2009 INFINITI QX56 key

PWC-36
< COMPONENT DIAGNOSIS >
DOOR KEY CYLINDER SWITCH
DOOR KEY CYLINDER SWITCH
DescriptionINFOID:0000000003776008
Main power window and door lock/unlock switch detects condition of the door key cylinder and transmits to
BCM as the LOCK or UNLOCK signals.
Component Function CheckINFOID:0000000003776009
1. CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
Check (“KEY CYL LK-SW”, “KEY CYL UN-SW”) in “DAT A MONITOR” mode for “POWER DOOR LOCK SYS-
TEM” with CONSULT-III. Refer to DLK-56, "CONSULT-III Function (INTELLIGENT KEY)"
.
Is the inspection result normal?
YES >> Key cylinder switch is OK.
NO >> Refer to PWC-36, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000003776010
1. CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between main power window and door lock/ unlock switch connector and ground.
Is the measurement value within the specification?
YES >> Replace main power window and door lock/unlock switch.
NO >> GO TO 2
2. CHECK DOOR KEY CYLINDER SIGNAL CIRCUIT
Monitor item Condition
KEY CYL LK-SW Lock : ON
Neutral / Unlock : OFF
KEY CYL UN-SW Unlock : ON
Neutral / Lock : OFF
Te r m i n a l s
Key positionVoltage (V)
(Approx.)
(+)
(–)
Main power window
and door lock/unlock switch connector Te r m i n a l
D7 4
Ground Lock 0
Neutral/Unlock 5
6 Unlock 0
Neutral/Lock 5
ALKIA0309ZZ
Revision: December 20092009 QX56

DOOR KEY CYLINDER SWITCHPWC-37
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch and front door lock assembly LH (key cylinder switch).
3. Check continuity between main power window and door lock/
unlock switch connector and front door lock assembly LH (key
cylinder switch) connector.
4. Check continuity between main power window and door lock/unlock switch connector and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT
Check continuity between front door lock assembly LH (key cylinder
switch) connector and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4. CHECK DOOR KEY CYLINDER SWITCH
Check door key cylinder switch.
Refer to PWC-37, "Component Inspection"
.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident".
NO >> Replace front door lock assembly LH (door key cylinder switch).
Component InspectionINFOID:0000000003776011
COMPONENT INSPECTION
1. CHECK DOOR KEY CYLINDER SWITCH
Main power window
and door lock/unlock switch connector Te r m i n a lFront door lock as-
sembly LH (key cylin-
der switch) connector Terminal Continuity
D7 (A) 4
D14 (B) 1
Ye s
66
Main power window and door lock/unlock switch connector Te r m i n a l
Ground Continuity
D7 (A) 4
No
6
ALKIA1025ZZ
Front door lock assembly LH (key
cylinder switch) connector Te r m i n a l
GroundContinuity
D14 5 Yes
LIIA1572E
Revision: December 20092009 QX56

PWC-38
< COMPONENT DIAGNOSIS >
DOOR KEY CYLINDER SWITCH
Check front door lock assembly LH (key cylinder switch).
Is the inspection result normal?
YES >> Key cylinder switch is OK.
NO >> Replace front door lock assembly LH (key cylinder switch).
Te r m i n a lKey position Continuity
Front door lock assembly LH
(key cylinder switch) connector
6 5 Unlock Yes
Neutral/Lock No
1 Lock Yes
Neutral/Unlock No
LIIA1573E
Revision: December 20092009 QX56

