2011 INFINITI QX56 door lock

COMPONENT PARTSPWC-7
< SYSTEM DESCRIPTION >
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Component DescriptionINFOID:0000000006217265
Component Function
BCM  Supplies power supply to power window switch.
 Controls retained power.
Power window main switch  Directly controls all power window motor of all doors.
 Controls anti-pinch operation of power window.
Front power window switch
(passenger side)  Controls anti-pinch operation of power window.
 Controls power window motor of passenger door.
Rear power window switch  Controls anti-pinch operation of power window.
 Controls power window motor of rear right and left doors.
Power window motor  Integrates the ENCODER and WINDOW MOTOR.
 Starts operating with signals from each power window switch.
 Transmits power window motor rotation as a pulse signal to power window switch.
Remote keyless entry receiver Receives lock/unlock signal from the intelligent key, and then transmits to BCM.
Front door lock assembly (door key cyl-
inder switch) Transmits operation condition of door key cylinder switch to power window main switch.
Front door switch (driver side/passen-
ger side) Front door open/close condition and transmits to BCM.
Revision: 2010 May2011 QX56

PWC-8
< SYSTEM DESCRIPTION >
SYSTEM
SYSTEM
System DiagramINFOID:0000000006217266
System DescriptionINFOID:0000000006217267
POWER WINDOW OPERATION
 Power window system is activated by power window switch operation when ignition switch turns ON, or dur-
ing the retained power operation after ignition switch turns OFF.
 Power window main switch can open/close door glass.
 Front and rear power window switch can open/close the corresponding door glass.
 Power window lock switch can lock all power windows other than driver seat.
 All power windows close when pressing Intelligent Ke y lock button or unlock button for 3 seconds.
 If door glass receives resistance that is the specifi ed value or more while power window of each seat is in
AUTO-UP operation, power window operates in the reverse direction.
 Power window serial link transmits the signals from power window main switch to each power window switch.
 AUTO-UP/DOWN operation can be performed when front power window switch turns to AUTO.
POWER WINDOW AUTO-OPERATION
 AUTO-UP/DOWN operation can be performed when each power window motor turns to AUTO.
 Encoder continues detecting the movement of power window motor and output the encoder pulse signal to
power window switch while power window motor is operating.
 Power window switch 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.
 AUTO function does not operate if encoder is malfunctioning.
POWER WINDOW SERIAL LINK
Power window main switch, front power window switch (passenger side), rear power window switch LH/RH
and BCM transmit and receive the signal by power window serial link.
JMKIA5147GB
Revision: 2010 May2011 QX56

SYSTEMPWC-9
< SYSTEM DESCRIPTION >
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The signal mentioned below is transmitted from BCM to power window main \
switch, front power window
switch (passenger side) and rear power window switch LH/RH.
 Keyless power window down signal
 Door switch signal
The signal mentioned below is transmitted from power window main switch to front power window switch (pas-
senger side) and rear power window switch LH/RH.
 Front passenger side door window and rear door window operation signal
 Power window control by door key cylinder switch signal
 Power window lock switch signal
 Retained power operation signal
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 again.
 When timer time passes. (45 seconds)
POWER WINDOW LOCK FUNCTION
Ground circuit inside power window main switch shuts off when power window lock switch is ON. This inhibits
power window switch operation except with the power window main switch.
ANTI-PINCH OPERATION
 Anti-pinch foreign lowers door glass 150 mm (5.9 in) when foreign material is pinched in door glass during
AUTO-UP operation.
 Encoder continues detecting the movement of power window motor and output the encoder pulse signal to
power window switch l 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.
 Power window switch controls to lower the door glass for 150 mm (5.9 in) after it detects encoder pulse sig-
nal 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.
DOOR KEY CYLINDER SWITCH OPERATION
Hold the door key cylinder to the LOCK or UNLOCK direct ion for 1.5 seconds or more to OPEN or CLOSE all
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 1.5 se conds or more to perform CLOSE operation of the door
glass.
 Hold door key cylinder to UNLOCK position for 1.5 se conds or more to perform OPEN operation of the door
glass.
KEYLESS POWER WINDOW DOWN FUNCTION
All power windows open when the unlock button on Intelligent Key is activated and kept pressed for more than
3 seconds with the ignition switch OFF. The wi ndows 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.
While retained power operation activate, keyless power window down function cannot be operated.
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (BCM)PWC-11
< SYSTEM DESCRIPTION >
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DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu nction (BCM - COMMON ITEM)INFOID:0000000006217269
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.
×: Applicable item
*: This item is indicated, but not used.
FREEZE FRAME DATA (FFD)
The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT-III.
Diagnosis mode Function Description
Work Support Changes the setting for each system function.
Self Diagnostic Result Displays the diagnosis results judged by BCM. Refer to BCS-57, "
DTCIndex".
CAN Diag Support Monitor Monitors the reception status of CAN communication viewed from BCM. Refer to CONSULT-III opera-
tion manual.
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  Read and save the vehicle specification.
 Write the vehicle specification when replacing BCM.
System Sub system selection item Diagnosis mode
Work Support Data Monitor Active Test
Door lock DOOR LOCK ×××
Rear window defo gger REAR DEFOGGER ××
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ×××
— AIR CONDITONER* ××
 Intelligent Key system
 Engine start system INTELLIGENT KEY
×××
Combination switch COMB SW ×
Body control system BCM ×
NATS IMMU ×××
Interior room lamp battery saver BATTERY SAVER ×××
Back door TRUNK ×
Vehicle security system THEFT ALM ×××
RAP system RETAINED PWR ×
Signal buffer system SIGNAL BUFFER ××
Revision: 2010 May2011 QX56

