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Infiniti QX56 (JA60). Manual - part 214

BACK DOOR OPENER FUNCTION

DLK-27

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

DLK

BACK DOOR OPENER FUNCTION

BACK DOOR OPENER SWITCH
BACK DOOR OPENER SWITCH : System Diagram

INFOID:0000000005146883

BACK DOOR OPENER SWITCH : System Description

INFOID:0000000005146884

BACK DOOR OPENER OPERATION

NOTE:

The automatic back door system must be initialized by fully closing the back door anytime the battery

power is lost to the back door control unit. Refer to

DLK-9, "ADDITIONAL SERVICE WHEN REMOVING

BATTERY NEGATIVE TERMINAL : Description"

The automatic back door system consists of a one piece unit that combines the back door control unit along

with the back door motor, back door clutch and the back door encoder. The back door latch contains a lock

function that can control the two functions of automatic back door latch closure and electrical opener with a

single motor when you close the back door to the halfway-state.

• Back door auto closure

When the back door is closed to the halfway state (half-latch) position, the motor automatically drives to

rotate the latch lever and pull it in from half latched to full latched.

• Power back door

With the back door closed, if you press the power liftgate switch or press the keyfob button, or pull the back

door handle with the back door unlocked, the back door latch motor drives the open the locking plate and

releases the latch. The back door motor then raises the door to the full open position.

With the back door fully open, if you press the power liftgate switch, keyfob button or the back door close

switch, the back door motor closes the door to the half-latch state. The back door latch motor then drives the

latch to the full close position.

At the onset of each power open or power close application, the hazard lamps will flash 3 times and the

warning chime will sound 3 dings lasting a total of 2 seconds.

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 back

door opener request switch (1). However, this operating range

depends on the ambient conditions.

OPERATION DESCRIPTION

ALKIA0705GB

ALKIA0581ZZ

DLK-28

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

BACK DOOR OPENER FUNCTION

Power Liftgate Switch Operation (Fully Closed

→ Fully Open Operation)

• When the power liftgate switch is pressed, back door control unit terminal 23 receives the signal.

• The back door control unit checks the A/T selector lever (P) position through terminal 18, vehicle speed

through terminal 21, ignition status through terminal 7, glass hatch is closed through terminal 17 and battery

voltage is present through terminal 3.

• When the back door control unit receives the signal, if the auto back door operating enable conditions are

met, it sends a 5 volt signal through terminal 6 and grounds terminal 9 to sound the warning chime, sends a

signal to the BCM through terminal 4 to flash the hazard lamps and unlocks the back door latch through ter-

minal 12.

• The back door control unit supplies power to the magnetic clutch and the back door motor and moves the

back door in the open direction. (At this time, it also executes speed control, input reverse, and anti-pinch

detection control.)

• When the back door is opened to the full-open position, the full-open position is detected by the encoder,

and the back door control unit switches the back door motor OFF and the magnetic clutch is pulsed and then

turned OFF.

• The back door is held in the fully open position by the gas stays.

Remote Keyless Entry Operation (Fully Closed

→ Fully Open Operation)

• When the keyfob button is pressed for at least 0.5 seconds, back door control unit terminal 21 receives the

signal.

• The back door control unit checks the A/T selector lever (P) position through terminal 18, vehicle speed

through terminal 21, ignition status through terminal 7, glass hatch is closed through terminal 17 and battery

voltage is present through terminal 3.

• When the back door control unit receives the signal, if the auto back door operating enable conditions are

met, it sends a 5 volt signal through terminal 6 and grounds terminal 9 to sound the warning chime, sends a

signal to the BCM through terminal 4 to flash the hazard lamps and unlocks the back door latch through ter-

minal 12.

• The back door control unit supplies power to the magnetic clutch and the back door motor and moves the

back door in the open direction. (At this time, it also executes speed control, input reverse, and anti-pinch

detection control.)

• When the back door is opened to the full-open position, the full-open position is detected by the encoder,

and the back door control unit switches the back door motor OFF and the magnetic clutch is pulsed and then

turned OFF.

