2006 INFINITI QX56 battery

BCS-12
BCM (BODY CONTROL MODULE)
Revision: November 20092006 QX56
4. Select item to be diagnosed on “SELECT TEST ITEM” screen.
ITEMS OF EACH PART
NOTE:
CONSULT-II will only display systems the vehicle possesses.
LKIA0183E
System and item CONSULT-II
display Diagnostic test mode (Inspection by part)
WORK
SUPPORT SELF−
DIAG
RESULTS CAN DIAG
SUPPORT MNTR DATA
MONITOR ECU
PA R T
NUMBER ACTIVE
TEST CON-
FIGU-
RATION
BCM BCM××× × ×
Power door lock system DOOR LOCK ×× ×
Rear defogger REAR
DEFOGGER ××
Warning chime BUZZER ××
Room lamp timer INT LAMP ×× ×
Remote keyless entry
system MULTI REMOTE
ENT
××
×
Headlamp HEAD LAMP×× ×
Wiper (front/rear) WIPER ×× ×
Turn signal lamp
Hazard lamp FLASHER
××
Blower fan switch signal
Air conditioner switch
signal AIR
CONDITIONER
×
Combination switch COMB SW ×
IVIS (NATS) IMMU ××
Interior lamp battery
saver BATTERY
SAVER
××
×
Back door TRUNK ××
Theft alarm THEFT ALM×× ×
Retained accessory
power control RETAINED PWR
×× ×
Oil pressure switch SIGNAL BUFFER ××
Air pressure monitor AIR PRESSURE
MONITOR××
× ×
Panic alarm PANIC ALARM ×

BCS-20
BCM (BODY CONTROL MODULE)
Revision: November 20092006 QX56
BCMEKS00D82
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-14, "
Configuration" .
Removal
1. Disconnect battery negative terminal.
2. Remove instrument lower panel LH. Refer to IP-13, "
INSTRUMENT LOWER COVER LH" .
3. Remove knee protector. IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
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-14, "Configuration" .

When replacing BCM, perform initialization of NATS system and registration of all NATS ignition key IDs.
Refer to BL-137, "
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)" .

When replacing BCM, perform ID registration procedure of low tire pressure warning system. Refer to
WT-14, "
ID Registration Procedure" .
LEIA0068E

