INFINITI QX56 2007 Factory Service Manual

BL-30
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
3. Check continuity between BCM connector M18 terminal 22 and
power window and door lock/unlock switch RH connector D105
terminal 16.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4.CHECK POWER WINDOW BUS CIRCUIT FOR SHORT
Check continuity between BCM connector M18 terminal 22 and
ground.
OK or NG
OK >> Replace main power window and door lock/unlock switch or power window and door lock/unlock
switch RH
NG >> Repair or replace harness.
Glass Hatch Switch Circuit InspectionINFOID:0000000003532907
NOTE:
Repair any front door lock actuator RH malfunction before proceeding with this diagnosis.
1.CHECK GLASS HATCH SWITCH
1. Turn ignition switch OFF.
2. Insure front door lock actuator RH is in the unlock position.
3. Check continuity between glass hatch switch terminal 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2.CHECK HARNESS CONTINUITY
1. Disconnect glass hatch switch.
2. Disconnect BCM.22 - 16 : Continuity should exist.
LIIA1271E
22 - Ground : Continuity should not exist.
LIIA2359E
Connec-
torTe r m i n a l s
Condition Continuity
(+) (–)
D710 2 GroundWith the glass hatch switch
pressedYe s
With the glass hatch switch
releasedNo
LIIA2399E

POWER DOOR LOCK SYSTEM
BL-31
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
3. Check continuity between BCM connector M18 (A) terminal 30
and glass hatch switch connector D710 (B) terminal 2.
4. Check continuity between BCM connector M18 (A) terminal 30
and ground.
OK or NG
OK >> Glass hatch switch circuit is OK.
NG >> Repair or replace harness.
3.CHECK GLASS HATCH SWITCH
1. Disconnect glass hatch switch.
2. Check continuity between glass hatch switch harness connector
D710 terminal 1 and ground.
OK or NG
OK >> Replace glass hatch switch.
NG >> GO TO 4.
4.CHECK HARNESS CONTINUITY
1. Disconnect front door lock actuator RH.
2. Check continuity between glass hatch switch connector D710
(A) terminal 1 and front door lock actuator RH connector D114
(B) terminal 4
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness.
5.CHECK FRONT DOOR LOCK ACTUATOR RH GROUND CIRCUIT
Check continuity between front door lock actuator RH connector
D114 terminal 5 and ground
OK or NG
OK >> Replace front door lock actuator RH. Refer to BL-110.
NG >> Repair or replace harness.30 - 2 : Continuity should exist.
30 - Ground : Continuity should not exist.
LIIA2400E
1 - Ground : Continuity should exist.
LIIA2401E
1 - 4 : Continuity should exist.
LIIA2402E
5 - Ground : Continuity should exist.
LIIA2403E

BL-32
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
Front Door Lock Assembly LH (Actuator) Check
INFOID:0000000003532908
1.CHECK DOOR LOCK ACTUATOR SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between BCM connector M20 terminals 59, 65
and ground.
OK or NG
OK >> GO TO 2.
NG >> Replace BCM. Refer to BCS-24, "
BCM".
2.CHECK DOOR LOCK ACTUATOR HARNESS
1. Disconnect BCM and front door lock assembly LH (actuator).
2. Check continuity between BCM connector M20 terminals 59, 65
and front door lock assembly LH (actuator) connector D14 termi-
nals 2, 3.
3. Check continuity between BCM connector M20 terminals 59, 65
and ground.
OK or NG
OK >> Replace front door lock assembly LH (actuator). Refer to BL-110.
NG >> Repair or replace harness.
Front Door Lock Actuator RH CheckINFOID:0000000003532909
1.CHECK FRONT DOOR LOCK ACTUATOR RH SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between BCM connector M20 terminals 65, 66
and ground.
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M2059
GroundDriver door lock/unlock
switch is turned to UN-
LOCK0 → Battery voltage
65Driver door lock/unlock
switch is turned to LOCK0 → Battery voltage
LIIA1046E
Connector Terminals Connector Terminals Continuity
M2059
D142Yes
65 3 Yes
Connector Terminals Continuity
M2059
GroundNo
65 No
LIIA1574E
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M2065
GroundDoor lock/unlock switch is
turned to LOCK0 → Battery voltage
for 300 ms
66Door lock/unlock switch is
turned to UNLOCK0 → Battery voltage
for 300 ms
LIIA1048E

