2003 NISSAN X-TRAIL air bleeding

BR-1
BRAKE SYSTEM
F BRAKES
CONTENTS
C
D
E
G
H
I
J
K
L
M
SECTION
A
B
BR

BRAKE SYSTEM
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for Brake System .................................. 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tools ........................................ 4
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 5
NVH Troubleshooting Chart ..................................... 5
BRAKE PEDAL .......................................................... 6
On-Vehicle Inspection and Adjustment .................... 6
Components ............................................................. 7
Removal and Installation .......................................... 7
REMOVAL ............................................................. 7
INSPECTION AFTER REMOVAL ......................... 7
INSTALLATION ..................................................... 7
BRAKE FLUID ............................................................ 8
Checking Brake Fluid Level ..................................... 8
Checking Brake Line ................................................ 8
Changing Brake Fluid ............................................... 8
Bleeding Brake System ............................................ 9
BRAKE PIPING AND HOSE .................................... 10
Hydraulic Piping ..................................................... 10
Removal and Installation of Front Brake Piping and
Brake Hose ............................................................. 11
REMOVAL ............................................................ 11
INSTALLATION ................................................... 12
Removal and Installation of Rear Brake Piping and
Brake Hose ............................................................ 12
REMOVAL ........................................................... 12
INSTALLATION ................................................... 12
Inspection ............................................................... 13
BRAKE MASTER CYLINDER .................................. 14
Components ........................................................... 14
Removal and Installation ........................................ 14
REMOVAL ........................................................... 14INSTALLATION ................................................... 14
Disassembly and Assembly .................................... 15
MODELS WITHOUT ESP (PISTON STOPPER
APPLIED.) ........................................................... 15
MODELS WITHOUT ESP (PISTON STOPPER
NOT APPLIED.) .................................................. 17
MODELS WITH ESP ........................................... 19
BRAKE BOOSTER ................................................... 23
On-Vehicle Inspection and Service ......................... 23
FUNCTION INSPECTION ................................... 23
AIRTIGHTNESS INSPECTION ........................... 23
Removal and Installation ........................................ 23
REMOVAL ........................................................... 23
INSPECTION AFTER REMOVAL ....................... 24
INSTALLATION ................................................... 24
VACUUM LINES ....................................................... 25
Removal and Installation ........................................ 25
Inspection ............................................................... 26
VISUAL INSPECTION ......................................... 26
CHECK VALVE INSPECTION ............................. 26
FRONT DISC BRAKE ............................................... 27
Component ............................................................. 27
Inspection ............................................................... 27
PAD THICKNESS ................................................ 27
Pad Replacement ................................................... 28
REMOVAL ........................................................... 28
INSTALLATION ................................................... 28
Caliper Removal and Installation ............................ 28
REMOVAL ........................................................... 28
INSTALLATION ................................................... 29
Caliper Disassembly and Assembly ....................... 29
DISASSEMBLY ................................................... 29
INSPECTION AFTER DISASSEMBLY ................ 29
DISC ROTOR INSPECTION ............................... 30
ASSEMBLY ......................................................... 30
BRAKE BURNISHING PROCEDURE ................. 31
REAR DISC BRAKE ................................................. 32
Component ............................................................. 32
Inspection ............................................................... 32
PAD WEAR INSPECTION ................................... 32

BRAKE FLUID
BR-9
C
D
E
G
H
I
J
K
L
MA
B
BR

4. Be sure there is no foreign material in reservoir tank. Refill with
new brake fluid.
5. Connect a vinyl tube to bleed valve.
6. Rest foot on brake pedal. Loosen bleed valve. Slowly depress
pedal until it stops. Tighten bleed valve. Release brake pedal.
Repeat this process a few times at 2-3 second intervals until
new brake fluid flows out.
For bleeding procedure. Refer to BR-9, "
Bleeding Brake Sys-
tem" .
Bleeding Brake SystemEFS000C4
CAUTION:

Carefully monitor brake fluid level at master cylinder during bleeding operation.

Fill reservoir with new brake fluid “DOT 3” or “DOT 4”. Make sure it is full at all times while bleed-
ing air out of system.

Place a container under master cylinder to avoid spillage of brake fluid.

While bleeding, pay attention to master cylinder fluid level.

