2004 INFINITI QX56 door lock

AUTOMATIC BACK DOOR SYSTEM
BL-105
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Revision: August 20072004 QX56
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 switchBack door
close switch
Operating
directionFully closed →
openFully open →
closedFully closed →
openFully open
→ closedFully closed →
openFully open →
closedFully open →
closed
Disable
switchON or OFF OFF OFF
Vehicle stop
conditionA/T selector
lever in P or N
range and vehi-
cle speed less
than 2 km/h or
ignition switch
in OFF position—A/T selector
lever in P or N
range and vehi-
cle speed less
than 2 km/h or
ignition switch
in OFF position—A/T selector
lever in P or N
range and vehi-
cle speed less
than 2 km/h or
ignition switch
in OFF position——
Battery volt-
ageApprox. 11V or more
Back door
lock status— — — — Unlocked — —
Glass hatch Closed
Items Operation condition Not met case Control
A/T selector lever P positionP or N position with ignition ON
or any position with ignition
OFFOtherContinue power open or close,
but sounds warning chime.
Back door disable switch OFF ON
Cancels power open/close
operation 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 Closed OFFCancels power door open oper-
ation, door will release to man-
ual mode.
Description Operation Control
Back door disable switch turned ONWarning 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 ONWarning chime active and one-way opera-
tion continuous
(Warning chime inactive and door fully
open or fully closed or operating conditions
recovered)Full open: power close operation allowed
Full close: operating conditions not met →
no power open function.
Voltage drop 11 - 9VOne-way operation continued (equivalent
to the case of starting voltage ← 11V for
handle operation with warning chime
active)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 resetControl not possible because microcom-
puter being reset

AUTOMATIC BACK DOOR SYSTEM
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Revision: August 20072004 QX56
Trouble Diagnosis ProcedureEIS002T0
1. Check the symptom and customer's requests.
2. Understand outline of system. Refer to BL-45, "
System Description" .
3. Confirm system operation.
4. Perform self-diagnosis procedures. Refer to BL-115, "
Self-Diagnosis Procedures" .
5. Refer to diagnosis chart by symptom, repair or replace any malfunctioning parts. Refer to BL-116, "
Diag-
nosis Chart" .
6. Inspection End.
Self-Diagnosis ProceduresEIS005X4
INPUT SIGNAL CHECK MODE
Input signal check mode allows testing of switch input signal to the back door control unit.
To activate input signal check mode on the automatic back door, perform the following steps:
1. Turn ignition switch OFF.
2. Turn back door close switch to CANCEL (system cancelled).
3. Place A/T selector lever in P position.
4. Using the inside emergency release lever, open the back door.
5. Have an assistant press and hold the back door handle switch.
6. While the assistant continues to hold the back door handle switch, turn ignition switch ON (DO NOT start
engine).
7. After approximately 5 seconds, the back door warning chime will sound for 0.5 seconds.
8. Release the back door handle switch.
9. Within 8 seconds of the back door warning chime sounding, press and hold the power liftgate switch.
10. After approximately 5 seconds, the back door warning chime will sound for 1 second.
11. Release the power liftgate switch.
12. The input signal check mode is now initialized.
The input signal check mode can test the following inputs. The back door warning chime will sound for approx-
imately 0.5 seconds each time a switch signal input occurs. Use this test when one of these inputs is not
responding during normal automatic back door operation.
*Back door warning chime should sound as soon as vehicle moves.
Turn ignition switch OFF to end input signal check mode.
OPERATING CHECK MODE
Operating check mode allows self-diagnosis of the automatic back door system.
To activate operating check mode on the automatic back door, perform the following steps:
1. Turn ignition switch OFF.
2. Turn back door close switch to CANCEL (system cancelled).
3. Place A/T selector lever in P position.
Switch signal Operation Refer to
Power liftgate switch OFF → ONBL-118
Back door close switch (CLOSE) OFF → ONBL-120
Back door close switch (CANCEL) OFF → ONBL-121
Back door handle switch OFF → ONBL-127
Glass switch OFF → ONBL-36
A/T device (park switch) P position → other than P positionAT- 1 9 1
Vehicle speed* Vehicle speedAT-6 8
Remote keyless entry signal Keyfob switch OFF → ONBL-66
Door lock/unlock signal LOCK → UNLOCKBL-34
Pinch strip LH signal OFF → ONBL-122
Pinch strip RH signal OFF → ONBL-122

DOOR
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DOORPFP:80100
Fitting AdjustmentEIS0 02 T D
FRONT DOOR
Longitudinal clearance and surface height adjustment at front end
1. Remove the front fender. Refer to EI-20, "FRONT FENDER" .
2. Loosen the hinge bolts. Raise the front door at rear end to adjust.
REAR DOOR
Longitudinal clearance and surface height adjustment at front end
1. Remove the center pillar upper finisher. Refer to EI-34, "BODY SIDE TRIM" .
2. Accessing from inside the vehicle, loosen the nuts. Open the rear door, and raise the rear door at rear end
to adjust.
STRIKER ADJUSTMENT
1. Adjust the striker so that it becomes parallel with the lock inser-
tion direction.
WIIA0583E
LIIA1502E

BL-130
DOOR
Revision: August 20072004 QX56
Removal and InstallationEIS0 02 TE
FRONT DOOR
CAUTION:

When removing and installing the door assembly, support the door with a jack and shop cloth to
protect the door and body.

