1977 DATSUN PICK-UP Service Manual

W
b
IlR

o
ignition
coil
assemblY

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Ignition
unit
EeA40

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EE
90
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a
El19ine
ElectriCal
svstel
O

EE
4S

The

ignition
coil
is

an
oil
f1l1ed

type
The

ignition
coil
case

is
filled

with
oil
which
has

good

insulating
and

heat

radiating
characteristics

The

ignition
coil
has
a

greater
ratio

between
the

primary
and

secondary

windings
to

step
up
battery
voltage
t

high
voltage
This
causes

stronger

sparks
to

jump
the

spark
plug

gap

The

cap
is
made
of

alkyd
resin

which
offers

high
resistance
to
lectric

arc
and
increased
insulation

The

ignition
coil
and
resistor
should

be
handled

as
a
matched
set

When

high
tension
wire
is

installed

to

ignition
coil
there
should
be

no

clearance
between
their

caps

I
EE354

1

High
tension
wire

2
Rubber

cap

Fig
EE

94
Correcl
installation

of

high

t
Mjon

win

SPECIFICATIONS

Type

Primary
voltage

Spark
gap

Primary
resistance
at
200C
680F

Secondary
resistance

at
200C
680
F
KSl

External

resistor
at20
C

680F
n
Engine
Electrical

System

IGNITION
COIL

California
models

f
ID

@

J

C

ID

I
1W

1
R

bber

cap
for

ignition
coil

2

Secondary
terminal

3

Cap

4

Primary
terminal

5

Spring

6

Secondary
winding

7

Primary
winding

Notes

a
Do

not
disconnect

high
tension

wires
from

spark
plugs
during
en

gine

mnning
California

models

only

b

RoD

up
high
tension

wire
mbber

cap
and
instaD

high
tension
wire
to

ignition
coil

securely
Refer
to

Figure
EE
9S
Non
califomia

models

EE314

8
Side
core

9
Insulator
coil

10
Center
core

11

Segment

12
Case

13
Rubber

cap
Cor
terminal

Fig
EE
93
Sectional
view

of

ignition
coil

Fig
EE

95

Installing
high
tension
wire

Non

California

California
models

models

C6R
618

HS
15
18
CIT

16
STC
9

12
12

more
than
7

0
28
more
than
7

0
28

1
08
to
1
32
0
45
to

0
55

8
24
to

12
4
8
5
to

12
7

1
5
1
3

0
4
0

9
V

mm
in

n

EE
46

DESCRIPTION

INSPECTION

CLEANING
AND
REGAP

DESCRIPTION

The

spark
plugs
are
of
the

conven

tional

type
having
14
mm
0

551
in

threads
The

spark
plug
gaps
are
1
0
to

1
1
mm
0
039
to
0
043
in
on
Cali

fomia
models
and
0
8

to
0
9
mm

0
031
to

0
035
in
on
non
California

models
The

inspection
and

cleaning

should
be
made
every
suitable
mainte

nance

period
If
necessary
replace

Note
All

spark

plugs
installed
on
an

engine
must
be

of
the
same
brand

and
the

same
number
of
heat

range

INSPECTION

L
Remove

spark
plug
wire

by

pulling
on

boot
not
on
wire
itself

2
Remove

spark
plugs

3

Check
electrodes
and
inner

and

outer

porcelains
of

plugs
noting
the

type
of

deposits
and
the

degree
of

electrode
erosion

Refer
to

Figure

EE
96

Normal
Brown
to

grayish
tan
de

posits
and

slight
electrode
wear

indicate
correct

spark
plug
heat

range

Carbon
fouled

Dry
fluffy
carbon

deposits
on
the
insulator
and

electrode
are

usually
caused

by

slow
speed
driving
in

city
weak

ignition
too
rich
fuel
mixture

dirty
air
cleaner
etc

It
is

advisable
to

replace
with

plugs

having
hotter
heat

range

Oil
fouled
Wet
black

deposits
indi

cate
excessive
oil
entrance
into

combustion
chamber

through
worn

rings
and

pistons
or
excessive
clear

ance
between
valve

guides
and

stems
If
the
same
condition
re

mains
after

repair
use
a
hotter

plug
Engine
Electrical

System

SPARK
PLUG

CONTENTS

EE
4B

EE
47

EE
47

EE
47
SERVICE
DATA
AND
SPECIFICATIONS

TROUBLE
DIAGNOSES
AND

CORRECTIONS
EE
4B

Overheating
White
or

light

gray
in

sulator
with
black
or

gray
brown

spots
and
bluish
burnt
electrodes

indicate

engine
overheating
More

over
the

appearance
results
from

incorrect

ignition
timing
loose

Normal

Overheating

EE079

4
After
cleaning
dress
electrodes

with
a
smaU
fine
file
to
flatten
the

surfaces
of
both
center
and
side

electwdes
in

parallel
Set

spark
plug

gap
to

specification

5
InstaU

spark
plugs
and

torque

each

plug
to
L5

to
2
0

kg
m

11
to
14

ft
Ib

6
Connect

spark

plug
wires

CLEANING

AND
REGAP

Clean

spark
plugs
in

a
sand
blast

type
cleaner
Avoid
