ignition DATSUN B110 1973 Service User Guide

BODY
ElECTRICAL

When
the

ignition
switch
is
set
to
ON
the

ignition

wa

rning
circuit
is

closed
and
current
flows
flows
from
the

ignition
switch
to
the

warning
lamp
bulb

and

ground

through
the

regulator
When
the

engine
is
started
and
the

generator
comes
into
operation
the

generator
output

current

opposes
the
current
flowing
from
the

warning

lamp
in

effect
it
breaks
the

warning
circuit

ground

connection
and
the

lamp
goes
out

l

r

hffi
u

z
Ignition
switch

I
Q
6

I
0

c

M
1
E

8

ca
i

L

g

PI
lot
c

P

I

j

co

rt
0

relay
E
0

5

y
y
1

N
N
3

Alternator

Regulator

Fig
BE

41
Circuit

of
ignition
warning
system

HAND
BRAKE
WARNING
LAMP

This

lamp
functions
both
hand
brake

warning
larnp
and

BULB
SPECIFICATIONS
service
brake
line

pressure
differential
warning
lamp

When
a

difference
between
front
and

rear
brake
line

pressures
reaches
the
rated

range
13
to
17

kgfcm2
185

to

242
lb

sq
in
the

ground
circuit
for
the

warning
lamp

is

closed
and
the

warning
lamp
lights

IGNITION
SWITCH

WARNING

LAMP

L
E

WARNING

SWITCH

1
SERVICE

BRAKE
LINE

PRESSU
R
E

DIFFERENTIAL

WARNING

J
SWITCH

Fig
BE

42
Circuit

diagram
for
brake

warning

system

tern
Specifications

Square

type
meter
Round

type
meter

Meter
illumination

larnp
VoW
12
3
4
2
12

1
7
3

Turn

signal
pilot
lamp
VoW
12
3
4
2
12
1
7
2

Head

lamp
main
high
beam

VoW
12
3
4

I
12

17
1

pilot
lamp

Ignition
warning
lamp
VoW
123
4

I
12
17
1

Oil

pressure
warning
lamp
VoW
12
3
4

1
12
1
7

1

Hand
brake

warning
lamp
VoW
12
1
7
1

for
U
S
A

CANADA

Clock
illumination

lamp
VoW
123
4
I
12
17
2

Figure
encircled
in

parentheses
indicates
number
of
bulbs
used

BE
21

BODY
ELECTRICAL

Thermometer
and
fuel
meter

Condition

Both
therrnorneter

and
fuel
rneter
do

not

operate

Both
thermorneter

and
fuel
rneter

indicate
inaccu

rately

Thennometer
Probable

cause

Blown
off
fuse
or

improper
coo

nection

Defective

voltage
regulator
Dam

aged
fused
or

open
contact

Defective

voltage
regulator
Bro

ken
heat
wire

seized
contact
and

or

improper

grounding

Improper
cable
contact

The
thermometer
Defective
thermal
transmitter

does
not

operate

Defective
thermometer

The

pointer
indi
Defective
thermal
transmitter

cates
maximum

temperature

Defective
thermometer
Method
of

inspection

Check
the
fuse
for

fusing
and

improper
contact

Meter

operates
excessively

Meter

operates
slightly

The

pointer
deflects
when
ther

mal
transrnitter

yellow
white

ca

ble
is

grounded

The

pointer
does
not
deflect

when
thermal
transmitter

yellow

white
cable
is

grounded

The

pointer
moves
to
the
low

limit

when
the

ignition
switch
is

turned
off

The

pointer
indicates
maximum

temperature
even

after
the

ignitoD

switch
is

turned
off

BE
23
Corrective

action

Replace
after
cor

recting
the

cause
if

fused

Correct
coo

tact

The

voltage
regulator

is
combined

with
the

thermometer
to
a

single
unit

When
the

voltage

regulator
is

defective

replace
it

together
with
the

thermometer

Replace
together

with
thermometer

Check
the

cable
be

tween
fuse
and
meter

for

improper
contact

and

repair
if

required

Replace
the
ther

mal
transmitter

Replace
the
ther

mometer

Replace
the

ther

mal
transmitter

Replace
the
ther

mometer

The
thermome

ter
does
not

operate
accu

rately

Fuel
meter

Fuel

meter
does

not

operate
Defective
thermometer

