Ac system INFINITI QX4 2001 Factory Service Manual

SEL417V
FAIL-SAFE SYSTEM CHECK=NBEL0218S021. Turn ignition switch to ON position.
2. Turn ASCD main switch to ON and check if the SET indicator
blinks.
If the indicator lamp blinks, check the following.
IASCD steering switch. Refer to EL-234.
SEL767P
3. Drive the vehicle at more than 40 km/h (25 MPH) and push
SET/COAST switch.
If the indicator lamp blinks, check the following.
IVehicle speed sensor. Refer to EL-235.
IASCD pump circuit. Refer to EL-235.
IReplace control unit.
SAT797A
4. Depress brake pedal slowly (brake pedal should be depressed
more than 5 seconds).
If the indicator lamp blinks, check the following.
IASCD brake/stop lamp switch. Refer to EL-233.
5. END. (System is OK.)
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AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Trouble Diagnoses (Cont'd)
EL-231

ASCD Wire Adjustment=NBEL0220
MEL383K
CAUTION:
IBe careful not to twist ASCD wire when removing it.
IDo not tense ASCD wire excessively during adjustment.
Adjust the tension of ASCD wire in the following manner.
1. Loosen lock nut and adjusting nut.
2. Make sure that accelerator wire is properly adjusted. Refer to
FE-3, ªACCELERATOR CONTROL SYSTEMº.
3. Tighten adjusting nut just until throttle drum starts to move.
4. Loosen adjusting nut again 1/2 to 1 turn.
5. Tighten lock nut.
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
ASCD Wire Adjustment
EL-240

System DescriptionNBEL0102Power is supplied at all times
Ifrom 40A fusible link (letterf, located in the fuse and fusible link box)
Ito circuit breaker terminal 1
Ithrough circuit breaker terminal 2
Ito power window relay terminal 3,
Ito front power window main switch terminal 4, and
Ito front power window switch RH terminal 6.
With ignition switch in ON or START position, power is supplied
Ithrough 7.5A fuse [No. 11, located in the fuse block (J/B)]
Ito power window relay terminal 2, and
Ito smart entrance control unit terminal 33.
Ground is supplied to power window relay terminal 1
Ithrough body grounds M4, M66 and M147.
The power window relay is energized and power is supplied
Ithrough power window relay terminal 5
Ito front power window main switch terminal 11,
Ito front power window switch RH terminal 13,
Ito rear power window switch LH and RH terminals 5.
MANUAL OPERATIONNBEL0102S01Front Door LHNBEL0102S0101Ground is supplied
Ito front power window main switch terminal 5
Ithrough body grounds M77 and M111.
WINDOW UP
When the front LH switch in the front power window main switch is pressed in the up position, power is sup-
plied
Ito front power window regulator LH terminal 1
Ithrough front power window main switch terminal 2.
Ground is supplied
Ito front power window regulator LH terminal 3
Ithrough front power window main switch terminal 3.
Then, the motor raises the window until the switch is released.
WINDOW DOWN
When the LH switch in the front power window main switch is pressed in the down position, power is supplied
Ito front power window regulator LH terminal 3
Ithrough front power window main switch terminal 3.
Ground is supplied
Ito front power window regulator LH terminal 1
Ithrough front power window main switch terminal 2.
Then, the motor lowers the window until the switch is released.
Front Door RHNBEL0102S0102Ground is supplied
Ito front power window main switch terminal 5
Ithrough body grounds M77 and M111.
NOTE:
Numbers in parentheses are terminal numbers, when power window switch is pressed in the UP and DOWN
positions respectively.
FRONT POWER WINDOW MAIN SWITCH OPERATION
When front RH switch in the front power window main switch is pressed UP or DOWN, a signal is supplied
Ithrough front power window main switch terminal 8
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POWER WINDOW
System Description
EL-241

Ito front power window switch RH terminal 11.
The subsequent operation is the same as the front power window switch RH operation.
FRONT POWER WINDOW SWITCH RH OPERATION
Power is supplied
Ithrough front power window switch RH (5, 4)
Ito front power window regulator RH (1, 3).
Ground is supplied
Ito front power window regulator RH (3, 1)
Ithrough front power window switch RH (4, 5)
Ito front power window switch RH terminal 12
Ithrough front power window main switch terminal 1.
Then, the motor raises or lowers the window until the switch is released.
Rear Door LHNBEL0102S0104Ground is supplied
Ito front power window main switch terminal 5
Ithrough body grounds the M77 and M111.
NOTE:
Numbers in parentheses are terminal numbers, when the power window switch is pressed in the UP and
DOWN positions.
FRONT POWER WINDOW MAIN SWITCH OPERATION
Power is supplied
Ithrough front power window main switch terminal (13, 12)
Ito rear power window switch LH terminal (3, 4)
The subsequent operation is the same as the rear power window switch LH operation.
REAR POWER WINDOW SWITCH LH
Power is supplied
Ithrough rear power window switch LH (1, 2)
Ito rear power window regulator LH (1, 2)
Ground is supplied
Ito rear power window regulator LH (2, 1)
Ithrough rear power window switch LH (2, 1)
Ito rear power window switch LH terminal (4, 3)
Ithrough front power window main switch terminal (12, 13)
Then, the motor raises or lowers the window until the switch is released.
Rear Door RHNBEL0102S0105Rear door RH windows will rise and lower in the same manner as the rear door LH window.
AUTO OPERATIONNBEL0102S02The power window AUTO feature enables the driver or front passenger to open or close the driver's and front
passenger's window without holding the window switch in the up or down position.
The AUTO feature only operates on the driver's and front passenger's window upward and downward move-
ment.
POWER WINDOW LOCKNBEL0102S03The power window lock is designed to lock operation of all windows except for driver's door window.
When the lock switch is pressed to lock position, the ground of the front and rear power window switches, in
the power window main switch, is disconnected. This prevents the power window motors from operating.
RETAINED POWER OPERATIONNBEL0102S04When the ignition switch is turned to OFF position from ON or START position, power is supplied for 45 sec-
onds
Ito power window relay terminal 2
Ifrom smart entrance control unit terminal 5.
Ground is always supplied
POWER WINDOW
System Description (Cont'd)
EL-242

