2008 INFINITI QX56 air condition

PWC-10
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000004874941
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:0000000004874944
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-50, "
DTCIndex".
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 defogger 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 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: March 2010 2008 QX56

PWC-16
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power window switch LH or RH.
3. Check continuity between rear power window switch LH or RHconnector D203 (LH), D303 (RH) terminals 1, 7 and ground.
OK or NG
OK >> GO TO 3
NG >> Repair or replace harness.
3. CHECK REAR POWER WINDOW SWITCH
Check rear power window switch.
Refer to PWC-16, "
REAR POWER WINDOW SWITCH : Component Inspection".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident".
NO >> Replace rear power window switch. Refer to PWC-117, "
Removal and Installation".
REAR POWER WINDOW SWITCH : Component InspectionINFOID:0000000001735660
COMPONENT INSPECTION
1.CHECK REAR POWER WINDOW SWITCH
Check rear power window switch.
Is the inspection result normal?
YES >> Rear power window switch is OK.
NO >> Replace rear power window switch. Refer to PWC-117, "
Removal and Installation".
1 - Ground : Continuity should exist.
7 - Ground : Continuity should exist.
LIIA2044E
Terminal Power window switch condition Continuity
25 UP
Ye s
14
14
NEUTRAL
15
24 DOWN
15
ALKIA0289ZZ
Revision: March 2010 2008 QX56

PWC-18
< COMPONENT DIAGNOSIS >
POWER WINDOW MOTOR
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK POWER WINDOW MOTOR
Check front power window motor LH.
Refer to PWC-18, "
DRIVER SIDE : Component Inspection".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident".
NO >> Replace power window motor LH. Refer to GW-9, "
Removal and Installation".
DRIVER SIDE : Component InspectionINFOID:0000000001735664
COMPONENT INSPECTION
1. CHECK FRONT POWER WINDOW MOTOR LH
Does motor operate by connecting the battery voltage directly to power window motor?
Is the inspection result normal?
YES >> Front power window motor LH is OK.
NO >> Replace front power window motor LH. Refer to GW-9, "
Removal and Installation".
PASSENGER SIDE
PASSENGER SIDE : DescriptionINFOID:0000000001735665
Door glass moves UP/DOWN by receiving the signal from main power window and door lock/unlock switch or
power window and door lock/unlock switch RH.
PASSENGER SIDE : Component Function CheckINFOID:0000000001735666
1. CHECK POWER WINDOW MOTOR CIRCIUT
Does power window motor operate with operating main power window and door lock/unlock switch or power
window and door lock/unlock switch RH?
Is the inspection result normal?
YES >> Front power window motor RH is OK.
NO >> Refer to PWC-18, "
PASSENGER SIDE : Diagnosis Procedure".
PASSENGER SIDE : Diagnosis ProcedureINFOID:0000000001735667
Front Power Window Mo tor RH Circuit Check
1. CHECK FRONT POWER WINDOW SWITCH RH OUTPUT SIGNAL
Main power window and door
lock/unlock switch connector Te r m i n a l
GroundContinuity
D7 (A) 8
No
11
Te r m i n a l Motor condition
(+) (–)
12 D OW N
21 U P
Revision: March 2010 2008 QX56

