alarm INFINITI QX56 2004 Factory Service Manual

BCS-8
BCM (BODY CONTROL MODULE)
Revision: August 20072004 QX56
CAN Communication System DescriptionEKS007GF
Refer to LAN-5, "CAN COMMUNICATION" .
Power supply (BAT) to power window and
sunroofBattery power supply Power supply to power window and sunroof system
Panic alarm

Key switch

KeyfobIPDM E/R
Auto light system

Auto light sensor

Combination switchIPDM E/R
Battery saver control

Ignition switch

Combination switch

Front door switch LH

Front door switch RHIPDM E/R
Headlamp Combination switch IPDM E/R
Tail lamp Combination switch IPDM E/R
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

Keyfob

Main power window and door
lock/unlock switch

Front door lock assembly LH
(key cylinder switch)

All door switchInterior room lamp
Key warning chime

Key switch

Front door switch LHCombination meter (warning buzzer)
Light warning chime

Combination switch

Key switch

Front door switch LHCombination meter (warning buzzer)
Vehicle-speed-sensing intermittent wiper

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 Combination switch Trailer turn signal lamp
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 switch

Glass hatch ajar switch

IPDM E/R

Security indicator lamp System Input Output

BL-2Revision: August 20072004 QX56 Trouble Diagnosis Procedure ................................. 59
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 ....... 76
INITIAL CONDITION TO ACTIVATE THE SYS-
TEM ..................................................................... 77
VEHICLE SECURITY SYSTEM ALARM OPER-
ATION .................................................................. 78
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 .......... 87
CONSULT-II APPLICATION ITEM ....................... 89
Trouble Diagnosis ................................................... 90
WORK FLOW ...................................................... 90
Preliminary Check .................................................. 91
Symptom Chart ....................................................... 92
Door Switch Check ................................................. 93
Hood Switch Check ................................................ 95
Combination Meter (Security Indicator Lamp)
Check ..................................................................... 97
Front Door Lock Assembly LH (Key Cylinder Switch)
Check ..................................................................... 98
Vehicle Security Horn Alarm Check ......................100
Vehicle Security Headlamp Alarm Check .............100
Door Lock/Unlock Switch Check ..........................100
AUTOMATIC BACK DOOR SYSTEM .....................101
Component Parts and Harness Connector Location .101
System Description ...............................................102
OPERATION DESCRIPTION ............................102Schematic ............................................................. 107
Wiring Diagram — B/CLOS — .............................. 108
Terminals and Reference Value for Back Door Con-
trol Unit ..................................................................113
Terminals and Reference Value for BCM ..............114
Trouble Diagnosis Procedure ................................115
Self-Diagnosis Procedures ...................................115
INPUT SIGNAL CHECK MODE .........................115
OPERATING CHECK MODE .............................115
Diagnosis Chart ....................................................116
Back Door Power Supply and Ground Circuit
Inspection ..............................................................117
Power Liftgate Switch System Inspection .............118
GLASS HATCH AJAR SWITCH CHECK ...........119
Back Door Close (Close) Switch System Inspection . 120
Back Door Close (Cancel) Switch System Inspec-
tion ........................................................................ 121
Pinch Strip System Inspection .............................. 122
Back Door Warning Chime System Inspection ..... 123
Half-Latch Switch System Inspection .................... 124
Open Switch System Inspection ........................... 125
Close Switch System Inspection ........................... 126
Back Door Handle Switch System Inspection ....... 127
Cinch Latch Motor System Inspection .................. 128
DOOR ...................................................................... 129
Fitting Adjustment ................................................. 129
FRONT DOOR ................................................... 129
REAR DOOR ..................................................... 129
STRIKER ADJUSTMENT .................................. 129
Removal and Installation ....................................... 130
FRONT DOOR ................................................... 130
REAR DOOR ..................................................... 130
BACK DOOR ..................................................... 131
FRONT DOOR LOCK .............................................. 132
Component Structure ............................................ 132
Removal and Installation ....................................... 132
REMOVAL .......................................................... 132
INSTALLATION .................................................. 134
Disassembly and Assembly .................................. 134
DOOR KEY CYLINDER ASSEMBLY ................. 134
REAR DOOR LOCK ................................................ 135
Component Structure ............................................ 135
Removal and Installation ....................................... 135
REMOVAL .......................................................... 135
INSTALLATION .................................................. 135
BACK DOOR LOCK ................................................ 136
Power Back Door Opener ..................................... 136
REMOVAL ......................................................... 136
INSTALLATION ................................................. 136
Door Lock Assembly ............................................. 137
REMOVAL ......................................................... 137
INSTALLATION ................................................. 137
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ...................................................................... 138
Component Parts and Harness Connector Location . 138
System Description ............................................... 139
System Composition ............................................. 139
ECM Re-communicating Function ........................ 140
Wiring Diagram — NATS — .................................. 141

