2007 INFINITI QX56 ignition

BCM (BODY CONTROL MODULE)
BCS-21
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
BCS
N
O
P
WRITE CONFIGURATION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With ignition switch OFF, connect CONSULT-II and CONSULT-II
CONVERTER to data link connector and turn ignition switch ON.
2. Touch “START (NISSAN BASED VHCL)”.
3. Touch “BCM” on “SELECT SYSTEM” screen.
If "BCM" is not indicated, go to GI-38, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
4. Touch “BCM” on “SELECT TEST ITEM” screen.
PAIA0070E
BCIA0029E
BCIA0030E
LKIA0183E

BCS-24
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
14. Touch "OK" on "WRITE CONFIGURATION" screen.
WRITE CONFIGURATION is completed.
BCMINFOID:0000000003533605
REMOVAL AND INSTALLATION
NOTE:
If possible, before removing BCM, retrieve current BCM configuration to use for reference when configuring
brand-new BCM after installation. Refer to BCS-18, "
Configuration".
Removal
1. Disconnect battery negative terminal.
2. Remove instrument lower panel LH. Refer to IP-10
.
3. Remove knee protector. IP-10
.
4. Disconnect BCM electrical connectors.
5. Remove BCM screws and remove BCM.
Installation
Installation is in the reverse order of removal.
NOTE:
• When replacing BCM, it must be configured. Refer to BCS-18, "
Configuration".
• When replacing BCM, perform initialization of NATS system and registration of all NATS ignition key IDs.
Refer to BL-116
.
• When replacing BCM, perform ID registration procedure of low tire pressure warning system. Refer to WT-
12, "ID Registration Procedure".
LKIA0400E
LEIA0068E

BL-16
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
• to BCM terminal 70
• through 15A fuse [No. 22, located in the fuse block (J/B)]
• to BCM terminal 57
• through 10A fuse [No. 19, located in the fuse block (J/B)]
• to key switch and key lock solenoid terminal 3.
With ignition key inserted, power is supplied
• through key switch and key lock solenoid terminal 4
• to BCM terminal 37.
Ground is supplied to terminal 67 of BCM through body grounds M57, M61 and M79.
When the door is locked or unlocked with main power window and door lock/unlock switch, ground is supplied
• to CPU of main power window and door lock/unlock switch
• through main power window and door lock/unlock switch terminal 17
• through grounds M57, M61 and M79.
Then main power window and door lock/unlock switch operation signal is supplied
• to BCM terminal 22
• through main power window and door lock/unlock switch terminal 14.
When the door is locked or unlocked with power window and door lock/unlock switch RH, ground is supplied
• to CPU of power window and door lock/unlock switch RH
• through power window and door lock/unlock switch RH terminal 11
• through grounds M57, M61 and M79.
Then power window and door lock/unlock switch RH operation signal is supplied
• to BCM terminal 22
• through power window and door lock/unlock switch RH terminal 16.
When the door is locked with front door lock assembly LH (key cylinder switch), ground is supplied
• to main power window and door lock/unlock switch terminal 4
• through front door lock assembly LH (key cylinder switch) terminals 1 and 5
• through grounds M57, M61 and M79.
Then front door lock assembly LH (key cylinder switch) operation signal is supplied
• to BCM terminal 22
• through main power window and door lock/unlock switch terminal 14.
When the door is unlocked with front door lock assembly LH (key cylinder switch), ground is supplied
• to main power window and door lock/unlock switch terminal 6
• through front door lock assembly LH (key cylinder switch) terminals 6 and 5
• through grounds M57, M61 and M79.
Then front door lock assembly LH (key cylinder switch) operation signal is supplied
• to BCM terminal 22
• through main power window and door lock/unlock switch terminal 14.
BCM is connected to main power window and door lock/unlock switch and power window and door lock/unlock
switch RH through a bus.
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 grounds B7 and B19.
OUTLINE