Defective
thermal
transmitter

Improper
cable
contact

Defective
tank
unit

Defective
fuel
meter

The

pointer
indi
Defective
tank
unit

cates
Full

po

sition

Fuel
meter

fune

tions

improperly
Defective
fuel
rneter

Defective
tank
unit

Defective
fuel
rneter
BODY

The
thermometer
is
serviceable

when
a
100
n
resistance
is

ap

plied
to
the

thermal
transmitter

yellow
white

cable
the
cable
is

grounded
and
the
thermorneter

indicates

approximately
500C

1220F

When
the
thermometer
is
normal

through
the
above

inspection

The
thermometer

indicates

a

temperature
slightly
lower
than

the
actual

temperature

The

poin
ter

tank
unit

grounded
deflects

yellow
when
the

cable
is

The

pointer
does
not

deflect

through
the
above

inspection

The

pointer
lowers
below
the

ernpty
limit
when
the

ignition

switch
is

turned
off

The

pointer
still

indicates
Full

position
through
the

above
in

spection

The

pointer
indicates
a
half
level

when
a
35
n
resistance
is

applied

to
the
tank
unit

yellow
cable
and

the
cable
is

grounded

The

pointer
does

not
indicate
a

half
level

through
the
above
in

spection

BE
24
Replace
if
defective

Replace
the

therrnal

transmitter

Check
the
cable
from

the
thermometer
to

the
thermal
trans

mitter
for
cable

being

about

to
break

poor

contact
and

faulty

grounding
and

repair

as

required

Replace

unit
the
tank

Replace
the
fuel
me

tee
with
a
new
one

Replace
the
tank

unit

Replace
the
fuel
me

ter

Replace
if
defective

Replace
the
fuel

meter

BODY
ELECTRICAL

Improper
cable
contact

Oil

pressure
and

ignition
warning
lamps

Condition

Oil

pressure
Want

ing
lamp

The

lamp
does
not

ligh
t
when
the

ignition
switch
is

set

to
ON
Probable

cause

Blown
off

fuse
or

faulty
contact

Broken

lamp
bulb
fIlarnent
or

faulty
cable
contact

Defective
oil

pressure
switch

The

lamp
does
not
Oil

pressure
is

too
low

go
out
while
the

engine
is

being

operated
Lack
of

engine
oil

Defective
oil

pressure
switch

Ignition
warning

lamp

The

lamp
does

not

light
when

the

ignition

switch
is
set
to

ON
Blown
off
fuse
or

faulty
contact

Burnt
out

light
bulb
filarnent
or

faulty
cable
contact
The
fuel
rneter
indicates
a

level

slightly
lower
than

the
actual

level

Method
of

inspection

Check
the

fuse
for

fusing
and

faulty
contact

The

warning
lamp
does
not

light

when
oil

pressure
switch

yellow

black
cable
is

grounded

The

warning
lamp
lights
through

the

above

inspection

Inspect
the

engine
oil

pressure

system

Check
oil
level

Continuity
exists
on
the
oil

pres

sure
switch
when
the

engine
is

being
operated

Check
the
fuse
for

fusing
and

faulty
contact

The

pilot

lamp
does
not

light

when
the

voltage
regulator
con

nector
is
disconnected
the

white
red
cable
is

grounded
and

the

ignition
switch
is
set
to
ON

BE
25
Check
the
cable

from

the

fuel
meter
to
the

tank
unit
for

cable

being
about
to
break

poor
contact
and

faulty
grounding
and

repair
as
required

Corrective

action

Replace
after
corree

ting
the

fuse
the

cause
if
fused

Check
the

light
bulb

for
burnt
out
fIla

ment
and

replace
as

required

Replace
the
oil

pres

sure
switch

Add
oil

Replace
the
oil

pres

sure
switch

Repair
or

replace
as

required

Check
the
bulb
for

burnt
out
fIlament

and

replace
as
re

quired

BODY
ELECTRICAL

Improper
stop
position
of

wiper
arm
Improperly
positioned
blade
and

arm
Correct

position

Damaged
or