POWER DOOR LOCK SYSTEM
BL-33
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
OK or NG
OK >> GO TO 2.
NG >> Replace BCM. Refer to BCS-24, "
BCM".
2.CHECK FRONT DOOR LOCK ACTUATOR RH HARNESS
1. Disconnect BCM and front door lock actuator RH.
2. Check continuity between BCM connector M20 terminals 65, 66
and front door lock actuator RH D114 terminals 2, 3.
3. Check continuity between BCM connector M20 terminals 65, 66
and ground.
OK or NG
OK >> Replace front door lock actuator RH. Refer to BL-110.
NG >> Repair or replace harness.
Rear Door Lock Actuator RH/LH CheckINFOID:0000000003532910
1.CHECK DOOR LOCK ACTUATOR SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between BCM connector M20 terminals 65, 66
and ground.
OK or NG
OK >> GO TO 2.
NG >> Replace BCM. Refer to BCS-24, "
BCM".
2.CHECK REAR DOOR LOCK ACTUATOR LH OR RH HARNESS
1. Disconnect BCM and each door lock actuator.
Terminals Continuity
65 3 Yes
66 2 Yes
Terminals Continuity
65
GroundNo
66 No
LIIA1479E
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M2065
GroundDoor lock/unlock switch
is turned to LOCK0 → Battery voltage
for 300 ms
66Door lock/unlock switch
is turned to UNLOCK0 → Battery voltage
for 300 ms
LIIA1048E

BL-34
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
2. Check continuity between BCM connector M20 terminals 65, 66
and rear door lock actuator RH/LH connectors terminals 2, 3.
3. Check continuity between BCM connector M20 terminals 65, 66
and ground.
OK or NG
OK >> Replace door lock actuator. Refer to BL-113.
NG >> Repair or replace harness.
Glass Hatch Lock Actuator CheckINFOID:0000000003532911
1.CHECK GLASS HATCH LOCK ACTUATOR SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between BCM connector M19 terminal 53 and
ground.
OK or NG
OK >> GO TO 2.
NG >> Replace BCM. Refer to BCS-24, "
BCM".
2.CHECK GLASS HATCH LOCK ACTUATOR HARNESS
1. Disconnect BCM and glass hatch lock actuator.
2. Check continuity between BCM connector M19 terminal 53 and
glass hatch lock actuator connector D711 terminal 3.
3. Check continuity between BCM connector M19 terminals 53 and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK GLASS HATCH LOCK ACTUATOR GROUND CIRCUIT
1. Disconnect glass hatch lock actuator.
Terminals Continuity
65 3 Yes
66 2 Yes
Terminals Continuity
65
GroundNo
66 No
LIIA1480E
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M19 53 GroundGlass hatch switch is
turned to depressed0 → Battery voltage
for 300 ms
LIIA1938E
Terminals Continuity
53 3 Yes
Terminals Continuity
53 Ground No
LIIA1939E

POWER DOOR LOCK SYSTEM
BL-35
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
2. Check continuity between glass hatch lock actuator connector
D711 terminal 1 and ground.
OK or NG
OK >> Replace glass hatch lock actuator. Refer to BL-114.
NG >> Repair or replace harness.
Front Door Lock Assembly LH (Key Cylinder Switch) CheckINFOID:0000000003532912
1.CHECK DOOR KEY CYLINDER SWITCH LH
With CONSULT-II
Check front door lock assembly LH (key cylinder switch) ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in
DATA MONITOR mode with CONSULT–II. Refer to BL-24, "
CONSULT-II Function (BCM)".
• When key inserted in front key cylinder is turned to LOCK:
• When key inserted in front key cylinder is turned to UNLOCK:
Without CONSULT-II
Check voltage between main power window and door lock/unlock
switch connector D7 terminals 4, 6 and ground.
OK or NG
OK >> Front door lock assembly LH (key cylinder switch) signal is OK.
NG >> GO TO 2.
2.CHECK DOOR KEY CYLINDER SWITCH LH GROUND HARNESS
Terminals Continuity
1 Ground Yes
LIIA1940E
KEY CYL LK-SW : ON
KEY CYL UN-SW : ON
LIIA0188E
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
D74
GroundNeutral/Unlock 5
Lock 0
6Neutral/Lock 5
Unlock 0
LIIA0566E