REMOTE KEYLESS ENTRY SYSTEM
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System DescriptionEIS002RP
INPUTS
Power is supplied at all times

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 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 in ACC or ON position, power is supplied

to BCM terminal 11

through 10A fuse [No. 4, located in the fuse block (J/B)].
When the ignition switch is in ON or START position, 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.
When the glass hatch ajar switch is ON (glass hatch is OPEN), ground is supplied

to BCM terminal 42

through glass hatch ajar switch

through glass hatch ajar switch case ground.
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

BL-48
REMOTE KEYLESS ENTRY SYSTEM
Revision: August 20072004 QX56
Remote keyless entry system turns on interior lamp and ignition keyhole illumination (for 30 seconds) with
input of UNLOCK signal from keyfob.
For detailed description, refer to LT- 1 3 1 , "
ROOM LAMP TIMER OPERATION" .
Panic Alarm Operation
When key switch is OFF (ignition key is not inserted in key cylinder), remote keyless entry system turns on and
off horn and headlamp intermittently with input of PANIC ALARM signal from keyfob.
The alarm automatically turns off after 25 seconds or when BCM receives any signal from keyfob.
Keyless Power Window Down (Open) Operation
When keyfob unlock switch is turned ON with ignition switch OFF, and the switch is detected to be on continu-
ously for 3 seconds, the driver's door and passenger's door power windows are simultaneously opened.
Power window is operated to open and the operation continues as long as the keyfob unlock switch is
pressed.
CAN Communication System DescriptionEIS002RQ
Refer to LAN-5, "CAN COMMUNICATION" .

REMOTE KEYLESS ENTRY SYSTEM
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Active Test
Work Support
CDL UNLOCK SW Indicates [ON/OFF] condition of unlock signal from lock/unlock switch.
CDL LOCK SW Indicates [ON/OFF] condition of lock signal from lock/unlock switch.
DOOR SW-RL Indicates [ON/OFF] condition of rear door switch LH.
DOOR SW-RR Indicates [ON/OFF] condition of rear door switch RH.
RKE LCK-UNLCK Indicates [ON/OFF] condition of lock/unlock signal at the same time from keyfob.
RKE KEEP UNLK Indicates [ON/OFF] condition of unlock signal from keyfob.
TRNK OPN MNTR Indicates [ON/OFF] condition of glass open switch.Monitored Item Description
Test Item Description
FLASHER This test is able to check right and left hazard reminder operation. The right hazard lamp turns on
when “RH” on CONSULT-II screen is touched and the left hazard lamp turns on when "LH" on CON-
SULT-II screen is touched.
POWER WINDOW DOWN This test is able to check power window down operation. The windows are lowered when “ON” on
CONSULT-II screen is touched.
HORN This test is able to check panic alarm and horn reminder operations. The alarm activate for 0.5 sec-
onds after “ON” on CONSULT-II screen is touched.
DOOR LOCK This test is able to check door lock operation. The doors lock and unlock based on the item on CON-
SULT-II screen touched.
TRUNK/BACK DOOR This test is able to check back door actuator operation. The back door is opened when “OPEN” on
CONSULT-II screen is touched.
PSB/PBD OPEN TESTThis test is able to check power back door operation. The power back door is fully opened when
“OPEN” on the CONSULT-II screen is touched if the door operation enable conditions are met.
Test Item Description
REMO CONT ID REGIST Keyfob ID code can be registered.
REMO CONT ID ERASUR Keyfob ID code can be erased.
REMO CONT ID CONFIR It can be checked whether keyfob ID code is registered or not in this mode.
HORN CHIRP SET Horn chirp function mode can be changed in this mode. The function mode will be changed when
"CHANG SETT" on CONSULT-II screen is touched.
HAZARD LAMP SET Hazard lamp function mode can be changed in this mode. The function mode will be changed when
"CHANG SETT" on CONSULT-II screen is touched.
MULTI ANSWER BACK SETHazard and horn reminder mode can be changed in this mode. The reminder mode will be changed
when “CHANG SETT” on CONSULT-II screen is touched.
AUTO LOCK SETAuto locking function mode can be changed in this mode. The function mode will be changed when
"CHANG SETT" on CONSULT-II screen is touched.
PANIC ALRM SETPanic alarm operation mode can be changed in this mode. The operation mode will be changed
when "CHANG SETT" on CONSULT-II screen is touched.
TRUNK OPEN SETBack door opener operation mode can be changed in this mode. The operation mode will be
changed when "CHANG SETT" on CONSULT-II screen is touched.
PW DOWN SETKeyless power window down (open) operation mode can be changed in this mode. The operation
mode will be changed when "CHANG SETT" on CONSULT-II screen is touched.