POWER DOOR LOCK SYSTEM
BL-17
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
NOTE:
The glass hatch switch will be operational only when the front door lock actuator RH is in the unlock position.
Functions available by operating the door lock and unlock switches on driver door and passenger door
• Interlocked with the locking operation of door lock and unlock switch, door lock actuators of all doors and
glass hatch actuator are locked.
• Interlocked with the unlocking operation of door lock and unlock switch, door lock actuators of all doors and
glass hatch actuator are unlocked.
Functions available by operating the front door lock assembly LH (key cylinder switch)
• Interlocked with the locking operation of door key cylinder, door lock actuators of all doors are locked.
• When door key cylinder is unlocked, front door lock assembly LH (actuator) is unlocked.
• When door key cylinder is unlocked for the second time within 5 seconds after the first operation, door lock
actuators on all doors are unlocked.
Key reminder door system
When door lock and unlock switch is operated to lock doors with ignition key in key cylinder and any door
open, all door lock actuators are locked and then unlocked.

BL-24
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
3. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to BL-25,
"Trouble Diagnosis Symptom Chart".
4. Does power door lock system operate normally? OK: GO TO 5, NG: GO TO 3.
5. Inspection End.
CONSULT-II Function (BCM)INFOID:0000000003532901
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT–II START PROCEDURE
Refer to GI-36, "CONSULT-II Start Procedure".
DATA MONITOR
ACTIVE TEST
BCM
diagnostic test itemDiagnostic mode Description
Inspection by partWORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the
BCM for setting the status suitable for required operation, input/output sig-
nals are received from the BCM and received date is displayed.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TESTOperation of electrical loads can be checked by sending drive signal to
them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTRThe result of transmit/receive diagnosis of CAN communication can be
read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
Monitor item "OPERATION" Content
KEY ON SW "ON/OFF" Indicates [ON/OFF] condition of key switch.
CDL LOCK SW "ON/OFF" Indicates [ON/OFF] condition of lock signal from lock/unlock switch LH and RH.
CDL UNLOCK SW "ON/OFF" Indicates [ON/OFF] condition of unlock signal from lock/unlock switch LH and RH.
KEY CYL LK-SW "ON/OFF" Indicates [ON/OFF] condition of lock signal from key cylinder.
KEY CYL UN-SW "ON/OFF" Indicates [ON/OFF] condition of unlock signal from key cylinder.
IGN ON SW "ON/OFF" Indicates [ON/OFF] condition of ignition switch.
DOOR SW–DR "ON/OFF" Indicates [ON/OFF] condition of front door switch LH.
DOOR SW–AS "ON/OFF" Indicates [ON/OFF] condition of front door switch RH.
DOOR SW–RR "ON/OFF" Indicates [ON/OFF] condition of rear door switch RH.
DOOR SW–RL "ON/OFF" Indicates [ON/OFF] condition of rear door switch LH.
BACK DOOR SW "ON/OFF" Indicates [ON/OFF] condition of back door latch (door ajar switch).
KEYLESS LOCK "ON/OFF" Indicates [ON/OFF] condition of lock signal from keyfob.
KEYLESS UNLOCK "ON/OFF" Indicates [ON/OFF] condition of unlock signal from keyfob.
Test item Content
ALL LOCK/UNLOCKThis test is able to check all door lock actuators lock operation. These actuators lock when "ON"
on CONSULT–II screen is touched.
DR UNLOCKThis test is able to check front door lock assembly LH (actuator) unlock operation.These actu-
ators lock when "ON" on CONSULT–II screen is touched.
OTHER UNLOCKThis test is able to check door lock actuators [except front door lock assembly LH (actuator)]
unlock operation.These actuators unlock when "ON" on CONSULT–II screen is touched.

