2005 INFINITI QX4 lock

BL-42
POWER DOOR LOCK SYSTEM
Revision: October 20052005 QX56
Front Door Lock Assembly LH (Key Cylinder Switch) CheckEIS008PV
1. CHECK DOOR KEY CYLINDER SWITCH LH
With CONSULT-II
Check front door lock assembly LH (key cylinder switch) ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in
DATA MONITOR mode with CONSULT–II. Refer to BL-27, "
DATA MONITOR" .

When key inserted in front key cylinder is turned to LOCK:

When key inserted in front key cylinder is turned to UNLOCK:
Without CONSULT-II
Check voltage between main power window and door lock/unlock
switch connector D7 terminals 4, 6 and ground.
OK or NG
OK >> Front door lock assembly LH (key cylinder switch) signal is OK.
NG >> GO TO 2.
2. CHECK DOOR KEY CYLINDER SWITCH LH GROUND HARNESS
Check continuity between front door lock assembly LH (key cylinder
switch) connector (A) D14 terminal 5 and body ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.KEY CYL LK-SW : ON
KEY CYL UN-SW : ON
LIIA0188E
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
D74
GroundNeutral/Unlock 5
Lock 0
6Neutral/Lock 5
Unlock 0
LIIA0566E
Connector Terminals Continuity
D14 5 – Ground Yes
WIIA0755E

POWER DOOR LOCK SYSTEM
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Revision: October 20052005 QX56
3. CHECK DOOR KEY CYLINDER SWITCH LH
Check continuity between front door lock assembly LH (key cylinder
switch) terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace front door lock assembly LH (key cylinder switch). Refer to BL-131, "
FRONT DOOR
LOCK" .
4. CHECK DOOR KEY CYLINDER HARNESS
Check continuity between main power window and door lock/unlock
switch connector (A) D7 terminals 4, 6 and front door lock assembly
LH (key cylinder switch) connector (B) D14 terminals 1, 6 and body
ground.
OK or NG
OK >> Replace main power window and door lock/unlock switch.
NG >> Repair or replace harness.
Terminals Condition Continuity
1 – 5 Key is turned to UNLOCK or neutral. No
Key is turned to LOCK. Yes
5 – 6Key is turned to LOCK or neutral. No
Key is turned to UNLOCK. Yes
LIIA1573E
Connector Terminals ConnectorTe r m i n a l s
(wire color)Continuity
A: Main
power win-
dow and
door lock/
unlock
switch4 B: Front
door lock
assembly
LH (key
cylinder
switch)1Yes
66Yes
4, 6 Ground No
WIIA0756E

REMOTE KEYLESS ENTRY SYSTEM
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Revision: October 20052005 QX56
System DescriptionEIS008PX
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 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

BL-46
REMOTE KEYLESS ENTRY SYSTEM
Revision: October 20052005 QX56
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 oper-
ation. (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
Operation Description

When a button on the keyfob is operated, the signal is sent from the keyfob and received by the remote
keyless 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 oper-
ated 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
keyless 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.
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)

REMOTE KEYLESS ENTRY SYSTEM
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The back door control unit operates the back door motor to open the back door. (At this time, speed con-
trol, 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
keyless 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 con-
trol.)

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-99, "
AUTOMATIC BACK DOOR
SYSTEM" .
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.

The received signal is sent to the BCM and compared with the registered ID number.

If the ID number matches, the BCM sends the turn signal flashing and horn signal to the IPDM E/R.