POWER WINDOW MOTORPWC-19
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
1. Disconnect front power window motor RH.
2. Turn ignition switch ON.
3. Check voltage between front power window motor RH connector and ground.
Is the measurement value within the specification?
YES >> GO TO 2
NO >> Replace power window and door lock/unlock switch RH. Refer to PWC-116, "
Removal and Instal-
lation".
2. CHECK HARNESS CONTINUITY
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 (A) and front power window motor RH con-
nector (B).
4. Check continuity between power window and door lock/unlock switch RH connector (A) and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK FRONT POWER WINDOW MOTOR RH
Check front power window motor RH.
Refer to PWC-19, "
PASSENGER SIDE : Component Inspection".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident".
NO >> Replace front power window motor RH. Refer to GW-9, "
Removal and Installation".
PASSENGER SIDE : Component InspectionINFOID:0000000001735668
COMPONENT INSPECTION
1. CHECK FRONT POWER WINDOW MOTOR RH
Does motor operate by connecting the battery voltage directly to front power window motor RH?
Te r m i n a l Front power
window motor RH condition Voltage (V)
(Approx.)
(+)
(–)
Front power window
motor RH connector Te r m i n a l
D104 2
Ground UP Battery voltage
DOWN 0
1 UP
0
DOWN Battery voltage
ALKIA1302ZZ
Power window and door lock/unlock
switch RH connector Te r m i n a l
Front power window
motor RH connector
Terminal Continuity
D105 (A) 8
D104 (B) 2
Ye s
91
Power window and door
lock/unlock switch RH con- nector Terminal
Ground Continuity
D105 (A) 8
No
9
ALKIA1020ZZ
Revision: March 2010 2008 QX56

POWER WINDOW MOTORPWC-21
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
OK >> GO TO 3
NG >> Repair or replace harness.
3. CHECK REAR POWER WINDOW MOTOR LH
Check rear power window motor LH.
Refer to PWC-21, "
REAR LH : Component Inspection".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident".
NO >> Replace rear power window motor LH. Refer to GW-13, "
Removal and Installation".
REAR LH : Component InspectionINFOID:0000000001735672
COMPONENT INSPECTION
1. CHECK REAR POWER WINDOW MOTOR LH
Does motor operate by connecting the battery voltage directly to rear power window motor LH?
Is the inspection result normal?
YES >> Rear power window motor LH is OK.
NO >> Replace rear power window motor LH. Refer to GW-13, "
Removal and Installation".
REAR RH
REAR RH : DescriptionINFOID:0000000001735673
Door glass moves UP/DOWN by receiving the signal from main power window and door lock/unlock switch or
rear power window switch RH.
REAR RH : Component Function CheckINFOID:0000000001735674
1. CHECK REAR POWER WINDOW MOTOR RH CIRCUIT
Does rear power window motor RH operate with operat ing main power window and door lock/unlock switch or
rear power window switch RH?
Is the inspection result normal?
YES >> Rear power window motor RH is OK.
NO >> Refer to PWC-21, "
REAR RH : Diagnosis Procedure".
REAR RH : Diagnosis ProcedureINFOID:0000000001735675
Rear Power Window Mo tor RH Circuit Check
1. CHECK REAR POWER WINDOW SWITCH RH OUTPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between rear power window switch RH connector D303 terminals 4, 5 and ground.
Te r m i n a l Motor condition
(+) (–)
21 D OW N
12 U P
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
D303 4
Ground Closing
0
Opening Battery voltage
5 Closing Battery voltage
Opening 0
LIIA2365E
Revision: March 2010 2008 QX56

PWC-22
< COMPONENT DIAGNOSIS >
POWER WINDOW MOTOR
OK or NG
OK >> Replace rear power window switch RH. Refer to PWC-117, "Removal and Installation".
NG >> GO TO 2
2. CHECK REAR POWER WINDOW SWITCH RH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power window switch RH and rear power win- dow control unit RH.
3. Check continuity between rear power window switch RH con- nector D303 terminals 4, 5 and rear power window control unit
RH connector D309 terminals 9, 10.
OK or NG
OK >> GO TO 3
NG >> Repair or replace harness.
3. CHECK REAR POWER WINDOW MOTOR RH
Check rear power window motor RH.
Refer to PWC-22, "
REAR RH : Component Inspection".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident".
NO >> Replace rear power window motor RH. Refer to GW-13, "
Removal and Installation".
REAR RH : Component InspectionINFOID:0000000001735676
COMPONENT INSPECTION
1. CHECK REAR POWER WINDOW MOTOR RH
Does motor operate by connecting the battery voltage directly to rear power window motor RH?
Is the inspection result normal?
YES >> Rear power window motor RH is OK.
NO >> Replace rear power window motor RH. Refer to GW-13, "
Removal and Installation".
4 - 9
: Continuity should exist.
5 - 10 : Continuity should exist.
LIIA1379E
Te r m i n a l
Motor condition
(+) (–)
21 D OW N
12 U P
Revision: March 2010 2008 QX56

