lock INFINITI QX4 2005 Factory Service Manual

REMOTE KEYLESS ENTRY SYSTEM
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Revision: October 20052005 QX56

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 — — —

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REMOTE KEYLESS ENTRY SYSTEM
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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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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

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REMOTE KEYLESS ENTRY SYSTEM
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*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

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REMOTE KEYLESS ENTRY SYSTEM
Revision: October 20052005 QX56
5. Touch “BCM”.
If "BCM" is not indicated, refer to GI-39, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
6. Touch “MULTI REMOTE ENT”.
7. Select diagnosis mode.
“DATA MONITOR”, “ACTIVE TEST” and “WORK SUPPORT”
are available.
CONSULT-II Application ItemsEIS008Q5
“MULTI REMOTE ENT”
Data Monitor
BCIA0030E
LIIA0194E
BCIA0031E
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.
KEY ON SW Indicates [ON/OFF] condition of key 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 PANIC Indicates [ON/OFF] condition of panic signal from keyfob.
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 power back door signal from keyfob.

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: October 20052005 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

REMOTE KEYLESS ENTRY SYSTEM
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Trouble Diagnosis ProcedureEIS0 08 Q6
1. Check the symptom and customer's requests.
2. Understand outline of system. Refer to BL-45, "
System Description" .
3. Confirm system operation.

Check that the power door lock system operates normally. Refer to BL-16, "POWER DOOR LOCK
SYSTEM" .

Check that the automatic back door system operates normally. Refer to BL-99, "AUTOMATIC BACK
DOOR SYSTEM" .
4. Perform pre-diagnosis inspection. Refer to BL-59, "
BCM Power Supply and Ground Circuit Check" .
5. Refer to trouble diagnosis chart by symptom, repair or replace any malfunctioning parts. Refer to BL-60,
"Trouble Diagnoses" .
6. Inspection End.
BCM Power Supply and Ground Circuit CheckEIS0 08 Q7
1. CHECK FUSE AND FUSIBLE LINK
Check the following BCM fuses and fusible link.
NOTE:
Refer to BL-44, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse, refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM connectors M18, M20 terminals
11, 38, 57, 70 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
Component Parts Terminal No. (SIGNAL) Ampere No. Location
BCM57 (BAT power supply) 15A 22 Fuse block (J/B)
70 (BAT power supply) 50AfFuse and fusible link box
11 (ACC power supply) 10A 4 Fuse block (J/B)
38 (IGN power supply) 10A 59 Fuse and relay box
ConnectorTerminals
Signal nameIgnition
switchVo l ta g e
(+) (–)
M2070
GroundBattery power
supplyOFFBattery
voltage
57Battery power
supplyOFFBattery
voltage
M1811ACC power
supplyACCBattery
voltage
38IGN power
supplyONBattery
voltage
WIIA0600E

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REMOTE KEYLESS ENTRY SYSTEM
Revision: October 20052005 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 DiagnosesEIS008Q8
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
Continuity
(+) (-)
M20 67 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-20
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-20
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,
"Active
Te s t"
2. Door switch checkBL-63
3. Replace BCM.BCS-20

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-20
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-20
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)
NOTE:
If the result of keyfob function check is OK, keyfob is not malfunc-
tioning.BL-65
2. Key switch (insert) checkBL-62
3. Check that glass hatch is closed —
4. Remote keyless entry receiver systemBL-66
5. Replace BCM.BCS-20
Room lamp, ignition keyhole illumination and step
lamp operation do not activate properly.1. Room lamp operation checkBL-70
2. Ignition keyhole illumination operation checkBL-70
3.Step lamp operation checkLT- 1 3 0
4. Door switch checkBL-63
5. Replace BCM.BCS-20
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-20
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-20
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-20
Symptom Diagnoses/service procedureReference
page