1993 NISSAN SERENA check engine

TROUBLE
DIAGNOSES
@#'N 'yu! How
lo Pedom
Trcuble Dlagnoses lor Ouick
and Accural€ Repair
INTBOOUCNON
The engine has an e ecvo.ic @nlrol!nr1lo coniblmajor sys-
lems slch as lu€lcontrcl, gniton
control, idle speed conlol,
elc. The coniol lnil accepls inpul
signab irom sensoG and
inslant y
drives aclualoB. ll
s ess€nliallhal boih kinds ol sig
nals arc poper
and slab e al
the sam€ lim€,
il is impodanllfral
therc are no @rventional prcblems
such a6 v.cuum
l6aks,
toul€d spa* p
ugs, or olher prcblems
wln lhe ergine
ll is much mo€ dficull lo diagnose a problem
lhal occu6
lnlemillenty Ether lhan @ntinuously. Mosl
iniominenl pob'
€ms arc caused by poor
e ectr c @.nedions or npbper w .
ng. In this c66, €r6lul check ng ol suspecled circuiF day
h6p pr€venl
th€ €pla.omenl ol
Cood pans.
A vislalch€ck only may nol lind lhs cause of lhe p@b
ems, so
a road rest with a circu 1 lester conn€cl€d lo a suso€cl€d c rcu 1
Betore undenakinq actual .hecks, lake
lust a
lew minules lo
la k wilh
a cuslom€r
who aoDroachss wlh a ddv€abiitv com-
plaint. The customer is a very qood
supplier ol i.lomalio. on
\-.hpobens especicly inle'Titlenl
ones lh'oLgh
irle'ac
lion with lhe customef,lind oul whar symdoms are prese
and
u.der whal mndilions lhoy oeur.
Slaft your
d agnosis by looking tof conve ional' prcblems
in* Ths is one ol th€ b€sl ways to lrcuboshoot drveabilily
probLems on an €leclbn €l y
.onlb l6d €nq ne vehicl6.
EF & EC-216

TROUSLE
DIAGNOSES
f o Self{iagnosis
CHECK ENGINE UGHT
A ch€ck€ngin6liQhl hs be€n adopled on allmod€ls. This liqhl
blinks smulraneously wrh rhe FED L.E.D. o. the E.C.U.
E.C.U. LE,D,
Th6 E.C.U. is siiualed behindlh€ glov€
box, and ony has
one
REO L.E.O.
SELFDIAGNOSNC FUNCTION
.";il*
@ IL:L)
EF & EC-220

TROUBLE
DIAGNOSES
Selfdiagnosis -
Mode I
MODE I _
BULB CHECK
In this mode,
rhe FED L.E.D. in
th6 E.c
U.
and rhe
CHECK
ENGINE LIGHT n lh€ insltum€nl panelsl,ay
"ON'.
ll elrher€main "oFF
, checkrhe
bllb in rhe cHEcK ENGINE
LIGHT or lhe RED
L E.D
MODE I _
MALFUNCTION WAFNING
. Th6
FED LE.D..nd OE CHECK ENGINE LIGHT
{llltun oli
when nomal @ndnlo is deleted.
Sell-diagnosis -
Mode ll (Selfuiagnostic
results)
DESCFIPnON
In this mode, a mallunclion code ls lndi€l€d bylh€ numbd ol
llashes iioh
the FED L.E.D. orlhe CHECK ENGINE LIGHT as
LonA (0.6
s€6nd) blinking ind
€les the number ot len dtgis
and shorr (o.3
s€6nd) blinkng indicates
the nudber ot singto
digils.
Fof exampl6, rh6 r€d L.E.D. f.sh€s once lor
0.6 se@nds and
then itllashes lwice lor 0.3 s€@nds. Th s ind
€tes the number
''l2 and €f6rc lo a malfuncton in
the a r llow meter. tn fi s
'' " ns ar€ c. code nJnbers.
ol.Drav @de t bre
EF &EC-22

TROUBLE
DIAGNOSES
Selfdiagnosis -
Mode ll (Exhausl gas
s€nsor
monilor -
Models wllh catalyzer
only)
DESCFIPnON
Inlhis mod6,lh6 CHECK ENGINE LjGHTand
FED L.E.D. dis-
play lhe @nd'tion d fte lue
riere
{l6dn o
ch) wrich is
monirored by lhe exhausl gas
s6nsor.
*: Mahb ns condiions jusr
bs.orc sw
HOW TO CHECK E.XHAUSI
GAS SENSOR
1. S6t Mode 1l
lReler to "How To swtTcH MoDEs".l
2 Slal engre cnd wa a i up
unrle.qne coola.t lenped
ur€ ird eror poinc
to rhe
m ddte ol ^e
gauge.
-
3 BJn eng'ne ai aboJr 2,ooo
?n tor
aooui2;n-ter
Jnde'
no]oad condilions.
4. Mak6 su€ REO L.E.D
or CHECK ENGTNE LtcHT oo€s
O .rd OFr no'. rhan
5 [Tes evea -O
s€lonos: ;€a.
su€d at 2.o0o
Dm u.derno-toad.
EF &ECJ%