excessive

blasting

Clean
and
remove
carbon
or
oxide

deposits
but
do
not

wear
away

porcelain
If

deposits
are
too
stubborn

EE
47
spark
plugs
low
fuel

pump
pres

sure

wrong
selection
of
fuel
a

hotter

plug
etc

It
is
advisable
to

replace
with

plugs

having
colder
heat

range

Ir

i

Carbon
fould

Worn

Fig
EE
96

Spark
plug

discard

plugs

After

cleaning
spark
plugs
renew

firing
surface
of
electrodes
with
me

mentioned
aboVe
Then

gap
spark

plugs
to

specified
values
with
a
round

wire
feeler

gauge
All

spark
plugs
new

or
used
should
have
the

gap
checked

and
reset

by
bending
ground
electrode

EEOBO

Fig
EE
97

Setting
park
plug
gap

Engine
Electrical

System

SERVICE
DATA
AND
SPECIFICATIONS

California

models
Non

California

models

For
Canada

except
for

Canada

BP6ES
ll
BP6ES

BPR6ES
Standard

L45PW
ll
L45PW

BP4E
ll
BP5ES
ll
BP4E

BP5ES
BPR4ES

Type
Hot

type

L46PW
ll

L47PW
ll

L46PW
L47PW
BPR5ES

Cold

type
BP7ES
ll

BP7ES

BPR7ES

LMPW
ll
LMPW

1
0
to
l
l
0
8
to
0

9
0
8
to
0
9

Plug

gap
mm

in

0

039
to
0
043
0

031
to
0
D35
0
031
to
0

035

Tightening
torque
kg
m
ft
Ib

I
1
5
to
2

0
11
to
14

TROUBLE

DIAGNOSES

AND

CORRECTIONS

When

engine
does
not
start

If
there
is

no

problem
in

fuel

system
ignition
system
should
be

checked
This
can
be

easily
done

by

detaching
a

high
tension
wire

from
spark

plug
starting

engine
and

ob

serving
condition
of

spark
that

occurs

between

high
tension

wire
and

spark

plug
terminal

After

checking
this

repair
as

necessary
Note
On
California
models

disc
on

nect
anti

dieseling
solenoid

valve

connector
to

cut
off

supply
of
fuel

to

engine
and

then
observe

the

condition

of

spaIks
while
starter

motor
is

in

operation

Condition
Location

Probable

cause
Corrective
action

No

spark
at
all

Distributor

Faulty
insulation
of
condenser

Non
Cali

Replace

fomia

models

Breakage
of
lead
wire
on
low
tension
side

Repair

Poor
insulation
of

cap
and
rotor
head

Replace

Seized

points
Non
California

models

Repair

Open
pick
up
coil
California
models

Replace

Air

gap
wider
than

specification
Cali

Adjust

fornia

models

Ignition
coil

Wire

breakage
or
short
circuit

of
coil

Replace
with
new
one

High
tension
wire

Wire

coming
off

Repair

Faulty
insulation

Replace

Transistor

ignition
Faulty
transistor

ignition
unit

Replace

unit

California

models

EE
4B

Condition

Spark
length

I

to
2
rnm
0
039

to
0
079
in
Of

irregular

More

than
6
rnm

0
236
in
Engine
Electrical

System

Location
Probable
cause

Distributor
Point

gap
too
wide
Non
California
mo

dels

Oil

on
point
Non
California
models

Burned

points
Non

California
models

Spark

plugs
Spark

plug
gap
too
wide

Too
much
carbon

Broken
neck
of
insulator

Expiration
of

plug
life

Air

gap
too
wide
California
models

Distributor

Transistor

ignition

unit
California

models
Faulty
transistor
ignition
unit
Corrective
action

Correct

Clean

Replace

Correct
or

replace

Clean
or
replace

Replace

Replace

Correct

Replace

2

Engine
rotates
but
does
not
run

smoothly

This

may
be

caused

by
the

ignition
system
or
other

engine
condi
Hons
not

related
to

ignition
Therefore
first
a
complete
inspection
of

ignition
system

should
be

carried
out

Condition

Engine
misses
Location
Probable

cause

Distributor
Dirty
point
Non
California
models

Foreign
mattef
on

pick
up
coil
California

models

Improper
point

gap
Non
California
mo

dels

Impropef
air

gap
California
models

Leak
of

electricity
at

cap
and
rotor
head

Damaged
insulation
of
condenser

Non

California
models

Malfunctioning
contact
arm
Non
Cali

fornia
models

Faulty
contact
arm

spring
Non
Cali

fornia
models

Breakage
of
lead
wire
Non
California

models

Breakage
of

pick
up
coil
lead
wire
Cali

fornia
models

Worn

or
shaky
breaker

plate

Worn
or
shaky
distributor

driving
shaft

Layer
short
circuit
or
inferior

quality

coil
Ignition
coil

High
tension
wire
Deterioration
of
insulation
with
con

sequent
leak
of

electricity

EE
49
Corrective
ac
ion

Clean

Clean

Correct

Correct

Repair
or

replace

Replace

Oil
shaft

Replace

Replace

Replace

Replace
assembly

Replace
assembly

Replace
with

good
one

Replace