abs NISSAN ALMERA N15 1995 User Guide

CONTROLVALVE
Proportioning Valve
INSPECTION
CAUTION:
• Carefully monitorbrakefluidlevel atmaster cylinder.
• Use new brake fluid"DOT 3"or"DOT 4".
• Donot mix different typesofbrake fluids(DOT3,DOT 4).
• Becareful nottosplash brakefluidonpainted areas;itmay
cause paintdamage. Ifbrake fluidissplashed onpaint
areas, washitaway withwater immediately.
• Depress pedalslowly whenraising frontbrake pressure.
• Check rearbrake pressure 2seconds afterfront brake pres-
sure reaches specified value.
• For models withABS disconnect harnessconnectors from
ABS actuator relaybefore checking.

1.
Connect Tooltoair bleeders offront andrear brakes on
either
LH
or
RH
side.
2. Bleed airfrom theTool.
3. Check rearbrake pressure bydepressing brakepedal
(increasing frontbrake pressure).

Unit:kPa(bar, kg/cm
2,
psi)

Without ABS
I
With
ABS
Applied models
GA14DE,GA16DE,CD20 GA16DE'
SR20DE
Applied pressure 7.3556.375
5,394
(Front brake) (73.6,
75,1,067) (63.7,65,924)
(53.9,55,782)
3,432 -3,825 2,452-2,844
Output pressure 5,100
-5,492 (34.3-38.2, (245-28.4,
(Rear brake) (51.0
-54.9, 52-56, 739 -796) 35-39, 25-29,
498 -555) 356-412)

*
Models forAustralia

If
output pressure isout ofspecifications, replacedualpro- •••
portioning valve(separated type)ormaster cylinder assem-
bly (built-in type).
4. Bleed airafter disconnecting theTool. Refer to"Bleeding
Procedure", BR-5.

BR-9

MASTERCYLINDER
Removal
CAUTION:
• Becareful nottosplash brakefluidonpainted areas;itmay
cause paintdamage. Ifbrake fluidissplashed onpainted
areas, washitaway withwater immediately.
• Inthe case ofbrake fluidleakage fromthemaster cylinder,
disassemble thecylinder. Thencheck piston cupsfordefor-
mation orscratches andreplace necessary parts.

1. Connect avinyl tubetoair bleeder valve.
2. Drain brake fluidfrom each airbleeder valve,depressing
brake pedaltoempty fluidfrom master cylinder.
3. Remove brakepipeflare nuts.
4. Remove mastercylinder mounting nuts.

Models withASS

/O-ring~

'V
(ModelswithABS only)
'\~ /'Valve stopper

T@" ~
1.5.2.9
(0.15.0.3, 13.0•26.0)

o

l-~

~ 11.7 -14.7 \
(1.2 -1.5, 8.7-10.8)

SBR019DB

Seal~
___
Reservoir tank

jJ'JD~----

~ ..-:'J

C'9 ---
Secondarypiston
Stopper cap~assembly
~f]

Cylinder
body
N.m (kg-m, in-Ib)
N.m (kg-m. ft-Ib)
Brake fluidpoint
Reservoir
cap
----g

Oil strainer ----. ~

L------- -

SEC.
460
Disassembly
1. Bend claws ofstopper capoutward.

BR-12

SBR435B
SBR939A
Secondary piston
Primary piston
SBR012A
Models withABS
Secondary piston
Primary piston

_-rnIJ
SBR221BAMASTER
CYLINDER
Disassembly (Cont'd)

2. Remove valvestopper whilepiston ispushed intocylinder
(Models withASS only).
3. Remove pistonassemblies.

If itis difficult toremove secondary pistonassembly, gradually
apply compressed airthrough fluidoutlet.

4. Draw outreservoir tank.

Inspection

Check master cylinder innerwallforpin holes orscratches.
Replace ifdamaged.

Assembly
1. Insert secondary pistonassembly. Theninsert primary pis-
ton assembly.