For models with ABS, turn ignition switch OFF and disconnect ABS actuator connectors or bat-
tery ground cable.

Bleed air in the following order.
Right rear brake, left front brake, left rear brake, right front brake
1. Turn OFF ignition switch. Remove ABS actuator connector.
2. Connect a vinyl tube to bleed valve.
3. Fully depress the brake pedal 4 to 5 times.
4. With brake pedal depressed, loosen air bleeder and bleed air.
5. Close bleed valve.
6. Slowly release brake pedal.
7. Tighten bleed valve to the specified torque.
8. Repeat steps 2 - 7. Occasionally refill master cylinder reservoir tank. Be sure to keep it at least half-full.
BRA0006D
: 6.9 - 8.8 N·m (0.7 - 0.9 kg-m, 61- 78 in-lb)

BR-24
BRAKE BOOSTER

INSPECTION AFTER REMOVAL
Output rod length inspection
1. Using a handy vacuum pump, apply a vacuum of -66.7 kPa (-500 mmHg, -19.69 inHg) to the brake
booster.
2. Check output rod length.
3.
INSTALLATION
1. Loosen lock nut to adjust input rod length so that length “B” (in
the figure) satisfies the specified value.
2. After adjusting “B”, temporarily tighten lock nut to install booster
assembly to vehicle.
3. Connect brake pedal to input rod clevis.
4. Connect brake pedal assembly mounting nuts and tighten to the
specified torque.
5. Connect master cylinder to booster assembly.
6. Adjust brake pedal height and play.
7. Tighten input rod lock nut to the specified torque.
8. Bleed air. Refer to BR-9, "
Bleeding Brake System" . Reference value at vacuum of –66.7 kPa (–500 mmHg,
–19.69 inHg):
Without ESP models : 10.4 mm (0.409 in)
With ESP models : -6.2 mm (-0.244 in)
SBR208E
Length “B” standard : 125 mm (4.92 in)
SGIA0060E

FRONT DISC BRAKE
BR-29
C
D
E
G
H
I
J
K
L
MA
B
BR

INSTALLATION
CAUTION:

Refill with new brake fluid “DOT 3” or “DOT 4”.

Never reuse drained brake fluid.
1. Install disc rotor.
2. Install caliper assembly. Tighten mounting bolts to the specified torque.
CAUTION:
Before installing caliper assembly, wipe brake fluid and grease on steering knuckle washer seats
and caliper assembly mounting surface.
3. Connect brake hose to caliper assembly and tighten union bolts to the specified torque.
CAUTION:

Do not reuse copper washer for union bolts.

Securely assemble brake hose to protrusions on cylinder body.
4. Bleed air. Refer to BR-9, "
Bleeding Brake System" .
Caliper Disassembly and Assembly EFS000CK
DISASSEMBLY
WARNING:
Be careful not to pinch your fingers in the piston.
CAUTION:
Be careful not to damage the cylinder inner wall.
1. Place a wooden block as shown in the figure. Blow air into union
bolt mounting hole to remove pistons and piston boots.
2. Using flat-bladed screwdriver, remove piston seals.
INSPECTION AFTER DISASSEMBLY
Cylinder Body
CAUTION:
Use new brake fluid to clean. Never use mineral oils such as gasoline or kerosene.

Check cylinder inner wall for corrosion, wear and damage. If corrosion, wear or damage is detected,
replace the cylinder body.

Minor flaws caused by corrosion or foreign material can be removed by polishing the surface with fine
sandpaper. Replace the cylinder body, if necessary.
To r q u e M e m b e r
Check for wear, cracks and damage. If wear, cracks or damage is detected, replace the applicable part.
BRB0032D
SFIA0141E

BR-34
REAR DISC BRAKE

Caliper Removal and InstallationEFS00180
REMOVAL
1. Connect a vinyl tube to bleed valve.
2. Drain brake fluid gradually from bleed valve while depressing
brake pedal.
3. Remove union bolt and remove brake hose from caliper assem-
bly.
4. Remove union bolts and torque member mounting bolts, and
remove caliper assembly.
5. Remove disc rotor.
INSTALLATION
CAUTION:

Refill with new brake fluid “DOT 3 or DOT 4”.

