Datsun 1968-1973 510 Owners Workshop Manual page 84

Chapter
4
lgnltlon
system
83
16 0
18
21
@
17
Q
1
19 J
22
J
1
O
0
15
20
3
2
5
25
21
@
22
23
25
To carburmor
W
1
9
8
7
I
6
IJ
10
FIG 416
IGNITION SYSTEM
HT CABLES
COILS AND MINOR COMPONENTS
1 Cable clamp
2 Cable
clamp
holder
3
Cable clamp
4 Cable holder
5
High
tepslon
cable
6 High
tension
cable
8 High tension cable
9
HlrfI tension cable
10 Spark plug
11
Spark plug
washer
12 Vacuum tube grommet
13 Vacuum control tube
14 Fault diagnoSis
engine falls
to start
1 If the engme falls
to start
and the
car was running
normally
when
It was
last used first check there
IS
fuel
In
the petrol tank
It the engme
turns over
normally on
the starter
motor and the
battery
IS
evIdently well
charged
then thefault may be
10
BIther
the
hIgh or
low tens
on CirCUIts
First check the HT
CirCUit
NOTE f the
battery
IS
known
to
be
fully Charged the
gnltlon
hght
comes on
and the starter
motor
fads
to turn the engm8
CHECK
THE
TIGHTNESS OF
THE LEADS OF
THE
BA TTERY TERMINALS
and also the
secureness
of the earth
lead
to ts connection to
the
body
It
IS qUite common
for the
leads
to
have worked loose
even
If they ook and fee
secure
If
one
of the battery
terminal
posts gets
very hot when
trying
to
work the
starter
motor
thiS
IS a sure
IndicatIon of
a
faultv
connectiOn to that terminal
2 One of the
commonest
reasons
for bad
starting
IS
wet or
damp spark plugs leads
and dlstnbutor Remove
the distributor
cap
If condensation
IS
VISible
Internally dry
the cap with
a rag
and also wipe
over
the leads
Replace
the
cap
3
If the engine stili falls
to start check that
current
IS reaching
the plugs by
dlsconnectmg each
plug
lead
In
turn at the
spark
plug end and holdmg the end of the cable about 0
188
lOch
4761010
away from the
cylmder
block Spm the engme
on
the
1480lt
15 Gasker
76 0 ring
17
Spring
washer
18
Screw
19
Dl
tflbutor
support
20 D
stn
butor assembly
21 Plam
washer
22
Spring
washer
23
Screw
24 ReSIstance
25 Igmtlon
COil
Starter motor
by pressing the rubber button on the
starter motor
solenoId SWItch
under the
banned
4
Sparkmg
between the end of the
cable
and the block should
be fairly strong
WIth
a
regular blue
spark
Hold the lead WIth
rubber
to
avOId
electriC
shocks
If
current IS
reach 109 the plugs
then
remove
them clean and regap them
to
0031 0035
lOch
08
09
10m
The
engIne
should
now start
5
Spon
the engme
as
before when
a
rapId
successIon
of blue
sparks between the end of the lead and the block mdlcates that
the COIl
IS In
order and that either the distributor cap
IS
cracked
the carbon brush
1
stuck
or worn
the
rotor arm IS faulty
or
the
contact
pomts are
burnt
pItted
or
dIrty I f the
pomts
are In
bad
shape clean and
reset
them
as
described
10
SectIon 3
6
If there
are no
sparks from
the end of the
lead
from the call
then check the connectIons of the lead
to the Call and dIS
tributor cap and If
they
are 10
order check
out
the low tensIon
circuit starting With
the battery
7 SWItch
on
the
IgnitIon
and
turn
the
crankshaft
so
the contact
breaker pomts have fully
opened
Then
WIth eIther
a
12 volt
voltmeter
or
bulb and
length
of
wore
check that
current
from
the battery
IS
reach 109 the
starter
solenOId
switch
No readm9
Ind
cates
that there
a
fault En the cable to theSWitch
or In
the
connectionS
at
the SWitch
or at
the
battery
terminals Alter
natIvely
the
battery
earth lead may
not
be properly earthed
to
the body