (Intermittent clutch function)

Vehicle stop condition (open operation)
• IGN ON and shift P position

→

IGN ON and 

other than P position

• IGN OFF and shift N position 

→

 IGN ON and 

N position

The operation is continued

Operation condition release during the opera-
tion start announcement condition

Automatic back door function does not operate