• Pay attention todirection ofpiston cupsinfigure atleft.
Also, insert pistons squarely toavoid scratches oncylinder
bore.
• Pay attention toalignment ofsecondary pistonslitwith
valve stopper mounting holeofcylinder body(Formodels
with ABS only).
BR-13
•

SBR435BMASTER
CYLINDER
Assembly (Cont'd)

2. Install stopper cap.
Before installing stoppercap,ensure thatclaws arebent
inward.
3. Push reservoir tankseals intocylinder body.
4. Push reservoir tankintocylinder body.
5. Install valvestopper whilepiston ispushed intocylinder
(Models withABS only).

Installation

CAUTION:
• Refill withnewbrake fluid"DOT 3"or"DOT 4".
• Never reusedrained brakefluid.
• Donot mix different typesofbrake fluids(DOT3,DOT 4).
1. Place master cylinder ontobrake booster andsecure
mounting nutslightly.
2. Torque mounting nuts.
~: 11.7 -14.7 N'm(1.2-1.5 kg-m, 8.7-10.8 ft-Ib)
3. Fillupreservoir tankwith newbrake fluid.
4. Plug allports onmaster cylinder withfingers toprevent air
suction whilereleasing brakepedal.
5. Have driver depress brakepedalslowly several timesuntil
no air comes outofmaster cylinder.
6. Fitbrake linestomaster cylinder.
7. Tighten flarenuts.
~: 15-18 N'm (1.5-1.8 kg-m, 11-13 ft-Ib)
8. Bleed airfrom brake system. Referto"Bleeding
Procedure", BR-6."

BR-14

Approx.125mm (4.92 In) BRAKE
BOOSTER

Inspection

OUTPUT RODLENGTH CHECK

1. Supply brakebooster withvacuum of-66.7 kPa(-667 mbar,
-500 mmHg, -19.69inHg)usingahand vacuum pump.
2. Check output rodlength.
Specified length:
M195, S205orC205
10.275 -10.525 mm(0.4045 -0.4144 in)
Installation
CAUTION: • Becareful nottodeform orbend brake pipesduring instal-
lation ofbooster.
• Replace clevispinifdamaged.
• Refill withnewbrake fluid"DOT 3"or"DOT 4".
• Never reusedrained brakefluid.
• Donol mix different typesofbrake fluids(DOT3,DOT 4).
• Due tothe angle ofinstallation, threadcanbedamaged by
the dash panel.
1. Before fittingbooster, temporarily adjustclevistodimen-
sion shown. (Doesnotapply tovehicles fittedwithABS.)
2. Fitbooster, thensecure mounting nuts(brake pedalbracket
to booster) lightly.
3. Connect brakepedalandbooster inputrodwith clevis pin.
4. Secure mounting nuts.
Specification:
~: 13-16 N'm (1.3-1.6 kg-m, 9-12 ft-Ib)
5. Install master cylinder. RefertoBR-12.
6. Bleed air.Refer to"Bleeding Procedure", BR-6.

BR-16

ANTI-LOCKBRAKESYSTEM
Purpose

The Anti-Lock BrakeSystem (ABS)consists ofelectronic andhydraulic components. Itallows forcon-
trol ofbraking forcesothat locking ofthe wheels canbeavoided.
The ABS:
1) Improves propertracking performance throughsteering wheeloperation.
2) Eases obstacles tobe avoided throughsteering wheeloperation.
3) Improves vehiclestability bypreventing flatspins.

Operation

• When thevehicle speedisless than 10km/h (6MPH) thissystem doesnotwork.
• The Anti-Lock BrakeSystem (ABS)hasself-test capabilities. Thesystem turnsonthe ABS warning
light for1second afterturning theignition switchON.The system performs anothertestthefirst time
the vehicle reaches 6km/h (4MPH). Amechanical noisemaybeheard asthe ABS performs aself-
test. This isanormal partofthe self-test feature.Ifa malfunction isfound during thischeck, theABS
warning lightwillcome on.
• During ABSoperation, amechanical noisemaybeheard. Thisisanormal condition.

