INFINITI QX56 2010 Factory Service Manual

BACK DOOR OPENER FUNCTIONDLK-27
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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BACK DOOR OPENER FUNCTION
BACK DOOR OPENER SWITCH
BACK DOOR OPENER SWITCH : System DiagramINFOID:0000000005146883
BACK DOOR OPENER SWITCH : System DescriptionINFOID: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 piec e unit that combines the back door control unit along
with the back door motor, back door clutch and the ba ck door encoder. The back door latch contains a lock
function that can control the two functions of autom atic 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 liftgat e 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 t hen 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 applic ation, 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
Revision: April 20092010 QX56

DLK-28
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR OPENER FUNCTION
Power Liftgate Switch O
peration (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 ba ck 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 al so executes speed control, input reverse, and anti-pinch
detection control.)
Revision: April 20092010 QX56

BACK DOOR OPENER FUNCTIONDLK-29
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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• 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 det ected through terminal 14 of the back door control
unit, the cinch latch motor reverses to the neutral position and the back door aut\
o 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 m agnetic clutch and the back door motor and move the
back door in the close direction. (At this time, it al so 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 det ected through terminal 14 of the back door control
unit, the cinch latch motor reverses to the neutral position and the back door aut\
o 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 ba ck 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 m agnetic clutch and the back door motor and move the
back door in the close direction. (At this time, it al so 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 det ected through terminal 14 of the back door control
unit, the cinch latch motor reverses to the neutral position and the back door aut\
o 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 ifthe 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 usi ng 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.
Revision: April 20092010 QX56

DLK-30
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR OPENER FUNCTION
Auto Back Door Operation Enable Conditions
Control When Operating Enable Condit
ions 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
NEUTRALNEUTRAL
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 ————U
nlo ck e d——
Glass hatch Closed
ItemsOperation condition Not met caseControl
A/T selector lever P position P or N position with ignition ON
or any position with ignition OFFOther Continue power open or close,
but sounds warning chime.
Back door close sw itch NEUTRAL CANCEL
Cancels power open/close op-
eration or door will release to
manual mode.
Voltage drop
11V or more11 > 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 ClosedOFF 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
Revision: April 20092010 QX56

BACK DOOR OPENER FUNCTIONDLK-31
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Warning Chime Active Conditions
The warning chime uses two types of audio warnings, a friendly chime and a warning chime. The friendly
chime consists of dings lasting 0.66 seconds each imm
ediately followed by the next ding. The warning chime
consists of beeps lasting 0.33 seconds wit h a pause of 0.33 seconds between each beep.
Reverse Conditions
Operation statusOperation or conditions Warning chime pattern
When auto operation starts Power liftgate switch operation
Friendly chime
2 seconds, 3 dings
Remote keyless entry operation
Back door handle switch operation
Back door close switch operation
When reverse operation starts When reverse request is detected from
power liftgate switch, remote keyless
entry or back door close switch
Friendly chime
1.3 seconds, 2 dings
When obstacle is detected Warning chime
2 seconds, 3 beeps
Operating at low voltage While opening or closing Warning chime
2 seconds, 3 beeps
A/T selector lever not in P position Back door close operation
Friendly chime
Continuously dings
Back door open operation Warning chime
Continuously beeps
(until close operation is started)
Type Overload reverse
Operation covered Both directions
Detection method Operation speed and motor current change direction
Pinch strips during back door close operation
Non-reversed area • For about 0.5 seconds immediately after drive motor operation
starts
• Between full open and approx. 7 ° from full open
• Closure operation area (half switch - close switch)
Number of times reverse allowed One reversal is allowed (if a second obstacle is detected during a
power open or close operation, the door reverts to manual mode).
Revision: April 20092010 QX56

DLK-32
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR OPENER FUNCTION
BACK DOOR OPENER SWITCH : Component Parts Location
INFOID:0000000005146885
BACK DOOR OPENER SWITCH : Component DescriptionINFOID:0000000005146886
1. BCM M18, M19, M20 (view with instrument panel LH removed) 2. Back door control unit B55
(view with right re ar panel removed) 3. Power liftgate switch M92
4. Back door warning chime D514 5. Back door latch D503 Back door and glass hatch switch
assembly (back door switch) D706 6. Pinch strip LH D517
7. Pinch strip RH D715 8. Glass hatch ajar switch D707 9. Back door close switch B63
10. Intelligent Key unit M70 (view with instrume nt panel RH removed) 11. Combination meter M24
ALKIA0966ZZ
Item
Function
Power liftgate switch Transmits liftgate open operation signal to back door control unit.
Back door control unit Transmits liftgate open operation to liftgate motor.
Back door close switch Transmits back door close signal to back door control unit.
Back door handle switch Transmits back door open signal to back door control unit.
Pinch strip (LH, RH) While closing, reverses door direction to full open position when an obstacle is in the way.
Back door warning chime Announces opening and closing of back door.
Revision: April 20092010 QX56