worn
auto

stop
point
Replace
motor

Improper
wiping
Worn

rubber
blade
Replace
blade

Inadequate
pressing
force
of

wiper

arm
Replace
wiper
arm

IGNITION
SWITCH
AND
STEERING
LOCK

CONTENTS

IGNITION
SWITCH

Removal

IGNITION
SWITCH
WITH

STEER
ING
LOCK
BE
29

BE
29

BE
29

IGNITION
SWITCH

This
3
or
4

position
switch
is
installed
on
the

ignition

switch
bracket

which
is
installed
on
the
instrument

panel

with
two
screws
and
controls
the

engine
ignition
system

and
most
of
electrical

equipment

Removal

Remove
the

ignition
switch
connector
loosen
the

ring

nut
remove
the

ignition
switch

from
the
bracket
Description

Steering
lock

replacement

Warning
switch
and

warning
buzzer
BE
29

BE
30

BE
30

Fig
BE
49

Removing
ignition
switch

IGNITION
SWITCH
WITH

STEERING
LOCK

Description

The

steering
lock
is
built
in
the

ignition
switch
When

the

key
is

set
to
Lock

position
and
rernoved
the

steering
system
is
locked

automatically
The

locking

8E
29

mechanism
is
installed
on
the

steering
jacket
tube
When

the

key
is
set
to

Lock

position
and

removed
the

steering
lock

spindle
is

inserted
in
a
notch
in

the
collar

which

is

stationarity
set
on
the

steering
shaft
to
lock
the

steering
wheel

The

ignitiun
switch

is
installed
on
the

back
of

key

cylinder
with
a

attaching
screw
and

interchangeable

tf
iY
t

7

a

1

Ignition
switch

part

2

Key
cylinder

part

3

Steering
jacket
tube

4
Lock
collar
5
Lock

pindle

6

Steering
shaft

7
Self

shear

type
screw

8

Attaching
screw

Fig
BE
50

Steering
lock

Key

position

Terminal
OFFor

GARAGE
Lock
ON

ST
ART

B

Battery

IG

Ignition

S
Starter

R
Resistance
b

1

Steering
lock

replacement

For
the

purpuse
of

tamper
proof
the
self
shear

type

screws
are

used
and
their

heads
are
sheared
off
when

installed
so
that

the

steering
lock

system
cannot
be

removed

easily
Replace
the

steering
lock

proper
in

accordance
with
the

following
instructions
when

required

Loosen

two

attaching
screws
and
break
the

remaining

twu
self
shear

type
screws
with

a
drill

or
other

proper

tool

Now
remove
the

steering
lock

proper
from
the
BODY

BE
30
steering
jacket
tube
When

installing
a
new

steering
lock

proper
be

sure
tu

tighten
two
new
self
shear

type
screws

to
shear

off
their

heads

Warning
switch
and

warnmg
buzzer

Fig
BE
51

Warning
switch

The
circuit
of
this

warning
system
is
closed

when
the

door
is

opened
with
the

steering
unlocked
because
the

door
switch
and

warning
switch

are
connected
in
series

When
the
cicuit
is
closed
the

buzzer
sounds

When

replacing
the

warning
switch
disconnect

two

cables
remove
the

cap
loosen
two

attaching
screws
and

remove
the

warning
switch

The

warning
buzzer
is
installed

on
the

back

left
side

of
the
instrument

panel
with

two

attaching
screws

FUSE
WARNING

SWITCH

WARN

BUZZ
G

n

WITCH

t

Fig
BE
52
Circuit

diagram
for

warning
system

BODY

RADIO

Removal

Remove
he
cluster
lid

2
Disconnect
the
lead
wires

from
the
radio

3
Remove
two

nuts
used
to
install
the

front
side

of
the

radio
on
the
instrument

panel

4

Loosen
two
screws
as
shown
in
the

Figure
BE
55

and
remove
the
bracket

used
to
install
the
rear
side

of
the

radio
on
the
instrument

panel

5
Remove
the

radio

Noise

prevention
chart

Run
the

engine
raise

the

antenna
set
volume
to

Condition

Apparent
cause

Ignition
system

Noise
occurs

when

engine
is

oper
High
tension

code