POWER WINDOW SERIAL LINKPWC-39
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
POWER WINDOW SERIAL LINK
POWER WINDOW MAIN SWITCH
POWER WINDOW MAIN SWITCH : DescriptionINFOID:0000000003776012
Main power window and door lock/unlock switch, pow er window and door lock/unlock switch RH and BCM
transmit and receive the signal by power window serial link.
The signal mentioned below is transmitted from BCM to main power window and door lock/unlock switch and
power window and door lock/unlock switch RH
 Keyless power window down signal
The signal mentioned below is transmitted from main power window and door lock/unlock switch to power win-
dow and door lock/unlock switch RH
 Front door window RH operation signal
 Power window control by key cylinder switch signal
 Power window lock switch signal
 Retained power operation signal
POWER WINDOW MAIN SWITCH : Component Function CheckINFOID:0000000003776013
1. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH OUTPUT SIGNAL
Check (“CDL LOCK SW ”, “CDL UNLOCK SW”) in “D ATA MONITOR” mode for “POWER DOOR LOCK SYS-
TEM” with CONSULT-III. Refer to BCS-17, "DOOR LOCK : CONSULT-II I Function (BCM - DOOR LOCK)"
.
Is the inspection result normal?
YES >> Power window serial link is OK.
NO >> Refer to PWC-39, "POWER WINDOW MAIN SWITCH : Diagnosis Procedure"
.
POWER WINDOW MAIN SWITCH : Diagnosis ProcedureINFOID:0000000003776014
Power Window Serial Link Check
1. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH OUTPUT SIGNAL
1. Remove Intelligent Key or ignition key, and close front door LH and RH.
2. Check signal between BCM connector and ground with oscillo- scope when door lock and unlock switch (LH and RH) is turned
to “LOCK” or “UNLOCK”.
3. Check that signals which are shown in the figure below can be detected during 10 second just after door lock and unlock switch
(LH and RH) is turned to “LOCK” or “UNLOCK”.
Monitor item Condition
CDL LOCK SW LOCK : ON
UNLOCK : OFF
CDL UNLOCK SW LOCK : OFF
UNLOCK : ON
LIIA0391E
Revision: December 20092009 QX56

PWC-40
< COMPONENT DIAGNOSIS >
POWER WINDOW SERIAL LINK
Is the inspection result normal?
YES >> Power window serial link is OK.
NO >> GO TO 2
2. CHECK POWER WINDOW SERIAL LINK CIRCUIT
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 connector.
4. Check continuity between BCM 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.
FRONT POWER WINDOW SWITCH
FRONT POWER WINDOW SWITCH : DescriptionINFOID:0000000003776015
Main power window and door lock/unlock switch, power window and door lock/unlock switch RH and BCM
transmit and receive the signal by power window serial link.
The signal mentioned below is transmitted from BCM to main power window and door lock/unlock switch and
power window and door lock/unlock switch RH
 Keyless power window down signal
The signal mentioned below is transmitted from main power window and door lock/unlock switch to power win-
dow and door lock/unlock switch RH
 Front door window RH operation signal
 Power window control by key cylinder switch signal
 Retained power operation signal
 Power window lock switch signal
FRONT POWER WINDOW SWITCH : Component Function CheckINFOID:0000000003776016
1. CHECK POWER WINDOW AND DOOR LO CK/UNLOCK SWITCH RH OUTPUT SIGNAL
Te r m i n a l
Signal
(Reference value)
(+)
(–)
BCM connector Terminal
M18 22 Ground
PIIA1297E
BCM connector Terminal Main power window and door
lock/unlock switch connector Terminal Continuity
M18 (A) 22 D7 (B) 14 Yes
ALKIA1026ZZ
BCM connector Terminal GroundContinuity
M18 (A) 22 No
Revision: December 20092009 QX56

POWER WINDOW SERIAL LINKPWC-41
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
Check (“CDL LOCK SW ”, “CDL UNLOCK SW”) in “D ATA MONITOR” mode for “POWER DOOR LOCK SYS-
TEM” with CONSULT-III. Refer to BCS-17, "DOOR LOCK : CONSULT-II I Function (BCM - DOOR LOCK)"
.
Is the inspection result normal?
YES >> Power window serial link is OK.
NO >> Refer to PWC-41, "FRONT POWER WINDO W SWITCH : Diagnosis Procedure"
.
FRONT POWER WINDOW SWITCH : Diagnosis ProcedureINFOID:0000000003776017
Power Window Serial Link Check
1. CHECK POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH RH
1. Remove Intelligent Key or ignition key, and close the front door LH and RH.
2. Check signal between BCM connector and ground with oscillo- scope when door lock and unlock switch (LH and RH) is turned
to “LOCK” or “UNLOCK”.
3. Check that signals which are shown in the figure below can be detected during 10 second just after door lock and unlock switch
(LH and RH) is turned to “LOCK” or “UNLOCK”.
Is the inspection result normal?
YES >> Power window serial link is OK.
NO >> GO TO 2
2. CHECK POWER WINDOW SERIAL LINK CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check continuity between BCM connector and power window and door lock/unlock switch RH connector.
4. Check continuity between BCM connector and ground.
Monitor item Condition
CDL LOCK SW LOCK : ON
UNLOCK : OFF
CDL UNLOCK SW LOCK : OFF
UNLOCK : ON
Te r m i n a l Signal
(Reference value)
(+)
(–)
BCM connector Terminal
M18 2 Ground
LIIA0391E
PIIA1297E
BCM connector Terminal Power window and door
lock/unlock switch RH con-
nector Terminal Continuity
M18 (A) 22 D105 (B) 16 Yes
ALKIA1027ZZ
Revision: December 20092009 QX56

