stop start INFINITI QX4 2001 Factory Owners Manual

5. If a leak detector detects a leak, verify at least once by blow-
ing compressed air into area of suspected leak, then repeat
check as outlined above.
6. Do not stop when one leak is found. Continue to check for
additional leaks at all system components.
If no leaks are found, perform steps7-10.
7. Start engine.
8. Set the heater A/C control as follows:
1) A/C switch ON.
2) Face mode
3) Recirculation switch ON
4) Max cold temperature
5) Fan speed high
9. Run engine at 1,500 rpm for at least 2 minutes.
10. Turn engine off and perform leak check again following steps
4 through 6 above.
SHA839E
Refrigerant leaks should be checked immediately after
stopping the engine. Begin with the leak detector at the
compressor. The pressure on the high pressure side will
gradually drop after refrigerant circulation stops and pres-
sure on the low pressure side will gradually rise, as shown
in the graph. Some leaks are more easily detected when
pressure is high.
11. Before connecting ACR4 to vehicle, check ACR4 gauges. No
refrigerant pressure should be displayed. If pressure is
displayed, recover refrigerant from equipment lines and then
check refrigerant purity.
12. Confirm refrigerant purity in supply tank using ACR4 and refrig-
erant identifier.
13. Confirm refrigerant purity in vehicle A/C system using ACR4
and refrigerant identifier.
14. Discharge A/C system using approved refrigerant recovery
equipment. Repair the leaking fitting or component as neces-
sary.
15. Evacuate and recharge A/C system and perform the leak test
to confirm no refrigerant leaks.
16. Conduct A/C performance test to ensure system works
properly.
SERVICE PROCEDURE
Refrigerant Lines (Cont'd)
HA-158

Propeller shaft greasing .................................MA-23
Propeller shaft inspection ..............................MA-23
Propeller shaft on vehicle service ....................PD-6
Propeller shaft vibration ...................................PD-6
PST/SW - Wiring diagram ............................EC-635
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Rack retainer adjustment ..................................ST-8
Radiator ....................................................LC-19, 21
Radio - See Audio.........................................EL-160
Rear air spoiler ...............................................BT-35
Rear axle ........................................................AX-17
Rear bumper ...................................................BT-15
Rear case (Transfer) .....................................TF-123
Rear combination lamp removal and
installation ...................................................BT-35
Rear cover packing replacement diff. ............PD-16
Rear door ........................................................BT-20
Rear drum brake ............................................BR-26
Rear heated oxygen sensor
(HO2S) .............................EC-247, 257, 267, 277
Rear heated oxygen sensor (HO2S)
heater ........................................................EC-286
Rear seat ........................................................BT-44
Rear seat belt ...................................................RS-5
Rear side window ...........................................BT-55
Rear suspension ............................................SU-15
Rear washer..................................................EL-141
Rear window defogger ..................................EL-151
Rear wiper.....................................................EL-141
REF - Wiring diagram ..................................EC-510
Refregerant pressure sensor ........................HA-111
Refrigerant connection precaution ...................HA-4
Refrigerant discharging evacuating
charging ....................................................HA-144
Refrigerant general precaution.........................HA-3
Refrigerant lines ...........................................HA-154
Refrigerant pressure sensor.........................EC-639
Refrigeration cycle..........................................HA-14
REMOTE - Wiring diagram ...........................EL-168
Removal and installation (A/T) ......................AT-277
Removal and installation (Transfer) ..............TF-119
Reverse clutch...............................................AT-314
Revolution sensor (A/T).................................AT-115
Ring gear diff. inspection .........................PD-23, 47
RO2H-L - Wiring diagram.............................EC-290
RO2H-R - Wiring diagram ............................EC-289
Road wheel size ..............................................GI-44
Roof trim .........................................................BT-32
Room lamp - See Interior lamp ......................EL-88
RRO2LH - Wiring diagram...EC-251, 261, 271, 281
RRO2RH - Wiring diagram ..EC-250, 260, 270, 280
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SAE J1930 terminology list .............................GI-51
Screw jack .......................................................GI-45Seal - See Exterior .........................................BT-35
SEAT - Wiring diagram .................................EL-181
Seat belt inspection .............................MA-28, RS-7
Seat belt pre-tensioner .....................................RS-3
Seat belt pre-tensioner disposal ....................RS-22
Seat belt, front ..................................................RS-4
Seat belt, rear...................................................RS-5
Seat, front .......................................................BT-41
Seat, rear ........................................................BT-44
Self-diagnosis (Transfer) .................................TF-27
SHIFT - Wiring diagram ................................AT-266
Shift lock system ...........................................AT-265
Shift schedule ................................................AT-356
Shift solenoid valve A (A/T) ..AT-125, 137, 147, 171
Shift solenoid valve B (A/T) ..AT-125, 131, 147, 175
Shock absorber (rear) ....................................SU-18
Side air bag ....................................................RS-21
Side bearing preload (front final drive
4WD) ...........................................................PD-24
Side trim ..........................................................BT-28
Side window - See Rear side window ............BT-55
Smart entrance control unit ..........................EL-319
SMJ (super multiple junction) .......................Foldout
Spare tire size .................................................GI-44
Spark plug replacement .................................MA-19
Speedometer...................................................EL-94
Spiral cable.....................................................RS-17
Spot lamp ........................................................EL-88
Spring (Wheelarch) height ...............................SU-5
SROOF - Wiring diagram .............................EL-174
SRS - See Supplemental Restraint
System ........................................................RS-10
SRS - Wiring diagram ....................................RS-35
S/SIG - Wiring diagram ................................EC-622
Stabilizer bar (front)........................................SU-10
Stabilizer bar (rear) ........................................SU-20
Stall test (A/T) .................................................AT-59
Standardized relay ............................................EL-7
START - Wiring diagram.................................SC-11
Start signal ...................................................EC-621
Starter .............................................................SC-18
Starting system...............................................SC-10
Steering gear, linkage and transfer
gear inspection ...........................................MA-26
Steering linkage ..............................................ST-17
Steering switch................................................EL-30
Steering transfer gear .....................................ST-15
Steering wheel and column.............................ST-11
Steering wheel play ..........................................ST-7
Steering wheel turning force .............................ST-9
Stop lamp ........................................................EL-67
STOP/L - Wiring diagram................................EL-67
Strut (front) .......................................................SU-8
Sub-oil pump (Transfer) ................................TF-131
Sun gear (Transfer).......................................TF-134
Sun roof, electric ...........................................EL-173
Sunload sensor ............................................HA-135
Sunroof............................................................BT-45
Supplemental Restraint System .....................RS-10
Supplemental restraint system - Wiring
diagram .......................................................RS-35
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ALPHABETICAL INDEX
IDX-7