ated

Ignition
coil
i

O

i

M

1
iiJ

1
7

L
l

o
f

I
ft

V

r

1
1
v

I

I

t

i

J

iL

1

Power
soutee
cable

Blue
white
cable
of

harness

2
Power
source
cable
Radio

3

Speaker
cables
4

Antenna
cable

5

Single
pole
fuse

6

Spare
fuse

7

Attaching
screws

Fig
BE
55

Removing
radio

maximum

and
set
the

dial
at

a
medium

point
without

catching

broadcasting
wave

Repair

High
tension

code

may
be
dis

regarded
because
noise

suppressor

is
used

Apart
the

choke
wire

frorn
the

ignition
coil
as

far
as

possible

Install
a
0

5
uF

capacitor
in

primary

side
terminal
of

ignition
coil

Note
8e
careful
not
to
install

capacitor
in

secondary
or

primary
breaker
side
or

otherwise
the

engine
be

comes

improper

Connect
wire
between

engine
and

ignition
coil

locating
area
of

body

with
bond

BE
32

BODY

ELECTRICAL

Distributor
Secure

ground
of

ignition
coil

Secure
contact
of

carbon
electric

pole
and

rotor

Eliminate
excessive

tip
on
the

rotor

pole
or

cap
pole
by
scrubbing
with

a
screwdriver

Check

stagger
between

rotor
and

stator

Charging

system

Sound
of

alternating
current

pre

sents
Alternator
Install
a
0
5

l
F

capacitor

on

charging
terminal
A

Note
Do
not
use

capacitor
ex

cessively

If

capacity
is
used
ex

cessively
the
alternator
coil

will
be
broken

When

the
accelerator

pedal
is
de

pressed
or
released
noise

presents
Regulator
Install
a
0
5
l
F

capacitor
on
A

terrninal
of
the

voltage
regulator

Supplement
equipment

When

engine
starts
noise

presents

Noise

still

presents
even
after

stopping
the

engine
Operative
noise

of
ther

rnometer
and
fuel

gauge
Install
0
1
l

F

capacitor
between

terminal
and

ground
wire

Note
If

a

capacitor
having
ex

cessive

capacity
is
used
indi

cation
of
meter
will
be
devi

ated

Noise

presents
when
horn
is
blown

Horn
Install
a
0
5

IF

capacitor
on
the

horn

relay
terminal
or
horn

switch

Noise

presents
when
turn

signal

lamps
are

operated
Flasher
unit
Install
a
0

5
l
F

capacitor

Note
a
Be

sure
to
locate

capacitor
most
near

position

of
noise

source
and

connect
in

parallel
completely

d
Make

installation
and

conneCtion

securely

b

Cut
lead

wire
as
short
as

possible

c
Ground
wire
should
be

placed
on
the

body
e

Carefully
identify

marks
IN
or
OUT

BE
33

EMISSION
CONTROL
AND
TUNE
UP

EMISSION
CONTROL
SYSTEM

AN
D

ENGINE
TUNE
UP

CONTENTS

BASIC
MECHANICAL
SYSTEM
ET

Checking
and

adjusting
dash

pot

Adjusting
intake
and
exhaust
valve
automatic
transmission
model

only
ET
9

clearances
ET
1

Checking
carburetor
return

spring
ET
9

Checking
and

adjustin9
drive
belt
ET
2

Checking
choke
mechanism
choke
valve

Retightening
cylinder
head
bolts
manifold
and

linkagel
ET
9

nuts
and
carburetor

securing
nuts
ET
2

Checking
anti

dieseling
solenoid
ET
9

Checking
engine
oil
ET
2

Replacing
fuel
filter
ET
10

Replacing
oil
filter
ET
3

Checking
fuel
lines
hoses

pipings

Changing
engine
coolant
L
L
C
ET
3
connections
etc
ET10

Checking
cooling
system
hoses
and
THROTTLE
OPENER

CONTROL
SYSTEM

ET
10

connections

ET
4
Checking
and

adjusting
throttle

opener
ET
13

Checking
vacuum

fittings
hoses
and
TRANSMISSION
CONTROLLED
VACUUM

connections

ET
4
ADVANCE
SYSTEM

ET
17

Checking
engine
compression
ET
4
Checking
electrical
advance
control

system
ET
19

Checking
exhaust
manifold
heat
control
AUTOMATIC
TEMPERATURE
CONTROL
AIR

valve

ET
5
CLEANER
A
T
C
AIR
CLEANER

ET
20

IGNITION
