ECU INFINITI QX4 2001 Factory Owner's Manual

SBR116BG
Installation=NBBR0027CAUTION:
IBe careful not to deform or bend brake pipes during instal-
lation of booster.
IReplace clevis pin if damaged.
IRefill with new brake fluid ªDOT 3º.
INever reuse drained brake fluid.
ITake care not to damage brake booster mounting bolt
thread when installing. Due to the narrow angle of
installation, the threads can be damaged by the dash
panel.
1. Before fitting booster, temporarily adjust clevis to dimension
shown.
2. Fit booster, then secure mounting nuts (brake pedal bracket to
brake booster) lightly.
3. Connect brake pedal and booster input rod with clevis pin.
4. Secure mounting nuts.
Specification: 13 - 16 N´m (1.3 - 1.6 kg-m,9-12ft-lb)
5. Install master cylinder. Refer to ªInstallationº in ªMASTER
CYLINDERº, BR-18.
6. Adjust brake pedal height and free play. Refer to ªAdjustmentº
in ªBRAKE PEDAL AND BRACKETº, BR-14.
7. Secure lock nut for clevis.
: 16 - 22 N´m (1.6 - 2.2 kg-m, 12 - 16 ft-lb)
8. Bleed air. Refer to ªBleeding Brake Systemº, BR-8.
BRAKE BOOSTER
Installation
BR-20

SBR085A
DisassemblyNBBR0034WARNING:
Do not place your fingers in front of piston.
CAUTION:
Do not scratch or score cylinder wall.
1. Push out piston with dust seal with compressed air.
2. Remove piston seal with a suitable tool.
InspectionNBBR0035CALIPERNBBR0035S01Cylinder BodyNBBR0035S0101ICheck inside surface of cylinder for score, rust, wear, damage
or presence of foreign objects. If any of the above conditions
are observed, replace cylinder body.
IMinor damage from rust or foreign objects may be eliminated
by polishing surface with a fine emery paper. Replace cylinder
body if necessary.
CAUTION:
Use brake fluid to clean. Never use mineral oil.
PistonNBBR0035S0102Check piston for score, rust, wear, damage or presence of foreign
objects. Replace if any of the above conditions are observed.
CAUTION:
Piston sliding surface is plated. Do not polish with emery
paper even if rust or foreign objects are stuck to sliding sur-
face.
Slide Pin, Pin Bolt and Pin BootNBBR0035S0103Check for wear, cracks, rust or other damage. Replace if any of the
above conditions are observed.
SBR019B
ROTORNBBR0035S02RunoutNBBR0035S02011. Secure rotor to wheel hub with at least two nuts (M12´1.25).
2. Check runout using a dial indicator.
Make sure that wheel bearing axial end play is within the
specifications before measuring. Refer to AX-4, ªFront Wheel
Bearingº.
Maximum runout:
0.1 mm (0.004 in)
3. If the runout is out of specification, find minimum runout posi-
tion as follows:
a. Remove nuts and rotor from wheel hub.
b. Shift the rotor one hole and secure rotor to wheel hub with
nuts.
c. Measure runout.
d. Repeat steps a. to c. so that minimum runout position can be
found.
4. If the runout is still out of specification, turn rotor with on-car
brake lathe (ªMAD, DL-8700º, ªAMMCO 700 and 705º or
equivalent).
FRONT DISC BRAKE
Disassembly
BR-24

