2005 INFINITI QX4 key fob

VEHICLE SECURITY (THEFT WARNING) SYSTEM
BL-77
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: October 20052005 QX56
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)]

to combination meter (security indicator lamp) terminal 8 and

through 50A fusible link (letter f , located in the fuse and fusible link box)

to BCM terminal 70.

through 15A fuse [No. 22, located in the fuse block (J/B)]

to BCM terminal 57.

through 15A fuse (No. 25, located in the fuse and fusible link box)

to horn relay terminal 2.

through 20A fuse (No. 52, located in the IPDM E/R) and

through 20A fuse (No. 53, located in the IPDM E/R),

to IPDM E/R internal CPU.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 4, located in the fuse block (J/B)]

to BCM terminal 11.
Ground is supplied

to BCM terminal 67

through body grounds M57, M61 and M79 and

to IPDM E/R terminals 38 and 59

through body ground E9, E15 and E24.
INITIAL CONDITION TO ACTIVATE THE SYSTEM
The operation of the vehicle security system is controlled by the doors, hood and glass hatch.
To activate the vehicle security system, BCM must receive signals indicating the doors, hood and glass hatch
are closed and the doors are locked.
When a door is open, BCM terminal 12, 13, 42, 47 or 48 receives a ground signal from each door switch.
When front door LH is unlocked, BCM terminal 22 receives a signal from terminal 14 of main power window
and door lock/unlock switch.
When front door RH is unlocked, BCM terminal 22 receives a signal from terminal 16 of power window and
door lock/unlock switch RH or the rear power window switch LH or RH.
When the back door is open, BCM terminal 43 receives a ground signal

from terminal 7 of the back door latch (door ajar switch)

through back door latch terminal 8

through body grounds B7 and B19.
When the glass hatch is open, BCM terminal 42 receives a ground signal

from terminal + of the glass hatch ajar switch

through glass hatch ajar switch case ground.
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

BL-78
VEHICLE SECURITY (THEFT WARNING) SYSTEM
Revision: October 20052005 QX56

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 DescriptionEIS008QN
Refer to LAN-5, "CAN COMMUNICATION" .

BL-86
VEHICLE SECURITY (THEFT WARNING) SYSTEM
Revision: October 20052005 QX56
Terminals and Reference Value for IPDM E/REIS008QR
1*: when horn reminder is ON.
2*: L/W is for USA.
3*: Y is for Canada.
CONSULT-II Function (BCM)EIS008QS
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II INSPECTION 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.
Terminal Wire
ColorItem ConditionVoltage (V)
(Approx.)
38 B Ground — —
39 L CAN-H — —
40 P CAN-L — —
41 Y/B Hood switchHood closed OFF 0
Hood open ON Battery voltage
45 G/W Horn relayWhen doors locks are operated
using keyfob (OFF → ON) *1Battery voltage → 0V
52 L Headlamp low (LH)Lighting switch 2ND
positionOFF 0
ON Battery voltage
54 R/Y Headlamp low (RH)Lighting switch 2ND
positionOFF 0
ON Battery voltage
55 G Headlamp high (LH)Lighting switch HIGH
or PASS positionOFF 0
ON Battery voltage
56L/W *2
Y *3Headlamp high (RH)Lighting switch HIGH
or PASS positionOFF 0
ON Battery voltage
59 B Ground — 0
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.

BL-88
VEHICLE SECURITY (THEFT WARNING) SYSTEM
Revision: October 20052005 QX56
CONSULT-II APPLICATION ITEM
Data Monitor
Active Test
Work Support
Monitored Item Description
DOOR SW-AS Indicates [ON/OFF] condition of front door switch RH.
DOOR SW-RR Indicates [ON/OFF] condition of rear door switch RH.
DOOR SW-RL Indicates [ON/OFF] condition of rear door switch LH.
DOOR SW-DR Indicates [ON/OFF] condition of front door switch LH.
BACK DOOR SW Indicates [ON/OFF] condition of back door latch.
TRNK OPN MNTR Indicates [ON/OFF] condition of glass hatch ajar switch.
ACC ON SW Indicates [ON/OFF] condition of ignition switch in ACC position.
IGN ON SW Indicates [ON/OFF] condition of ignition switch in ON position.
KEYLESS UNLOCK Indicates [ON/OFF] condition of unlock signal from keyfob.
KEYLESS LOCK Indicates [ON/OFF] condition of lock signal from keyfob.
KEY CYL LK-SW Indicates [ON/OFF] condition of lock signal from door key cylinder switch.
KEY CYL UN-SW Indicates [ON/OFF] condition of unlock signal from door key cylinder switch.
KEYLESS PBD Indicates [ON/OFF] condition of unlock signal from door key cylinder switch.
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.
HOOD SW Indicates [ON/OFF] condition of hood switch.
Test Item Description
THEFT INDThis test is able to check security indicator lamp operation. The lamp will be turned on when “ON”
on CONSULT-II screen is touched.
HEADLAMP (HI)This test is able to check vehicle security lamp operation. The high beam headlamps will be acti-
vated for 0.5 seconds after “ON” on CONSULT-II screen is touched.
VEHICLE SECURITY HORNThis test is able to check vehicle security horn operation. The horns will be activated for 0.5 sec-
onds after “ON” on CONSULT-II screen is touched.
Test Item Description
SECURITY ALARM SET This mode can confirm and change security alarm ON-OFF setting.
THEFT ALM TRGThe switch which triggered vehicle security alarm is recorded. This mode is able to confirm and
erase the record of vehicle security alarm. The trigger data can be erased by touching “CLEAR”
on CONSULT-II screen.

