ECU DATSUN 210 1979 Service Manual

DESCRI

PTI
ON

Cabl
are
covered
with

color
coded

vinyl
for

easy
identification
In
the

wiring
diagram
olors
are

indicated

by

one
or
two

alphabetical
letters

It
is
recommended
that
the

battery

be

disconnected
before

performing

any
electrical
service

other
than

bulb

or

fuse

replacement

In

addition
to

fuses
a
fusible

link

has
been

installed
to

protect

wiring

Circuit

system

Starting
and

ignition
system

Charging
system

Lighting
system

Signal
system

Instrument

system

Others

Grounding
system

The
main
cable

of
each

system
is

generally
coded
with
a

single
color

These

colors
are

represented
by
such

letters
as
G
W
or
Br
Minor
items
of

each
circuit
s

terminal
are
coded

with

a
two
tone
color

as
follows

BW
Black
with
white

stripe

LgR

Light
green
with
red

stripe
Body
ectrical

System

BODY
ELECTRICAL

WIRING

The

fusible
link

functions

almost
the

same

as
a

fuse

though
its

characteris

tics
are

slightly
different
than

normal

fuses

CABLE
COLORS

Cable
colors
are

generally
used

as

shown
in

the

following
table

Color

B

Black

W

White

R

Red

G

Green

y

Yellow

L
Br

Lg

Blue
Brown

Light
green

B

Black

INSPECTION

Inspect
all

electrical
circuits

Ie

Terring
to

wiring
or
circuit

diagrams

Circuits
should
be

tested
for
continui

ty
or

short
circuit
with
a
conventional

test

lamp
or

low

reading
voltmeter

Before

inspecting
circuit
ensure
that

I

Each
electrical

component
part
or

cable
is

securely
fastened
to
its
con

nector

or
tenninal

2

Each
connection
is

fIrmly
in

place

and

free
from
rust

and
dirt

BE

2
3
No

cable

covering
shows

any
evi

dence
of

cracks

deterioration
or
other

damage

4

Each
terminal
is
at
a
safe
distance

3
Vay
from

any
adjacent
metal

parts

5

Each
cable
is
fastened
to

its

proper
connector
or

terminal

6

Each

grounding
bolt
is

fumly

planted

7

Wiring
is

kept
away
from

any

adjacent

parts
with

sharp
edges
or

high

temperature
parts
such
as
exhaust

pipe

8

Wiring
is

kept
away
from

any

rotating
or

working
parts
fan

pulley

fan
belt
etc

9
Cables
between
fIXed

portions

and

moving

parts
are

long
enough
to

withstand
shocks
and

vibratory
forces

Note

a
Before

starting
to

inspect
and

repair

any

part
of
electrical

system
or

oth
parts
which

may
lead
to

a

short
circuit
disconnect
cables
at

battery
terminals
as
follows

Disconnect
cable
at

negative

terminal

and
then
disconnect
cable

at

positive
terminal

Before

connecting
cables
to

battery

terminal
be

s
1
to
clean
tenninals

with
a

rag
Fasten
cable
at

positive

t
minal
and
then

ground
cable

at

negative
tenninal

Apply

grease
to

top
of
these
terminals
to

prevent
rust
from

developing
on

them

b
Ne
use
a

screwdriver
or
service

tool
to
oonduct
a

oontinuity
test

Use
test
leads

Co

Nev
ground
an

open
circuit

or

circuits
under
no
lood
Use
a

test

lamp
I2V

3W
or

circuit
tester
as
a

lood

FUSE
AND

FUSIBLE
LINK

MAINTENANCE

INSTRUCTIONS

Fuse

The
fuse

block
is
installed

under

the

instrument

panel
on

driver
s
side

Body
Electrical

System

DISASsEMlU
Y
AND
ASSEI
t18LV

BE126D

Fig
BE
21

Combination
Meter

TACHOMETER
7
Install
tachometer
in

the
reverse

order
of
removal

REMOVAL
AND

INSTALLATION

I

Disconnect

battery

ground
cable

2
Remove
combination
meter

3

RemO
e

speedometer
reset
knob

4

Disconnect
tachometer

connector

from

printed
circuit
board
terminal

5
Remove
screws

securing
printed

circui
t

board

6
Remove
tachometer

by
loosening

retaining
screws
BE744C

Fig
BE
22
Tachometer

BE
14
FUE
LEVELAND

WATER

TEMPERATURE

INDICATOR
SYSTEM

REPLACEMENT

G11l1ge

I
Remove
combination
meter

2
Disconnect

harness
connector

from
terminal
on

printed
circuit

board

3
Remove

retaining
screws

4
Install
new

gauge
in
the
reverse

order
of
removal

Fuel
tank

gauge
unit

Fuel

tank

gauge
unit
is
located
on

fuel
tank

Refer
to
Fuel
Tank

Gauge

Unit

Section
FE
for
removal

and

installation

Thermal
transmitter

I
Disconnect
lead
wire

from
termi

naL

2
Remove

thermal