BL-26
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
Without CONSULT-II
Check voltage between BCM connector M18 or M19 terminals 12,
13, 43, 47, 48 and ground.
OK or NG
OK >> Door switch circuit is OK.
NG >> GO TO 2.
2.CHECK DOOR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door switch and BCM.
3. Check continuity between door switch connector (B) B8 (front LH), B108 (front RH), B18 (rear LH), B116
(rear RH) terminal 2 or back door latch connector (C) D503 terminal 7 and BCM connectors (A) M18, M19
terminals 12, 13, 43, 47 and 48.
4. Check continuity between door switch connector (B) B8 (front
LH), B108 (front RH), B18 (rear LH), B116 (rear RH) terminal 2
or back door latch connector (C) D503 terminal 7 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK DOOR SWITCHES
FRONT AND REAR DOORSDOOR SW-RR : OFF
BACK DOOR SW : OFF
Connector ItemTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
M19Back door
latch (door
ajar switch)43
GroundOpen
↓
Closed0
↓
Battery voltage Front door
switch LH47
Rear door
switch LH48
M18Front door
switch RH12
Rear door
switch RH13
LIIA1041E
2 - 12 : Continuity should exist.
2 - 13 : Continuity should exist.
2 - 47 : Continuity should exist.
2 - 48 : Continuity should exist.
7 - 43 : Continuity should exist.
2 - Ground : Continuity should not exist.
7 - Ground : Continuity should not exist.
WIIA0750E

POWER DOOR LOCK SYSTEM
BL-27
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
Check continuity between front or rear door switch terminal 2 and
exposed metal of switch while pressing and releasing switch.
BACK DOOR
Check continuity between back door latch connector (A) D503 termi-
nals 7 and 8 while pressing (closing back door) and releasing (open-
ing back door) switch.
OK or NG
OK >> (Front and rear doors) Switch circuit is OK.
OK >> (Back door) GO TO 4.
NG >> Replace door switch.
4.CHECK BACK DOOR SWITCH GROUND
Check continuity between back door latch connector terminal 8 and
ground.
OK or NG
OK >> Back door switch circuit is OK.
NG >> Repair or replace harness.
Key Switch (Insert) CheckINFOID:0000000003532905
1.CHECK KEY SWITCH INPUT SIGNAL
With CONSULT-II
Check key switch "KEY ON SW" in DATA MONITOR mode with CONSULT–II. Refer to BL-24, "
CONSULT-II
Function (BCM)".
• When key is inserted to ignition key cylinder:
• When key is removed from ignition key cylinder:
Without CONSULT-IIDoor switch is released : Continuity should exist.
Door switch is pushed : Continuity should not exist.
WIIA0644E
When back door is open : Continuity should exist.
When back door is closed : Continuity should not exist.
WIIA0752E
8 - Ground : Continuity should exist.
LIIA0828E
KEY ON SW : ON
KEY ON SW : OFF
LIIA0169E

BL-28
< SERVICE INFORMATION >
POWER DOOR LOCK SYSTEM
Check voltage between BCM connector M18 terminal 37 and
ground.
OK or NG
OK >> Key switch (insert) circuit is OK.
NG >> GO TO 2.
2.CHECK KEY SWITCH (INSERT)
1. Turn ignition switch OFF.
2. Disconnect key switch and key lock solenoid.
3. Check continuity between key switch and key lock solenoid terminals 3, 4.
OK or NG
OK >> Repair or replace harness.
NG >> Replace key switch.
Door Lock/Unlock Switch CheckINFOID:0000000003532906
1.CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL
With CONSULT-II
Check door lock/unlock switch ("CDL LOCK SW", "CDL UNLOCK SW") in DATA MONITOR mode in CON-
SULT–II. Refer to BL-24, "
CONSULT-II Function (BCM)"
• When door lock/unlock switch is turned to LOCK:
• When door lock/unlock switch is turned to UNLOCK:
Without CONSULT-II
1. Remove key from ignition key cylinder.
2. Check the signal between BCM connector M18 terminal 22 and ground with oscilloscope when door lock/
unlock switch is turned to LOCK or UNLOCK.
3. Make sure the signals which are shown in the figure below can be detected during 10 seconds just after
the door lock/unlock switch is turned to LOCK or UNLOCK.
ConnectorTe r m i n a l s
Condition Voltage (V)
(+) (–)
M18 37 GroundKey is inserted. Battery voltage
Key is removed. 0
LIIA0567E
Terminals Condition Continuity
3 – 4Key is inserted. Yes
Key is removed. No
LIIA1044E
CDL LOCK SW :ON
CDL UNLOCK SW :ON
PIIA6538E