VEHICLE SECURITY (THEFT WARNING) SYSTEM
BL-91
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: October 20052005 QX56
Symptom ChartEIS008QV
*1: Make sure the system is in the armed phase.SYMPTOM PROCEDURE Diagnostic procedure
1Vehicle security
system cannot be
set by ····Door switch Refer to BL-92, "
Door Switch Check" .
Lock/unlock switch Refer to BL-98, "
Door Lock/Unlock Switch Check" .
Door outside keyRefer to BL-96, "
Front Door Lock Assembly LH (Key Cylinder Switch)
Check" .
BCMIf the above systems are “OK”, replace BCM. Refer to BCS-20, "
Removal
and Installation of BCM" .
2Security indicator
does not turn
“ON”.Combination meter Refer to BL-95, "
Combination Meter (Security Indicator Lamp) Check" .
BCMIf the above systems are “OK”, replace BCM. Refer to BCS-20, "
Removal
and Installation of BCM" .
3*1 Vehicle secu-
rity system does
not alarm when
····Any door, hood or glass hatch
is opened.Refer to BL-92, "
Door Switch Check" .
Refer to BL-94, "
Hood Switch Check" .
If the above systems are “OK”, replace BCM. Refer to BCS-20, "
Removal
and Installation of BCM" .
4Vehicle security
alarm does not
activate.Horn alarmRefer to BL-98, "
Vehicle Security Horn Alarm Check" .
If the above systems are “OK”, check horn system.
Refer to WW-58, "
HORN" .
Headlamp alarmRefer to BL-98, "
Vehicle Security Headlamp Alarm Check" .
If the above systems are “OK”, replace BCM. Refer to BCS-20, "
Removal
and Installation of BCM" .
5Vehicle security
system cannot be
canceled by ····Door outside keyRefer to BL-96, "
Front Door Lock Assembly LH (Key Cylinder Switch)
Check" .
If the above systems are “OK”, check main power window and door lock/
unlock switch.
KeyfobCheck remote keyless entry function. Refer toBL-65, "
Keyfob Battery and
Function Check" .
If the above systems are “OK”, replace BCM. Refer to BCS-20, "
Removal
and Installation of BCM" .