• The back door is held in the fully open position by the gas stays.

Back Door Handle Switch Operation (Fully Closed

→ Fully Open Operation)

• When the back door handle is pulled, back door control unit terminal 26 receives the signal.

• The back door control unit checks that the back door is unlocked and checks the A/T selector lever (P) posi-

tion through terminal 18, vehicle speed through terminal 21, ignition status through terminal 7, glass hatch is

closed, battery voltage and back door close switch position through terminal 13.

• When the back door control unit receives the signal, if all auto back door operating enable conditions are

met, it sends a 5 volt signal through terminal 6 and grounds terminal 9 to sound the warning chime, sends a

signal to the BCM through terminal 4 to flash the hazard lamps and unlocks the back door latch through ter-

minal 12.

• The back door control unit supplies power to the magnetic clutch and the back door motor and moves the

back door in the open direction. (At this time, it also executes speed control, input reverse, and anti-pinch

detection control.)

• When the back door is opened to the full-open position, the full-open position is detected by the encoder,

and the back door control unit switches the back door motor OFF and the magnetic clutch is pulsed and then

turned OFF.

• The back door is held in the fully open position by the gas stays.

Power Liftgate Switch Operation (Fully Open

→ Fully Closed Operation)

• When the power liftgate switch is pressed, the back door control unit terminal 23 receives the signal.

• The back door control units checks door position through the rotary encoder.

• When the back door control unit receives the signal, if the auto back door operating enable conditions are

met, it sends a signal through terminal 6 and grounds terminal 9 to sound the warning chime and sends a

signal to the BCM through terminal 4 to flash the hazard lamps.

• The back door control unit supplies power to the magnetic clutch and the back door motor and move the

back door in the close direction. (At this time, it also executes speed control, input reverse, and anti-pinch

detection control.)

BACK DOOR OPENER FUNCTION

DLK-29

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

DLK

• When the back door reaches the half-latch state, the half-latch switch detects this and the signal is sent to

the back door control unit terminal 22.

• When the back door control unit receives the half latch switch signal, it switches OFF the back door motor

and the magnetic clutch and operates the cinch latch motor.

• When the back door latch operates and full close is detected through terminal 14 of the back door control

unit, the cinch latch motor reverses to the neutral position and the back door auto closure operation ends

and the door is fully closed.

Remote Keyless Entry Operation (Fully Open

→ Fully Closed Operation)

• When the remote keyless entry switch is pressed for at least 0.5 seconds, the back door control unit terminal

21 receives the signal.

• The back door control units checks door position through the rotary encoder.

• When the back door control unit receives the signal, if the auto back door operating enable conditions are

met, it sends a signal through terminal 6 and grounds terminal 9 to sound the warning chime and sends a

signal to the BCM through terminal 4 to flash the hazard lamps.

• The back door control unit supplies power to the magnetic clutch and the back door motor and move the

back door in the close direction. (At this time, it also executes speed control, input reverse, and anti-pinch

detection control.)

• When the back door reaches the half-latch state, the half-latch switch detects this and the signal is sent to

the back door control unit terminal 22.

• When the back door control unit receives the half latch switch signal, it switches OFF the back door motor

and the magnetic clutch and operates the cinch latch motor.

• When the back door latch operates and full close is detected through terminal 14 of the back door control

unit, the cinch latch motor reverses to the neutral position and the back door auto closure operation ends

and the door is fully closed.

Back Door Close Switch Operation (Fully Open

→ Fully Closed Operation)

• When the back door close switch is pressed, the back door control unit terminal 8 receives the signal.

• The back door control units checks back door close switch (terminal 13) status and door position (must be

fully opened), through rotary encoder and battery voltage.

• When the back door control unit receives the signal, if the auto back door operating enable conditions are

met, it sends a signal through terminal 6 and grounds terminal 9 to sound the warning chime and sends a

signal to the BCM through terminal 4 to flash the hazard lamps.

