2001 INFINITI QX4 INSTALLATION

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

SBR382D
Vacuum HoseNBBR0028
SBR225B
Removal and InstallationNBBR0029CAUTION:
When installing vacuum hoses, pay attention to the following
points.
IDo not apply any oil or lubricants to vacuum hose and
check valve.
IInsert vacuum tube into vacuum hose as shown.
SBR498A
IInstall check valve, paying attention to its direction.
InspectionNBBR0030HOSES AND CONNECTORSNBBR0030S01Check vacuum lines, connections and check valve for airtightness,
improper attachment chafing and deterioration.
SBR943A
CHECK VALVENBBR0030S02Check vacuum with a vacuum pump.
Connect to booster side Vacuum should exist.
Connect to engine side Vacuum should not exist.
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VACUUM PIPING
Vacuum Hose
BR-21

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

SBR215B
Wheel Cylinder OverhaulNBBR0041ICheck all internal parts for wear, rust and damage. Replace if
necessary.
IPay attention so as not to scratch cylinder when installing pis-
tons.
SBR095A
InspectionNBBR0042DRUMNBBR0042S01Maximum inner diameter: 296.5 mm (11.67 in)
Out-of-roundness: 0.03 mm (0.0012 in) or less
IContact surface should be fine finished with No. 120 to 150
emery paper.
IUsing a drum lathe, lathe brake drum if it shows scoring, par-
tial wear or stepped wear.
IAfter brake drum has been completely reconditioned or
replaced, check drum and shoes for proper contact pattern.
SBR021A
LININGNBBR0042S02Check lining thickness.
Standard lining thickness:
6.1 mm (0.240 in)
Lining wear limit (A):
1.5 mm (0.059 in)
SBR092B
InstallationNBBR0043Always perform shoe clearance adjustment. Refer to BR-31.
1. Fit toggle lever to brake shoe (trailing side) with retainer ring.
ABR371
2. Apply brake grease to the contact areas (indicated by arrows
and hatching) shown at left.
REAR DRUM BRAKE
Wheel Cylinder Overhaul
BR-28

SBR217B
3. Shorten adjuster by rotating it.
IPay attention to direction of adjuster.
Wheel Screw Depression
Left Left-hand thread Yes
Right Right-hand thread No
SBR279B
4. Connect parking brake cable to toggle lever.
5. Install all parts.
Be careful not to damage wheel cylinder piston boots.
6. Check all parts are installed properly.
Pay attention to direction of adjuster assembly.
7. Install brake drum.
8. When installing new wheel cylinder or overhauling wheel
cylinder, bleed air. Refer to ªBleeding Brake Systemº, BR-8.
9. Adjust parking brake. Refer to ªAdjustmentº, ªPARKING
BRAKE CONTROLº, BR-31.
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REAR DRUM BRAKE
Installation (Cont'd)
BR-29

ComponentsNBBR0044
SBR667E
SBR390D
Removal and InstallationNBBR00451. To remove parking brake cable, first remove center console.
2. Disconnect warning lamp connector.
3. Remove bolts, slacken off and remove adjusting nut.
SBR391D
4. Disconnect cable. Refer to ªRemovalº, ªREAR DRUM BRAKEº,
BR-26.
InspectionNBBR00461. Check control lever for wear or other damage. Replace if nec-
essary.
2. Check wires for discontinuity or deterioration. Replace if nec-
essary.
3. Check warning lamp and switch. Replace if necessary.
4. Check parts at each connecting portion and, if deformed or
damaged, replace.
PARKING BRAKE CONTROL
Components
BR-30

SELF-DIAGNOSTIC RESULTS MODENBBR0097S02
Diagnostic item Diagnostic item is detected when ... Reference Page
FR RH SENSOR*1
[OPEN]ICircuit for front right wheel sensor is open.
(An abnormally high input voltage is entered.)BR-56
FR LH SENSOR*1
[OPEN]ICircuit for front left wheel sensor is open.
(An abnormally high input voltage is entered.)BR-56
RR RH SENSOR*1
[OPEN]ICircuit for rear right sensor is open.
(An abnormally high input voltage is entered.)BR-56
RR LH SENSOR*1
[OPEN]ICircuit for rear left sensor is open.
(An abnormally high input voltage is entered.)BR-56
FR RH SENSOR*1
[SHORT]ICircuit for front right wheel sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
FR LH SENSOR*1
[SHORT]ICircuit for front left wheel sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
RR RH SENSOR*1
[SHORT]ICircuit for rear right sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
RR LH SENSOR*1
[SHORT]ICircuit for rear left sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
ABS SENSOR*1
[ABNORMAL SIGNAL]ITeeth damage on sensor rotor or improper installation of wheel sensor.
(Abnormal wheel sensor signal is entered.)BR-56
FR RH IN ABS SOL
[OPEN, SHORT]ICircuit for front right inlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
FR LH IN ABS SOL
[OPEN, SHORT]ICircuit for front left inlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
FR RH OUT ABS SOL
[OPEN, SHORT]ICircuit for front right outlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
FR LH OUT ABS SOL
[OPEN, SHORT]ICircuit for front left outlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
RR IN ABS SOL
[OPEN, SHORT]ICircuit for rear inlet solenoid valve is shorted.
(An abnormally high output voltage is entered.)BR-59
RR OUT ABS SOL
[OPEN, SHORT]ICircuit for rear out solenoid valve is shorted.
(An abnormally high output voltage is entered.)BR-59
ABS ACTUATOR RELAY
[ABNORMAL]IActuator solenoid valve relay is ON, even if control unit sends off signal.
IActuator solenoid valve relay is OFF, even if control unit sends on signal.BR-59
ABS MOTOR RELAY
[ABNORMAL]ICircuit for ABS motor relay is open or shorted.
ICircuit for actuator motor is open or shorted.
IActuator motor relay is stuck.BR-61
BATTERY VOLT
[VB-LOW]IPower source voltage supplied to ABS control unit is abnormally low.
BR-63
CONTROL UNITIFunction of calculation in ABS control unit has failed. BR-68
G SENSOR*2
[ABNORMAL]IG sensor circuit is open or shorted.
BR-65
*1: If one or more wheels spin on a rough or slippery road for 40 seconds or more, the ABS warning lamp will illuminate. This does not
indicate a malfunction. Only in the case of the short-circuit (Code Nos. 26, 22, 32 and 36), after repair the ABS warning lamp also illu-
minates when the ignition switch is turned ON. In this case, drive the vehicle at speeds greater than 30 km/h (19 MPH) for approxi-
mately 1 minute as specified in ªSELF-DIAGNOSIS PROCEDUREº, BR-41. Check to ensure that the ABS warning lamp goes out while
the vehicle is being driven.
*2: 4WD models onlyGI
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONABS
CONSULT-II Inspection Procedure (Cont'd)
BR-45

=NBBR0079
CAUTION:
Be careful not to damage sensor edge and sensor rotor teeth.
When removing the front or rear wheel hub assembly, discon-
nect the ABS wheel sensor from the assembly and move it
away.
Front Wheel SensorNBBR0079S01
SBR398D
Rear Wheel SensorNBBR0079S02
SBR399D
REMOVAL AND INSTALLATIONABS
BR-80