1993 NISSAN SERENA alternator

ELECTRICAL
SYSTEM
SECTION EL
When you
read wiring
diagrams:
o Read
Gl section, "HOW
TO READ WIRING
DIAGRAMS''.
CONTENTS
STARTING SYSTEM
STARTING SYSTEM -
Starter -
...
CHARGING SYSTEM
CHARGING SYSTEM*
Alternator -
COMBINATION SWITCH ....
HEADLAMP -
Without Daytime Light System and Dim-dip
Lamp System
HEADLAMP -
Daytime Light
System -
HEADLAMP -
Dim-dip Lamp
System -
HEADLAMP -
Headlamp Aiming
Control
HEADLAMP
EXTERIOR LAMP ............
tNTER|OR 1AMP ............
METER AND
GAUGES
WARNING LAMPS AND BUZZER
WIPER AND WASHER
HORN, CIGARETTE LIGHTER AND
CLOCK
REAR WINDOW DEFOGGER EL-
2
EL- 3
EL- 6
EL- 11
EL. 18
EL.20
EL- 28
EL- 30
EL- J/
EL. 39
EL- 40
EL- 42
EL. 44
EL- 49
EL- CI
EL- 64
EL. OO
EL- 73
EL- 80
EL- 88
EL- 89
I::L- J Z
EL- 95
EL-101
EL- 129
LOCATION
OF ELECTRICAL UNITS
HARNESS LAYOUT ...,........
SUPER MULTIPLE JUNCTION (S.M.J.)
..........
URING DIAGRAM REFERENCE CHART
ENGINE ROOM FAN
LC S€CTION
E.C.C.S. EF & EC SECTION
ANTFLOCK BRAKING SYSTEM
A/T
CONTROL AT SECTION
BR SECTION
BF SECNON
HA SECNON
POWER
WINDOU POWER OOOB LOCK,
S€AT BELT.
SUN ROOF.
OOOR MIRROB
HEATER ANO AIB
CONDITIONER HEATED
SEAT.

CHARGING
SYSTEM
Troubleshooting
Before conducting an alternator
test, make sure that the
battery is fully charged. A
3o-volt voltmeter
and
suitable test probes
are necessary
for the test. The
alternator can be checked
easily by relerring
to the
Insoection Table.
Betore starting troubleshooting,
inspec,t the fusible link.
WITH IC REGULATOR
l/Vrrh.lt.rn.to. iid. L r.rm;nel
groundad, Intcrnal 3ho7t occuri
whln +
diod. ri
3hoit-crrcurtod. |;;;;-l
I burb
Repl.ce
I
I end
Proceed
I
- -l'."r-"
I
\--6;;"*;l
,/
lRepleco. I
) F"-"r""
"c;:l
E."*;;I
- -lo,
a.c.c I
- F;"d"-l
--F* _-l
-@
D-|;;;d'cnc'l
/
lR6elacs. I
---l;* __l
'SGe
4l lor grounding F
termrnel.
(H ITACH I
1)
2l Ur
lully
dr.n d brtr.ty.
Light :
Cbrgt wrming light
A.C.G. :
Alt.nrator p.rtr
ax6pt lC
lrguhtot
IC.RG :
lC r.!ul
or
O.K. : lC-rhrrtt.tor
it in good
@ndhbn.
Wbn r.aafiing
"O.nrqad A.C.G.", rar|oy!
allarnatc tron
r.lrida
||td ditaaxmbla, intpasr
|rrd corrrct or
aapLc. fasltY prn!.
'Mrthod of ero{Ddirt F
t.rmin.l
{HITACHI mrkc
onlyl Make
suro connodor
(S, L) is
connocted
3)
4) More
than 15.5V
13 ro l5V
EL-29

