keyless INFINITI QX56 2007 Factory Service Manual

BCS-6
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
• When CAN communication operation is detected, it switches to CAN communication status.
• When a state of the following switches changes, it switches to CAN communication state:
- Ignition switch
- Key switch (insert)
- Hazard switch
- Main door lock/unlock switch
- Front door switch (LH, RH)
- Rear door switch (LH, RH)
- Back latch (door ajar switch)
- Glass hatch ajar switch
- Combination switch (passing, lighting switch 1st position, front fog lamp)
- Keyfob (lock/unlock signal)
- Front door lock assembly LH (key cylinder switch)
• When control performed only by BCM is required by switch, it shifts to CAN communication inactive
mode.
• Status of combination switch reading function is changed.
SYSTEMS CONTROLLED BY BCM DIRECTLY
• Power door lock system. Refer to BL-15.
• Remote keyless entry system. Refer to BL-37
.
• Power window system. Refer to GW-15
. NOTE
• Sunroof system. Refer to RF-10. NOTE
• Room lamp timer. Refer to LT-101.
• Warning chime system. Refer to DI-36
.
• Turn signal and hazard warning lamps system. Refer to LT- 5 7
.
• Trailer turn signal and hazard warning lamps system (if equipped). Refer to LT- 9 4
.
• Rear wiper and washer system. Refer to WW-26
.
NOTE:
Power supply only. No system control.
SYSTEMS CONTROLLED BY BCM AND IPDM E/R
• Panic system. Refer to BL-37.
• Vehicle security system. Refer to BL-60
.
• IVIS (NATS) system. Refer to BL-116
.
• Headlamp, tail lamp, front fog lamp, auto light and battery saver control systems. Refer to LT- 5
, LT- 2 4, LT- 8 2,
LT- 4 9
or LT- 3 4.
• Front wiper and washer system. Refer to WW-3
.
• Rear window defogger system. Refer to GW-68
.
MAJOR COMPONENTS AND CONTROL SYSTEM
System Input Output
Remote keyless entry system Remote keyless entry receiver (keyfob)• All door locking actuators
• Back door opener actuator
• Turn signal lamps
Power door lock system• Front power door lock/unlock switch (LH, RH)
• All door switches
• Key switchAll door locking actuators
Power supply [ignition (IGN)/retained ac-
cessory power (RAP)] to power window
and sunroofIGN/RAP supplyPower supply to power window and
sunroof system
Power supply (BAT) to power window
and sunroofBattery power supplyPower supply to power window and
sunroof system
Panic alarm• Key switch
• Remote keyless entry receiver (keyfob)IPDM E/R
Auto light system• Optical sensor
• Combination switchIPDM E/R
Battery saver control• Ignition switch
• Combination switch
• Front door switch LH and RHIPDM E/R

BCM (BODY CONTROL MODULE)
BCS-7
< SERVICE INFORMATION >
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CAN Communication System DescriptionINFOID:0000000003533597
Refer to LAN-4.
Headlamp Combination switch IPDM E/R
Tail lamp Combination switch IPDM E/R
Front fog lamp Combination switch IPDM E/R
Turn signal lamp Combination switch• Turn signal lamp
• Combination meter
Hazard lamp Hazard switch• Turn signal lamp
• Combination meter
Room lamp timer• Key switch
• Remote keyless entry receiver (keyfob)
• Main power window and door lock/unlock switch
• Front door lock assembly LH (key cylinder switch)
• All door switchesInterior room lamp
Key warning chime• Key switch
• Front door switch LHCombination meter (warning buzz-
er)
Light warning chime• Combination switch
• Key switch
• Front door switch LHCombination meter (warning buzz-
er)
Vehicle-speed-sensing intermittent wip-
er• Combination switch
• Combination meterIPDM E/R
Rear window defogger Rear window defogger switch IPDM E/R
Air conditioner switch signal Front air control ECM
Blower fan switch signal Front air control ECM
Low tire pressure warning system Remote keyless entry receiver• Combination meter
• Display control unit
Trailer tow (if equipped) Combination switch Trailer turn signal relays
Vehicle security system• Remote keyless entry receiver (keyfob)
• Main power window and door lock/unlock switch
• Power window and door lock/unlock switch RH
• Front door lock assembly LH (key cylinder switch)
• All door switches
• Back door latch (door ajar switch)• IPDM E/R
• Security indicator lamp System Input Output