The IPDM E/R flashes the turn signal lamps and sounds the horn for each keyfob operation.
Operating function of hazard and horn reminder
Hazard and Horn Reminder
BCM output to IPDM E/R for horn reminder signal as DATA LINE (CAN-H and CAN-L).
The hazard and horn reminder has C mode (horn chirp mode) and S mode (non-horn chirp mode).
How to change hazard and horn reminder mode
With CONSULT-II
Hazard and horn reminder can be changed using “WORK SUPPORT” mode in “MULTI ANSWER BACK SET".
Without CONSULT-II
Refer to Owner's Manual for instructions.
Interior Lamp Operation
When the following input signals are both supplied:

all door switches are in the OFF position. (when all the doors are closed);

interior lamp switch is in DOOR position.
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-131, "
ROOM LAMP TIMER OPERATION" .
C mode S mode
Keyfob operation Lock Unlock Lock Unlock
Hazard warning lamp
flashTwic e O nc e Twic e —
Horn sound Once — — —

BL-48
REMOTE KEYLESS ENTRY SYSTEM
Revision: October 20052005 QX56
Panic Alarm Operation
When key switch is OFF (when 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 contin-
uously for more than 1 second, 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 DescriptionEIS008PY
Refer to LAN-5, "CAN COMMUNICATION" .

REMOTE KEYLESS ENTRY SYSTEM
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Revision: October 20052005 QX56
Terminals and Reference Value for BCMEIS0 08 Q1
Te r m i n a l Wire
ColorItem ConditionVoltage (V)
(Approx.)
11 O Ignition switch (ACC or ON) Ignition switch (ACC or ON position) Battery voltage
12 R/L Front door switch RH Door open (ON) → Door close (OFF) Battery voltage → 0
13 GR Rear door switch RH Door open (ON) → Door close (OFF) Battery voltage → 0
18 PRemote keyless entry
receiver ground—0
19 V/WRemote keyless entry
receiver (Power supply)Ignition switch OFF
20 G/WRemote keyless entry
receiver signal (Signal)Stand-by (keyfob buttons released)
When remote keyless entry receiver
receives signal from keyfob (keyfob
buttons pressed)
37 B/RKey switch and key lock sole-
noid (insert)Key inserted in IGN key cylinder (ON)
→ Key removed from IGN key cylinder
(OFF)Battery voltage → 0
38 W/LIgnition switch (ON or
START)Ignition switch (ON or START posi-
tion)Battery voltage
39 L CAN-H — —
40 P CAN-L — —
43 R/BBack 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
56 R/GBattery saver
(Interior lamp)Battery saver does operated → Does
not operated (ON → OFF)Battery voltage → 0
57 Y/R Battery power supply — Battery voltage
59 GFront door lock assembly LH
(actuator) (unlock)Door lock & unlock switch
(Neutral → Unlock)0 → Battery voltage
60 G/B Turn signal LHWhen doors are locked or unlocked
using keyfob (OFF → ON) *20 → Battery voltage
61 G/Y Turn signal RHWhen doors are locked or unlocked
using keyfob (OFF → ON) *20 → Battery voltage
62 R/W Step lamp LH and RHStep la mp ON 0
Step lamp OFF Battery voltage
LIIA1893E
LIIA1894E
LIIA1895E

BL-54
REMOTE KEYLESS ENTRY SYSTEM
Revision: October 20052005 QX56

*1: when room lamp switch is in "DOOR" position.

*2: when hazard reminder is ON.
Terminals and Reference Value for IPDM E/REIS008Q2
*: when horn reminder is ON.63 L Room lampRoom lamp ON *1 Battery voltage
Room Lamp OFF *1 0
65 V All door lock actuators (lock)Door lock & unlock switch
(Neutral → Lock)0 → Battery voltage
66 G/YFront door lock actuator RH,
rear door lock actuators LH/
RH and back door lock actu-
ator (unlock)Door lock & unlock switch
(Neutral → Unlock)0 → Battery voltage
67 B Ground — 0
69 W/RRear power window power
supply— Battery voltage
70 W/B Battery power supply — Battery voltage Terminal Wire
ColorItem ConditionVoltage (V)
(Approx.)
Terminal Wire
ColorItem ConditionVoltage (V)
(Approx.)
38 B Ground — 0
39 L CAN-H — —
40 P CAN-L — —
45 G/W Horn relayWhen doors locks are operated
using keyfob (OFF → ON) *Battery voltage → 0
59 B Ground — 0