PWC-12
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
RETAIND PWR
RETAIND PWR : CONSULT-III Function (BCM - RETAINED PWR)INFOID:0000000006217270
Data monitor
CONSULT screen item Indication/Unit Description
Vehicle Speed km/h Vehicle speed of the moment a particular DTC is detected
Odo/Trip Meter km Total mileage (Odometer value) of the moment a particular DTC is detected
Vehicle Condition SLEEP>LOCK
Power position status of
the moment a particular
DTC is detected While turning BCM status from low power consumption mode to
normal mode (Power supply position is “LOCK”)
SLEEP>OFF While turning BCM status from low power consumption mode to
normal mode (Power supply position is “OFF”.)
LOCK>ACC While turning power supply position from “LOCK” to “ACC”
ACC>ON While turning power supply position from “ACC” to “IGN”
RUN>ACC While turning power supp
ly position from “RUN” to “ACC” (Vehicle
is stopping and selector lever is except P position.)
CRANK>RUN While turning power su
pply position from “CRANKING” to “RUN”
(From cranking up the engine to run it)
RUN>URGENT While turning power supply positi
on from “RUN“ to “ACC” (Emer-
gency stop operation)
ACC>OFF While turning power supply position from “ACC” to “OFF”
OFF>LOCK While turning power supply position from “OFF” to “LOCK”
OFF>ACC While turning power supply position from “OFF” to “ACC”
ON>CRANK While turning power supply position from “IGN” to “CRANKING”
OFF>SLEEP While turning BCM status from normal mode (Power supply posi-
tion is “OFF”.) to low power consumption mode
LOCK>SLEEP While turning BCM status from normal mode (Power supply posi-
tion is “LOCK”.) to low power consumption mode
LOCK Power supply position is “LOCK”
(Ignition switch OFF with steer-
ing is locked.)
OFF Power supply position is “OFF” (Ignition switch OFF with steering
is unlocked.)
ACC Power supply position is “ACC” (Ignition switch ACC)
ON Power supply position is “IGN” (Ignition switch ON with engine
stopped)
ENGINE RUN Power supply position is “RUN” (Ignition switch ON with engine
running)
CRANKING Power supply position is “CRANKING” (At engine cranking)
IGN Counter 0 - 39 The number of times that ignition switch is turned ON after DTC is detected
 The number is 0 when a malfunction is detected now.
 The number increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition
whenever ignition switch OFF → ON.
 The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.
Monitor Item Description
DOOR SW-DR Indicates [ON/OFF] condition of driver side door switch.
DOOR SW-AS Indicates [ON/OFF] condition of passenger side door switch.
Revision: 2010 May2011 QX56