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REMOTE KEYLESS ENTRY SYSTEM
Revision: August 20072004 QX56
Hazard and horn reminder mode
Auto locking function mode
Panic alarm operation mode
Back door open operation mode
Keyless power window down operation mode
MODE 1
(C mode)MODE 2
(S mode)MODE 3MODE 4MODE 5MODE 6
Keyfob
operation Lock Unlock Lock Unlock Lock Unlock Lock Unlock Lock Unlock Lock Unlock
Hazard warning
lamp flashTwiceOnceTwice———TwiceOnceTwice——Once
Horn sound Once———————Once—Once—
MODE 1MODE 2MODE 3
Auto locking function 5 minutes Nothing 1 minute
MODE 1MODE 2MODE 3
Keyfob operation 0.5 seconds Nothing 1.5 seconds
MODE 1MODE 2MODE 3
Keyfob operation 0.5 seconds Nothing 0.5 seconds
MODE 1 MODE 2 MODE 3
Keyfob operation 3 seconds Nothing 5 seconds

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REMOTE KEYLESS ENTRY SYSTEM
Revision: August 20072004 QX56
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.
Trouble DiagnosesEIS002S0
SYMPTOM CHART
NOTE:

Always check the "Trouble Diagnosis Procedure" before troubleshooting. Refer to BL-59, "Trouble Diag-
nosis Procedure" .

Always check keyfob battery before replacing keyfob. Refer to BL-65, "Keyfob Battery and Function
Check" .

The panic alarm operation and power back door opener operation of remote keyless entry system do not
activate with the ignition key inserted in the ignition key cylinder.

Use Remote Keyless Entry Tester J-43241 (follow instructions on tester) to check operation of keyfob
before replacing keyfob.
ConnectorTe r m i n a l s
(Wire color)
Continuity
(+) (-)
M20 67 (B) Ground Yes
LIIA1040E
Symptom Diagnoses/service procedureReference
page
All functions of remote keyless entry system do not
operate.1. Keyfob battery and function check (use Remote Keyless Entry
Tester J-43241)
NOTE:
If the result of keyfob function check is OK, keyfob is not malfunc-
tioning.BL-65
2. Check BCM and keyless receiver.BL-66
The new ID of keyfob cannot be entered.1. Keyfob battery and function check (use Remote Keyless Entry
Tester J-43241)
NOTE:
If the result of keyfob function check is OK, keyfob is not malfunc-
tioning.BL-652. Key switch and key lock solenoid (insert) checkBL-62
3. Door switch checkBL-63
4. ACC power checkBL-68
5. Replace BCM.BCS-19
Door lock or unlock does not function.
(If the power door lock system does not operate
manually, check power door lock system. Refer to
BL-16, "
POWER DOOR LOCK SYSTEM" )1. Keyfob battery and function check (use Remote Keyless Entry
Tester J-43241)
NOTE:
If the result of keyfob function check is OK, keyfob is not malfunc-
tioning.BL-65
2. Replace BCM.BCS-19
Hazard and horn reminder does not activate prop-
erly when pressing lock or unlock button of keyfob.1. Check hazard and horn reminder mode with CONSULT-II
NOTE:
Hazard and horn reminder mode can be changed.
First check the hazard and horn reminder mode setting.BL-57
2. Door switch checkBL-63
3. Replace BCM.BCS-19

REMOTE KEYLESS ENTRY SYSTEM
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Hazard reminder does not activate properly when
pressing lock or unlock button of keyfob.
(Horn reminder OK)1. Check hazard reminder mode with CONSULT-II
NOTE:
Hazard reminder mode can be changed.
First check the hazard reminder mode setting.BL-57
2. Check hazard function with hazard switch —
3. Replace BCM.BCS-19
Horn reminder does not activate properly when
pressing lock or unlock button of keyfob.
(Hazard reminder OK)1. Check horn reminder mode with CONSULT-II
NOTE:
Horn reminder mode can be changed.
First check the horn reminder mode setting.BL-57
2. Check horn function with horn switch —
3. IPDM E/R operation checkBL-68
4. Replace BCM.BCS-19
Back door open/close operation is not carried out
with keyfob operation.
(The automatic back door system is normal.)1. Keyfob battery and function check (use Remote Keyless Entry
Tester J-43241)BL-652. Key switch (insert) checkBL-62
3. Check that glass hatch is closed —
4. Remote keyless entry receiver systemBL-68
5. Replace BCM.BCS-19
Room lamp, ignition keyhole illumination and step
lamp operation do not activate properly.1. Room lamp operation checkBL-70
2. Ignition kehole illumination operation checkBL-70
3.Step lamp operation checkLT- 1 3 0
4. Door switch checkBL-63
5. Replace BCM.BCS-19
Panic alarm (horn and headlamp) does not activate
when panic alarm button is continuously pressed.1. Keyfob battery and function check (use Remote Keyless Entry
Tester J-43241)
NOTE:
If the result of keyfob function check is OK, keyfob is not malfunc-
tioning.BL-65
2. Key switch and key lock solenoid (insert) checkBL-62
3. Replace BCM.BCS-19
Auto door lock operation does not activate properly.
(All other remote keyless entry functions OK.)1. Check auto door lock operation mode with CONSULT-II
NOTE:
Auto door lock operation mode can be changed.
First check the auto door lock operation mode setting.BL-57
2. Replace BCM.BCS-19
Keyless power window down (open) operation does
not activate properly.
(All other remote keyless entry functions OK.)1. Check power window down operation mode with CONSULT-II
NOTE:
Power window down operation mode can be changed.
First check the power window down operation mode setting.BL-57
2. Check power window function with switch —
3. Replace BCM.BCS-19
Symptom Diagnoses/service procedureReference
page

