1973 DATSUN B110 ECU

Removal

I
t

is
recommended
that
the
door
be
removed

from
the

body
with
the

door

hinges
attached
on
the

door

although

the

door
may
be

removed
from
the

body
with

or
without

the

hinges
attached
on

the
door

Front

door

Remove
the

package
tray

2
Remove
the

door

hinge
service
hole
cover

from
the

dash
side
trim

3
With
the

door

fully

opened
support
the

door

by

applying
a

stand
or

jack
beneath
the

door
so
that
the

door
does
not

drop
off

Note

Apply
a

piece
of

rag
between
the

door
and
stand
so

that

the
door

panel
is

protected
from

damaging

4
Remove
the
door

hinge
installation
bolts

at
the

body
side

by
the
use

of
a

box
wrench
and

remove
the

door

from
the

body

Fig
BF
45

Removing
front
door

Dash
side
trim
without

door

hinge
sevice
hole

Rear

door

Remove
the

kicking
plate

2
Peel

off
the

body
side
welt

and
remove
the
center

pillar
finish
BODY

3
Hereinafter

follow
the
instructions
for

the
front

door
and
remove

the
rear

door

11

I

fl
C

I
r
r

I
W
I
r

I

I
dl
J

Ik

I
h
I

l
i

J

n

Fig
BF
46

Removing
rear

door

Adjustment

Door

hinge

Loosen
the
bolts

used
to

secure
the

hinge
to
the

body

adjust
the

door

upward
downward
forward
or
rear

ward

position
as

required
and

retighten
the
bolts

securely

Adjustable

range
6
mm
0

2362
in

Tightening
torque

Hinge

pillar
installation
bolt
1
6

kg
m
11

6
ft
lb

Hinge
door
installation
bolt
1

6

kg
m
11

6
ft
lb

Note
a
When

installing
the

hinge
grease
the

hinge
link

b
Oil

top
of
the

hinge
pin
when
the
door

squeaks

while

opening
or

closing

Striker

Another
method

to

adjust
the
door

loosen
the
striker

fixing
screw
and

adjust
the
striker

position

Adjustable
range
6

mm
0

2362
in

Tightening
torque

Striker
installation

machine
screw

0
12
to

0
2

kg
m
0
7
to
I
4

ft
lb

BF

26

Fig
BF
47

Adjusting
striker

DOOR
TRIM

For
both
the

front
and
rear
doon
the
door
trims

may

be

removed
and
reinsbJled
in
the

same
method

Removal

I
When

removing
the
door

regulator
handle
lock
inside

handle
escutcheon
and
arm
rest
remove
their

installation

screws

2

When

removing
the

ash

tray
outer
case
remove
the

ash

tray
and

remove
the
installation
screws

3
The

door
finish
is
secured
on
the
door

with

clips

When

removing
the

door
finish

pull
it

toward

you

DOOR
LOCK
MECHANISM
BODY

I
I
Regulator
handle

Imide
handle
escu
tcheon
131
Armrest

Fig
BF

48
Door

trim

III
I
2
Outer

case
Ash

tray

Fig
BF
49

Removing
ash

tray

1
1

Door
lock

2

Spring

3

Inside
handle

4

Locking
plate

5

Locking
plate
spring

6

Stopper

7

Outside
handle

8
Ou
tside
handle
rod

9

Nylon
nut

10
Escu
tchcon

11

Knob

grommet

12

Door
lock

knob

13

Door
lock

cylinder

Fig
BF
50
Front
door
lock
mechanism

SF
27

IT
f

r

J

e

@
@
BODY

Door

lock

2

I
nside
handle

3
Escu

tcheon

4

Door
lock

knob

5

Knob

grommet

Front
door
lock
removal
Fig
BF
51

Rear
door
lock
mechanism

Remove
the

parts
up
to
the
seal
screen

2
Remove
the
door
lock
knob
and
then
remove
the

remote
control
rod
used

to
connect
the
door
lock
to
the

door
lock

cylinder
from
the
door

lock

cylinder

3
Remove

the
inside
handle

installation
screw
and
the

door
lock

assembly
installation
screws
and

withdraw
the

outside
handle
rod
from
the

opening
on
the
lock

assembly
Remove
the
lock

assembly
from
the
service
hole

on
the
inside

panel

I
I
Lock

knob

Inside
handLe

I
3

I
Lock

assembly

Fig
BF
52
Door
wUhout

sealing
screen

4
Detach
the
leaf

clip
used
to

secure
the
lock

cylinder

on
the
door
and
remove
the
lock

cylinder
Fig
BF
53

Removing
front
door
lock

Front
door
lock
installation

1

Installing
the
inside
handle
and
remote
control

Adjust
position
and
install
the
remote
control
so
that

the

Slopper
@
ofthe
inside

handle

Q
lightly
contacts

the
base

plate
of
the
door

lock

CD

If
the

remote
control
is

installed
with
the

inside
handle

Q
pulled
the

locking
plate
@
doesnotintermesh
with

the
ratchet

completely
at
the
full
ratch
and

the
lock
knob

j