BCS-12
< SERVICE INFORMATION >
BCM (BODY CONTROL MODULE)
18 PRemote keyless entry
receiver and optical
sensor (ground)Output OFF — 0V
19 V/WRemote keyless entry
receiver (power sup-
ply)Output OFF Ignition switch OFF
20 G/WRemote keyless entry
receiver signal (Sig-
nal)Input OFFStand-by (keyfob buttons re-
leased)
When remote keyless entry
receiver receives signal from
keyfob (keyfob buttons
pressed)
21 G NATS antenna amp. InputOFF →
ONIgnition switch (OFF → ON)Just after turning ignition switch
ON: Pointer of tester should
move for approx. 1 second, then
return to battery voltage.
22 W/V BUS — —Ignition switch ON or power
window timer operates
23 G/OSecurity indicator
lampOutput OFFGoes OFF → illuminates (Ev-
ery 2.4 seconds)Battery voltage → 0V
25 BR NATS antenna amp. InputOFF →
ONIgnition switch (OFF → ON)Just after turning ignition switch
ON: Pointer of tester should
move for approx. 1 second, then
return to battery voltage.
26 Y/LRear wiper auto stop
switch 2Input ONRise up position (rear wiper
arm on stopper)0V
A Position (full clockwise stop
position)0V
Forward sweep (counterclock-
wise direction)Fluctuating
B Position (full counterclock-
wise stop position)Battery voltage
Reverse sweep (clockwise di-
rection)Fluctuating Te r m i n a lWire
colorSignal nameSignal
input/
outputMeasuring condition
Reference value or waveform
(Approx.) Ignition
switchOperation or condition
LIIA1893E
LIIA1894E
LIIA1895E
PIIA2344E

BCM (BODY CONTROL MODULE)
BCS-17
< SERVICE INFORMATION >
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CONSULT-II START PROCEDURE
Refer to GI-36, "CONSULT-II Start Procedure".
ITEMS OF EACH PART
NOTE:
CONSULT-II will only display systems the vehicle possesses.
WORK SUPPORT
BCM diagnostic
test itemDiagnostic mode Content
Inspection by partWORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the BCM for
setting the status suitable for required operation, input/output signals are received
from the BCM and received data is displayed.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT
MNTRThe results 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.
System and itemCONSULT-II
displayDiagnostic test mode (Inspection by part)
WORK
SUPPORTSELF−
DIAG RE-
SULTSCAN DIAG
SUPPORT
MNTRDATA
MONITORECU
PA R T
NUMBERAC-
TIVE
TESTCON-
FIGU-
RATION
BCM BCM×× × × ×
Power door lock system DOOR LOCK×××
Rear defoggerREAR
DEFOGGER××
Warning chime BUZZER××
Room lamp timer INT LAMP×××
Remote keyless entry
systemMULTI REMOTE
ENT×××
Headlamp HEAD LAMP×××
Wiper (front/rear) WIPER×××
Turn signal lamp
Hazard lampFLASHER××
Blower fan switch signal
Air conditioner switch
signalAIR
CONDITIONER×
Combination switch COMB SW×
IVIS (NATS) IMMU××
Interior lamp battery
saverBATTERY SAV-
ER×××
Back door TRUNK××
Theft alarm THEFT ALM×××
Retained accessory
power controlRETAINED PWR×××
Oil pressure switch SIGNAL BUFFER××
Low tire pressure moni-
tor systemAIR PRESSURE
MONITOR×× × ×
Panic alarm PANIC ALARM×