BL-36
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
Check continuity between front door lock assembly LH (key cylinder
switch) connector (A) D14 terminal 5 and body ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK DOOR KEY CYLINDER SWITCH LH
Check continuity between front door lock assembly LH (key cylinder
switch) terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace front door lock assembly LH (key cylinder switch). Refer to BL-110
.
4.CHECK DOOR KEY CYLINDER HARNESS
Check continuity between main power window and door lock/unlock
switch connector (A) D7 terminals 4, 6 and front door lock assembly
LH (key cylinder switch) connector (B) D14 terminals 1, 6 and body
ground.
OK or NG
OK >> Replace main power window and door lock/unlock switch.
NG >> Repair or replace harness.
Connector Terminals Continuity
D14 5 – Ground Yes
WIIA1067E
Terminals Condition Continuity
1 – 5 Key is turned to UNLOCK or neutral. No
Key is turned to LOCK. Yes
5 – 6Key is turned to LOCK or neutral. No
Key is turned to UNLOCK. Yes
LIIA1573E
Connector Terminals ConnectorTe r m i n a l s
(wire color)Continuity
A: Main
power win-
dow and
door lock/
unlock
switch4B: Front
door lock
assembly
LH (key
cylinder
switch)1Yes
66Yes
4, 6 Ground No
WIIA1068E

REMOTE KEYLESS ENTRY SYSTEM
BL-37
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
REMOTE KEYLESS ENTRY SYSTEM
Component Parts and Harness Connector LocationINFOID:0000000003532913
System DescriptionINFOID:0000000003532914
INPUTS
Power is supplied at all times
WIIA0588E

BL-38
< SERVICE INFORMATION >
REMOTE KEYLESS ENTRY SYSTEM
• to BCM terminal 70
• through 50A fusible link (letter f , located in the fuse and fusible link box).
• to BCM terminal 57
• through 15A fuse [No. 22, located in the fuse block (J/B)].
When the key is inserted in the key switch and key lock solenoid, power is supplied
• to BCM terminal 37
• through key switch and key lock solenoid terminals 3 and 4
• through 10A fuse [No. 19, located in the fuse block (J/B)].
When the ignition switch is ACC or ON, power is supplied
• to BCM terminal 11
• through 10A fuse [No. 4, located in the fuse block (J/B)].
When the ignition switch is ON or START, power is supplied
• to BCM terminal 38
• through 10A fuse (No. 59, located in the fuse and relay box).
When the front door switch LH is ON (door is OPEN), ground is supplied
• to BCM terminal 47
• through front door switch LH terminal 2
• through front door switch LH case ground.
When the front door switch RH is ON (door is OPEN), ground is supplied
• to BCM terminal 12
• through front door switch RH terminal 2
• through front door switch RH case ground.
When the rear door switch LH is ON (door is OPEN), ground is supplied
• to BCM terminal 48
• through rear door switch LH terminal 2
• through rear door switch LH case ground.
When the rear door switch RH is ON (door is OPEN), ground is supplied
• to BCM terminal 13
• through rear door switch RH terminal 2
• through rear door switch RH case ground.
When the back door latch (door ajar switch) is ON (door is OPEN), ground is supplied
• to BCM terminal 43
• through back door latch (door ajar switch) terminal 7,
• through back door latch (door ajar switch) terminal 8,
• through body grounds B7 and B19.
Keyfob signal is input into the BCM from the remote keyless entry receiver.
The remote keyless entry system controls operation of the
• power door lock
• back door opener
• interior lamp and step lamps
• panic alarm
• hazard and horn reminder
• keyless power window down (open)
• auto door lock operation
OPERATING PROCEDURE
• When the keyfob is operated, the signal from the keyfob is sent and the remote keyless entry receiver
receives the signal and sends it to the BCM. The BCM only locks/unlocks the doors if the ID number
matches. (Remote control entry functions)
• Using the keyfob, the transmitter sends radio waves to the remote keyless entry receiver, which then sends
the received waves to the BCM. Only if the ID number matches does the BCM lock/unlock the doors.
(Remote control door function)
• Unless the key is inserted into the ignition key cylinder or one of the doors is opened within 1 minute after the
UNLOCK switch on the keyfob is pressed, all the doors are automatically locked. (Auto lock function)
• When a door is locked or unlocked, the vehicle turn signal lamps flash and the horn sounds to verify opera-
tion. (Active check function)
• When the key is in the ignition key cylinder (when the key switch is ON) and one of the doors is open, the
door lock function does not work even when the door lock is operated with the keyfob.
• Keyfob ID set up is available.
• If a keyfob is lost, a new keyfob can be set up. A maximum of 5 IDs can be set up simultaneously.
Remote Control Entry Functions