SLC031B
2. Install water pump.
IDo not allow cylinder block to nip O-rings when installing
water pump.
SLC944A
3. Before installing, remove all traces of liquid gasket from mat-
ing surface of water pump cover and chain tensioner cover
using a scraper.
Also remove traces of liquid gasket from mating surface of
front cover.
SLC945AA
4. Apply a continuous bead of liquid gasket to mating surface of
chain tensioner cover and water pump cover.
SLC156B
5. Return the crankshaft pulley to its original position by turning
it 20É forward.
SLC961A
6. Install timing chain tensioner, then remove the stopper pin.
IWhen installing the timing chain tensioner, engine oil
should be applied to the oil hole and tensioner.
IAfter starting engine, let idle for three minutes, then rev
engine up to 3,000 rpm under no load to purge air from the
high-pressure chamber of the chain tensioners. The
engine may produce a rattling noise. This indicates that
air still remains in the chamber and is not a matter of
concern.
7. Reinstall any parts removed in reverse order of removal.
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ENGINE COOLING SYSTEM
Water Pump (Cont'd)
LC-15

steps 4 through 8 until coolant level no longer drops.
IClean excess coolant from engine.
ÐFLUSHING COOLING SYSTEMÐNBMA0011S031. Open air relief plug.
2. Fill radiator with water until water spills from the air relief holes,
then close air relief plugs. Fill radiator and reservoir tank with
water and reinstall radiator cap.
3. Run engine and warm it up to normal operating temperature.
4. Rev engine two or three times under no-load.
5. Stop engine and wait until it cools down.
6. Drain water.
7. Repeat steps 1 through 6 until clear water begins to drain from
radiator.
SMA803A
Checking Fuel LinesNBMA0012Inspect fuel lines and tank for improper attachment, leaks, cracks,
damage, loose connections, chafing or deterioration.
If necessary, repair or replace faulty parts.
MMA104A
CAUTION:
Tighten high-pressure rubber hose clamp so that clamp end is
3 mm (0.12 in) from hose end.
Tightening torque specifications are the same for all rubber
hose clamps.
Ensure that screw does not contact adjacent parts.
SEF214Y
Changing Fuel FilterNBMA0013WARNING:
Before removing fuel filter, release fuel pressure from fuel line.
WITH CONSULT-IINBMA0013S011. Turn ignition switch ªONº.
2. Perform ªFUEL PRESSURE RELEASEº in ªWORK SUP-
PORTº mode with CONSULT-II.
3. Start engine.
4. After engine stalls, crank engine two or three times to release
all fuel pressure.
ENGINE MAINTENANCE
Changing Engine Coolant (Cont'd)
MA-16

