2005 INFINITI QX4 keyless

REMOTE KEYLESS ENTRY SYSTEM
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Revision: October 20052005 QX56
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

BL-62
REMOTE KEYLESS ENTRY SYSTEM
Revision: October 20052005 QX56
Key Switch (Insert) CheckEIS008Q9
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.
2. CHECK KEY SWITCH (INSERT)
1. Turn ignition switch OFF.
2. Disconnect key switch and key lock solenoid connector.
3. Check continuity between key switch and key lock solenoid terminals 3, 4.
OK or NG
OK >> Repair or replace harness.
NG >> Replace key switch.KEY ON SW : ON
KEY ON SW : OFF
LIIA0169E
ConnectorTe r m i n a l s
Condition Voltage (V)
(+) (–)
M18 37 GroundKey is inserted. Battery voltage
Key is removed. 0
LIIA0567E
Terminals Condition Continuity
3 – 4Key is inserted. Yes
Key is removed. No
LIIA1044E

REMOTE KEYLESS ENTRY SYSTEM
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Revision: October 20052005 QX56
Door Switch CheckEIS008QA
1. CHECK DOOR SWITCHES INPUT SIGNAL
With CONSULT-II
Check door switches ("DOOR SW-DR", "DOOR SW-AS", "DOOR SW-RL", "DOOR SW-RR", "BACK DOOR
SW") in DATA MONITOR mode with CONSULT–II.Refer to BL-27, "
DATA MONITOR" .

When doors are open:

When doors are closed:
Without CONSULT-II
Check voltage between BCM connector M18 or M19 terminals 12,
13, 43, 47, 48 and ground.
OK or NG
OK >> Door switch circuit is OK.
NG >> GO TO 2.DOOR SW-DR : ON
DOOR SW-AS : ON
DOOR SW-RL : ON
DOOR SW-RR : ON
BACK DOOR SW : ON
DOOR SW-DR : OFF
DOOR SW-AS : OFF
DOOR SW-RL : OFF
DOOR SW-RR : OFF
BACK DOOR SW : OFF
LIIA0665E
Connector ItemTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
M19Back door
latch (door
ajar switch)43
GroundOpen
↓
Closed0
↓
Battery voltage Front door
switch LH47
Rear door
switch LH48
M18Front door
switch RH12
Rear door
switch RH13
LIIA1041E

BL-64
REMOTE KEYLESS ENTRY SYSTEM
Revision: October 20052005 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 - 12 : Continuity should exist.
2 - 13 : Continuity should exist.
2 - 47 : Continuity should exist.
2 - 48 : Continuity should exist.
7 - 43 : Continuity should exist.
2 - Ground : Continuity should not exist.
7 - 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

REMOTE KEYLESS ENTRY SYSTEM
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Revision: October 20052005 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.
Keyfob Battery and Function CheckEIS008QB
1. CHECK KEYFOB BATTERY
Remove battery and measure voltage across battery positive and negative terminals, (+) and (−).
NOTE:
Keyfob does not function if battery is not set correctly.
OK or NG
OK >> GO TO 2.
NG >> Replace battery.8 - Ground : Continuity should exist.
LIIA0828E
Voltage : 2.5V - 3.0V
SEL237W