Never reuse drained brake fluid.
1. Install disc rotor.
2. Install caliper assembly. Tighten mounting bolts to the specified torque.
CAUTION:
Wipe brake fluid and grease on axle assembly washer seats and caliper assembly mounting sur-
face. Install caliper assembly.
3. Connect brake hose to caliper assembly and tighten union bolts to the specified torque.
CAUTION:

Do not reuse the copper washer for union bolts.

Securely assemble brake hose to protrusions on cylinder body.
4. Bleed air. Refer to BR-9, "
Bleeding Brake System" .
Caliper Disassembly and AssemblyEFS00181
DISASSEMBLY
WARNING:
Be careful not to pinch your fingers in the piston.
CAUTION:
Be careful not to damage the cylinder inner wall.
1. Remove caliper assembly from vehicle.
2. Remove sliding pin from cylinder body. Then remove pads, shims, shim covers, and pad retainers from
caliper assembly.
3. Remove sliding pin boots from torque member.
4. Using flat-bladed screwdriver (as shown in the figure), remove
retaining ring.
SFIA0143E
SBR028A

REAR DISC BRAKE
BR-37
C
D
E
G
H
I
J
K
L
MA
B
BR

4. Fix piston boot with retaining ring.
CAUTION:

Be sure boot is securely engaged in groove on cylinder
body.

Do not reuse retaining ring.
5. Install sliding pins and sliding pin boots to torque member.
6. Install torque member to axle assembly and tighten mounting
bolts to the specified torque.
CAUTION:
Wipe brake fluid and grease on axle assembly washer seats
and torque member mounting surface. Install torque member to
axle assembly.
7. Install pads, pad retainers, shims, and shim covers to torque member and assemble cylinder body.
8. Tighten sliding pin bolts to the specified torque.
9. Connect brake hose to caliper assembly and tighten union bolts to the specified torque.
CAUTION:
Do not reuse union bolt copper washer.
10. After installing caliper assembly, refill with new brake fluid and bleed air. Refer to BR-9, "
Bleeding Brake
System"
SFIA0158E

TROUBLE DIAGNOSIS
BRC-43
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Symptom 2: Unexpected Pedal ReactionEFS004HK
1. CHECK BRAKE PEDAL STROKE
Check brake pedal stroke. Refer to BR-6, "
On-Vehicle Inspection and Adjustment" .
Is the stroke too large?
YES >>
Bleed air from the brake piping. Refer to BR-9, "Bleeding Brake System" .

Check brake pedal, brake booster, and master cylinder for mount play, looseness, brake sys-
tem fluid leakage, etc. Repair if necessary. Refer to Brake pedal: BR-7, "
Components" , brake
booster and master cylinder: BR-23, "
Removal and Installation" .
NO >> GO TO 2.
2. PERFORMANCE CHECK
Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. Check if braking force is
normal in this condition. Connect connector after inspection.
OK or NG
OK >> GO TO 3. Wheel Sensor Inspection in BRC-42, "Symptom 1: ABS Works Frequently" .
NG >> Check brake system.
Symptom 3: Longer Stopping DistanceEFS004HL
CAUTION:
The stopping distance on slippery road surfaces might be longer with the ABS operating than when
the ABS is not operating.
1. PERFORMANCE CHECK
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS.
In this condition, check stopping distance. After inspection, connect connector.
OK or NG
OK >> GO TO BRC-42, "Symptom 1: ABS Works Frequently" .
NG >>

Bleed air from the brake piping. Refer to BR-9, "Bleeding Brake System" .

Check brake system.

BRC-48
[ABS]
ABS ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)

ABS ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)PFP:47660
Removal and InstallationEFS004GT

The above figure shows RH model. LH model figure is the mirror image.

Pay attention to the following when removing actuator.
CAUTION:

Before servicing, disconnect battery terminals.

To remove brake tube, use flare nut wrench to prevent flare nuts and brake tube from being dam-
aged. To install, use flare nut torque wrench (special service tool).

Do not apply excessive impact to actuator, such as dropping it.

Do not remove and install ABS actuator and electric unit (control unit) by holding harness.

After work is completed, bleed air from brake piping. Refer to BR-9, "Bleeding Brake System" .
SFIA1813E