INFINITI QX56 2008 Factory Service Manual

DLK-18
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK FUNCTION
• To ensure the Intelligent Key works effectively, us
e within 80 cm range of each doors, however the operable
range may differ according to surroundings.
SELECTIVE UNLOCK FUNCTION
When a LOCK signal is transmitted from Intelligent Key, all doors will be locked.
When an UNLOCK signal is transmitted from Inte lligent Key once, driver's door will be unlocked.
Then, if an UNLOCK signal is transmitted from Intell igent Key again within 5 seconds, all other doors will be
unlocked.
When a liftgate signal is transmitted from Intelligent Key for more than 0.5 second, the back door operates to
the full open position. After opening, another signal will cause the back door to close.
HAZARD AND HORN REMINDER FUNCTION
When doors are locked or unlocked by Intelligent Key, BCM flashes hazard warning lamps as a reminder and
sends horn chirp signal to IPDM E/R. IPDM E/R sounds horn as a reminder.
The hazard and horn reminder has a horn chirp mode (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-51, "
INTELLIGENT KEY : CONSULT-III Function (BCM - INTELLIGENT KEY)".
Without CONSULT-III
Refer to Owner's Manual for instructions.
AUTO DOOR LOCK FUNCTION
Auto Door Lock Function
When all doors are locked, ignition switch is OFF (ignition switch is not pressed) and key switch is OFF, doors
are unlocked with Intelligent Key button. When BCM does not receive the following signals within 30 seconds,
all doors are locked.
• Door switch is ON (door is opened)
• Door is locked
• Ignition switch is ON
• Key switch is ON (mechanical key is inserted in ignition key cylinder)
Auto door lock mode can be changed by DOOR LOCK -UNLOCK SET mode in “WORK SUPPORT”. Refer to
DLK-48, "
DOOR LOCK : CONSULT-III Function (BCM - DOOR LOCK)".
PANIC ALARM FUNCTION
When ignition switch is OFF (ignition switch is not pr essed) and key switch is OFF, BCM receives PANIC
ALARM signal from Intelligent Key through the remote keyless entry receiver and the Intelligent Key unit.
BCM turns on and off headlamp intermittently and transmits theft warning horn signal to IPDM E/R. Then,
IPDM E/R turns on and off horn intermittently.
The headlamp flashes and the horn sounds intermittently.
The alarm automatically turns off:
• After 25 seconds
• When BCM receives any signal from Intelligent Key
Panic alarm function mode can be changed by PANIC ALARM SET mode in “WORK SUPPORT”. Refer to
DLK-51, "
INTELLIGENT KEY : CONSULT-III Function (BCM - INTELLIGENT KEY)".
KEYLESS POWER WINDOW DOWN (OPEN) FUNCTION
Front power windows (with left and right front power window anti-pinch system) open when the unlock button
on Intelligent Key is activated and kept pressed for more than 3 seconds with the ignition switch OFF. The win-
dows keep opening if the unlock button is continuously pressed.
The power window opening stops when the following operations are performed:
• When the unlock button is kept pressed more than 15 seconds.
• When the ignition switch is turned ON while the power window opening is operated.
• When the unlock button is released.
C mode S mode
Intelligent Key operation Lock UnlockBack door
open Lock Unlock Back door
open
Hazard warning lamp flashTwice Once —Twice ——
Horns sound Once—————
Revision: March 2010 2008 QX56

DOOR LOCK FUNCTIONDLK-19
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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While retained power operation activate, Keyless power window down (open) function cannot be operated.
Keyless power window down operation mode can be changed by PW DOWN SET mode in “WORK SUP-
PORT”. Refer to DLK-51, "
INTELLIGENT KEY : CONSULT-III Function (BCM - INTELLIGENT KEY)".
ROOM LAMP ILLUMINATION OPERATION
When the following conditions are met:
• Condition of interior lamp switch is in DOOR position
• Door switch OFF (all the doors are closed)
Intelligent Key system turns on interior lamp (for 30 seconds) by receiving UNLOCK signal from Intelligent
Key. For detailed description, refer to DLK-17, "
INTELLIGENT KEY : System Description".
LIST OF OPERATION RELATED PARTS
Parts marked with × are the parts related to operation.
Remote keyless entry functions
Intelligent Key
Intelligent Key unit
Key switch and ignition knob switch
Door request switch (Driver, Passenger)
Door switch
Door lock actuator
Intelligent Key warning buzzer
CAN communication system
BCM
Combination meter
Hazard warning lamps
Horn
IPDM E/R
Head lamp
Door lock/unlock function by remote control button ××× ×× ××
Hazard and horn reminder function ×××××××××
Selective unlock function ×× ×× ××
Keyless power window down (open) function ×××××
Auto door lock function ××× × ××
Panic alarm function ×× ××× ×××
Revision: March 2010 2008 QX56

DLK-20
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK FUNCTION
INTELLIGENT KEY : Component Parts Location
INFOID:0000000004884054
ALKIA0965ZZ
Revision: March 2010 2008 QX56

DOOR LOCK FUNCTIONDLK-21
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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INTELLIGENT KEY : Co mponent DescriptionINFOID:0000000001538917
ALKIA0579ZZ
1. Horn E3
(view with hood open) 2. IPDM E/R E122, E124
(view with co ver 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. Inside key antenna 3 (front of center
console) M210
(view with center console removed)
13. Inside key antenna 1 (rear of center con- sole) M209 14. Inside key antenna 4 (overhead console
area) R210
(view with overhead console removed) 15. Inside key antenna 2 (luggage com-
partment) 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: March 2010 2008 QX56

DLK-22
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK FUNCTION
Item
Function
BCM Controls the door lock function and room lamp function.
Door lock actuator Receives lock/unlock signal from BCM and locks/unlocks each door.
Remote keyless entry receiver Receives lock/unlock signal from the Intelligent Key, and then transmits to Intelligent Key unit.
Intelligent Key Transmits button operation to remote keyless entry receiver.
Intelligent Key unit Receives button operation from remote keyless entry receiver and transmits to BCM.
Intelligent key warning buzzer Warns the user of the lock/unlock condition and inappropriate operations with the buzzer sound.
Revision: March 2010 2008 QX56

BACK DOOR OPENER FUNCTIONDLK-23
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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BACK DOOR OPENER FUNCTION
BACK DOOR OPENER SWITCH
BACK DOOR OPENER SWITCH : System DiagramINFOID:0000000001538918
BACK DOOR OPENER SWITCH : System DescriptionINFOID:0000000001538919
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: March 2010 2008 QX56

DLK-24
< 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 shift 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 shift 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 shift selector lever (P)
position 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: March 2010 2008 QX56

BACK DOOR OPENER FUNCTIONDLK-25
< 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: March 2010 2008 QX56

DLK-26
< 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 shift selec-
tor lever in P or
N range and ve-
hicle speed less than 2 km/h or ignition switch
in OFF position —A/T shift selec-
tor lever in P or
N range and ve-
hicle speed less than 2 km/h or ignition switch
in OFF position —A/T shift selec-
tor lever in P or
N range and ve- hicle 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 shift selector lever P posi-
tion 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 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 shift selector lever P or N position with
ignition 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: March 2010
2008 QX56

BACK DOOR OPENER FUNCTIONDLK-27
< 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 shift 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: March 2010
2008 QX56