SBR020B
ThicknessNBBR0035S0202Thickness variation (At least 8 positions):
Maximum 0.015 mm (0.0006 in)
If thickness variation exceeds the specification, turn rotor with on-
car brake lathe.
Rotor repair limit:
26.0 mm (1.024 in)
SBR574
AssemblyNBBR00361. Insert piston seal into groove on cylinder body.
2. With piston boot fitted to piston, insert piston boot into groove
on cylinder body and install piston.
3. Properly secure piston boot
SBR387D
InstallationNBBR0037CAUTION:
IRefill with new brake fluid ªDOT 3º.
INever reuse drained brake fluid.
1. Install caliper assembly.
2. Install brake hose to caliper securely.
3. Install all parts and secure all bolts.
4. Bleed air. Refer to ªBleeding Brake Systemº, BR-8.
Brake Burnishing ProcedureNBBR0086When experiencing soft brake pedal feel at very low mileage, or
after replacing the rotor, burnish the brake pad contact surfaces
according to the following procedures.
CAUTION:
Only perform this procedure under safe road and traffic con-
ditions. Use extreme caution.
1. Drive the vehicle on a straight smooth road at 50 km/h (31
MPH).
2. Use medium brake pedal/foot effort to bring the vehicle to a
complete stop from 50 km/h (31 MPH). Adjust brake pedal/foot
pressure such that vehicle stopping time equals 3 to 5 sec-
onds.
3. To cool the brake system, drive the vehicle at 50 km/h (31
MPH) for 1 minute without stopping.
4. Repeat steps 1 to 3 10 times or more to complete the burnish-
ing procedure.
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FRONT DISC BRAKE
Inspection (Cont'd)
BR-25

CONSULT-II=NBBR0096CONSULT-II APPLICATION TO ABSNBBR0096S01
ITEMSELF-DIAGNOSTIC
RESULTSDATA MONITOR ACTIVE TEST
Front right wheel sensor´´Ð
Front left wheel sensor´´Ð
Rear right wheel sensor´´Ð
Rear left wheel sensor´´Ð
G switch (G sensor)H´´´
ABS sensor´ÐÐ
Stop lamp switch дÐ
Front right inlet solenoid valve´´´
Front right outlet solenoid valve´´´
Front left inlet solenoid valve´´´
Front left outlet solenoid valve´´´
Rear inlet solenoid valve´´´
Rear outlet solenoid valve´´´
Actuator solenoid valve relay´´Ð
Actuator motor relay
(ABS MOTOR is shown on the Data Monitor
screen.)´´´
ABS warning lamp дÐ
Battery voltage´´Ð
Control unit´ÐÐ
ABS operating signal д´
´: Applicable
Ð: Not applicable
H: 4WD models only
ECU (ABS CONTROL UNIT) PART NUMBER MODENBBR0096S02Ignore the ECU part number displayed in the ECU PART NUMBER MODE. Refer to parts catalog to order
the ECU.
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONABS
CONSULT-II
BR-43

DUPLICATE THE NOISE AND TEST DRIVENBBT0024S02If possible, drive the vehicle with the customer until the noise is duplicated. Note any additional information on
the Diagnostic Worksheet regarding the conditions or location of the noise. This information can be used to
duplicate the same conditions when you confirm the repair.
If the noise can be duplicated easily during the test drive, to help identify the source of the noise, try to dupli-
cate the noise with the vehicle stopped by doing one or all of the following:
1) Close a door.
2) Tap or push/pull around the area where the noise appears to be coming from.
3) Rev the engine.
4) Use a floor jack to recreate vehicle ªtwistº.
5) At idle, apply engine load (electrical load, half-clutch on M/T model, drive position on A/T model).
6) Raise the vehicle on a hoist and hit a tire with a rubber hammer.
IDrive the vehicle and attempt to duplicate the conditions the customer states exist when the noise occurs.
IIf it is difficult to duplicate the noise, drive the vehicle slowly on an undulating or rough road to stress the
vehicle body.
CHECK RELATED SERVICE BULLETINSNBBT0024S03After verifying the customer concern or symptom, check ASIST for Technical Service Bulletins (TSBs) related
to that concern or symptom.
If a TSB relates to the symptom, follow the procedure to repair the noise.
LOCATE THE NOISE AND IDENTIFY THE ROOT CAUSENBBT0024S041. Narrow down the noise to a general area. To help pinpoint the source of the noise, use a listening tool
(Chassis Ear: J-39570, Engine Ear: J-39565 and mechanics stethoscope).
2. Narrow down the noise to a more specific area and identify the cause of the noise by:
Iremoving the components in the area that you suspect the noise is coming from.
Do not use too much force when removing clips and fasteners, otherwise clips and fastener can
be broken or lost during the repair, resulting in the creation of new noise.
Itapping or pushing/pulling the component that you suspect is causing the noise.
Do not tap or push/pull the component with excessive force, otherwise the noise will be eliminated
only temporarily.
Ifeeling for a vibration with your hand by touching the component(s) that you suspect is (are) causing the
noise.
Iplacing a piece of paper between components that you suspect are causing the noise.
Ilooking for loose components and contact marks.
Refer to ªGeneric Squeak and Rattle Troubleshootingº, BT-6.
REPAIR THE CAUSENBBT0024S05IIf the cause is a loose component, tighten the component securely.
IIf the cause is insufficient clearance between components:
þ separate components by repositioning or loosening and retightening the component, if possible.
þ insulate components with a suitable insulator such as urethane pads, foam blocks, felt cloth tape or ure-
thane tape. A Nissan Squeak and Rattle Kit (J-43980) is available through your authorized Nissan Parts
Department.
CAUTION:
Do not use excessive force as many components are constructed of plastic and may be damaged.
Always check with the Parts Department for the latest parts information.
The following materials are contained in the Nissan Squeak and Rattle Kit (J-43980). Each item can be ordered
separately as needed.
URETHANE PADS [1.5 mm (0.059 in) thick]
Insulates connectors, harness, etc.
76268-9E005: 100 x 135 mm (3.94 x 5.31 in)/76884-71L01: 60 x 85 mm (2.36 x 3.35 in)/76884-71L02: 15 x
25 mm (0.59 x 0.98 in)
INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.
73982-9E000: 45 mm (1.77 in) thick, 50 x 50 mm (1.97 x 1.97 in)/73982-50Y00: 10 mm (0.39 in) thick, 50 x
50 mm (1.97 x 1.97 in)
INSULATOR (Light foam block)
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SQUEAK AND RATTLE TROUBLE DIAGNOSES
Work Flow (Cont'd)
BT-5