BL-2Revision: November 20092006 QX56
BCM Power Supply and Ground Circuit Check ...
... 59
Trouble Diagnoses ............................................... ... 60
SYMPTOM CHART ............................................. 60
Key Switch (Insert) Check ...................................... 62
Door Switch Check .............................................. ... 63
Keyfob Battery and Function Check .................... ... 65
Remote Keyless Entry Receiver System Check .. ... 66
ACC Power Check ............................................... ... 68
IPDM E/R Operation Check ................................. ... 68
Check Hazard Function ....................................... ... 70
Check Horn Function ........................................... ... 70
Check Headlamp Function .................................. ... 70
Check Map Lamp Illumination Function .............. ... 70
ID Code Entry Procedure .................................... ... 71
KEYFOB ID SET UP WITH CONSULT-II ......... ... 71
KEYFOB ID SET UP WITHOUT CONSULT-II .. ... 73
Keyfob Battery Replacement ............................... ... 74
VEHICLE SECURITY (THEFT WARNING) SYSTEM ... 75
Component Parts and Harness Connector Location ... 75
System Description .............................................. ... 76
DESCRIPTION ................................................. ... 76
POWER SUPPLY AND GROUND CIRCUIT .... ... 77
INITIAL CONDITION TO ACTIVATE THE SYS-
TEM .................................................................. ... 77
VEHICLE SECURITY SYSTEM ALARM OPER-
ATION ............................................................... ... 77
VEHICLE SECURITY SYSTEM DEACTIVATION ... 78
PANIC ALARM OPERATION ............................ ... 78
CAN Communication System Description ........... ... 78
Schematic ............................................................ ... 79
Wiring Diagram — VEHSEC — ........................... ... 80
.......................................................................... ... 80
.......................................................................... ... 81
.......................................................................... ... 82
.......................................................................... ... 83
.......................................................................... ... 84
Terminals and Reference Value for BCM ............. ... 85
Terminals and Reference Value for IPDM E/R ..... ... 86
CONSULT-II Function (BCM) ............................... ... 86
CONSULT-II INSPECTION PROCEDURE ....... ... 86
CONSULT-II APPLICATION ITEM .................... ... 88
Trouble Diagnosis ................................................ ... 89
WORK FLOW ................................................... ... 89
Preliminary Check ............................................... ... 90
Symptom Chart ....................................................... 91
Door Switch Check .............................................. ... 92
Hood Switch Check ............................................. ... 94
Combination Meter (Security Indicator Lamp)
Check .................................................................. ... 95
Front Door Lock Assembly LH (Key Cylinder Switch)
Check .................................................................. ... 96
Vehicle Security Horn Alarm Check ..................... ... 98
Vehicle Security Headlamp Alarm Check ............ ... 98
Door Lock/Unlock Switch Check ............................ 98
AUTOMATIC BACK DOOR SYSTEM .................... ... 99
Component Parts and Harness Connector Location ... 99
System Description .............................................. .100
OPERATION DESCRIPTION ........................... .100
Schematic ............................................................ .105Wiring Diagram — B/CLOS — .............................
.106
Terminals and Reference Value for Back Door Con-
trol Unit ................................................................. . 111
Terminals and Reference Value for BCM ............. .112
Trouble Diagnosis Procedure ............................... .113
Self-Diagnosis Procedures .................................. .113
INPUT SIGNAL CHECK MODE ........................ .113
OPERATING CHECK MODE ............................ .113
Diagnosis Chart ................................................... .114
Back Door Power Supply and Ground Circuit
Inspection ............................................................. .115
Power Liftgate Switch System Inspection ............ .116
GLASS HATCH AJAR SWITCH CHECK .......... .117
Back Door Close (Close) Switch System Inspection .118
Back Door Close (Cancel) Switch System Inspec-
tion ....................................................................... .119
Pinch Strip System Inspection ............................. .121
Back Door Warning Chime System Inspection .... .122
Half-Latch Switch System Inspection ................... .122
Open Switch System Inspection .......................... .123
Close Switch System Inspection .......................... .124
Back Door Handle Switch System Inspection ...... .125
Cinch Latch Motor System Inspection ................. .126
DOOR ..................................................................... .128
Fitting Adjustment ................................................ .128
FRONT DOOR .................................................. .128
REAR DOOR .................................................... .128
STRIKER ADJUSTMENT ................................. .128
Removal and Installation ...................................... .129
FRONT DOOR .................................................. .129
REAR DOOR .................................................... .129
BACK DOOR .................................................... .130
FRONT DOOR LOCK ............................................. .131
Component Structure ........................................... .131
Removal and Installation ...................................... .131
REMOVAL ......................................................... .131
INSTALLATION ................................................. .133
Disassembly and Assembly ................................. .133
DOOR KEY CYLINDER ASSEMBLY ................ .133
REAR DOOR LOCK ............................................... .134
Component Structure ........................................... .134
Removal and Installation ...................................... .134
REMOVAL ......................................................... .134
INSTALLATION ................................................. .134
BACK DOOR LOCK ............................................... .135
Power Back Door Opener .................................... .135
REMOVAL ........................................................ .135
INSTALLATION ................................................ .135
Door Lock Assembly ............................................ .136
REMOVAL ........................................................ .136
INSTALLATION ................................................ .136
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ..................................................................... .137
Component Parts and Harness Connector Location .137
System Description .............................................. .138
System Composition ............................................ .138
ECM Re-communicating Function ....................... .139
Wiring Diagram — NATS — ................................. .140
Terminals and Reference Value for BCM ............. .141

POWER DOOR LOCK SYSTEMBL-25
C
DE
F
G H
J
K L
M A
B
BL
Revision: November 2009 2006 QX56
Terminals and Reference Value for BCMEIS005ZB
Work FlowEIS005ZC
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to BL-17, "
System Description" .
3. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to BL-29,
"Trouble Diagnoses Symptom Chart" .
4. Does power door lock system operate normally? OK: GO TO 5, NG: GO TO 3.
5. Inspection End.
Te r m i n a l Wire
Color Item
Condition Voltage (V)
(Approx.)
12 R/L Front door switch RH Door open (ON) → Door close (OFF) 0 → Battery voltage
13 GR Rear door switch RH Door open (ON) → Door close (OFF) 0 → Battery voltage
22 W/V Bus When ignition switch is ON or power
window timer operates
30 Y/BR Glass hatch switch Glass hatch switched released
→ Glass
hatch switched closed Battery voltage
→ 0
37 B/R Key switch and key lock sole-
noid (insert) Key inserted in IGN key cylinder (ON)
→
Key removed from IGN key cylinder (OFF) Battery voltage
→ 0
39 L CAN-H ——
40 P CAN-L ——
43 R/B Back door latch (door ajar
switch) Door open (ON)
→ Door close (OFF) 0 → Battery voltage
47 SB Front door switch LH Door open (ON) → Door close (OFF) 0 → Battery voltage
48 R/Y Rear door switch LH Door open (ON) → Door close (OFF) 0 → Battery voltage
53 L/W Glass hatch lock actuator Glass hatch switched released
→ Glass
hatch switch pressed 0
→ Battery voltage for 300 msec.
57 Y/R Battery power supply —Battery voltage
59 G Front door lock assembly LH
(actuator) (unlock) Driver door lock knob
(locked → unlocked) 0
→ Battery voltage
65 V All door lock actuators (lock) Driver door lock knob (neutral → lock) 0 → Battery voltage
66 G/Y Front door lock actuator RH,
rear door lock actuators LH/RH
and back door lock actuator
(unlock) Door lock and unlock switch (locked
→
unlocked) 0
→ Battery voltage
67 B Ground ——
70 W/B Battery power supply —Battery voltage
PIIA2344E