BL-66
REMOTE KEYLESS ENTRY SYSTEM
Revision: October 20052005 QX56
2. CHECK KEYFOB FUNCTION
With CONSULT-II
Check keyfob function in “DATA MONITOR” mode with CONSULT-II.
When pushing each button of keyfob, the corresponding monitor item should
be turned as follows.
Without CONSULT-II
Check keyfob function using Remote Keyless Entry Tester J-43241.
OK or NG
OK >> WITH CONSULT-II: Keyfob, remote keyless entry receiver and wiring harness between BCM and
remote keyless entry receiver are OK. Replace BCM. Refer to BCS-20, "
Removal and Installation
of BCM" .
OK >> WITHOUT CONSULT-II: Keyfob is OK. Further inspection is necessary. Refer to BL-60, "
SYMP-
TOM CHART" .
NG >> WITH CONSULT-II: Further inspection is necessary. Refer to BL-60, "
SYMPTOM CHART" .
NG >> WITHOUT CONSULT-II: Replace keyfob. Refer to BL-71, "
ID Code Entry Procedure" .
Remote Keyless Entry Receiver System CheckEIS008QC
1. REMOTE KEYLESS ENTRY RECEIVER SIGNAL
Check signal voltage waveform between BCM connector M18 termi-
nal 20 and ground using an oscilloscope.
OK or NG
OK >> Remote keyless entry receiver signal power supply, ground and signal circuits are OK. Replace
BCM. Refer to BCS-20, "
Removal and Installation of BCM" .
NG >> GO TO 2.Condition Monitor item
Pushing LOCK KEYLESS LOCK : ON
Pushing UNLOCK KEYLESS UNLOCK : ON
Keep pushing UNLOCKRKE KEEP UNLK
turns to ON 3 seconds
after UNLOCK button
is pushed.
Pushing PANIC KEYLESS PANIC : ON
Pushing LOCK and UNLOCK
at the same timeRKE LCK-UNLCK : ON
Pushing Power Back Door KEYLESS PBD : ON
LIIA1487E
Condition:
Keyfob buttons released : Refer to BL-53, "
Te r m i -
nals and Reference Value
for BCM" .
Keyfob buttons pressed : Refer to BL-53, "
Te r m i -
nals and Reference Value
for BCM" .LIIA1275E

REMOTE KEYLESS ENTRY SYSTEM
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Revision: October 20052005 QX56
2. REMOTE KEYLESS ENTRY RECEIVER POWER SUPPLY INSPECTION
Check signal voltage waveform between BCM connector M18 termi-
nal 19 and ground using an oscilloscope.
OK or NG
OK >> GO TO 3.
NG >> Replace BCM. Refer to BCS-20, "
Removal and Installa-
tion of BCM" .
3. REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT INSPECTION (BCM)
Check continuity between BCM connector M18 terminal 18 and
ground.
OK or NG
OK >> GO TO 4.
NG >> Replace BCM. Refer to BCS-20, "
Removal and Installa-
tion of BCM" .
4. HARNESS INSPECTION BETWEEN BCM AND REMOTE KEYLESS ENTRY RECEIVER
1. Disconnect remote keyless entry receiver and BCM connectors.
2. Check continuity between remote keyless entry receiver con-
nector M120 terminals 1, 2, 4 and BCM connector M18 termi-
nals 18, 19, 20.
3. Check continuity between remote keyless entry receiver termi-
nals 1, 2 and 4 and ground.
OK or NG
OK >> Replace remote keyless entry receiver.
NG >> Repair or replace harness.19 - Ground : Refer to BL-53, "
Te r m i -
nals and Reference Value
for BCM" .
WIIA0433E
18 - Ground : Continuity should exist.
WIIA0434E
1 - 18 : Continuity should exist.
2 - 20 : Continuity should exist.
4 - 19 : Continuity should exist.
1 - Ground : Continuity should not exist.
2 - Ground : Continuity should not exist.
4 - Ground : Continuity should not exist.
WIIA0308E

BL-68
REMOTE KEYLESS ENTRY SYSTEM
Revision: October 20052005 QX56
ACC Power CheckEIS008QD
1. CHECK ACC POWER
With CONSULT-II
Check "ACC ON SW" in DATA MONITOR mode with CONSULT–II. Refer to BL-27, "
DATA MONITOR" .
Without CONSULT-II
Check voltage between BCM connector M18 terminal 11 and
ground.
OK or NG
OK >> ACC power circuit is OK.
NG >> Check the following:

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

Harness for open or short.
IPDM E/R Operation CheckEIS008QE
1. CHECK IPDM E/R INPUT VOLTAGE
Check voltage between IPDM E/R connector E122 terminal 45 and
ground.
OK or NG
OK >> Replace IPDM E/R.
NG >> GO TO 2.
Monitor Item Condition
ACC ON SWIgnition switch position ACC : ON
Ignition switch position OFF : OFF
PIIA3367E
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
M18 11 GroundACC Battery voltage
OFF 0
PIIA7002E
ConnectorTe r m i n a l s
Voltage (V)
(Approx.)
(+) (–)
E122 45 Ground Battery voltage
LIIA1053E