2004 INFINITI QX56 Back up

BL-32
POWER DOOR LOCK SYSTEM
Revision: August 20072004 QX56
2. CHECK DOOR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door switch and BCM.
3. Check continuity between door switch connector (B) B8 (front LH), B108 (front RH), B18 (rear LH), B116
(rear RH) terminal 2 or back door latch connector (C) D503 terminal 7 and BCM connectors (A) M18, M19
terminals 12, 13, 43, 47 and 48.
4. Check continuity between door switch connector (B) B8 (front
LH), B108 (front RH), B18 (rear LH), B116 (rear RH) terminal 2
or back door latch connector (C) D503 terminal 7 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK DOOR SWITCHES
FRONT AND REAR DOORS
Check continuity between front or rear door switch terminal 2 and
exposed metal of switch while pressing and releasing switch.
BACK DOOR
Check continuity between back door latch connector (A) D503 termi-
nals 7 and 8 while pressing (closing back door) and releasing (open-
ing back door) switch.
OK or NG
OK >> (Front and rear doors) Switch circuit is OK.
OK >> (Back door) GO TO 4.
NG >> Replace door switch.2 (R/L) - 12 (R/L) : Continuity should exist.
2 (GR) - 13 (GR) : Continuity should exist.
2 (SB) - 47 (SB) : Continuity should exist.
2 (R/Y) - 48 (R/Y) : Continuity should exist.
7 (R/W) - 43 (R/B) : Continuity should exist.
2 (SB, R/L, R/Y or GR) - Ground : Continuity should not
exist.
7 (R/W) - Ground : Continuity should not
exist.
WIIA0750E
Door switch is released : Continuity should exist.
Door switch is pushed : Continuity should not exist.
WIIA0644E
When back door is open : Continuity should exist.
When back door is closed : Continuity should not exist.
WIIA0752E

POWER DOOR LOCK SYSTEM
BL-33
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Revision: August 20072004 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) CheckEIS0 02 RI
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 (B) - Ground : Continuity should exist.
LIIA0828E
KEY ON SW :ON
KEY ON SW :OFF
LIIA0169E
ConnectorTerminal (Wire color)
Condition Voltage (V)
(+) (–)
M18 37 (B/R) GroundKey is inserted. Battery voltage
Key is removed. 0
LIIA0567E

POWER DOOR LOCK SYSTEM
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Revision: August 20072004 QX56
Glass Hatch Lock Actuator CheckEIS005X6
1. CHECK GLASS HATCH LOCK ACTUATOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect glass hatch lock actuator.
3. Check continuity between glass hatch lock actuator connector
D711 terminal 1 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness. Refer to BL-136, "
BACK
DOOR LOCK" .
2. CHECK GLASS HATCH LOCK ACTUATOR HARNESS
1. Disconnect BCM.
2. Check continuity between BCM connector M19 terminal 53 and
glass hatch lock actuator connector D711 terminal 3.
3. Check continuity between BCM connector M19 terminals 53 and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK GLASS HATCH LOCK ACTUATOR SIGNAL
1. Reconnect BCM.
2. Check voltage between BCM connector M19 terminal 53 and
ground.
OK or NG
OK >> Replace glass hatch lock actuator.
NG >> Replace BCM. Refer to BCS-19, "
Removal and Installa-
tion of BCM" .
Terminal (Wire color) Continuity
1 (B) Ground Yes
LIIA1940E
Terminals (wire color) Continuity
53 (L/W) 3 (L/W) Yes
Terminals (Wire color) Continuity
53 (L/W) Ground No
LIIA1939E
ConnectorTe r m i n a l s
(Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
M19 53 (L/W) GroundGlass hatch switch is
depressed0 → Battery voltage
for 300 ms
LIIA1938E

REMOTE KEYLESS ENTRY SYSTEM
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Revision: August 20072004 QX56
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-46
REMOTE KEYLESS ENTRY SYSTEM
Revision: August 20072004 QX56

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 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.
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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Revision: August 20072004 QX56

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 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-101, "
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.
C mode S mode
Keyfob operation Lock Unlock Lock Unlock
Hazard warning lamp
flashTwic e O nc e Twic e —
Horn sound Once — — —

REMOTE KEYLESS ENTRY SYSTEM
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Revision: August 20072004 QX56
Terminals and Reference Value for BCMEIS002RT
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 W CAN-H — —
40 R CAN-L — —
42 GR Glass hatch ajar switchGlass hatch open (ON) → Glass hatch
close (OFF) 0 → Battery voltage
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)
*10 → Battery voltage
61 G/Y Turn signal RHWhen doors are locked or unlocked
using keyfob (OFF → ON)
*10 → Battery voltage
LIIA1893E
LIIA1894E
LIIA1895E

BL-54
REMOTE KEYLESS ENTRY SYSTEM
Revision: August 20072004 QX56

*1: when hazard reminder is ON.

*2: when room lamp switch is in "DOOR" position.
Terminals and Reference Value for IPDM E/REIS002RU
*: when horn reminder is ON.62 R/W Step lamp LH and RHStep lamp ON 0
Step lamp OFF Battery voltage
63 L Room lampRoom lamp ON
*2Battery voltage
Room Lamp OFF
*20
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 W CAN-H — —
40 R CAN-L — —
45 G/W Horn relayWhen doors locks are operated
using keyfob (OFF → ON) *Battery voltage → 0
59 B Ground — 0