When removing and installing door assembly, be sure to carry out the fitting adjustment.

Check the hinge rotating part for poor lubrication. If necessary, apply "body grease".
1. Remove the front door lock assembly. Refer to BL-132, "
FRONT DOOR LOCK" .
2. Remove the door harness.
3. Remove the check link cover.
4. Remove the bolt from the check link on the door hinge pillar.
5. Remove the door-side hinge nuts and bolts and the door assem-
bly.
Installation is in the reverse order of removal.
REAR DOOR
CAUTION:

When removing and installing the door assembly, support the door with a jack and shop cloth to
protect the door and body.

When removing and installing door assembly, be sure to carry out the fitting adjustment.

Check the hinge rotating part for poor lubrication. If necessary, apply "body grease".
1. Remove the rear door lock assembly. Refer to BL-135, "
REAR DOOR LOCK" .
2. Remove the door harness.
3. Remove the check link cover.
4. Remove the bolt from the check link on the door hinge pillar.
LIIA1503E
LIIA1504E
LIIA1503E

DOOR
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Revision: August 20072004 QX56
5. Remove the door-side hinge nuts and bolts and the door assem-
bly.
Installation is in the reverse order of removal.
BACK DOOR
WA RN ING:
Always support the back door when removing or replacing back door stays. Power back door opener
will not support back door with back door stays removed.
1. Remove the back door glass. Refer to GW-13, "
REAR WINDOW GLASS AND MOLDING" .
2. Remove the license lamp finisher. Refer to EI-24, "
LICENSE LAMP FINISHER" .
3. Remove the back door lock assembly. Refer to BL-136, "
BACK DOOR LOCK" .
4. Remove the rear wiper motor. Refer to WW-51, "
Removal and Installation of Rear Wiper Motor" .
5. Remove the back door wire harness.
6. Remove the rear washer nozzle and hose from the back door. Refer to WW-52, "
Removal and Installation
of Rear Washer Nozzle"
CAUTION:
Two technicians should be used to avoid damaging the back door during removal.
7. Support the back door.
8. Disconnect the power back door lift arm from the door.
9. Remove the back door stays.
10. Remove the door side nuts and the back door assembly.
Installation is in the reverse order of removal.
LIIA1504E
LIIA1898E

BL-132
FRONT DOOR LOCK
Revision: August 20072004 QX56
FRONT DOOR LOCKPFP:80502
Component StructureEIS002TF
Removal and InstallationEIS006BK
REMOVAL
1. Remove the front door glass regulator. Refer to GW-70, "FRONT DOOR GLASS REGULATOR" .
2. Remove the front door window rear glass run.
3. Remove the door side grommet, and the bolt (TORX T30) from
the grommet hole.
4. While pulling the outside handle, remove the door key cylinder
assembly or escutcheon.
1. Grommet 2. Front door striker 3. Door lock assembly
4. Outside handle cable 5. Inside handle assembly 6. Inside handle cable
7. Door lock cable 8. Key cylinder rod (Driver side only) 9. Door lock cylinder
10. Outside handle bracket 11. Front gasket 12. Outside handle
13. Door key cylinder escutcheon
(Driver side) Outside handle
escutcheon (Passenger side)14. Rear gasket
LIIA1728E
Torx bolt 5.3 N·m (0.54 kg-m, 47 in-lb)
PIIA3553E
PIIA3554E

FRONT DOOR LOCK
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Revision: August 20072004 QX56
5. Separate the key cylinder rod from the door key cylinder assembly (if equipped).
6. While pulling the outside handle, slide it toward rear of vehicle to
remove.
7. Remove the front and rear gaskets.
8. Remove the TORX bolts (T30), and the door lock assembly.
9. While pulling the outside handle bracket, slide it toward the rear
of vehicle to remove it and the door lock assembly.
10. Disconnect the door lock actuator electrical connector.
LIIA0532E
PIIA3557E
Door lock assembly bolts 7.5 N·m (0.77 kg-m, 66 in-lb)
PIIA1090E
PIIA3558E

BL-134
FRONT DOOR LOCK
Revision: August 20072004 QX56
11. Separate the outside handle cable connection from the outside
handle bracket.
INSTALLATION
Installation in the reverse order of removal.
CAUTION:
To install each rod, be sure to rotate the rod holder until a click is felt.
Disassembly and AssemblyEIS006BL
DOOR KEY CYLINDER ASSEMBLY
Remove the key cylinder escutcheon pawl and remove the door key cylinder.
PIIA5059E
PIIA4136E