key INFINITI FX35 2004 Service Manual

BL-176
BACK DOOR AUTO CLOSURE SYSTEM
Revision: 2004 November 2004 FX35/FX45
2. CHECK HARNESS 1
1. Disconnect Intelligent Key unit and back door closure control unit connector.
2. Check continuity between Intelligent Key unit connector M34 ter-
minal 23 and back door closure control unit connector D106 ter-
minal 6.
3. Check continuity between Intelligent Key unit connector M34 ter-
minal 23 and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace or repair malfunction harness.
3. CHECK HARNESS 2
1. Disconnect Intelligent Key unit and back door opener switch connector.
2. Check continuity between Intelligent Key unit connector M34 ter-
minal 24 and back door opener switch connector D112 terminal
1.
3. Check continuity between Intelligent Key unit connector M34 ter-
minal 24 and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace or repair malfunction harness.
4. CHECK BACK DOOR OPENER SWITCH GROUND CIRCUIT
Check continuity between back door opener switch connector D112
terminal 2 and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness.
5. CHECK BACK DOOR OPENER SWITCH
Check continuity between back door opener switch terminals 1 and
2.
OK or NG
OK >> GO TO 6.
NG >> Replace back door opener switch.23 (L/Y) – 6 (LG) : Continuity should exist.
23 (L/Y) - Ground : Continuity should not exist.
PIIB0216E
24 (P) – 1 (Y) : Continuity should exist.
24 (P) - Ground : Continuity should not exist.
PIIB0217E
2 (B) – Ground : Continuity should exist.
PIIA6180E
Terminals Condition Continuity
12Back door opener switch: ON Yes
Back door opener switch: OFF No
PIIA6181E

BACK DOOR AUTO CLOSURE SYSTEM
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Revision: 2004 November 2004 FX35/FX45
6. CHECK BACK DOOR CLOSURE CONTROL UNIT OUTPUT SIGNAL
1. Connect back door closure control unit connector.
2. Check voltage between back door closure control unit connector
D106 terminal 6 and ground.
OK or NG
OK >> Replace Intelligent Key unit.
NG >> Replace back door closure control unit.
Back Door Opener Switch Check (Without Intelligent Key)AIS004U9
1. CHECK BACK DOOR OPENER SWITCH SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between back door closure control unit connector and ground.
OK or NG
OK >> Back door opener switch is OK.
NG >> GO TO 2.
2. CHECK HARNESS CONTINUITY
1. Disconnect back door closure control unit and back door opener switch connector.
2. Check continuity between back door closure control unit con-
nector D106 terminal 6 and back door opener switch connector
D112 terminal 1.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between back door closure
control unit and back door opener switch. 6 (LG) – Ground : Approx. 5V
PIIA6178E
ConnectorTerminals (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
D106 6 (Y) GroundBack door opener switch
: ON0
Back door opener switch
: OFF5
PIIA6178E
6 (Y) – 1 (Y) : Continuity should exist.
PIIA6179E

BACK DOOR AUTO CLOSURE SYSTEM
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Unlock Sensor Check (Without Intelligent Key)AIS004UA
1. CHECK UNLOCK SENSOR SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between back door closure control unit connector
and ground.
OK or NG
OK >> Unlock sensor is OK.
NG >> GO TO 2.
2. CHECK HARNESS CONTINUITY
1. Disconnect back door closure control unit and front door lock assembly (passenger side) connector.
2. Check continuity between back door closure control unit con-
nector D106 terminal 5 and front door lock assembly (passenger
side) connector D40 terminal 5.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between back door closure
control unit and front door lock assembly (passenger
side).
3. CHECK GROUND CIRCUIT
Check continuity between front door lock assembly (passenger side)
connector D40 terminal 4 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
ConnectorTerminals (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (-)
D106 5 (W) GroundPassenger side door lock is
locked5
Passenger side door lock is
unlocked0
PIIA6182E
5 (W) – 5 (W) : Continuity should exist.
PIIA6183E
4 (B) – Ground : Continuity should exist.
PIIA6184E

BL-182
VEHICLE SECURITY (THEFT WARNING) SYSTEM
Revision: 2004 November 2004 FX35/FX45
System DescriptionAIS004OT
DESCRIPTION
Operation Flow
Setting the Vehicle Security System
Initial condition

Ignition switch is in OFF position.
Disarmed phase

When hood, doors or back door is open, the vehicle security system is set in the disarmed phase on the
assumption that the owner is inside or near the vehicle.