AUTOMATIC BACK DOOR SYSTEM
BL-113
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: October 20052005 QX56
Trouble Diagnosis ProcedureEIS008R9
1. Check the trouble symptom and customer's requests.
2. Understand outline of system. Refer to BL-45, "
System Description" .
3. Confirm system operation.
4. Perform self-diagnosis procedures. Refer to BL-113, "
Self-Diagnosis Procedures" .
5. Refer to diagnosis chart by symptom, repair or replace any malfunctioning parts. Refer to BL-114, "
Diag-
nosis Chart" .
6. Inspection End.
Self-Diagnosis ProceduresEIS008RA
INPUT SIGNAL CHECK MODE
Input signal check mode allows testing of switch input signal to the back door control unit.
To activate input signal check mode on the automatic back door, perform the following steps:
1. Turn ignition switch OFF.
2. Turn back door close switch to CANCEL (system cancelled).
3. Place A/T selector lever in P position.
4. Using the inside emergency release lever, open the back door.
5. Have an assistant press and hold the back door handle switch.
6. While the assistant continues to hold the back door handle switch, turn ignition switch ON (DO NOT start
engine).
7. After approximately 5 seconds, the back door warning chime will sound for 0.5 seconds.
8. Release the back door handle switch.
9. Within 8 seconds of the back door warning chime sounding, press and hold the power liftgate switch.
10. After approximately 5 seconds, the back door warning chime will sound for 1 second.
11. Release the power liftgate switch.
12. The input signal check mode is now initialized.
The input signal check mode can test the following inputs. The back door warning chime will sound for approx-
imately 0.5 seconds each time a switch signal input occurs. Use this test when one of these inputs is not
responding during normal automatic back door operation.
*Back door warning chime should sound as soon as vehicle moves.
Turn ignition switch OFF to end input signal check mode.
OPERATING CHECK MODE
Operating check mode allows self-diagnosis of the automatic back door system.
To activate operating check mode on the automatic back door, perform the following steps:
1. Turn ignition switch OFF.
2. Turn back door close switch to CANCEL (system cancelled).
3. Place A/T selector lever in P position.
Switch signal Operation Refer to
Power liftgate switch OFF → ONBL-116
Back door close switch (CLOSE) OFF → ONBL-118
Back door close switch (CANCEL) OFF → ONBL-119
Back door handle switch OFF → ONBL-125
Glass switch OFF → ONBL-117
A/T device (park switch) P position → other than P positionAT-6 0
Vehicle speed* Vehicle speed —
Remote keyless entry signal Keyfob switch OFF → ONBL-44
Door lock/unlock signal LOCK → UNLOCKBL-16
Pinch strip LH signal OFF → ONBL-121
Pinch strip RH signal OFF → ONBL-121

AUTOMATIC BACK DOOR SYSTEM
BL-115
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: October 20052005 QX56
Back Door Power Supply and Ground Circuit InspectionEIS008RC
1. BACK DOOR POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect back door control unit.
3. Check voltage between back door control unit connector B55
terminals 3, 10 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. BACK DOOR GROUND CIRCUIT INSPECTION
Check continuity between back door control unit connector B55 ter-
minal 1, 2 and ground.
OK or NG
OK >> Circuit is OK.
NG >> Repair or replace harness.
During auto closing operations, if obstruction is detected, the
door does not operate in reverse.Back door motor assembly —
During close or cinch operations, the door does not operate in
reverse if the back door handle is operated.Handle switch systemBL-125
When the keyfob is operated, the back door does not operate
automatically.Remote keyless entry system inspectionBL-44Power window serial linkBL-112
Pinch strip system inspectionBL-121
Auto closure does not operate.Half-latch switch systemBL-122Cinch latch motor systemBL-126
Handle switch systemBL-125
The back door does not open.
(Closure motor rotation is not reversed.)Open switch systemBL-123
Handle switch systemBL-125
Warning chime does not sound. Back door warning chime systemBL-122
Auto closure operation works, but the back door is not fully
closedClose switch systemBL-124Handle switch systemBL-125
Cinch latch motor systemBL-126
Back door latch assembly mechanism dam-
aged or worn.— Symptom Suspect systems Refer to
3 - Ground : Approx. battery voltage
10 - Ground : Approx. battery voltage
WIIA0567E
1 - Ground : Continuity should exist.
2 - Ground : Continuity should exist.
LIIA0801E

LAN-6
[CAN]
CAN COMMUNICATION
Revision: October 20052005 QX56
Input/output signal chart
T: Transmit R: Receive
Signals ECM TCMDriver
seat
con-
trol
unitCom-
bina-
tion
meterDis-
play
con-
trol
unitBCMStee r-
ing
angle
sensorFront
air
control ABS
actua-
tor and
elec-
tric unit
(con-
trol
unit)IPDM
E/R
Engine speed signal T R R R R
Engine status signal T R R
Engine coolant temperature signal T R R R
A/T self-diagnosis signal R T
Accelerator pedal position signal T R R
Closed throttle position signal T R
Wide open throttle position signal T R
Battery voltage signal T R
Key switch signal R T
Ignition switch signal R T R
P range signal T R
Stop lamp switch signal R T
Parking brake switch signal T R
Fuel consumption monitor signalTR
TR
Turbine revolution signal R T
Output shaft revolution signal R T
A/C switch signal R T
A/C compressor request signal T R R
Blower fan motor switch signal R T R
A/C switch/indicator signalTR
RT
Cooling fan speed request signal T R R
Position light request signal R T R
Low beam request signal T R
Low beam status signal RT
High beam request signal R T R
High beam status signal RT
Front fog light request signal T R
Day time running light request signal T R
Vehicle speed signalRRT
RRRTRR R
Sleep wake up signal R T R
Door switch signal R R R T R
Turn indicator signal R T
Key fob ID signal R T
Key fob door unlock signal R T
Buzzer output signal R T