does
not
lower

2
Connecting
outside
handle
to
the

locking
plate

Set
the

locking
plate
@lto
the

fully
ratched

position

insert
the

nylon
nut

@
on
the
end
of
the
outside
handle

rod

ID
into
the

locking
plate
hole

@
and

adjust
and

secure
the

nylon
nut

@
with
adhesive
in
a

position
where

BF
28

the
outside
handle
rod

@
is

provided
with
2

to
3
mm

0

0787
to
0

1181
in

play
in
the

stroke

If
the

nylon
nut

@
is

positioned
too

low
the

locking

plate
@
is

depressed
at
the
full
ratch
the

locking
plate

does
not
intermesh
with

the
ratchet

completely
and
the

knob
cannot
be
locked
If

play
in
stroke

of
the

outside

handle
rod

@
is
excessive

may
be
unlocked

up
to
5

mm

0
1967
in
stroke
of
the

outside
handle
will
be

insufficient

If

the

nylon
nut
is
loosened
the
above
described

trouble

occurs
Be
sure
to
secure
the
nut

completely
by

means
of
adhesive
Check
the

springs
@
and

@
for
rust

and

replace
as

required

Tightening
torque

Door

lock
installation

screw

0
12
to
0
2

kg
m
0

9
to
I
4
ft
lb

Door
lock

remote
control

installation
screw

0
12
to
0
2

kg
m
0
9
to
14
ft
lb

Outside
handle
installation
nut

0
2

to
0
3

kg
m

1
4

to
2
2

ft
Ib

Rear
door
lock
removal

1
Remove
the

parts

up
to
the
seal
screen

2
Raise

the
door

glass
to
the

top
and
remove
the

door

DOOR

GLASS
AND

REGULATOR

i

v
BODY

lock

knob

3

Remove
the

bell
crank

installation
screw

Hereinafter

the

instructions
for
removal
of
the

front

door
lock

apply

Fig
BF
54
Door

without

sealing
screen

Rear
door
lock
installation

Install
the
rear
door
lock
in
reverse

sequence
of

removal

Note

Except
for

the

precautions
for
outside
handle
the

precautions
for
the
front
door
lock

apply

AD

1
Front
door

panel

2

Glass
run

rubber

3
Door

window

glass

4

Glazing
rubber

5

Bottom
channel

6
Door

ventilator
frame

7

Ventilator

glass
channel

8
Catch
handle

9
Door
ventilator

glass

10

Pivot
bracket

11
Door
ventilator

weatherstrip

12

Glass
run
rubber

13
Front
window

regulator

14
Door

handle

washer

15
Door

window

regulator
handle

Fig
BF
55
Front

door

glass
and

regulator
construction
4

door
Sedan

SF

29

Fig
BF
82

Removing
rear
seat

cushion

2

With
the

seat
back
turned
down

remove
two

screws

from
the
wheel
house
and

remove
the

seat
back

111
I

V

RH

0
1

lr

Fig
BF
83

Removing
rear
seat
back

Reinstallation

Reinstall
the

seat
cushions
and
seat
backs
in
reverse

sequence
of
removal

SEAT
SWITCH

Inspection

Seat
switch

should

operate
accurately
Prior
to

inspecting
seat
switch
disconnect
harness

I
Place
standard

weight
on
the

illustrated

position
of

assistant

seat

Note
Put

weight
on
shadowed

area
See

Figure
BF
84
BODY

Fig
BF
84

Weight
position
Unit
mm

in

L
130
15
118
for
SEDAN

140
5
512

for
COUPE

2

Using
test

light
check
whether

light

grows
when

II

kg
24
25
lb

weight
is

on
and

light

goes
out
when

1
0

kg

3
2
J
lb

is

on

Installation

I

Seat
switch

should
be
installed

right
position
See

Figure
BF
85

2
Install

seating
switch
to

5th
5

crest
of

spring
at
rear

of
4th

spring
as
viewed

from
inner

side
Then
set

it

between

cushion

pad
and
cushion

spring
and

clip
to

cushion

spring
by
hook
of
switch
case

3

Install
lead
wire

fastner
to
cross
bar
hole
of
4
mm

0
157
in

securely

DETAIL
B
@

ui
DETAIL
A

n

@

ID

E

l

1
Lead
wire
fastener

2
Cross
bar

3
Seat
switch

4
Cushion

spring

5
Cushion

pad

Fig
BF
85
Seat
switch
location

BF
40

7
Remmre
three

screws
from

top
of
the
instrument

one
each
installation
bolt
frorn
both
sides
of
the
bottorn

and
two
bolts
used
to
secure
the
instrument

panel

together
with
the

steering
column
clamp

8

Raising
the
instrument

panel
slightly

pull
it
toward

rear
side
of
the

vehicle
and
remove
it

Note

Ensuring
that
all
cables
are
disconnected
remove

the
instrument

panel
slowly
aoo

carefully

REINSTALLATION

Reinstall
the
instrument

panel
in
reverse

sequence
of

removal
BODY

Fig
BF
90
Removing
instrument

panel
II

ROOM
TRIM

INSTALLING
HEAD