ENCODERPWC-25
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
1. Disconnect main power window and door lock/unlock switch.
2. Check continuity between main power window and door lock/ unlock switch connector and front power window motor LH con-
nector.
Is the inspection result normal?
YES >> Replace main power window and door lock/unlock switch. Refer to PWC-115, "
Removal and Installation".
NO >> Repair or replace harness.
6. CHECK HARNESS CONTINUITY 3
1. Disconnect main power window and door lock/unlock switch.
2. Check continuity between main power window and door lock/ unlock switch connector (A) and front power window motor LH
connector (B).
3. Check continuity between main power window and door lock/ unlock switch connector (A) and ground.
Is the inspection result normal?
YES >> Replace front power wi ndow motor LH. Refer to GW-9, "Removal and Installation".
NO >> Repair or replace harness.
PASSENGER SIDE
PASSENGER SIDE : DescriptionINFOID:0000000001735680
Detects condition of the front power window motor RH operation and transmits to power window and door
lock/unlock switch RH as pulse signal.
PASSENGER SIDE : Comp onent Function CheckINFOID:0000000001735681
1.CHECK ENCODER OPERATION
Does front door glass RH perform AUTO open/close operation normally when operating power window and
door lock/unlock switch RH?
Is the inspection result normal?
YES >> Encoder operation is OK.
NO >> Refer to PWC-25, "
PASSENGER SIDE : Diagnosis Procedure".
PASSENGER SIDE : Dia gnosis ProcedureINFOID:0000000001735682
1. CHECK ENCODER SIGNAL
Main power window and
door lock/unlock switch
connector Te r m i n a l
Front power win-
dow motor LH con-
nector Terminal Continuity
D7 2 D9 6 Yes
LIIA0924E
Main power window
and door lock/unlock switch connector Te r m i n a l
Front power window
motor LH connector Terminal Continuity
D7 (A) 9
D9 (B) 5
Ye s
13 3
Main power window and door lock/unlock switch connector Te r m i n a l
GroundContinuity
D7 (A) 9
No
13
ALKIA1022ZZ
Revision: March 2010 2008 QX56

PWC-28
< COMPONENT DIAGNOSIS >
ENCODER
Is the inspection result normal?
YES >> Replace front power window motor RH. Refer to GW-9, "Removal and Installation".
NO >> Repair or replace harness.
REAR LH
REAR LH : DescriptionINFOID:0000000001806212
Detects condition of the front power window motor LH operation and transmits to main power window and door
lock/unlock switch as pulse signal.
REAR LH : Componen t Function CheckINFOID:0000000001806213
1. CHECK ENCODER OPERATION
Does front door glass LH perform AUTO open/close operation normally when operating main power window
and door lock/unlock switch?
Is the inspection result normal?
YES >> Encoder operation is OK.
NO >> Refer to PWC-31, "
REAR RH : Diagnosis Procedure"
REAR LH : Diagnosis ProcedureINFOID:0000000001806214
Encoder Circuit Check
1. CHECK ENCODER SIGNAL
1. Turn ignition switch ON.
2. Check the signal between rear power window control unit LH connector D209 terminal 4 and ground with oscilloscope.
OK or NG
OK >> GO TO 2
NG >> Replace rear power window control unit LH.
2. CHECK HARNESS CONTINUITY
Power window and door
lock/unlock switch RH con-
nector Te r m i n a l
GroundContinuity
D105 (A) 12
No
15
Connec-
tor Te r m i n a l s
Condition Signal
(+) (-)
D209 4 Ground Opening
LIIA2368E
OCC3383D
Revision: March 2010 2008 QX56