BL-1
BODY
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SECTION BL
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CONTENTS
BODY, LOCK & SECURITY SYSTEM
SERVICE INFORMATION ............................3
PRECAUTIONS ...................................................3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
3
Precaution for work ...................................................3
PREPARATION ...................................................4
Special Service Tool .................................................4
Commercial Service Tool ..........................................4
SQUEAK AND RATTLE TROUBLE DIAGNO-
SIS .......................................................................
5
Work Flow .................................................................5
Generic Squeak and Rattle Troubleshooting ............7
Diagnostic Worksheet ...............................................9
HOOD .................................................................11
Fitting Adjustment ...................................................11
Removal and Installation of Hood Assembly ...........12
Removal and Installation of Hood Lock Control ......13
Hood Lock Control Inspection .................................14
POWER DOOR LOCK SYSTEM ........................15
Component Parts and Harness Connector Loca-
tion ..........................................................................
15
System Description .................................................15
Schematic ...............................................................18
Wiring Diagram - D/LOCK - .....................................19
Terminal and Reference Value for BCM .................23
Work Flow ...............................................................23
CONSULT-II Function (BCM) ..................................24
Trouble Diagnosis Symptom Chart .........................25
BCM Power Supply and Ground Circuit Inspection
....
25
Door Switch Check ..................................................25
Key Switch (Insert) Check .......................................27
Door Lock/Unlock Switch Check .............................28
Glass Hatch Switch Circuit Inspection ....................30
Front Door Lock Assembly LH (Actuator) Check ....32
Front Door Lock Actuator RH Check .......................32
Rear Door Lock Actuator RH/LH Check ..................33
Glass Hatch Lock Actuator Check ...........................34
Front Door Lock Assembly LH (Key Cylinder
Switch) Check ..........................................................
35
REMOTE KEYLESS ENTRY SYSTEM .............37
Component Parts and Harness Connector Loca-
tion ...........................................................................
37
System Description ..................................................37
CAN Communication System Description ...............40
Schematic ................................................................41
Wiring Diagram - KEYLES - ....................................42
Terminal and Reference Value for BCM ..................44
Terminal and Reference Value for IPDM E/R ..........44
CONSULT-II Function (BCM) ..................................45
CONSULT-II Start Procedure ..................................45
CONSULT-II Application Item ..................................45
Trouble Diagnosis Procedure ..................................47
BCM Power Supply and Ground Circuit Inspection
....
47
Trouble Diagnosis ....................................................47
Key Switch (Insert) Check .......................................49
Door Switch Check ..................................................49
Keyfob Battery and Function Check ........................52
Remote Keyless Entry Receiver System Inspec-
tion ...........................................................................
53
ACC Power Check ...................................................54
IPDM E/R Operation Check .....................................54
Check Hazard Function ...........................................55
Check Horn Function ...............................................55
Check Headlamp Function ......................................55
Check Map Lamp Illumination Function ..................56
ID Code Entry Procedure ........................................56
Keyfob Battery Replacement ...................................59
VEHICLE SECURITY (THEFT WARNING)
SYSTEM ............................................................
60
Component Parts and Harness Connector Loca-
tion ...........................................................................
60
System Description ..................................................61

BL-4
< SERVICE INFORMATION >
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000003532886
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolINFOID:0000000003532887
Tool number
(Kent-Moore No.)
Tool nameDescription
—
(J-39570)
Chassis earLocating the noise
—
(J-43980)
NISSAN Squeak and Rat-
tle KitRepairing the cause of noise
—
(J-43241)
Remote Keyless Entry
Te s t e rUsed to test keyfobs
SIIA0993E
SIIA0994E
LEL946A
Tool name
(Kent-Moore No.)Description
Engine ear
(J-39565)Locating the noise
SIIA0995E

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.

REMOTE KEYLESS ENTRY SYSTEM
BL-37
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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
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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)