IDX INFINITI QX4 2001 Factory Service Manual

Trouble DiagnosesNBEL0110SYMPTOM CHARTNBEL0110S01
REFERENCE PAGE (EL- ) 262 263 264 265 266 267 268
SYMPTOM
MAIN POWER SUPPLY AND GROUND CIRCUIT CHECK
DOOR SWITCH CHECK
KEY SWITCH (INSERT) CHECK
DOOR LOCK/UNLOCK SWITCH CHECK
FRONT DOOR KEY CYLINDER SWITCH CHECK
BACK DOOR KEY CYLINDER SWITCH CHECK
DOOR LOCK ACTUATOR CHECK
Key reminder door system does not operate
properly.XXX X
Specific door lock actuator does not operate. X X
Power door lock does not operate with door
lock and unlock switch (LH and RH) on door
trim.XX
Power door lock does not operate with front
door key cylinder operation.XX
Power door lock does not operate with back
door key cylinder operation.XX
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POWER DOOR LOCK
Trouble Diagnoses
EL-261

DOOR SWITCH CHECK=NBEL0110S05
1 CHECK DOOR SWITCH INPUT SIGNAL
Check voltage between smart entrance control unit terminals 28, 29 or 40 and ground.
SEL305X
Refer to wiring diagram in EL-256.
OK or NG
OK©Door switch is OK.
NG©GO TO 2.
2 CHECK DOOR SWITCH
1. Disconnect door switch connector.
2. Check continuity between door switch terminals.
SEL306X
OK or NG
OK©Check the following.
IDoor switch ground circuit (Front LH, back door) or door switch ground condition
IHarness for open or short between smart entrance control unit and door switch
NG©Replace door switch.
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POWER DOOR LOCK
Trouble Diagnoses (Cont'd)
EL-263

DOOR LOCK/UNLOCK SWITCH CHECK=NBEL0110S03
1 CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL
1. Disconnect smart entrance control unit connector.
2. Check continuity between control unit terminal 23 or 35 and ground.
SEL309X
Refer to wiring diagram in EL-257.
OK or NG
OK©Door lock/unlock switch is OK.
NG©GO TO 2.
2 CHECK DOOR LOCK/UNLOCK SWITCH
1. Disconnect door lock/unlock switch connector.
2. Check continuity between each door lock/unlock switch terminals.
IPower window main switch (Door lock/unlock switch LH)
SEL310X
IDoor lock/unlock switch RH
SEL311X
OK or NG
OK©Check the following.
IGround circuit for door lock/unlock switch
IHarness for open or short between door lock/unlock switch and smart entrance control
unit connector
NG©Replace door lock/unlock switch.
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POWER DOOR LOCK
Trouble Diagnoses (Cont'd)
EL-265

BACK DOOR KEY CYLINDER SWITCH CHECK=NBEL0110S08
1 CHECK BACK DOOR KEY CYLINDER SWITCH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)
Check voltage between smart entrance control unit terminals 30 or 41 and ground.
SEL314X
Refer to wiring diagram in EL-258.
OK or NG
OK©Back door key cylinder switch is OK.
NG©GO TO 2.
2 CHECK BACK DOOR KEY CYLINDER SWITCH
1. Disconnect back door key cylinder switch connector.
2. Check continuity between back door key cylinder switch terminals.
SEL315X
OK or NG
OK©Check the following.
IBack door key cylinder switch ground circuit
IHarness for open or short between smart entrance control unit and back door key cyl-
inder switch
NG©Replace back door key cylinder switch.
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POWER DOOR LOCK
Trouble Diagnoses (Cont'd)
EL-267

2 CHECK DOOR LOCK ACTUATOR
1. Disconnect door lock actuator connector.
2. Apply 12V direct current to door lock actuator and check operation.
SEL318X
SEL319X
OK or NG
OK©Check harness for open or short between smart entrance control unit connector and door
lock actuator.
NG©Replace door lock actuator.
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POWER DOOR LOCK
Trouble Diagnoses (Cont'd)
EL-269