BL-30
POWER DOOR LOCK SYSTEM
Revision: November 20092006 QX56
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM connector M20 terminals 57, 70 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Check continuity between BCM connector M20 terminal 67 and
ground.
OK or NG
OK >> Power supply and ground circuit is OK.
NG >> Repair or replace harness.
Connector Terminals
Voltage (V)
(Approx.)
(+) (-)
M20 57
Ground Battery voltage
70
LIIA1039E
Connector TerminalsContinuity
M20 67Ground Yes
LIIA1040E

POWER DOOR LOCK SYSTEMBL-31
C
DE
F
G H
J
K L
M A
B
BL
Revision: November 2009 2006 QX56
Door Switch CheckEIS005ZG
1. CHECK DOOR SWITCHES INPUT SIGNAL
With CONSULT-II
Check door switches ("DOOR SW-DR", "DOOR SW-AS", "DOOR SW-RL", "DOOR SW-RR", "BACK DOOR
SW") in DATA MONITOR mode with CONSULT –II.Refer to BL-27, "
DATA MONITOR" .

When doors are open:

When doors are closed:
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. DOOR SW-DR : ON
DOOR SW-AS : ON
DOOR SW-RL : ON
DOOR SW-RR : ON
BACK DOOR SW : ON
DOOR SW-DR : OFF
DOOR SW-AS : OFF
DOOR SW-RL : OFF
DOOR SW-RR : OFF
BACK DOOR SW : OFF
LIIA0665E
Connector Item
Terminals
ConditionVoltage (V)
(Approx.)
(+) ( –)
M19 Back door
latch (door
ajar switch) 43
Ground Open
↓
Closed 0
↓
Battery voltage
Front door
switch LH 47
Rear door switch LH 48
M18 Front door
switch RH 12
Rear door
switch RH 13
LIIA1041E

POWER DOOR LOCK SYSTEMBL-33
C
DE
F
G H
J
K L
M A
B
BL
Revision: November 2009 2006 QX56
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) CheckEIS005ZH
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-27, "
DATA MONI-
TOR" .

When key is inserted to ignition key cylinder:

When key is removed from ignition key cylinder:
Without CONSULT-II
Check voltage between BCM connector M18 terminal 37 and
ground.
OK or NG
OK >> Key switch (insert) circuit is OK.
NG >> GO TO 2. 8 - Ground
: Continuity should exist.
LIIA0828E
KEY ON SW : ON
KEY ON SW : OFF
LIIA0169E
ConnectorTe r m i n a l s
ConditionVoltage (V)
(+) ( –)
M18 37 Ground Key is inserted. Battery voltage
Key is removed. 0
LIIA0567E

BL-38
POWER DOOR LOCK SYSTEM
Revision: November 20092006 QX56
Front Door Lock Assembly LH (Actuator) CheckEIS005ZK
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-20, "
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-131, "FRONT DOOR LOCK" .
NG >> Repair or replace harness.
Connector Te r m i n a l s
Condition Voltage (V)
(Approx.)
(+) (-)
M20 59
Ground Driver door lock/unlock
switch is turned to
UNLOCK
0
→ Battery voltage
65 Driver door lock/unlock
switch is turned to LOCK 0
→ Battery voltage
LIIA1046E
Connector Terminals Connector Terminals Continuity
M20 59
D14 2Y
es
65 3Yes
Connector Terminals Continuity
M20 59
Ground No
65 No
LIIA1574E