window INFINITI QX56 2009 Factory Service Manual

POWER WINDOW SYSTEMPWC-5
< FUNCTION DIAGNOSIS >
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FUNCTION DIAGNOSIS
POWER WINDOW SYSTEM
System DiagramINFOID:0000000003775960
POWER WINDOW ANTI-PINCH SYSTEM
System DescriptionINFOID:0000000003775961
POWER WINDOW MAIN SWITCH
INPUT/OUTPUT SIGNAL CHART
POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH
INPUT/OUTPUT SIGNAL CHART
ALKIA1301GB
Item Input signal to main power window and
door lock/unlock switch Main power window and door
lock/unlock switch function Actuator
Key cylinder switch LOCK/UNLOCK signal (more than 1.5
seconds over)
Power window controlFront power window motor
Encoder Encoder pulse signal
Main power window
and door lock/unlock
switch
Front power window motor LH UP/
DOWN signal
Power window and
door lock/unlock
switch RH Front power window motor RH UP/
DOWN signal
BCM RAP signal
Rear power window
control unit Rear power window motor UP/DOWN
signal
Rear power window motor
Revision: December 20092009 QX56

PWC-6
< FUNCTION DIAGNOSIS >
POWER WINDOW SYSTEM
REAR POWER WINDOW CONTROL
INPUT/OUTPUT SIGNAL CHART
POWER WINDOW OPERATION
 Power window system is operable during the retained power operation timer after turning ignition switch ON
and OFF.
 Main power window and door lock/unlock switch can open/close all windows.
 Power window and door lock unlock switch RH & rear power window switches LH and RH can open/close the corresponding windows.
REAR POWER VENT WINDOW OPERATION
 Rear power vent window system is operable during the retained power operation timer after turning ignition
switch ON and OFF.
 Rear power vent window switch can open/close the rear power vent window LH and RH.
POWER WINDOW AUTO-OPERATION
 AUTO UP/DOWN operation can be performed when main power window and door lock/unlock switch or
power window and door lock/unlock switch RH turns to AUTO.
 Main power window and door lock/unlock switch controls rear power window LH/RH auto-operation.
 Encoder continues detecting the movement of power window motor and transmits to front power window
switch LH/RH or rear power window control unit LH/RH as the encoder pulse signal while power window
motor is operating.
 Front power window switch LH/RH or rear power window control unit LH/RH reads the changes of encoder
signal and stops AUTO operation when door glass is at fully opened/closed position.
 Power window motor is operable in case encoder is malfunctioning.
RETAINED POWER OPERATION
 Retained power operation is an additional power supply function that enables power window system to oper-
ate during the 45 seconds even when ignition switch is turned OFF
Retained power function cancel conditions
 Front door CLOSE (door switch OFF) →OPEN (door switch ON).
 When ignition switch is ON.
 When timer time passes. (45 seconds)
POWER WINDOW LOCK
The power window lock is designed to lock operation of all windows except for front door window LH.
When in the lock position, the power window lock si gnal is transmitted to power window and door lock/unlock
switch RH and rear power window control unit LH/RH by power window serial link. This prevents the power
window motor from operating.
Item Input signal to front power window
switch Front power window switch
function Actuator
Power window and
door lock/unlock
switch RH Front power window motor RH UP/
DOWN signal
Power window control Front power window motor RH
Encoder Encoder pulse signal
BCM RAP signal
Item Input signal to front power window
switch Front power window switch
function Actuator
Main power window
and door lock/un-
lock switch Rear power window motor LH/RH UP/
DOWN signal
Power window control Rear power window motor LH/RH
Rear power window
switch LH/RH
Rear power window motor LH/RH UP/
DOWN signal
Rear power window
control unit LH/RH Rear power window
motor control LH
RH UP/DOWN signal
Encoder Encoder pulse signal
BCM Power window serial link signal
Revision: December 20092009 QX56