BACK DOOR OPENER FUNCTIONDLK-33
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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INTELLIGENT KEY
INTELLIGENT KEY : System DiagramINFOID:0000000005146887
INTELLIGENT KEY : System DescriptionINFOID:0000000005146888
The Intelligent Key has the same functions as the remote control entry system. Therefore, it can be used in the
same manner as the remote controller by operating the back door open button.
OPERATION DESCRIPTION/BACK DOOR OPEN FUNCTION
• When back door button of the Intelligent Key is press ed, the back door open signal is transmitted from the
Intelligent Key to the back door control unit via remote keyless entry receiver and the Intelligent Key unit.
• When back door control unit receives the back door open request signal, it operates the back door motor
and opens the liftgate.
OPERATION CONDITION
OPERATION AREA
• Operating Range
• To ensure the Intelligent Key works effectively, use within 80 cm range of each door, however the operable range may differ according to surroundings.
HAZARD AND HORN REMINDER FUNCTION
When doors are locked or unlocked by Intelligent Key. BCM flashes hazard warning lamps as a reminder and
transmits horn chirp signal to IPDM E/R. IPDM E/R sound horns as a reminder.
The hazard and horn reminder has a horn chirp m ode (C mode) and a non-horn chirp mode (S mode).
Operating function of hazard and horn reminder
Hazard and horn reminders do not operate if any door switch is ON (any door is OPEN).
How to change hazard and horn reminder mode
With CONSULT-III
Refer to DLK-55, "
INTELLIGENT KEY : CONSULT-III F unction (BCM - INTELLIGENT KEY)".
Without CONSULT-III
Refer to Owner's Manual for instructions.
LIST OF OPERATION RELATED PARTS
Parts marked with × are the parts related to operation.
ALKIA0704GB
Remote controller operation Operation conditionOperation
Back door open • Press and hold the back door open button for 0.5 second or more Back door opens
C mode S mode
Intelligent Key operation Lock Unlock Back door open Lock Unlock Back door open
Hazard warning lamp flash Twice Once —Twice ——
Horn sound Once— ——— —
Revision: April 20092010 QX56

DLK-34
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR OPENER FUNCTION
Remote keyless entry functions
Intelligent Key
Ignition key
Back door latch
Back door warning chime
Intelligent Key warning buzzer
CAN communication system
Back door control unit
Combination meter
Hazard warning lamps
Horns
IPDM E/R
Back door open function by remote control button
×××× ××
Hazard and horn reminder function ××××××××
Revision: April 20092010 QX56

BACK DOOR OPENER FUNCTIONDLK-35
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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INTELLIGENT KEY : Co mponent Parts LocationINFOID:0000000005380671
ALKIA0965ZZ
Revision: April 20092010 QX56

DLK-36
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR OPENER FUNCTION
INTELLIGENT KEY : Component Description
INFOID:0000000005146890
ALKIA0579ZZ
1. Horn E3 (view with hood open) 2. IPDM E/R E122, E124
(view with cover removed) 3. Horn relay H-1
4. Remote keyless entry receiver M25 (view with instrume nt panel RH removed) 5. Intelligent key warning buzzer E25 6. Combination meter M23, M24
7. Intelligent Key unit M70 (view with instrument panel LH removed) 8. BCM M18, M19, M20
(view with instrument panel LH removed) 9. Steering lock solenoid M15
(view with steering column removed)
10. Key switch and ignition knob switch M12 11. A/T shift selector (park position switch) M203
(view with center console removed)12. Center console area antenna (front)
M210
(view with center console removed)
13. Center console area antenna (rear) M209 14. Overhead console area antenna R210
(view with overhead console removed) 15. Luggage area antenna B76
(view with rear carpet removed)
16. Rear bumper antenna C7 (view with rear bumper removed) 17. Back door latch D503
18. Front outside antenna LH D15
Front outside antenna RH D115
19. Front door request switch LH D16 Front door request switch RH D116 20. Front door lock assembly LH (door un-
lock sensor) D14 21. Front door switch LH B8
RH B108
22. Rear door switch LH B18 RH B116
Revision: April 20092010 QX56