SMA211A
Checking Exhaust SystemNBMA0019Check exhaust pipes, muffler and mounting for improper
attachment, leaks, cracks, damage, loose connections, chafing or
deterioration.
SMA121D
Checking A/T FluidNBMA00201. Warm up engine.
2. Check for fluid leakage.
3. Before driving, fluid level can be checked at fluid temperatures
of 30 to 50ÉC (86 to 122ÉF) using ªCOLDº range on dipstick.
a. Park vehicle on level surface and set parking brake.
b. Start engine and move selector lever through each gear posi-
tion. Leave selector lever in ªPº position.
c. Check fluid level with engine idling.
d. Remove dipstick and note reading. If level is at low side of
either range, and fluid to the charging pipe.
e. Re-insert dipstick into charging pipe as far as it will go.
f. Remove dipstick and note reading. If reading is at low side of
range, add fluid to the charging pipe.
Do not overfill.
4. Drive vehicle for approximately 5 minutes in urban areas.
5. Re-check fluid level at fluid temperatures of 50 to 80ÉC (122
to 176ÉF) using ªHOTº range on dipstick.
SMA853B
6. Check fluid condition.
IIf fluid is very dark or smells burned, refer to AT section for
checking operation of A/T. Flush cooling system after repair of
A/T.
IIf A/T fluid contains frictional material (clutches, bands, etc.),
replace radiator and flush cooler line using cleaning solvent
and compressed air after repair of A/T. Refer to LC-19, ªRadia-
torº.
SMA515C
Changing A/T FluidNBMA00211. Warm up A/T fluid.
2. Stop engine.
3. Drain A/T fluid from drain plug and refill with new A/T fluid.
Always refill same volume with drained fluid.
Fluid grade:
Nissan Matic ªDº (Continental U.S. and Alaska) or
Canada NISSAN Automatic Transmission Fluid.
Refer to ªRECOMMENDED FLUIDS AND
LUBRICANTSº, MA-11.
Fluid capacity (With torque converter):
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CHASSIS AND BODY MAINTENANCE
Checking Exhaust System
MA-21

CAUTION:
Do not hold the steering wheel in a locked position for more
than 15 seconds.
4. If fluid leakage at connectors is noticed, loosen flare nut and
then retighten.
Do not overtighten connector as this can damage O-ring,
washer and connector.
5. Check rack boots for accumulation of power steering fluid.
Bleeding Hydraulic SystemNBST00131. Raise front end of vehicle until wheels are clear of the ground.
2. Add fluid into oil tank to specified level. Then, quickly turn
steering wheel fully to right and left and lightly touch steering
stoppers.
Repeat steering wheel operation until fluid level no longer
decreases.
3. Start engine.
Repeat step 2 above.
IIncomplete air bleeding will cause the following to occur. When
this happens, bleed air again.
a) Air bubbles in reservoir tank
b) Clicking noise in oil pump
c) Excessive buzzing in oil pump
Fluid noise may occur in the valve or oil pump. This is common
when the vehicle is stationary or while turning steering wheel
slowly. This does not affect performance or durability of the system.
SST491B
SST090B
Checking Steering Wheel Turning ForceNBST00141. Park vehicle on a level, dry surface and set parking brake.
2. Start engine.
3. Bring power steering fluid up to adequate operating tempera-
ture. [Make sure temperature of fluid is approximately 60 to
80ÉC (140 to 176ÉF).]
Tires need to be inflated to normal pressure.
4. Check steering wheel turning force when steering wheel has
been turned 360É from the neutral position.
Steering wheel turning force:
39 N (4 kg, 9 lb) or less
5. If steering wheel turning force is out of specification, check
rack sliding force.
a. Disconnect steering column lower joint and knuckle arms from
the gear.
b. Start and run engine at idle to make sure steering fluid has
reached normal operating temperature.
c. Pull tie-rod slowly to move it from neutral position to±11.5 mm
(±0.453 in) at speed of 3.5 mm (0.138 in)/s. Check that rack
sliding force is within specification.
Rack sliding force:
137 - 255 N (14 - 26 kg, 31 - 57 lb)
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ON-VEHICLE SERVICE
Checking Fluid Leakage (Cont'd)
ST-9

SST718CA
6. Move rack over its entire stroke several times.
7. Measure pinion rotating torque within the range of 180É from
neutral position.
Stop the gear at the point of maximum torque.
8. Loosen adjusting screw, then retighten it to 4.9 to 5.9 N´m (50
to 60 kg-cm, 43 to 52 in-lb).
9. Loosen adjusting screw by 10É to 20É.
SST940C
10. Prevent adjusting screw from turning, and tighten lock nut to
specified torque.
SST718CA
11. Measure pinion rotating torque.
Lock to lock:
Average rotating torque
0.78 - 1.47 N´m (8.0 - 15.0 kg-cm, 6.9 - 13.0 in-lb)
Within±100É from the neutral position:
Maximum torque variation
0.4 N´m (4 kg-cm, 3.5 in-lb)
Outside the above range:
Maximum force variation
0.6 N´m (6 kg-cm, 5.2 in-lb)
IIf pinion rotating torque is not within specifications, readjust it
starting from step 4. If pinion rotating torque is still out of
specifications after readjustment, replace steering gear
assembly.
SST090B
12. Check rack sliding force on vehicle as follows:
a. Install steering gear onto vehicle, but do not connect tie-rod to
knuckle arm.
b. Connect all piping and fill with steering fluid.
c. Start engine and bleed air completely.
d. Disconnect steering column lower joint from the gear.
e. Keep engine at idle and make sure steering fluid has reached
normal operating temperature.
f. Pull tie-rod slowly to move it from neutral position to±11.5 mm
(±0.453 in) at speed of 3.5 mm (0.138 in)/s. Check that rack
sliding force is within specification.
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POWER STEERING GEAR AND LINKAGE
Adjustment (Cont'd)
ST-25