POWER WINDOW SYSTEMPWC-7
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ANTI-PINCH OPERATION
 Pinch foreign material in the door glass during AUTO-U P operation, and it is the anti-pinch function that low-
ers the door glass 150 mm (5.91 in) or 2 seconds when detected.
 Encoder continues detecting the movement of power window motor and transmits to power window switch
as the encoder pulse signal while power window motor is operating.
 Resistance is applied to the power window motor ro tation that changes the frequency of encoder pulse sig-
nal if foreign material is trapped in the door glass.
 Front power window switch LH/RH and rear power wi ndow control unit LH/RH controls to lower the window
glass for 150 mm (5.91 in) or 2 seconds after it detects encoder pulse signal frequency change.
OPERATION CONDITION
 When all door glass AUTO-UP operation is performed ( anti-pinch function does not operate just before the
door glass closes and is fully closed)
NOTE:
Depending on environment and driving conditions, if a similar impact or load is applied to the door glass, it
may lower.
KEY CYLINDER SWITCH OPERATION
Hold the door key cylinder to the LOCK or UNLOCK direction for more than 1 second to OPEN or CLOSE front
power windows when ignition switch is OFF. In addition, it stops when key position is moved to NEUTRAL
when operating.
OPERATION CONDITION
 Ignition switch OFF
 Hold door key cylinder to LOCK position for more than 1 second to perform CLOSE operation of the door
glass.
 Hold door key cylinder to UNLOCK position for more than 1 second to perform OPEN operation of the door glass.
KEYLESS POWER WINDOW DOWN OPERATION
Front power windows open when the unlock button on Intelli gent Key is activated and kept pressed for more
than 3
(NOTE) seconds with the ignition switch OFF. The wi ndows keep opening if the unlock button is continu-
ously 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.
While retained power operation is activated, ke yless power window down function cannot be operated.
NOTE:
Keyless power window down operation mode can be changed by “PW DOWN SET” mode in “WORK SUP-
PORT”. Refer to DLK-56, "CONSULT-III F unction (INTELLIGENT KEY)"
.
NOTE:
Use CONSULT-III to change settings.
MODE1 (3sec)/MODE2 (OFF)/MODE3 (5sec)
Revision: December 20092009 QX56

PWC-8
< FUNCTION DIAGNOSIS >
POWER WINDOW SYSTEM
Component Parts Location
INFOID:0000000003775962
Component DescriptionINFOID:0000000003775963
POWER WINDOW ANTI-PINCH SYSTEM
ALKIA1893GB
1. A. Steering column B. BCM M18, M19, M20 (view with
instrument panel removed) 2. A. Main power window and door
lock/unlock switch D7, D8
Power window and door lock/unlock
switch RH D105
B. Front door switch LH B8, RH B108
C. Front power win dow motor LH D9,
RH D104
D. Front door lock assembly LH (key
cylinder switch) D14 3. A. Rear power window switch LH
D203, RH D303
Rear power window control unit LH
D209, RH D309
B. Rear power window motor LH
D204, RH D304
4. A. Rear power vent window relay (CLOSE) M89
B. Rear power ve nt window relay
(OPEN) M87 5. Rear power vent window switch M95 6. A. Rear power vent window motor
LH B52, RH B150
B. Condenser-3 B119
Condenser-4 B120
Component Function
BCM  Supplies power supply to power window switch.
 Controls retained power.
Main power window and door lock/un-
lock switch  Directly controls all power window motor of all doors.
 Controls anti-pinch operation of front power window LH.
Power window and door lock/unlock
switch RH  Controls front power window motor RH.
 Controls anti-pinch operation of front power window RH.
Rear power window switch  Controls rear power window control units LH and RH.
Rear power window control unit  Controls rear power window motors LH and RH.
 Controls anti-pinch operation of rear power window LH/RH.
Revision: December 20092009 QX56

POWER WINDOW SYSTEMPWC-9
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Front power window motor LH  Integrates the ENCODER POWER and WINDOW MOTOR.
 Starts operating with signals from main power window and door lock/unlock switch.
 Transmits power window motor rotation as a pulse signal to main power window and
door lock/unlock switch.
Front power window motor RH Starts operating with signals from main power window and door lock/unlock switch &
power window and door lock/unlock switch RH.
Rear power window motor Starts operating with signals from main power window and door lock/unlock switch &
rear power window switch.
Front door lock assembly LH (key cylin-
der switch) Transmits operation condition of key cylinder switch to power window main switch.
Front door switch LH or RH Detects door open/close condition and transmits to BCM. Component Function
Revision: December 20092009 QX56