BL-76
VEHICLE SECURITY (THEFT WARNING) SYSTEM
Revision: August 20072004 QX56
System DescriptionEIS002SE
DESCRIPTION
Operation Flow

Setting the vehicle security system
Initial condition

Ignition switch is in OFF position.
Disarmed phase

When the vehicle is being driven or when doors or glass hatch is open, the vehicle security system is set
in the disarmed phase on the assumption that the owner is inside or near the vehicle.
Pre-armed phase and armed phase

There are three conditions to enable the vehicle security system to turn into the "pre-armed" phase and
transition into armed phase. The initial requirements are that hood, glass hatch and all doors must be
closed (ignition key removed) for the transition to take place. Those three conditions are:
1. Locking vehicle with either front power door lock switch before exiting vehicle and closing all doors.
2. Using keyfob to lock already closed doors after leaving the vehicle.
3. Using driver key cylinder switch to lock already closed doors after leaving the vehicle.

Upon any of the above three steps taking place, the security indicator lamp illuminates for 30 seconds,
then the system automatically shifts into the "armed" phase.
Canceling the set vehicle security system
When one of the following operations is performed, the armed phase is canceled.
1. Unlock the doors with the key or the keyfob.
2. Open the power back door with the keyfob. When the power back door is closed after opening the power
back door with the keyfob, the system returns to the armed phase.
Activating the alarm operation of the vehicle security system
Make sure the system is in the armed phase.
When one of the following operations is performed, the system sounds the horns and flashes the headlamps
for about 50 seconds.
1. Engine hood, glass hatch or any door is opened before unlocking door with key or keyfob.
2. Door is unlocked without using key or keyfob.
3. Power back door is opened without using the keyfob.
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times

through 10A fuse [No.19, located in the fuse block (J/B)]
PIIA1367E

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VEHICLE SECURITY (THEFT WARNING) SYSTEM
Revision: August 20072004 QX56
When the hood switch is ON (hood is open) ground is supplied

to IPDM E/R terminal 41

through hood switch terminal 2

through hood switch terminal 1

through grounds E9, E15 and E24.
VEHICLE SECURITY SYSTEM ALARM OPERATION
The vehicle security system is triggered by

opening a door

opening the hood

opening the glass hatch

unlocking door without using the key or keyfob.
The vehicle security system will be triggered once the system is in armed phase,

when BCM receives a ground signal at terminals 12, 13, 47, 48 (door switch), terminal 42 (glass hatch ajar
switch) or terminal 43 [back door latch (door ajar switch)], or IPDM E/R terminal 41 (hood switch) receives
a ground signal.
Power is supplied at all times

to horn relay terminal 2

through 15A fuse (No. 25, located in fuse and fusible link box).
When the vehicle security system is triggered, ground is supplied intermittently

from IPDM E/R terminal 45

to headlamp high relay and

to horn relay terminal 1.
The headlamps flash and the horn sounds intermittently.
The alarm automatically turns off after 50 seconds, but will reactivate if the vehicle is tampered with again.
VEHICLE SECURITY SYSTEM DEACTIVATION
To deactivate the vehicle security system, a door must be unlocked with the key or keyfob.
When the key is used to unlock the front door LH, BCM terminal 22 receives signal

from terminal 14 of the main power window and door lock/unlock switch.
When the BCM receives this signal or unlock signal from keyfob, the vehicle security system is deactivated.
(Disarmed phase)
PANIC ALARM OPERATION
Remote keyless entry system may or may not operate vehicle security system (horn and headlamps) as
required.
When the remote keyless entry system is triggered, ground is supplied intermittently

from IPDM E/R terminal 45

to headlamp high relay and

to horn relay terminal 1.
The headlamp flashes and the horn sounds intermittently.
The alarm automatically turns off after 25 seconds or when BCM receives any signal from keyfob.
CAN Communication System DescriptionEIS002SF
Refer to LAN-5, "CAN COMMUNICATION" .