When the vehicle security system is in the disarmed phase, the security indicator lamp blinks every 2.4
seconds.
Pre-armed phase and armed phase
When the following operation 1 or 2 is performed, the vehicle security system turns into the “pre-armed”
phase. (The security indicator lamp illuminates.)
1. BCM receives LOCK signal from front door key cylinder switch, key fob or Intelligent Key after hood, back
door and all doors are closed.
2. Hood, back door and all doors are closed after front doors are locked by key or door lock and unlock
switch.
The security indicator lamp illuminates for 30 seconds. then, the system automatically shifts into the
“armed” phase.
PIIB0176E

VEHICLE SECURITY (THEFT WARNING) SYSTEM
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Canceling the Set Vehicle Security System
When one of the following operations is performed, the armed phase is canceled.
1. Unlock the doors with the key, key fob or Intelligent Key.
2. Turn ignition switch “ON” or “ACC” position.
Canceling the Alarm Operation of the Vehicle Security System
When unlock the door with the key, key fob or Intelligent Key the alarm operation is canceled.
Activating the Alarm Operation of the Vehicle Security System
Make sure the system is in the armed phase. (The security indicator lamp brinks every 2.4 seconds.)
When the following operation 1 or 2 is performed, the system sounds the horns and flashes the headlamps for
about 50 seconds.
1. Hood, back door or any door is opened during armed phase.
2. Disconnecting and connecting the battery connector before canceling armed phase.
POWER SUPPLY
Power is supplied at all times

through 10A fuse [No.19, located in the fuse block (J/B)]

to security indicator lamp terminal 1.

through 50A fusible link (letter M , located in the fuse and fusible link box)

to BCM terminal 55.

through 15A fuse [No.22, located in the fuse block (J/B)]

to BCM terminal 42.

through 15A fuse [No.34, located in the fuse and fusible link box]

to horn relay terminal 2.

through 10A fuse [No.71, located in the IPDM E/R]

to IPDM E/R internal CPU.

through 15A fuse [No.78, located in the IPDM E/R]

to IPDM E/R internal CPU.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 6, located in the fuse block (J/B)]

to BCM terminal 11.
INITIAL CONDITION TO ACTIVATE THE SYSTEM
The operation of the vehicle security system is controlled by the doors, hood and back door.
To activate the vehicle security system, BCM must receive signals indicating the doors, hood and back door
are closed and the doors are locked by key fob, Intelligent Key or ignition key.
When a door is open, BCM terminal 12 (passenger side door), 13 (rear RH door), 62 (driver side door), 63
(rear LH door) receives a ground signal from each door switch.
When front door LH is unlocked by power window main switch (door lock and unlock switch),
BCM terminal 22 receives a signal from terminal 14 of power window main switch with power window serial
link.
When front door RH is unlocked by front power window switch (passenger side) (door lock and unlock switch),
BCM terminal 22 receives a signal from terminal 16 of front power window switch (passenger side) with power
window serial link.
When the hood is open, IPDM E/R receives a ground signal

to IPDM E/R terminal 56

through hood switch terminal 2

through hood switch terminal 1

through body grounds E21, E50 and E51.
The IPDM E/R then sends a signal to the BCM through the CAN SYSTEM.
When the back door is open,

to BCM terminal 58

through back door closure motor terminal 7

BL-184
VEHICLE SECURITY (THEFT WARNING) SYSTEM
Revision: 2004 November 2004 FX35/FX45

through back door closure motor terminal 8

through body grounds B15 and B45.
VEHICLE SECURITY SYSTEM ALARM OPERATION
The vehicle security system is triggered by