TRUNK=NBBT0025S04Trunk noises are often caused by a loose jack or loose items put into the trunk by the owner.
In addition look for:
1. Trunk lid bumpers out of adjustment
2. Trunk lid striker out of adjustment
3. The trunk lid torsion bars knocking together
4. A loose license plate or bracket
Most of these incidents can be repaired by adjusting, securing or insulating the item(s) or component(s) caus-
ing the noise.
SUNROOF/HEADLINERNBBT0025S05Noises in the sunroof/headliner area can often be traced to one of the following:
1. Sunroof lid, rail, linkage or seals making a rattle or light knocking noise
2. Sunvisor shaft shaking in the holder
3. Front or rear windshield touching headliner and squeaking
Again, pressing on the components to stop the noise while duplicating the conditions can isolate most of these
incidents. Repairs usually consist of insulating with felt cloth tape.
SEATSNBBT0025S06When isolating seat noises it's important to note the position the seat is in and the load placed on the seat
when the noise is present. These conditions should be duplicated when verifying and isolating the cause of
the noise.
Cause of seat noise include:
1. Headrest rods and holders
2. A squeak between the seat pad cushion and frame
3. The rear seat back lock and bracket
These noises can be isolated by moving or pressing on the suspected components while duplicating the con-
ditions under which the noise occurs. Most of these incidents can be repaired by repositioning the component
or applying urethane tape to the contact area.
UNDERHOODNBBT0025S07Some interior noises may be caused by components under the hood or on the engine wall. The noise is then
transmitted into the passenger compartment.
Causes of transmitted underhood noises include:
1. Any component mounted to the engine wall
2. Components that pass through the engine wall
3. Engine wall mounts and connectors
4. Loose radiator mounting pins
5. Hood bumpers out of adjustment
6. Hood striker out of adjustment
These noises can be difficult to isolate since they cannot be reached from the interior of the vehicle. The best
method is to secure, move or insulate one component at a time and test drive the vehicle. Also, engine RPM
or load can be changed to isolate the noise. Repairs can usually be made by moving, adjusting, securing, or
insulating the component causing the noise.
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SQUEAK AND RATTLE TROUBLE DIAGNOSES
Generic Squeak and Rattle Troubleshooting (Cont'd)
BT-7