TROUBLE
DIAGNOSES
Elec-tricEl Components Inspection (Cont'd)
ENGINE TEMPEFATUFE SENSOR
1 . Oisnn€ct 6nq ne
lemperaiure sensor hamess @nnector.
2. Ch€.k €. .lane 6 shown i. the tigure.
ll N.G., €place engine lemp€ralu€ s€nsor.
GNMON @IL
1. Disconn.d qniton
co I
harness @.ne.tof.
2. Ch€ck r€sisla.ce
as shown in lhe lguB.
o.o
ll N.G,,
replace ignitio. @it.
P,OWER TFANSISTOA
L Dis@nnecl power
lransistor ham€6.
@nnectoi.
2. Check power
tansislor cont nuily
belwe. lemi.als with a
d gilaltesl€r
as shown n
the iigure.
o.o
lf N.G., €da6 power
l€nsisior.
o
o
o
EF & EC-g'o

EVAPOBATIVE
EMISSION CONTNOL SYSTEM
Oascriprion
Inspeclion
Check cabon oanistor as lo lows:
O :
Blow anand
ensu€ Ihatthe€
@ :
Blow
aiiand ensu.ethailheG
-lhe
evaoo€lve emission coniol svsl€m is
used lo reducc
hydroebons omllted i.lo lh€ almosphere tom
lhe iuel sys
lem. Ths rcdlction ol hydro.arbons
s ac@dpished by acli
val€d char@als in
the cabon canister.
The tlel vapor from the sealod tu. rank i. led into rhe
canister
which conhins aclival€d.adon .nd
lhe vapor
is slored lherc
when lh€ €ngin6 is not tunninQ.
The canister
elains lhe fuelvapof unlillh6 can sl€f is puq€d
bylhe an dBwn through lhe bonom ol lh€
canisler lo the inlake
manilold wh€nlh€ €nqin€ is
running, When the engine runs al
ld€, lh€ purg€.ontrcl
valve is cosed.
OnlV a smal amounl of stored vaDor f ore ntolhe ntake
ma-
nifold lh@ugh lhe corclant plrge
o li@
As the engine speed
incrcases, andlh6lhbnb vacuum
ises hiqher,ftepu€e con,
tolvalve oo€rc and Ihe vaDor is
sucked inlo lhe niake manr
fold through bolh
lhe main purgeorlice
and lh6 conslant pulqe

OUICK€LOW
SYSTEM
Comoonent Parts Baslc Ch€ck
ENNFE SYSTEM CHECK
ser vortmeier bellleen grow
plug
and engine body.
. Read voLiag6 when ieniton ksy is i.sd€d into ignilion
Ern6ry v!{agp ior abolt 3 6n.rs
2. ouick-glow (Pre-slow)
syslem
1) Iuh ignihon swtch 'ON
3 or mor6 sconds ai1* k€y-in.
Adbry v!t!g. for .hqit 2lf
snd8
' c@|am r.mp.r.ruF b low $.n 6{rc (i4cn
' R.p.6dnq lgdnon i6y oN"sd oFF'nly
chlngE th. tim,
n
^f
{rjllT *"s-
Ouick-slow (c€nkind
.ysr€m
1) Oisconnecl
"9 lemlnal
lor sianef moior lo prev€nl
6nain6
2) F€d vollage when igniroi k6y is rum€d to "STABT .
Balt ry hltag.'
, For .bod m snd. aner Ermhg
lgddm
1) Connecl
"S" l€minalto
daner motor.
2) Start engine and €ad voltagB.
Barbry rcnag. id 5r mhur€s
, Cdrani t6np.€t!b b rtur
ihs 6fC (14OF).
*Tt
TIJI
T:I
EF & EC€gi'

OUICK€LOW
SYSTEM
Et6
ffi l__
I aol
u*
Idg:rud:le
Componenl
Pads Basic Check (Cont'd)
POWER SUPPLY FOF
GLOW CONTFOL UNIT
1. Ois@nnecl S"temiia tor $aner molor lo prcverl
engine
2. [email protected]| glow
conl@l un t hah€ss enneclof.
3. ch6ck l6m nal(s)
@(Mod6ls wilh
E.G.R.:
@, @, @ and
@) lor
grolnd
conlinuily.
condnuhy 3h@rd dj3t (m),
. It N.G., checkgound hane$.
li 4.
ch6ck vollage
al each leminal accodinq to the lonowing
o o
o (e
o o
o @@
@ o
o @
. ll
N.G-, check
@mponenl Dans and
then re|at€d h.m€ss
a@odinglo lhe lonowing chan.
@ @
o o
o @
@ 6@
@ o
o @
@at
EF & EC-394