PWC-10
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000004064497
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
RETAINED PWR
RETAINED PWR : CONSULT-III Function (BCM - RETAINED PWR)INFOID:0000000004064498
Data monitor
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by BCM. Refer to BCS-51, "DTC Index"
.
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from BCM.
DATA MONITOR The BCM input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from BCM.
ECU IDENTIFICATION The BCM part number is displayed.
CONFIGURATION  Enables to read and save the vehicle specification.
 Enables to write the vehicle specification when replacing BCM.
System Sub system selection item Diagnosis mode
WORK SUPPORT DATA MONITOR ACTIVE TEST
BCM BCM ×
Door lock DOOR LOCK ×××
Rear window defo gger REAR DEFOGGER ×
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Remote keyless entry system MULTI REMOTE ENT ××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ××
Air conditioner AIR CONDITONER ×
Intelligent Key system INTELLIGENT KEY ×
Combination switch COMB SW ×
Immobilizer IMMU ××
Interior room lamp battery saver BATTERY SAVER ×××
Back door open TRUNK ××
RAP (retained accessory power) RETAINED PWR ×××
Signal buffer system SIGNAL BUFFER ××
TPMS (tire pressure monitoring sys-
tem) AIR PRESSURE MONITOR
×××
Vehicle security system PANIC ALARM ×
Revision: December 20092009 QX56

PWC-12
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
COMPONENT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
POWER WINDOW MAIN SWITCH
POWER WINDOW MAIN SWITCH : DescriptionINFOID:0000000003775966
 BCM supplies power.
 It operates each power window motor via corresponding power window switch and makes window move up/down when main power window and door lock/unlock switch is operated.
POWER WINDOW MAIN SWITCH : Component Function CheckINFOID:0000000003775967
Main Power Window And Door Lock/Unlock Switch
1. CHECK MAIN POWER WINDOW AND DO OR LOCK/UNLOCK SWITCH FUNCTION
Does power window motor operate with main power window and door lock/unlock switch operation?
Is the inspection result normal?
YES >> Main power window and door lock/unlock switch power supply and ground circuit are OK.
NO >> Refer to PWC-12, "POWER WI NDOW MAIN SWITCH : Diagnosis Procedure"
.
POWER WINDOW MAIN SWITCH : Diagnosis ProcedureINFOID:0000000003775968
Main Power Window And Door Lock/Unlo ck Switch Power Supply Circuit Check
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between main power window and door lock/ unlock switch connectors and ground.
Is the measurement value within the specification?
YES >> GO TO 3
NO >> GO TO 2
2. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and main power window and door lock/unlock switch.
3. Check continuity between BCM connector and main power win- dow and door lock/unlock switch connectors.
4. Check continuity between BCM connector and ground.
Te r m i n a l Voltage (V)(Approx.)
(+)
(–)
Main power window and
door lock/unlock switch connector Te r m i n a l
D7 (A) 10 Ground Battery voltage
D8 (B) 19
ALKIA0273ZZ
BCM connector Terminal Main power window and
door lock/unlock switch
connector Terminal Continuity
M20 (A) 68 D7 (B) 10
Ye s
69 D8 (C) 19
LIIA2215E
Revision: December 20092009 QX56