opening a door

opening the back door

opening the hood

detection of battery disconnect and connect.
The vehicle security system will be triggered once the system is in armed phase,
When BCM receives a ground signal at terminals 12 (passenger side door), 13 (rear RH door), 58 (back door),
62 (driver side door), 63 (rear LH door), or receives a signal from the IPDM E/R (hood switch).
When the vehicle security system is triggered,
ground is supplied intermittently from IPDM E/R terminals 38 and 60.
When headlamp high relay (with built-in IPDM E/R) and horn relay are energized and then power is supplied
to headlamps (LH and RH) and horns (HIGH and LOW).
The headlamps flash and the horn sounds intermittently.
The alarm automatically turns off after 50 seconds, but will reactivate if the vehicle is tampered with again.
VEHICLE SECURITY SYSTEM DEACTIVATION
To deactivate the vehicle security system, a door or the back door must be unlocked with the key, key fob or
Intelligent Key.
When the key is used to unlock a door, BCM terminal 22 receives signal

from terminal 14 of the power window main switch (door lock and unlock switch).
When the BCM receives either one of these signals or unlock signal from key cylinder switch, key fob or Intel-
ligent Key, the vehicle security system is deactivated. (Disarmed phase)
PANIC ALARM OPERATION
Remote keyless entry system may or may not operate vehicle security system (horn and headlamps) as
required.
When the remote keyless entry system is triggered, ground is supplied intermittently from IPDM E/R terminals
38 and 60.
When headlamp relay (which built-in IPDM E/R) and horn relay are energized and then power is supplied to
headlamps (LH and RH) and horns (HIGH and LOW).
The headlamp flashes and the horn sounds intermittently.
The alarm automatically turns off after 25 seconds or when BCM receives any signal from key fob or Intelligent
Key.

BL-194
VEHICLE SECURITY (THEFT WARNING) SYSTEM
Revision: 2004 November 2004 FX35/FX45
7. Select diagnosis mode.
“DATA MONITOR”, “ACTIVE TEST” AND “WORK SUPPORT”
CONSULT-II APPLICATION ITEM
Work Support
Data Monitor
Active Test
SEL274W
Test Item Description
SECURITY ALARM SET This mode is able to confirm and change security alarm ON-OFF setting.
THEFT ALM TRGThe switch which triggered vehicle security alarm is recorded. This mode is able to confirm and
erase the record of vehicle security alarm. The trigger data can be erased by touching “CLEAR”
on CONSULT-II screen.
Monitored Item Description
IGN ON SW Indicates [ON/OFF] condition of ignition switch.
ACC ON SW Indicates [ON/OFF] condition of ignition switch in ACC position.
KEY ON SW Indicates [ON/OFF] condition of key switch.
TRUNK OPNR SW This is displayed even when it is not equipped.
TRUNK CYL SW This is displayed even when it is not equipped.
TRUNK OPN MNTR This is displayed even when it is not equipped.
KEYLESS LOCK Indicates [ON/OFF] condition of lock signal from key fob.
KEYLESS UNLOCK Indicates [ON/OFF] condition of unlock signal from key fob.
KEYLESS TRUNK Indicates [ON/OFF] condition of trunk opener signal from key fob.
HOOD SW Indicates [ON/OFF] condition of hood switch.
DOOR SW-DR Indicates [ON/OFF] condition of front door switch LH.
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.
BACK DOOR SW Indicates [ON/OFF] condition of back door switch.
KEY CYL LK SW Indicates [ON/OFF] condition of lock signal from key cylinder switch.
KEY CYL UN SW Indicates [ON/OFF] condition of unlock signal from key cylinder switch.
CDL LOCK SW Indicates [ON/OFF] condition of lock signal from door lock/unlock switch LH and RH.
CDL UNLOCK SW Indicates [ON/OFF] condition of unlock signal from door lock/unlock switch LH and RH.
Test Item Description
THEFT INDThis test is able to check security indicator lamp operation. The lamp will be turned on when “ON”
on CONSULT-II screen is touched.
ANTI THEFT HORNThis test is able to check vehicle security horn operation. The horns will be activated for 0.5 sec-
onds after “ON” on CONSULT-II screen is touched.
HEADLAMP(HI)This test is able to check vehicle security lamp operation. The headlamps will be activated for 0.5
seconds after “ON” on CONSULT-II screen is touched.

