1993 NISSAN SERENA Service Repair Manual

AN'I]-LOCK
BRAKING SYSTEM
COMTFOL UNIT
L@tlon: C{rer @NoL undd dash p5reL
Removal
ACTUATOB L Dlscon.ecibaterycable.
2. DEin b€ke lluid. Reler to changi.g arake Fluid" in
"CHECK AND ADJUSTMENT".
s. Apply dili66nl 6lor€d paint
to each p
p6
enn€.lor and
aclualor to prev€nl
incorccl conneclion.
l/xl
oisconnecl @nne.lor, brake p
pes
and
emove liring nuis and acluator grou.d
cable.
Us lbB nul sErch ro Emm lbE nul*
6. eetll nol
to d.mase erfde ol kake
I ih. &-tl.tor will not b6 iBr.ll.d dirElly
afi.r EmoEl, plug
bdc nuid inl€b .nd out-
let6 to p@nt
enterlnq du6t Into
etuaioi Insiallalion
Altor l.dalladon, 6ill br6k6 tuid. Th6n bled air.
F.fuT IO "CHECK AND ADJUSTMENT' 'Nd
"AIF
BIEEDING" BF.cdEly.
1. Tighten actuator grcund
cable.
2. Connel b.ak6 pip€s
tempoE ly.
5, Conne.t .on.ecior and battery €ble.
. Tighlen tlare nuts ot bake pipes
ro lh€ spec
BR-39

TROUBLE
OIAGNOSES
ComFFnt P.rt
rnd Co.Elor La.dm
ClEuft Dl.gm ior Ollck Plnpohr Ch6k
o€&ridion -
A.B.s, chek r
h.dcti6 -
A,B.s. ChelGr 8F.53
Ehctridl cmpoBnrs lEp€crid
olrgno.ic
P.o€dm 9 ..........
BF40

TROUBLE
DIAGNOSES
How to Periorm Trouble
Oiagnoses tor Ouick
and Accuaate BeDair
rNrnoDUcnoN
The A.B.S. sysi€m hai
an eleclonlc contro unil lo conrcr
mator iun.tions. The @ntrcl unit a@pls npur signals
f@m
se.so6 and in$anlv d ves a.lualorc. ll i6
es*nlialthat boih
kinds ol signals are pop6rsnd
sl.ble. At
the sade 1tme, il is
inDorlanl lhar lh€r€.re no
co.ve-xona oroolems such as an
leaks in rh6 boost*
or lines.lack
ot bEke ttuid, oroih6r prob-
rt is
much moE diflicuh to diaanos€
a problen
ihat oe!6
i emnen y
ralh6f lhan
conlinuolsly. l,lost nlemin6nl pob-
l€ns a'€ cLred
by poor
elednc m-noclions or laLlry M'.9
In Ihis
case. carelul checking ol suspicious . rcuits
may hep
P@ve lhe
rcplacemenl ol
Aood pans
A visualcheck only may nol lind
lhe 6ause offie p@bl6ms,
so
a road tesl should b€.aried oul
Betor6 unden.kinq
actuat checks, lake
lust a
i6w minutes
to
lak lo a.uslomer who apprcachos wilh
an A.B.s. comDlainl.
The customgr s a v€ry
sood sour.e
ol inro.malion d
slch
prcbl€ms: especially inGrmit€nt on€s. Thbugh
lhe lalks w h
lhe customer, fnd oul what symploms
are prcsent
and und€r
whal @nditons th€y occur.
Slarl youf
diagno6is by lookng
lor "conv6ntion." p@bems
I El. This is on6 oi Ihe
besi wavs b tolb eshool brake
orcb-
l€mson.n A.B.S
@nlro led
veh c e.
an erecrbnG
checker has b€€n dev€loped
to assist n A.B.s.
Trouble Oiagnoss. Using th6
checkei, a lut diagnoslic l6st
prccedu€ can b€ caried
out in a shon lme.
NISSAN slbngly €@mm€nd th.r rhis
checker be !s6d tof
A,B.S. Trouble Diagnosis.
lf, however, tor
A.B.S. chdk€r is not
availabe, a bsic pinpoint
diagnoslic pro€duE
i6 included
tor
^
,fi;r
r&,
8R.41

TNOUBLE
DIAGNOSES
Ho! r lo Pe olm Trouble Dlagnoses for
Oulck
and Accurate Repair (Cont'd)
l
i I
BR{2

TROUBLE
DIAGNOSES
KEY POINTS
WHAT Vehicle model
WHEN Da!e. Frequencies
WHEFE Boad condilions
HOW OpeBing @ndlions,
W€alher condilions. How
to Periorm T.ouble Diagnoses tor Ouick
and Accurate Repair (Com'd)
DIAGNOSNC WOFKSHEET
The€ are many kinds ol opoaling €rdilions lhal l6ad lo cus'
tom6fcomolainE. €ven illh€ svsrem i6 nomal.
A good
qEsp
ol such @ndilions can make ircubre-shootng
In g€ne€|,
leel ngs for a pobl€m
d€p6nd on 6ach.lslome/s
infomalion. ll s lhorclo€ imDodanl
to lullv
undeBtand
the
symploms or und.f whal condlion. a cuslomdr
@mprains
Mrk€ Aood !s€
of
a diagnostic worksheei slcti as the one
shown below in oder lo lliize arihe conolaints tor aoubre
Aes ABs
lE siw
I GE€r ! orh€')
BR.43

TROUBLE
DIAGNOSES
Symptom Chart
When.ot u.lng ch€clG/,
ir i3 |l@ry to perlod
dbgnctic proeduc
i lo 9. h addldd, { b.bo
neegry ro pcriom
"e{E ch4r'.
d- t
:
5
!
; 3
E
E
E E g
F
t €
I
:
a E
g
E a
I E
3 ?
E
I !
I
i ?
BR.{4

TNOUBLE
DIAGNOSES
Prelimhary Check 1
A
88.45

TROUBLE
DIAGNOSES
-4 PFlimlnary
Check 2
E
ur-oxnmo.@-d@h)
@-ornh{0.8'dmh)
BR.46