When the front door switch LH is OPEN, ground is supplied
Ito smart entrance control unit terminal 29
Ithrough front door switch LH terminal 1
Ito front door switch LH terminal 2
Ithrough body grounds B11, B22 and D210.
When the front door switch RH is OPEN, ground is supplied
Ito smart entrance control unit terminal 40
Ithrough front door switch RH body ground.
When the other door switches are OPEN, ground is supplied
Ito smart entrance control unit terminal 28
Ithrough other door switches body grounds.
Remote controller signal is inputted to smart entrance control unit (The antenna of the system is combined
with smart entrance control unit).
OPERATIONNBEL0112S03The multi-remote control system controls operation of the
Ipower door lock
Iinterior lamp
Ipanic alarm
Ihazard and horn reminder
OPERATED PROCEDURENBEL0112S02Power Door Lock OperationNBEL0112S0201Smart entrance control unit receives a LOCK signal from remote controller. Smart entrance control unit locks
all doors with input of LOCK signal from remote controller.
When an UNLOCK signal is sent from remote controller once, driver's door will be unlocked.
Then, if an UNLOCK signal is sent from remote controller again within 5 seconds, all other door will be
unlocked.
Hazard and Horn ReminderNBEL0112S0204When smart entrance control unit receives LOCK or UNLOCK signal from remote controller with all doors
closed, ground is supplied
Ito multi-remote control relay terminal 2
Ithrough smart entrance control unit terminal 7, and
Ito horn relay terminal 2
Ithrough smart entrance control unit terminal 19
Multi-remote control relay and horn relay are now energized, and hazard warning lamp flashes and horn
sounds as a reminder.
The hazard and horn reminder has a horn chirp mode (C mode) and a non-horn chirp mode (S mode).
Operating function of hazard and horn reminder
Horn chirp mode (C mode) Non-horn chirp mode (S mode)
Hazard warning lamp
flashHorn soundHazard warning lamp
flashHorn sound
Lock Twice Once Twice Ð
Unlock Once Ð Ð Ð
How to change hazard and horn reminder mode
When LOCK and UNLOCK signals are sent from the remote controller for more than 2 seconds at the same
time, the hazard and horn reminder mode is changed and hazard warning lamp flashes and horn sounds as
follows:
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MULTI-REMOTE CONTROL SYSTEM
System Description (Cont'd)
EL-271

SchematicNBEL0113
MEL853L
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MULTI-REMOTE CONTROL SYSTEM
Schematic
EL-273

FIG. 2NBEL0114S02
MEL855L
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MULTI-REMOTE CONTROL SYSTEM
Wiring Diagram Ð MULTI Ð (Cont'd)
EL-275

Trouble DiagnosesNBEL0115SYMPTOM CHARTNBEL0115S01NOTE:
IAlways check remote controller battery before replacing
remote controller.
IThe panic alarm operation of multi-remote control system does
not activate with the ignition key inserted in the ignition key
cylinder.
Symptom Diagnoses/service procedureReference
page
(EL- )
All function of multi-remote control system do not
operate.1. Remote controller battery check 278
2. Power supply and ground circuit for control unit check 279
3. Replace romote controller. Refer to ID Code Entry Procedure. 291
The new ID of remote controller cannot be
entered.1. Remote controller battery check 278
2. Key switch (insert) check 282
3. Door switch check 281
4. Door lock/unlock switch LH check 283
5. Power supply and ground circuit for control unit check 279
6. Replace romote controller. Refer to ID Code Entry Procedure. 291
Door lock or unlock does not function.
(If the power door lock system does not operate
manually, check power door lock system. Refer to
EL-261.)1. Replace remote controller. Refer to ID Code Entry Procedure. 291
Hazard and horn reminder does not activate prop-
erly when pressing lock or unlock button of remote
controller.1. Harzard reminder check 285
2. Horn reminder check*
*: Horn chirp can be activated or deactivated.
First check the horn chirp setting. Refer to ªSystem Descriptionº,
EL-270.287
3. Door switch check 281
4. Replace remote controller. Refer to ID Code Entry Procedure. 291
Interior lamp operation does not activate properly. 1. Interior room lamp operation check 288
2. Door switch check 281
3. Front LH door unlock sensor check 284
Panic alarm (horn and headlamp) does not acti-
vate when panic alarm button is continuously
pressed.1. Theft warning operation check. Refer to ªPRELIMINALY
CHECKº in ªTHEFT WARNING SYSTEMº.306
2. Key switch (insert) check 282
3. Replace remote controller. Refer to ID Code Entry Procedure. 291
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MULTI-REMOTE CONTROL SYSTEM
Trouble Diagnoses
EL-277

POWER SUPPLY AND GROUND CIRCUIT CHECK=NBEL0115S04
1 CHECK MAIN POWER SUPPLY CIRCUIT FOR CONTROL UNIT
1. Disconnect connector from control unit.
2. Check voltage between smart entrance control unit terminal 10 or 11 and ground.
SEL320X
Refer to wiring diagram in EL-274.
OK or NG
OK©GO TO 2.
NG©Check the following.
I40A fusible link (letterf, located in fuse and fusible link box)
I7.5A fuse [No. 24, located in fuse block (J/B)]
IM145 circuit breaker
IHarness for open or short between smart entrance control unit and fuse
2 CHECK IGNITION SWITCH ªACCº CIRCUIT
1. Disconnect smart entrance control unit connector.
2. Check voltage between control unit terminal 21 and ground while ignition switch is ªACCº.
SEL321X
Refer to wiring diagram in EL-274.
OK or NG
OK©GO TO 3.
NG©Check the following.
I10A fuse [No. 10, located in fuse block (J/B)]
IHarness for open or short between smart entrance control unit and fuse
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MULTI-REMOTE CONTROL SYSTEM
Trouble Diagnoses (Cont'd)
EL-279