PWC-14
< ECU DIAGNOSIS INFORMATION >
POWER WINDOW MAIN SWITCH
POWER WINDOW MAIN SWITCH
Reference Value INFOID:0000000006217272
TERMINAL LAYOUT
PHYSICAL VALUES
POWER WINDOW MAIN SWITCH
LIIA2455E
Te r m i n a l N o .(wire color) Description
ConditionVoltage [V]
(Approx.)
+ - Signal name Input/
Output
2
(W/B) Ground Encoder ground — — 0
4
(R) Ground Door key cylinder switch
LOCK signal
InputKey position
(Neutral
→Locked) 5
→ 0
6
(W) Ground
Door key cylinder switch UN-
LOCK signal Input
Key position
(Neutral
→Unlocked) 5
→ 0
8
(L) Ground Front driver side power win-
dow motor UP signal
OutputWhen front LH switch in
power window main
switch is
operated UP 12
9
(G/W) Ground Encoder pulse signal 2 Input When power window mo-
tor operates.
10
(Y) Ground Retained power signal Input IGN SW ON 12
Within 45 second after ig-
nition switch is turned to
OFF
12
When driver side or pas-
senger side door is
opened during retained
power operation 0
11
(G) Ground
Front driver side power win-
dow motor DOWN signal OutputWhen front LH switch in
power window main
switch is
operated DOWN 12
JMKIA0070GB
Revision: 2010 May2011 QX56

DOOR KEY CYLINDER SWITCHPWC-53
< DTC/CIRCUIT DIAGNOSIS >
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DOOR KEY CYLINDER SWITCH
Component Function CheckINFOID:0000000006217309
1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
Check (“KEY CYL LK-SW”, “KEY CYL UN-SW”) in “D ATA MONITOR” mode for “POWER DOOR LOCK SYS-
TEM” with CONSULT-III. Refer to DLK-39, "
DOOR LOCK : CONSULT-III Function (BCM - DOOR LOCK)".
Is the inspection result normal?
YES >> Door key cylinder switch is OK.
NO >> Refer to PWC-53, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006217310
1.CHECK DOOR KEY CYLINDER SWITCH SIGNAL
1. Turn ignition switch OFF.
2. Disconnect front door lock assembly (driver side) (door key cylinder switch) connect.
3. Turn ignition switch ON.
4. Check voltage between front door lock assembly (dri ver side) (door key cylinder switch) harness connec-
tor and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK DOOR KEY CYLINDER SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect power window main switch connector.
3. Check continuity between power window main switch harness connector and front door lock assembly (driver side) (door key cylinder switch) harness connector.
4. Check continuity between power window main switch harness connector and ground.
Monitor item Condition
KEY CYL LK-SW Lock : ON
Neutral / Unlock : OFF
KEY CYL UN-SW Unlock : ON
Neutral / Lock : OFF
(+)
(–)Voltage (V)
(Approx.)
Front door lock assembly (driver side) (door key cylinder
switch)
Connector Terminal
D9 5
Ground 5
6
Power window main switch Front door lock assembly
(driver side) (door key cyl-
inder switch) Continuity
Connector Terminal Connector Terminal
D5 4
D9 6
Existed
65
Revision: 2010 May2011 QX56

PWC-54
< DTC/CIRCUIT DIAGNOSIS >
DOOR KEY CYLINDER SWITCH
Is the inspection result normal?
YES >> Replace power window main switch. Refer to PWC-74, "Removal and Installation".
NO >> Repair or replace harness.
3.CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT
Check continuity between front door lock assembly (d river side) (door key cylinder switch) harness connector
and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness.
4.CHECK DOOR KEY CYLINDER SWITCH
Check front door lock assembly (driver side) (door key cylinder switch).
Refer to PWC-54, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace front door lock assembly (driver side) (door key cylinder switch). Refer to DLK-240,
"DOOR LOCK : Removal and Installation".
5.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006217311
COMPONENT INSPECTION
1.CHECK DOOR DOOR KEY CYLINDER SWITCH
1. Turn ignition switch OFF.
2. Disconnect front door lock assembly (drive r side) (door key cylinder switch) connector.
3. Check front door lock assembly (driver side) (door key cylinder switch).
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace front door lock assembly (driver side) (door key cylinder switch). Refer to DLK-240,
"DOOR LOCK : Removal and Installation".
Power window main switch
GroundContinuity
Connector Terminal
D5 4
Not existed
6
Front door lock assembly (driver side) (door key cylinder switch)
GroundContinuity
Connector Terminal
D9 4 Existed
Front door lock assembly (driver side) (door key cylinder switch)
Key position Continuity
Te r m i n a l
5 4Unlock Existed
Neutral / Lock Not existed
6 Lock Existed
Neutral / Unlock Not existed
Revision: 2010 May2011 QX56