• The back door control unit supplies power to the magnetic clutch and the back door motor and move the

back door in the close direction. (At this time, it also executes speed control, input reverse, and anti-pinch

detection control.)

• When the back door reaches the half-latch state, the half-latch switch detects this and the signal is sent to

the back door control unit terminal 22.

• When the back door control unit receives the half latch switch signal, it switches OFF the back door motor

and the magnetic clutch and operates the cinch latch motor.

• When the back door latch operates and full close is detected through terminal 14 of the back door control

unit, the cinch latch motor reverses to the neutral position and the back door auto closure operation ends

and the door is fully closed.

Reversal

The door will reverse direction during power open or close operation if the automatic door main switch, keyfob

or back door close switch is operated. A chime will sound to announce the reversal.

Anti-Pinch Function

• During auto operation, if an object is detected 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 pinch strips in the door's path, a warning chime

sounds and the back door operates in the open direction until it is fully open.

Gas Stay Check

• During each power open operation, the back door control unit monitors motor current draw to determine if

the gas stays are functioning properly.

• If a malfunction of the gas stays is detected, the back door control unit will close the back door while sound-

ing the warning chime. The back door cannot be opened using the switches until the gas stay malfunction is

repaired.

Warning Functions

• The hazard warning lamps flash and a warning chime is sounded according to the back door operating state,

operations, and conditions.

DLK-30

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

BACK DOOR OPENER FUNCTION

Auto Back Door Operation Enable Conditions

Control When Operating Enable Conditions Not Met During Power Open/Close

Control When Operating Enable Conditions No Longer Met

Operation

Power liftgate switch

Remote keyless entry

Back door handle switch

Back door

close switch

Operating

direction

Fully closed

→

open

Fully open

→

closed

Fully closed

→

open

Fully open

→

closed

Fully closed

→

open

Fully open

→

closed

Fully open

→

closed

Close
switch

CANCEL or NEUTRAL

NEUTRAL

Vehicle stop
condition

A/T selector le-

ver in P or N

range and vehi-

cle speed less
than 2 km/h or

ignition switch

in OFF position

—

A/T selector le-

ver in P or N

range and vehi-

cle speed less
than 2 km/h or

ignition switch

in OFF position

—

A/T selector le-

ver in P or N

range and vehi-

cle speed less
than 2 km/h or

ignition switch in

OFF position

—

Battery volt-
age

Approx. 11V or more

Back door
lock status

—

Unlocked

—

Glass hatch

Closed

Items

Operation condition

Not met case

Control

A/T selector lever P position

P or N position with ignition ON
or any position with ignition OFF

Other

Continue power open or close,
but sounds warning chime.

Back door close switch

NEUTRAL

CANCEL

Cancels power open/close op-
eration or door will release to
manual mode.

Voltage drop

11V or more

11 > V > 9

9 > V > reset voltage

Reset voltage > V

No power function available

Handle switch

Normal (GND)

Error (OPEN)

No operation. Cancel power
open/close release to manual.

Glass hatch

Closed

OFF

Cancels power door open oper-
ation, door will release to manu-
al mode.

Description

Operation

Control

Back door close switch turned to CANCEL

Warning chime active
→ Shift to manual mode after full open or
close operation is complete
(Recovery to power mode when main
switch turned OFF or door fully closed)

→ Shift to manual mode

A/T selector lever P or N position with igni-
tion switch ON

Warning chime active and one-way opera-
tion continuous
(Warning chime inactive and door fully open
or fully closed or operating conditions re-
covered)

Full open: power close operation allowed
Full close: operating conditions not met

→

no power open function.

Voltage drop 11 - 9V

One-way operation continued (equivalent
to the case of starting voltage

← 11V for

handle operation with warning chime ac-
tive)

Not allowed

Voltage drop less than 9V
(Microcomputer reset voltage - clutch hold
voltage)

• Motor stopped
• Clutch may slip
• Control not possible because microcom-

puter being reset

Control not possible because microcomput-
er being reset

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