ABS Hydraulic Circuit

G)
Inletsolenoid valve

@
Outlet solenoid valve

@
Reservoir

@)
Pump
)(

@

@
Motor

@
Inletvalve

(J)
Outlet valve
@ Bypass checkvalve

BR-38 @

Check valve

@)
Damper

@
Gradient switch
SBR918C

ANTI-LOCKBRAKESYSTEM
Removal andInstallation
CAUTION: Be careful nottodamage sensoredgeandsensor rotorteeth.
When removing thefront orrear wheel hubassembly, discon-
nect theABS wheel sensor fromtheassembly andmove it
away.
FRONT WHEEL SENSOR
Front wheel sensor (LH) ~!Ii

3.9-5.9 (0.4 -0.6, 35-52)
~: Nom (kg-m, ft-lb)
~: Nom(kg-m, in-Ib)

SBR030DA
REAR WHEEL SENSOR
BR-40
\

L
Rear wheel sensor (LH)

~: Nom (kg-m, ft-Ib)
~: Nom(kg-m, in-Ib)

SBR031DA

ANTI-LOCKBRAKESYSTEM

Removal andInstallation (Cont'd)

SENSOR ROTOR

Removal
1. Remove thedrive shaftandrear wheel hub.Refer toFA
section ("DriveShaft",FRONTAXLE") andRAsection
("Wheel Hub",REARAXLE").
2. Remove thesensor rotorusing suitable puller,driftand
bearing replacer.
Suitable drift

SBR873CA
Installation
Install thesensor rotor.Forfront sensor rotor,usehammer and
wooden block.Forrear sensor rotor,usesuitable driftand
press.
• Always replace sensorrotorwithnewone.

SBR985C
•

• Pay attention tothe dimension ofrear sensor rotorasshown
in figure.
h: 4.5 -5.5 mm (0.177 -0.217 in)

CONTROL UNIT

Location: Passenger side,behind dashsidelower finisher.
• Make surethatthesensor shieldground cableissecured
with mounting bolt.

SBR986C

Suitable
drift

B,.,k" ~ ABS
.'0"'" ","

Dash side ~
lower finisher ~3.9_5.9 N.m

(0.4 -0.6 kg-m,

35 -52 In-Ib)
SBR032DA

Rear
sensor rotor

BR-41

,ryside
linder prima
From master cy ndaryside

r
der seco
master cyIn
From

RHO

cc:J
11-15 .11)
(1.1 .
1.5, 8

~ Front

LHO
ASS
relay
box
ground
Actuator
cable

---------~~~~~:A~K~EirS;V~S~T~EWo.M;(c:O;;~'diij)I----

ANTI-LOCK
BRdInstallation (Cont
Removal an
ABS ACTUATOR
heelcylinder (RH)
To rear
W
clinder (LH)
f ntwheel y
To ro
aster cylinder
From m
primary side
aster cylinder
From m 'de
secondary
Sl
(LH)
Wheel cylinder
To rear

W
heel cylinder (RH)
To
rear
(kg-m.in-Ib)
r.ii1
'N.m

IX! '
(kg-m. ft-Ib)

cc:J:
N.m

SBR033DA
BR-42

ANTI-LOCKBRAKESYSTEM
Removal andInstallation (Cont'd)

10. Draw outASS actuator asshown.

ASS
actuator

SBR039D CAUTION:
After installation, payattention tothe following points:
• Refill brake fluidandbleed air.Refer to"CHECK AND
ADJUSTMENT", BR-5and"AIR BLEEDING", BR.6,respec-
tively.
• Charge airconditioner refrigerant.RefertoHA section,
("R-134a ServiceProcedure", "SERVICEPROCEDURES").

• The installation procedureisthe reverse ofremoval.

ASS
actuator

_-=--=--=--=--_-_-\,_~
""'~t"
b"ok.,

SBR040D
ABSRELAYS

1. Disconnect batterycable.
2. Remove ASSrelay cover.

BR-44