Removal and InstallationNBBT0004IWhen removing or installing hood, place a cloth or other padding on front fender panel and cowl top. This
prevents vehicle body from being scratched.
IBumper fascia is made of plastic. Do not use excessive force and be sure to keep oil away from it.
IHood adjustment: Adjust at hinge portion.
IHood lock adjustment: After adjusting, check hood lock control operation. Apply a coat of grease to hood
locks engaging mechanism.
IHood opener: Do not attempt to bend cable forcibly. Doing so increases effort required to unlock hood.
FRONT BUMPER ASSEMBLYNBBT0004S011. Remove screws and clips securing left and right sides of front fender protector.
2. Remove clips securing bumper fascia to radiator core support lower.
3. Remove clips securing radiator grille and remove the radiator grille.
4. Remove finisher and bolts securing left and right fog lamps and remove the lamps.
5. Remove bolts securing left and right radiator grille and remove the radiator grilles.
6. Remove bolts securing license plate bracket and remove the license plate bracket.
7. Remove clips securing bumper fascia to bumper reinforcement.
8. Remove bolts securing front fender to bumper fascia.
9. Extract bumper fascia assembly.
10. Remove bolts and nuts securing bumper reinforcement.
11. Extract bumper reinforcement.
SBT022A
BODY FRONT END
Removal and Installation
BT-12

Removal and InstallationNBBT0005IBumper fascia is made of plastic. Do not use excessive force and be sure to keep oil away from it.
IBack door lock system adjustment: Adjust lock & striker so that they are in the center.
After adjustment, check back door lock operation.
IBack door hatch lock system adjustment: Adjust lock & striker so that they are in the center.
After adjustment, check back door hatch lock operation.
WARNING:
IBe careful not to scratch back door stay and/or back door hatch stay when installing back door
and/or back door hatch. A scratched stay may cause gas leakage.
IThe contents of the back door stay and back door hatch stay are under pressure. Do not take apart,
puncture, apply heat or allow fire near them.
REAR BUMPER ASSEMBLYNBBT0005S011. Remove bolts and screws securing left and right mudguards and remove the mudguards.
2. Remove clips and screws securing left and right sides of wheel protector.
3. Remove clips and bolts securing left and right rear fenders to bumper fascia.
4. Remove bolts securing bumper reinforcement to bumper fascia.
5. Remove clips securing bumper fascia.
6. Extract bumper fascia assembly.
7. Remove bolts and nuts securing bumper reinforcement.
8. Extract bumper reinforcement.
SBT715
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BODY REAR END AND OPENER
Removal and Installation
BT-15

SBT035A
Defroster grille
REMOVAL
Insert a cloth-covered flat-bladed screwdriver into the grilles of the
outside, center and central grilles, respectively, lift up the front of
the grilles and remove.
INSTALLATION
After inserting the front section, insert the rear section (pawls) to
attach.
CAUTION:
Confirm that the pawls at the rear are securely attached.
SBT036A
Side ventilator-left
Insert a cloth-covered flat-bladed screwdriver into the lower
section, and pull out forward.
SBT037A
Side ventilator-right
Insert a cloth-covered flat-bladed screwdriver into the corner of the
lower section, and pull out forward. (Securely press the screwdriver
against the ventilator.) Or, after removing the instrument lower
panel, push the ventilator out from the back.
Side defroster grille
After removing the side ventilator, reach in with hands from the
opening, push on the pawls from behind the grille, and remove by
pushing out.
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INSTRUMENT PANEL ASSEMBLY
Removal and Installation (Cont'd)
BT-27

Removal and InstallationNBBT0010Front Door Trim
1. Remove inside handle escutcheon.
2. Remove power window switch, then disconnect the connectors.
3. Remove door armrest.
4. Remove bolts securing door finisher.
5. Pull on door finisher to remove clips from door panel and remove door finisher, then disconnect glass hatch
and fuel lid opener switch connector.
Rear Door Trim
6. Remove inside handle escutcheon.
7. Remove power window switch, then disconnect the connector.
8. Remove door armrest cap.
9. Remove bolts securing door finisher.
10. Pull on door finisher to remove clips from door panel and remove door finisher.
SBT696
DOOR TRIM
Removal and Installation
BT-30