CHARGING
SYSTEM _
Alternator _
Removal and lnstallation
SR2ODE ENGINE
fq: N
m
{Ko m. tl-lb)
GA16DE ENGINE pl
ro :r t.6-p1
12 i,,i
."-"'-E
Z|o! as. so
(4.6 ,
6.1
33 -
44)
r?)
--'-.! Q re-zr
t1
6 21 1p,i5t
//
t) Nm
rr.tjm a,b)
f) rz
so (38
s r
27 37r EEL0]3
EL-30

CHARGING
SYSTEM _
Alternator _
Removal and Installation (Cont'd)
EL-31

CHARGING
SYSTEM -
Alternator -
Construction
SF2ODE ENGINE _
LR.19O-719
GA16DE ENGINE _
LR-18G735
(n.eu'r6
,"d *>d0
@shM* (v\
".Y\ \.
.' .i,
,9
LII20[ ENGINE -
9120.335.000
@ Rear
cover
O Voltage
regulator
f,Q Brush
.9
Pulley
O stator
O Diode
plate
assy.
EL.32
O
Vacuum
pump
O Rotor
(D Front cover
@ Fan

CHARGING
SYSTEM -
Alternator -
Soldering aron
{200W capacirv, Disassembly
BEAR COVER REMOVAL
CAUTION: Rear cover may be hard to remove because a ring is used to
lock outer race
of rear bearing. To facilitate removal of rear
cover, heat
iust bearing
box section with
a 2oGwatt
soldering
iron.
Do not use a heat gun,
as it can damage diode assembly.
Rotor Slip Ring
Check
1. Continuity test
o No
continuity... Replace rotor.
2. Insulator
test
. Continuity
exists ... Replace rotor.
3. Check slip ring for wear.
Slip ring minimum
outer diameter:
Refer to S.D.S.
Brush Check
'L Check smooth movement
of brush.
. Not
smooth ...
Check brush holder
and clean.
2. Check
brush for
wear.
o Replace
brush if
it
is worn down to the limit line.
3. Check
brush lead
wire for
damage.
o Damaged...
Replace.
4. Check brush spring pressure.
Measure brush spring pressure
with brush projected
approximately 2 mm (0.08
in) from
brush holder.
Spring pressure:
Refer to S.D.S.
o Not
within
the specified values ... Replace.
Ohmmeter
Erush woar limiting
line
2 mm (0.O8
in)
EL.33

CHARGING
SYSTEM -
Alternator -
Stator Check
To test the stator
or diode, separate
them by unsoldering
the
connecting wires.
CAUTION:
Use only
as much heat
as required
to melt solder. Otherwise,
diodes will
be damaged
by excessive heat.
1 .
Continuity test
o No
continuity... Replace stator.
2. Ground test
o Continuity
exists... Replace stator.
MAIN DIODES
r Use
an ohmmeter
to check
condition of
diodes as indicated
in chart
below.
o lf
any
of the test results
is not satisfactory,
replace diode
assembly.
Ohmmeter probes
Continuity
Positive O
Negative
O
Positive diode plale
Diode terminals
Yes
Diode lerminals Positive diode plate
No
Negalive diode plate
Oiode terminals
No
Oiode terminals
Negative
diode plate
Yes
EL-34

CHARGING
SYSTEM -
Altemator -
Crolin .nia|| ,Dod.l
Brurh litt
rvira Stator
Check (Gont'd)
SUB-DIODES
o Attach
ohmmeter's orobe to
€ach end of diode to check for
continuity.
o Continuity
is N.G. ... Replace diode
assembly.
Assembly
Carefully observe the following instructions.
o When
soldering each
stator coil lead wire
to diode assem-
bly terminal, carry
oul lhe operation
as fast
as possible.
REAR COVER INSTALLATION
1. Before installing front
cover with pulley
and rotor with rear
cover, push
brush up with lingers
and retain
brush by
inserting brush lift wire
into brush lift
hole lrom outside.
2. After installing front
and rear
sides of
alternator, pull
out
brush lift wire.
EL€5