BCM (BODY CONTROL MODULE)PWC-55
< ECU DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
HEADLAMP SW1 Headlamp switch OFF OFF
Headlamp switch 1st ON
HEADLAMP SW2 Headlamp switch OFF OFF
Headlamp switch 1st ON
HI BEAM SW High beam switch OFF OFF
High beam switch HI ON
H/L WASH SW NOTE:
The item is indicated, but not monitored OFF
IGN ON SW Ignition switch OFF or ACC OFF
Ignition switch ON ON
IGN SW CAN Ignition switch OFF or ACC OFF
Ignition switch ON ON
INT VOLUME Wiper intermittent dial is in a dial position 1 - 7 1 - 7
I-KEY LOCK LOCK button of Intelligent Key is not pressed OFF
LOCK button of Intelligent Key is pressed ON
I-KEY UNLOCK UNLOCK button of Intelligent Key is not pressed OFF
UNLOCK button of Intelligent Key is pressed ON
KEY ON SW Mechanical key is removed from key cylinder OFF
Mechanical key is inserted to key cylinder ON
OIL PRESS SW  Ignition switch OFF or ACC
 Engine running
OFF
Ignition switch ON ON
PASSING SW Other than lighting switch PASS OFF
Lighting switch PASS ON
REAR DEF SW Rear window defogger switch OFF OFF
Rear window defogger switch ON ON
RKE LOCK AND UN-
LOCK NOTE:
The item is indicated, but not monitored OFF
ON
RR WASHER SW Rear washer switch OFF OFF
Rear washer switch ON ON
RR WIPER INT Rear wiper switch OFF OFF
Rear wiper switch INT ON
RR WIPER ON Rear wiper switch OFF OFF
Rear wiper switch ON ON
RR WIPER STOP Rear wiper stop position OFF
Other than rear wiper stop position ON
TAIL LAMP SW Lighting switch OFF OFF
Lighting switch 1ST ON
TRNK OPNR SW When back door opener switch is not pressed OFF
When back door opener switch is pressed ON
TURN SIGNAL L Turn signal switch OFF OFF
Turn signal switch LH ON
TURN SIGNAL R Turn signal switch OFF OFF
Turn signal switch RH ON
VEHICLE SPEED While driving Equiv alent to speedometer reading
Monitor Item Condition Value/Status
Revision: December 20092009 QX56

BCM (BODY CONTROL MODULE)PWC-57
< ECU DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
Te r m i n a l Wire
color Signal name Signal
input/
output Measuring condition
Reference value or waveform
(Approx.)
Ignition
switch Operation or condition
1BR/W Ignition keyhole illumi-
nation Output OFFDoor is locked (SW OFF) Battery voltage
Door is unlocked (SW ON) 0V
2SB Combination switch
input 5 Input ON
Lighting, turn, wiper OFF
Wiper dial position 4
3G/Y Combination switch
input 4 Input ONLighting, turn, wiper OFF
Wiper dial position 4
4Y Combination switch
input 3 Input ON
Lighting, turn, wiper OFF
Wiper dial position 4
5G/B Combination switch
input 2
Input ONLighting, turn, wiper OFF
Wiper dial position 4
6V Combination switch
input 1
9GR/R Rear window defogger
switch
Input ONRear window defogger switch
ON
0V
Rear window defogger switch
OFF 5V
10 G Hazard lamp flash Input OFF ON (opening or closing) 0V
OFF (other than above) Battery voltage
11 O Ignition switch (ACC
or ON)
InputACC or
ON Ignition switch ACC or ON Battery voltage
12 R/L Front door switch RH Input OFF ON (open) 0V
OFF (closed) Battery voltage
13 GR Rear door switch RH Input OFF ON (open) 0V
OFF (closed) Battery voltage
15 L/W Tire pressure warning
check connector
Input OFF — 5V
18 P Remote keyless entry
receiver and optical
sensor (ground)
Output OFF — 0V
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
Revision: December 20092009 QX56