REMOTE KEYLESS ENTRY SYSTEM
BL-39
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
Operation Description
• When a button on the keyfob is operated, the signal is sent from the keyfob and received by the remote key-
less entry receiver.
• The received signal is sent to the BCM and compared with the registered ID number.
• If the ID number matches, the BCM sends the lock/unlock signal to each door lock actuator.
• When the door lock actuators receive this signal, each operates to lock/unlock its door.
• BCM locks all doors with input of LOCK signal from keyfob.
• When an UNLOCK signal is sent from keyfob once, driver's door will be unlocked.
• Then, if an UNLOCK signal is sent from keyfob again within 5 seconds, all other doors will be unlocked.
Remote control entry operation conditions
Auto Lock Function
Operation Description
• Unless the key is inserted into the ignition key cylinder, one of the doors is opened, or the keyfob is operated
within 1 minute after a door lock is unlocked by keyfob operation, all the doors are automatically locked.
The 1 minute timer count is executed by the BCM and after 1 minute, the BCM sends the lock signal to all
doors.
Lock operations are the same as for the remote control entry function.
Remote Control Automatic Back Door Function
Switching from all closed to all open
• When a button on the keyfob is operated, the signal is sent from the keyfob and received by the remote key-
less entry receiver.
• The received signal is sent to the BCM and compared with the registered ID number.
• If the ID number matches, the BCM uses power window serial link communication to send the back door
open signal to the back door control unit
• When the back door control unit receives the back door open signal for 0.5 seconds, if the remote control
automatic back door operation enable conditions are met, the warning chime is sounded and the back door
unlock signal is sent to the back door latch using communication.
• When the back door latch receives the back door unlock signal, it operates the release actuator and
releases to back door latch.
• The back door control unit operates the back door motor to open the back door. (At this time, speed control,
input reverse, and overload reverse control are executed.)
• When the back door is opened to the fully open position, the full-open position is detected with the rotation
sensor, the back door motor is stopped.
• The door held by the back door stays at the full open position.
Full open → full closed operation
• When a button of the keyfob is operated, the signal is sent from the keyfob and received by the remote key-
less entry receiver.
• The received signal is sent to the BCM and compared with the registered ID number.
• If the ID number matches, the BCM uses power window serial link communication to send the back door
close request signal to the back door control unit.
• When the back door control unit receives the back door close request signal for 0.5 seconds, if the remote
control automatic back door operation enable conditions are met, the warning chime is sounded and the
back door motor begins closing the back door.
• The back door control unit operates the magnetic clutch and the back door motor to close the back door. (At
this time, the back door control unit executes speed control, input reverse, and overload reverse control.)
• When the back door comes to the half-latch state, the back door latch detects the half-latch state through
half-latch switch operation. The back door latch latches the back door.
For the automatic back door system operation enable conditions, refer to BL-80
.
Active Check Function
Operation Description
When a door is locked or unlocked by keyfob operation, the vehicle turn signals flash and the horn sounds to
verify operation.
• When a button on the keyfob is operated, the signal is sent from the remote controller and received by the
keyless remote entry receiver.
Keyfob operation Operation condition
Door lock operation (locking)• With key removed (key switch: OFF)
• Closing all doors (door switch: OFF)
Door lock operation (unlocking) With key removed (key switch: OFF)