VEHICLE SECURITY (THEFT WARNING) SYSTEM
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Trouble DiagnosisAIS004P1
WORK FLOW

“POWER DOOR LOCK SYSTEM” Diagnosis; refer to BL-37, "Work Flow" .

“REMOTE CONTROL SYSTEM” Diagnosis; refer to BL-68, "Work Flow" .

“INTELLIGENT KEY SYSTEM” Diagnosis; refer to BL-113, "WORK FLOW" .
PIIA6909E

VEHICLE SECURITY (THEFT WARNING) SYSTEM
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Trouble Diagnosis Symptom ChartAIS004P3
*1: Make sure the system is in the armed phase.Procedure
Diagnostic procedure Refer to page
Symptom
1Vehicle security
system cannot be
set by ····Door switch Diagnostic Procedure 1 (Check door, hood and back door switch)BL-198
Lock / unlock switch Diagnostic Procedure 6 (Check door lock / unlock switch)BL-205
Door outside key Diagnostic Procedure 3 (Check door key cylinder switch)BL-205
Key fob Check remote keyless entry.BL-56
Intelligent Key Check Intelligent Key.BL-84
— If the above systems are “OK”, replace BCM.BCS-15
Security indicator does not turn “ON”.Diagnostic Procedure 2 (Check security indicator lamp)BL-204If the above systems are “OK”, replace BCM.BCS-15
2*1 Vehicle secu-
rity system does
not alarm when
····Any door is opened.Diagnostic Procedure 1 (Check door, hood and back door switch)BL-198If the above systems are “OK”, replace BCM.BCS-15
3Vehicle security
alarm does not
activate.Horn alarmDiagnostic Procedure 4 (Check vehicle security horn alarm)BL-205
Check horn function. BL-79
If the above systems are “OK”, replace BCM.BCS-15
Head lamp alarmDiagnostic Procedure 5 (Check head lamp alarm)BL-205If the above systems are “OK”, replace BCM.BCS-15
4Vehicle security
system cannot be
canceled by ····Door outside keyDiagnostic Procedure 3 (Check door key cylinder switch)BL-205
If the above systems are “OK”, check power window main switch.EI-35
Key fobCheck remote keyless entry function.BL-57If the above systems are “OK”, replace BCM.BCS-15
Intelligent KeyCheck Intelligent KeyBL-86If the above systems are “OK”, replace BCM.BCS-15

VEHICLE SECURITY (THEFT WARNING) SYSTEM
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Diagnostic Procedure 3AIS004P6
FRONT DOOR KEY CYLINDER SWITCH CHECK
1. CHECK KEY CYLINDER SWITCH OPERATION
Check door key cylinder switch using key.
Do doors lock / unlock when using the key?
YES >> Front door key cylinder switch operation is OK.
NO >> Check door key cylinder switch circuit. Refer to GW-69, "
Front Door Key Cylinder Switch Check" .
Diagnostic Procedure 4AIS004P7
VEHICLE SECURITY HORN ALARM CHECK
1. CHECK HORN OPERATION
Check if horn sounds with horn switch.
Does horn operate?
YES >> Check harness for open or short between IPDM E/R and horn relay.
NO >> Check horn circuit. Refer to WW-56, "
HORN" .
Diagnostic Procedure 5AIS004P8
VEHICLE SECURITY HEADLAMP ALARM CHECK
1. CHECK HEADLAMP OPERATION
Check if headlamp operates by lighting switch.
Does headlamp come on when turning switch
“ON”?
YES >> Headlamp alarm circuit is OK.
NO >> Check headlamp system. Refer to LT- 7 , "
HEADLAMP - XENON TYPE -" or LT- 3 8 , "DAYTIME
LIGHT SYSTEM" .
Diagnostic Procedure 6AIS004P9
DOOR LOCK AND UNLOCK SWITCH CHECK
1. CHECK DOOR LOCK AND UNLOCK SWITCH INPUT SIGNAL
Check if power door lock operated by door lock and unlock switch.
Do doors lock / unlock when using each door lock and unlock switches?
YES >> Door lock and unlock switch is OK.
NO >> Check door lock and unlock switch. Refer to BL-48, "
Check Door Lock and Unlock Switch" .