AND
FUEL
SYSTEM

ET
5
Replacing
carburetor
air
cleaner
filter

ET
20

Checking
battery
ET
5
Checking
hot
air
control
valve

ET
20

Checking
and

adjusting
ignition
timing

ET
5
CRANKCASE
EMISSION
CONTROL

Checking
or

replacing
distributor
breaker
SYSTEM

ET
22

point
condenser
and

spark
plugs
ET
6
Checking
or

replacing
PCV
valve

ET
23

Checking
distributor

ignition
wiring
and

Checking
ventilation
hoses

ET
23

ignition
coil

ET
7
EVAPORATIVE
EMISSION
CONTROL

Checking
distributor

cap
and
rotor

ET
7
SYSTEM
ET
23

Adjusting
carburetor
id
Ie

rpm
and

Checking
engine
compartment
hose

mixture
ratio

ET

8
connections
and
fuel

vapor
control
valves
ET
23

Checking
fuel
tank

vacuum
relief
valve

operation
ET
24

BASIC
MECHANICAL
SYSTEM
1
Start

engine
and
run
it

until
it
is
heated
to

operating

temperature
or
at
least
more
than
800C

I760F
of

engine
oil

temperature
then

stop
engine
Adjusting
intake
and
exhaust

valve
clearances

Valve
clearance

adjustment
should
be
made
while

engine
is

stationary

To

adjust
proceed
as
follows
2
Rotate
crankshaft
to

bring
No
1

cylinder
in

top
dead

center
on
its

compression
stroke

3

Remove
valve
rocker
cover

to

gain
access
to
valve

ET
1

EMISSION
CONTROL
AND

TUNE
UP

reading
cylinders
through
spark
plug
hole

Repeat

compression
check
on
these

cylinders

1

If

compression
improves
considerably

piston
rings

are
defective

2
If

compression
does
not

improve
valves
are

sticking

or

seating
improperly

3
If
two

adjacent
cylinders
indicate
low

compression

and

injecting
oil
on

pistons
does
not
increase

compres

sion
the

cause

may
be
a

cylinder
head

gasket
leak

between
the

cylinders
Engine
oil
and
coolant

in

cylinder
could
result
from
this

problem

Compression
pressure

12
S
to
14
S

kg
cm2

178
to

206

psi
at
3S0

rpm

Checking
exhaust
manifold
heat

control

valve

Check
heat

control
valve
for

proper
operation
If
it

does
not

operate
properly
trouble
is
due
to

excess
carbon

on
shaft
or

damaged
shaft
Clean
if

necessary
The
bimetal

should
be
also
checked
for

proper
function

IGNITION

AND

FUEL
SYSTEM

Checking

battery

Check

electrolyte
level
in
each

battery
celL

L

Unscrew
each

filler

cap
and

inspect
fluid
leveL
If

fluid

level
is

low
add

distilled
water
to

bring
level

up
to

app
roximately
10
to
20

mm
0

3937
to
0
7874
in
above

plates
Do
not
overfilL

2
Measure

specific
gravity
of

battery
electrolyte
ET002

Fig
ET
B

Checking
the

specific
gravity
of

battery
electrolyte

Permissible
Full

charge
value

value

at
200C
68OF

Frigid
climates
Over
1
22
1
28

Tropical
climates
Over
1
18
1
23

Other
climates
Over
L
20
1
26

Clean
the

top
of

battery
and
terminals
with
a
solu
lion

of

baking
soda

and
water
Rinse
off
and

dry
with

compressed
air

The

top
of

battery
must
be
clean
to

prevent
current

leakage
between
terminals
and
from

positive
terminal
to

hold
down

clamp

In
addition
to
current

leakage
prolonged
accumulation

of

acid
and
dirt
on
the

top
of

battery
may
cause

blistering

of

the
material

covering
connector

straps
and
corrosion

of

straps
After

tightening
terminals
coat
them
with

petro

laturn

vaseline
to

protect
them
from
corrosion

Checking
and

adjusting
ignition

timing

I

Check

spark

plugs
and
distributor
breaker

points
for

condition

2

Thoroughly
wipe
off
dirt

and
dust
from

timing
marks

on
crank

pulley
and
front

cover

3
Warm

up
engine
sufficiently

ET
5