POWER SUPPLY AND GROUND CIRCUITPWC-13
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Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch.
3. Check continuity between main power window and door lock/ unlock switch connector and ground.
Is the inspection result normal?
YES >> Replace main power window and door lock/unlock switch. Refer to PWC-117, "Removal and Installation"
.
NO >> Repair or replace harness.
4. CHECK BCM OUTPUT SIGNAL
1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector and ground.
Is the measurement value within the specification?
YES >> Replace BCM. Refer to BCS-56, "Removal and Installation".
NO >> Repair or replace harness.
FRONT POWER WINDOW SWITCH
FRONT POWER WINDOW SWITCH : DescriptionINFOID:0000000003775969
 BCM supplies power.
 Front power window motor RH will be operated if power window and door lock/unlock switch RH is operated.
FRONT POWER WINDOW SWITCH : Component Function CheckINFOID:0000000003775970
Power Window And Door Lock/Unlock Switch RH
1. CHECK FRONT POWER WINDOW MOTOR RH FUNCTION
Does front power window motor RH operate with power window and door lock/unlock switch RH operation?
Is the inspection result normal?
YES >> Power window and door lock/unlock switch RH power supply and ground circuit are OK.
NO >> Refer to PWC-13, "FRONT POWER WINDO W SWITCH : Diagnosis Procedure"
.
FRONT POWER WINDOW SWITCH : Diagnosis ProcedureINFOID:0000000003775971
Power Window And Door Lock/Unlock Switch RH Power Supply Circuit Check
BCM connector Terminal
GroundContinuity
M20 (A) 68
No
69
Main power window and door lock/
unlock switch connector Te r m i n a l
GroundContinuity
D8 17 Yes
ALKIA0275ZZ
Te r m i n a l s Voltage (V)
(Approx.)
(+)
(–)
BCM connector Terminal
M20 68
Ground Battery voltage
69
LIIA0917E
Revision: December 20092009 QX56

PWC-14
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between power window and door lock/unlock switch RH connector and ground.
Is the measurement value within the specification?
YES >> GO TO 3
NO >> GO TO 2
2. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and power window and door lock/unlock switch RH.
3. Check continuity between BCM connector and power window and door lock/unlock switch RH connector.
4. Check continuity between BCM connector and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect power window and door lock/unlock switch RH.
3. Check continuity between power window and door lock/unlock switch RH connector and ground.
Is the inspection result normal?
YES >> Replace power window and door lock/unlock switch RH. Refer to PWC-118, "Removal and Installation"
.
NO >> Repair or replace harness.
4. CHECK BCM OUTPUT SIGNAL
Te r m i n a l
Voltage (V)(Approx.)
(+)
(–)
Power window and door lock/
unlock
switch RH connector Te r m i n a l
D105 10 Ground Battery voltage
ALKIA0301ZZ
BCM connector Terminal Power window and
door lock/unlock
switch RH connector Terminal Continuity
M20 (A) 69 D105 (B) 10 Yes
BCM connector Terminal GroundContinuity
M20 (A) 69 No
LIIA2364E
Power window and door lock/unlock switch RH Te r m i n a l
Ground Continuity
D105 11 Yes
ALKIA0303ZZ
Revision: December 20092009 QX56

POWER SUPPLY AND GROUND CIRCUITPWC-15
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1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector and ground.
Is the measurement value within the specification?
YES >> Replace power window and door lock/unlock switch RH.
Refer to PWC-118, "Removal and Installation"
.
NO >> Replace BCM. Refer to BCS-56, "Removal and Installation"
.
REAR POWER WINDOW SWITCH
REAR POWER WINDOW SWITCH : DescriptionINFOID:0000000003775972
 BCM supplies power.
 Rear power window motor will be operated if rear power window switch is operated. Rear power window\
switch.
REAR POWER WINDOW SWITCH : Component Function CheckINFOID:0000000003775973
Rear Power Window Switch
1. CHECK REAR POWER WINDOW MOTOR FUNCTION
Does rear power window motor operate with rear power window switch operation?
Is the inspection result normal?
YES >> Rear power window switch power supply and ground circuit are OK.
NO >> Refer to PWC-15, "REAR POWER WINDOW SWITCH : Diagnosis Procedure"
.
REAR POWER WINDOW SWITCH : Diagnosis ProcedureINFOID:0000000003775974
Rear Power Window Switch Power Supply Circuit Check
1. CHECK POWER WINDOW POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power window switch LH or RH.
3. Turn ignition switch ON.
4. Check voltage between rear power window switch LH or RH connector D203 (LH), D303 (RH) terminals 2, 3 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace harness.
2. CHECK POWER WINDOW GROUND CIRCUIT
Te r m i n a l s Voltage (V)
(Approx.)
(+)
(-)
BCM connector Terminal
M20 69 Ground Ba ttery voltage
WIIA0508E
2 - Ground : Battery voltage
3 - Ground : Battery voltage
LIIA1348E
Revision: December 20092009 QX56