1993 NISSAN SERENA Service Repair Manual

TROUBLE
DIAGNOSES
lt
E[+ Electrical
Components Inspecton
EC.U. INPUI/QUTPUI SIGNAL INSPECNON
1. E.c.U. is l@ated behind the qLova
bor Forrhl6
in6p€.tion.
€move lhe g
ove box.
2. Fenove E C lJ.
ha'ness potedor.
3. Penom a I
vollage neasuemenls wilh the connecloF @n-
necled. Extend lestei probe
as shown io peiom
€sts eas-
EF & EC-321

TROUBLE
DIAGNOSES -dt
Elec{rical Components Inspection (Cont'd)
JE.C,U. lnsp€ctlon
tabl€
TEEii-Enm-iii:_l sANERY VOLTAGE
II] I1V)
Fadiaro, ran
Gra, (Lm*F8d) BATTEFY
VOLTACE
111 .
I4V)
Rad aro' ratr Gray (N
sh{pd) BATTERY
VOLTAGE (1
1 '
I4V)
SAnEFYVoLTAGE(ir. r4v)
EF & EC425

TNOUBLE
DIAGNOSES
Electrical Components lftpecrion (Contd)
fEi4rojj]fu!nm@l
cffk anq € $ns (aai6€nca
sio.
bndMogtE'lhigh.F.d
cBd 'nqa E6ftor (Posrion,isnau
Doidru.dolmdhlahlF.d
la;iron6iiaF-[l
fianEindh-trsrAFil EATTEFYVOLTACE
(II.
14V)
fildbn ehaF
OFrf
filjrdmjj $irci-dl
MNEFY VOLT^GE (11.
T4V]
fiqjitr fi?Frotrrrl
frrd-trfuah -6-Nf
BANEFY VOLTAGE (11
]4V)
8ANEFY VOLTAGE (I
I ]1!1
EF & EC€26

TNOUBLE
DIAGNOSES
Eleclrical Components
Inspection (Cont'd)
rtillt,iMrrdFFrl MnEFY VOLTACE (rr .14v)
tt.;ims ffihql
SAITEFY voLr^GE (1r .14v)
fEinaim Gim-ins:l
8AnEFY VOLTAGE (11
r4vJ
BAnEFvvoLraGE(11. 14v)
EF & EC-327

TROUBLE
DIAGNOSES -dt
Electric€l Componenls Inspeclion (Cont'd)
EC.U. HABNESS CONNECTOR TEFMINAL LAYOUT
I{I II
I0lt0txlti l0!
I2 3 4 7t;t
t"l l5
t7
]E l92l 2l
22 llJ2 t3l1l5 3637l8 J9
t{t lt0llt
|ilt 11a9l0 ll I3 2321 2l29
30 40 1315L71E
EF & EC32S

TROUBLE
DIAGNOSES
(d.
5m
@ffi Electrical
Componenb Inspection (Cont'd)
CFANK ANGLE SENSOF
1. Fedove d sl bulor lom e.gine. (C€.k
a.qle sensor har
.ess @.n4tor should @ma n.on.ected.)
Di$onneot ignilion wies.
Tuh ignit on switch 'ON
'.
Fotale dislibuior shali slowly by hand a.d check vollage
belween leminars
O, O and
sound
2.
lJ N.G., Gp ac6 dislibulor ass.mbly wilh
c6nk angle sen-
5. Visualychecl
sqna pale
lordamage o' dusr.
AIF FLOW METEF
1. P.d an flow mer€f hahess
connector rubber as shown in
lh€Jigurc it rh6 hahe$
connecior is @.neded.
Tu igniton switch "ON
,
$an.ngine andwarm i !p sutlicientty.
Chek vollag€
belween leminal
GJ and
g@und.
renio si.h oN' (Eis,ne
sropped
)
rdb (Ensh6
s *afrup
suft.ied y.)
5. ll N.G., €move
air llow
meier lom air duol. Ch6ck hor wi€
EF & EC€29

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

TROUALE
DIAGNOSES
Eleclrical Componenls Inspection (Cont'd)
1 . Dis@nn€cr lu6l pump
haness con.ector.
2. che[ r€s eran€ beleeen
le'hmats O and (E).
R6isrEne: Apprdlmatety O,7O -
ll N G. @pace luelpump.
EXHAUST GAS
SENSOF HEATEF
Check es slanG beM6€n t€m'nars (a
and fdj.
Rdisr.ne: 3 -
r,oooo
ll N.G., replace €xhaust gas
se.sor.
THBOTTLE SENSOR
1. Disconnect lhotr. s€nsor h
2. Mak6 sur€ lhal €sislance
between lemimh
@ and
@
crranges wh6n op€nng
lhrcnb valve ma.ually.
I lhbnle s6nsr is
replaced or €mov€d, il is
necessary 10
nslan in proper
posllon,
by lollowina lhe po@dure
as showf
1 l.slal ftrcn|e scnsof body in
lhrcnte chamber Oo mr
lighlen bolls. L6av6 bolls loose.
Connocl lhmnb
.ensor hafress connector.
slan €nQine
and warh i1 up suliiclenlly.
/,a Penorm
THROTTLE SEN ADJ
rn WORK SUP-
Me.surc oulpul voltage ol lhot e sensor
using voll,
5 Adjusl rotating rhroft €
snsor body so lhat ourpur vollage
6. Tlghl€n
mounling bo ts.
7. Ois@inecllh@1l€sensorhamesscofneclortor.l€wsec-
onds and Ih6. reconned
n.
2.
E
@
(!tl
6E
ll N.G., replaB throftle sensoi.
EF & EC-331