Ito power window relay terminal 1
Ithrough body grounds.
When power and ground are supplied, the power window relay continues to be energized, and the power win-
dow can be operated.
The retained power operation is canceled when the driver or passenger side door is opened.
INTERRUPTION DETECTION FUNCTIONNBEL0102S05Front power window main switch and front power window switch RH monitor the power window regulator motor
operation and the power window position (full closed or other) for driver's and passenger's power window by
the signals from encoder and limit switch in front power window regulator LH or RH.
When front power window main switch or front power window switch RH detects interruption during the fol-
lowing close operation in the driver's or front passenger's side door,
Iautomatic close operation when ignition switch is in the ªONº position
Iautomatic close operation during retained power operation
front power window main switch or front power window switch RH controls driver's or front passenger's power
window regulator motor for open and the power window will be lowered about 150 mm (5.91 in).
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POWER WINDOW
System Description (Cont'd)
EL-243

Component Parts and Harness Connector
Location
NBEL0106
SEL065WA
System DescriptionNBEL0107OPERATIONNBEL0107S04
IThe lock/unlock switch (LH and RH) on door trim can lock and unlock all doors.
IWith the door key inserted in the key cylinder on front LH or back door, turning it to ªLOCKº, will lock all
doors; turning it to ªUNLOCKº once unlocks the corresponding door; turning it to ªUNLOCKº again within
5 seconds after the first unlock operation unlocks all of the other doors. (Signals from door key cylinder
switch)
IIf the ignition key is in the ignition key cylinder and one or more of doors are open, setting the lock/unlock
switch to ªLOCKº locks the doors once but then immediately unlock them. (Combination signals from key
switch and door switches) - (KEY REMINDER DOOR SYSTEM)
POWER DOOR LOCK
Component Parts and Harness Connector Location
EL-254

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

Component Parts and Harness Connector
Location
NBEL0111
SEL355X
System DescriptionNBEL0112INPUTSNBEL0112S01Power is supplied at all times
Ito smart entrance control unit terminal 11
Ithrough circuit breaker
Ithrough 40A fusible link (letterflocated in the fuse and fusible link box),
Ito key switch terminal 2, and
Ito smart entrance control unit terminal 10
Ithrough 7.5A fuse [No. 24, located in the fuse block (J/B)].
Ito multi-remote control relay terminals 1, 3 and 6
Ithrough 15A fuse [No. 20, located in the fuse block (J/B)].
Ito horn relay terminals 1 and 3
Ithrough 7.5A fuse [No. 52, located in the fuse block (J/B)].
Ito horn relay terminal 6
Ithrough 10A fuse [No. 54, located in the fuse block (J/B)].
When the ignition switch is in the ACC or ON position, power is supplied to smart entrance control unit termi-
nal 21.
When the key switch is ON (ignition key is inserted in key cylinder), power is supplied
Ithrough key switch terminal 1
Ito smart entrance control unit terminal 32.
MULTI-REMOTE CONTROL SYSTEM
Component Parts and Harness Connector Location
EL-270

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

SEL153WB
Interior Lamp OperationNBEL0112S0202When the following input signals are both supplied:
Idoor switch CLOSED (when all the doors are closed);
Idriver's door LOCKED;
multi-remote control system turns on interior lamp (for 30 seconds) with input of UNLOCK signal from remote
controller.
For detailed description, refer to ªINTERIOR, SPOT, VANITY MIRROR AND LUGGAGE ROOM LAMPSº (EL-
88).
Panic Alarm OperationNBEL0112S0203When key switch is OFF (when ignition key is not inserted in key cylinder), multi-remote control system turns
on and off horn and headlamp intermittently with input of PANIC ALARM signal from remote controller.
For detailed description, refer to ªTHEFT WARNING SYSTEMº (EL-297).
MULTI-REMOTE CONTROL SYSTEM
System Description (Cont'd)
EL-272