door lock INFINITI QX56 2004 Factory Workshop Manual

POWER DOOR LOCK SYSTEM
BL-37
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Revision: August 20072004 QX56
2. CHECK HARNESS CONTINUITY
1. Disconnect BCM.
2. Check continuity between BCM connector (A) M18 terminal 30
and glass hatch switch connector (B) D710 terminal 2.
3. Check continuity between BCM connector M18 terminal 30 and
ground.
OK or NG
OK >> Glass hatch switch circuit is OK.
NG >> Repair or replace harness.
Front Door Lock Assembly LH (Actuator) CheckEIS002RK
1. CHECK DOOR LOCK ACTUATOR HARNESS
1. Turn ignition switch OFF.
2. Disconnect BCM and front door lock assembly LH (actuator).
3. Check continuity between BCM connector M20 terminals 59, 65
and front door lock assembly LH (actuator) connector D14 termi-
nals 2, 3.
4. Check continuity between BCM connector M20 terminals 59, 65
and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. CHECK DOOR LOCK ACTUATOR SIGNAL
1. Reconnect BCM.
2. Check voltage between BCM connector M20 terminals 59, 65
and ground.30 (Y/BR) - 2 (Y/BR) : Continuity should exist.
30 (Y/BR) - Ground : Continuity should not exist.
WIIA0754E
ConnectorTe r m i n a l s
(Wire color)ConnectorTe r m i n a l s
(wire color)Continuity
M2059 (G)
D142 (G) Yes
65 (V) 3 (V) Yes
Connector Terminals (Wire color) Continuity
M2059 (G)
GroundNo
65 (V) No
LIIA1574E
ConnectorTe r m i n a l s
(Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
M2059 (G)
GroundDriver door lock/unlock
switch is turned to
UNLOCK0 → Battery voltage
for 300 ms
65 (V)Driver door lock/unlock
switch is turned to LOCK0 → Battery voltage
for 300 ms
LIIA1046E

BL-38
POWER DOOR LOCK SYSTEM
Revision: August 20072004 QX56
OK or NG
OK >> Replace front door lock assembly LH (actuator). Refer to BL-132, "FRONT DOOR LOCK" .
NG >> Replace BCM. Refer to BCS-19, "
Removal and Installation of BCM" .

POWER DOOR LOCK SYSTEM
BL-39
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Revision: August 20072004 QX56
Front Door Lock Actuator RH CheckEIS002RL
1. CHECK FRONT DOOR LOCK ACTUATOR RH HARNESS
1. Turn ignition switch OFF.
2. Disconnect BCM and front door lock actuator RH.
3. Check continuity between BCM connector M20 terminals 65, 66
and front door lock actuator RH D114 terminals 2, 3.
4. Check continuity between BCM connector M20 terminals 65, 66
and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. CHECK FRONT DOOR LOCK ACTUATOR RH SIGNAL
1. Reconnect BCM.
2. Check voltage between BCM connector M20 terminals 65, 66
and ground.
OK or NG
OK >> Replace front door lock actuator RH. Refer to BL-132, "FRONT DOOR LOCK" .
NG >> Replace BCM. Refer to BCS-19, "
Removal and Installation of BCM" .
Terminal Continuity
65 (V) 3 (V) Yes
66 (G/Y) 2 (G/Y) Yes
Terminals (Wire color) Continuity
65 (V)
GroundNo
66 (G/Y) No
LIIA1479E
ConnectorTe r m i n a l s
(Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
M2065 (V)
GroundDoor lock/unlock switch is
turned to LOCK0 → Battery voltage
for 300 ms
66 (G/Y)Door lock/unlock switch is
turned to UNLOCK0 → Battery voltage
for 300 ms
LIIA1048E

BL-40
POWER DOOR LOCK SYSTEM
Revision: August 20072004 QX56
Rear Door Lock Actuator RH/LH CheckEIS002RM
1. CHECK REAR DOOR LOCK ACTUATOR LH OR RH HARNESS
1. Turn ignition switch OFF.
2. Disconnect BCM and each door lock actuator.
3. Check continuity between BCM connector M20 terminals 65, 66
and rear door lock actuator RH/LH connectors terminals 2, 3.
4. Check continuity between BCM connector M20 terminals 65, 66
and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. CHECK DOOR LOCK ACTUATOR SIGNAL
1. Reconnect BCM.
2. Check voltage between BCM connector M20 terminals 65, 66
and ground.
OK or NG
OK >> Replace door lock actuator. Refer to BL-135, "REAR DOOR LOCK" .
NG >> Replace BCM. Refer to BCS-19, "
Removal and Installation of BCM" .
Terminal Continuity
65 (V) 3 (V) Yes
66 (G/Y) 2 (G/Y) Yes
Terminals (Wire color) Continuity
65 (V)
GroundNo
66 (G/Y) No
LIIA1480E
ConnectorTe r m i n a l s
(Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
M2065 (V)
GroundDoor lock/unlock switch
is turned to LOCK0 → Battery voltage
for 300 ms
66 (G/Y)Door lock/unlock switch
is turned to UNLOCK0 → Battery voltage
for 300 ms
LIIA1048E

POWER DOOR LOCK SYSTEM
BL-41
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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

BL-42
POWER DOOR LOCK SYSTEM
Revision: August 20072004 QX56
Front Door Lock Assembly LH (Key Cylinder Switch) CheckEIS002RN
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
(Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
D74 (L)
GroundNeutral/Unlock 5
Lock 0
6 (R)Neutral/Lock 5
Unlock 0
LIIA0566E
Connector Terminal (wire color) Continuity
D14 5 (B) – Ground Yes
WIIA0755E

POWER DOOR LOCK SYSTEM
BL-43
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Revision: August 20072004 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-132, "
Removal and Instal-
lation" .
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
ConnectorTe r m i n a l s
(wire color)ConnectorTe r m i n a l s
(wire color)Continuity
A: Main
power win-
dow and
door lock/
unlock
switch4 (L) B: Front
door lock
assembly
LH (key
cylinder
switch)1 (L) Yes
6 (R) 6 R) Yes
4 (L),
6 (R)Ground No
WIIA0756E

REMOTE KEYLESS ENTRY SYSTEM
BL-45
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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
BL-47
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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 — — —