LINING

IA

P

AV

FRONT

A
A
IB
A

L

Adhesive

Detailed
view
of

A

portion

B
B

Be
sure
to
hook
the

clamp
securely

Fig
BF

91

Installing
head

lining

Note
Be

sure
to
install
the
roof
insulator
before

installing
the
head

lining
J

BF
43

INSPECTION

Referring
to
the

wiring
diagram
check
the

wiring

harness

for
connection
with
electrical

equipment
and

connector
for
conned
ion
and
installation
When

checking

the

wiring
harness

note
the

following
matters

Connected
unit
should

not
be

loose
rusted
or

contaminated

2

Cable
insulator
cover
should
not
be

damaged
crack

ed
or

insulating
material

should
not
be
deteriorated

3
For
those

parts
which

are

grounded
through
the

installation

bolts
the
bolts
should
be
in
contact
with
the

body
completely
so
that

continuity
is

provided
in

between
the

body
and
bolts

4
Terminals

of
unit

through
which

current
flows

should
not
come

into
contact
with

other
metal

parts

5
No

erroneous
connection
should
be

present

DESCRIPTION

When
an
overcunent

exceeding
the
rated

amperage

flows
to
a
circuit
the

fuse
is
heated
and
melted
the

circuit
is

interrupted
and

thus
cables
and

electrical

equipment
are

protected
from

damaging
due
to

burning
or

damaging
is

limited
to
the

minimum
This
vehicle

is

equipped
with
six

fuses
and

one
fusible
link
The
fuses

are

located

in
the

fuse
box
and
used

to

protect
illumination

signal
and
other

systems
and
the
fusible
link
is

adopted

in
the
cable
between
the

battery
and
alternator
to

protect

the

charging
and

starting
circuits

FiJ
BE
16
Fuse
box
BODY

6
Cables
should
be

damped
so
that

they
do
not
come

into
contact
with

sharp
corner
or

part
lernperature
of

which

rises

highly

7
Cables
should
be

securely
clamped
in

posItions

sufficiently
separated
from

rotating
parts
such
as
fan

pulley
fan
belt

etc

8
Cables
should
be

provided
with
an

optimum
extra

length
at
sections

stationarity
on
the

body
or
at
sections

where
vibration

occurs
due
to

engine
operation
and

others

Note
a
When

inspecting
or

performing
other
mainte

nance

service
and
no

power
supply
is

required

particularly
or
when
it
is

anticipated
that
a

part

may
be
short
circuited
disconnect
the

battery
H

terminal

b
In
no
event
should
an
unloaded
circuit
be

directly
connected
with
ground
Be
sure
to
use
a

test

lamp
or
circuit

tester

fUSE

Fig
BE
17
Fusible
link

INSPECTION

In
the

most

cases
fuse
can
be

checked

visually

However
when

it
is
difficult
to

check

visually
a
circuit

tester

may
be
used

The
fusible
link
can

be

inspected

visually
or

by

feeling
on

finger

tip
However
the
fusible

link
can
be

inspected
more

correctly

by
using
a
circuit

tester

BE

6

9HORN
r
I

01

8ATTERY

HI

IGI

s

ILl

C
iORN
BODY

FUSE
H

S
HORN
BUTTON

BGI

J
H

B
S

Il

I
n6lm

I

L
J
L

HORN
RELAY

Fig
BE
3l
Circuit

diagram
for
hom

syrtem

HORN

Removal

Remove
the
connector
loosen
the

fixing
nut
in
the

horn
center
and

remove
the
horn

unit

Adjustment

1

Secure
the

horn
unit
in
a
vise

and
connect
cables
as

shown

in

Pigure
BE
32

AMMETER
110
to
15AI

Isw
f

@

113
I

VOLTMETER

I

15
to

20VI

BATTERY
HORN

Fig
BE
32
Circuit

for
ham

adjustment

2
Set
the

switch
to

ON
and
rnake
sure
that
the

voltmeter
indicates
12
to
12
5

V

3

Listening
the
horn
for
sound
level
volurne

and
tone

adjust
sound

properly
so

that
the
amrneter
indicates
the

rated

amperage
The

adjustment
is

made

by
turning
the

adjust
screw
after

loosening
the
lock
nut
Fig
BE
33

Adjusting
hom
IIOlume

Note
When
the

adjust
screw
is
turned

Clockwise

Counterclockwise
Current
increases

Current
decreases

4

When
a

proper
sound
is

obtained

through
the
above

adjustment
rnake
sure
that
the

proper
sound
can
be

obtained
at

voltage

generated
by
the
alternator
14
to

l5V

5
Lock
the

adjust
screw
with
the

lock
nut

Consumed
current

adjusting
value
A

Sound

Plat

type
Spiral
type

High
H
2
5
390
5

0
440

Low

L
2
5

330
5
0
350

Figures
encircled
in

parenthesis
are
basic

frequencies

Hz

BE

16