transmitter

by

loosening
it

oountercIockwise

3

Install
new
thermal
transmitter
in

the
reverse
order
of
removal

Note
Be
aure

to

apply
conductive

sealer
to
threads

prior
to

installing

new
hennal
transmitter

Seat
belt
wammg

timer
unit

1
Disconnect

battery
ground
cable

2
Remove
L

A
dash
side
finisher

3

Disconnect
b
arness
conn
ctor

4

Remove
timer
unit

attaching

screw

S
Install
timer
unit
in

the
everse

order
of

removal

BE1290

Fig
BE

27
Seat

Belt

Warning

Timer
Unit

Seat
belt
switch

I

Disconnect

battery
ground
cable

2

Slide
seat
all
the

way
forward

3

Disconnect
harness
connector

4

Remove
inner

seat
belt

by
re

moving

securing
bolt

5
Install
inner

seat
belt
in

the
re

verse
order
of
removal

BE31QC

Fig
BE
28
Driver
s
Inner

Seat

Belt
Body
Electrical

System

INSPECTION

Warning
buzzer

BE308C

Fig
BE

29
Warning
Buzzer

Seat
belt

warning
timer
unit

Seat
belt

warning
timer

unit

I
Y

o

j

r
tIT
I

Connect
terminal

j
to

negative

terminaI
of
DC
12
volt

power

supply

2
Connect

terminal
to

positive

terminal
of
DC
12
volt

power

supply

Buzzer

should
sound
intermit

tent

y

3

As
to

terminal

@
and

@
con

nect
to

positive
terminal
of
DC
12
volt

power
supply
respectively

Buzzer

should
sound
intermit

tently

Note
Make
sure
that

negative
termi

nal
of
DC
12

volt

power

supply
is

a1ways
connected
to
tenninal

CD

Q

e
Battery
t2V

Lamp
3
4W

BE312C

Fig
BE
30

Checking
Seat
Belt

Warning
Timer
Unit

Seat
belt

switch

Test

continuity
through
driver
s

seat
belt
switch
with
a

test

lamp
or

ohmmeter

There
should
be

continuity
be

BE

16
tween

two
terminals
when
the
seat

belt
is
unfastened

Conversely
there

should
not
be

continuity
when
fasten

ed

CAUTION

Before

starting
to
work
on

any
part
of

electrical

system
disconnect

battery

ground
cable

WINDSHIELD
WIPER

AND

WASHER

REMOVAL
AND

INSTALLATION

Wiper
motor

I

Disconnect

battery
ground
cable

2
Disconnect
harness

connector

3

Remove

wiper
motor

attaching

bolts

4

Remove
motor
arm

attaching
nut

securing
motor
arm
to

motor
shaft

BE683C

Fig
BE
31

Removing
Wiper
Motor

CAUTION

Be
careful
not
to
bend

linkage
during

removal

Wiper
motor
can
then
be
detached
Body
Electrical

System

ELECTRICAL
ACCESSORIES

Wiper
linkage

Fig
BE

32

Wiper
Linkage

Windshield
washer

J

I
d4

ID
1
Washer

nozzle
R
n

2

Washer
nozzle
L
U

3
Wuher
tube

4

Washer
tank

5
Washer
motor

BE762C

Fig
BE
33
Wind
hield
Washer

Bend

pipe
with

a
suitable

tool

4

Unit
mm
in

BE130D

Fig
BE
34
Nozzle

Adju
tment

BE
17

CAUTION

a
Be
sure
to
use

only
windshield

washing
solution

Never
mix

soap
powder
or
deter

gent
with
solution

b
To
avoid

improper
windshield

washer

operation
do
not

operate

windshield
washer

continuously
for

more
than
30
seconds
or
without

washer
fluid

Normally
windshield

washer
should
be

operated
for
10

seconds
or
less
at
one
time

Wiper
and
washer
switch

When

removing
wiper
and
washer

switch
remove

combination
switch

Refer
to

Lighting
and
Turn

Signal

Switch

BE131D

Fig
BE
35

Wiper
and
Wll5her

Switch

INSPEctiON

Wiper
motor

W
P

6

LJ
3

B

gu

BE132D

Fig
BE
36

Wiper
Motor
Unit
Body
Electrical

Sys
em

I

There
should
be

continuity
at

the

following
terminals

Between

ill
and

@
@
and

CID

@
and@

2
Then

securely
connect
positive

terminal

of
a
2
volt
DC

power
supply

to
terminal

@
and

ground
terminal

CID
Wiper
motor

should
run

3
Next

ground

terminal@
Do
not

Wiper
and
washer
switch

t3
11
17

I

7b

14
16

REAR
WINDOW

WIPER
AND

WASHER

REMOVAL
AND

INSTALLATION

Wiper
motor
unit

Disconnect

battery
ground
cable

2

Remove

wiper
arm
from

pivot

shaft

by
loosening

wiper
arm

attaching

bolt
after

raising
wiper
blade
from
rear
o

i

Jill

BE1B
ground
terminal

CID
this
time

Wiper

motor
should
run

4
Ground
either

terminal

CID
or

@

to

keep

wiper
motor

running

Chec
k

continuity
between
termi

nals

ill
and@

Continuity
should

repeat
ON
and

OFF

periodically

W

PE
I
WASH

DFF
lOW

HI
PUSH

11

0

116

117
o
g

b

BE1330

Fig
BE
37

Wiper
and

WcuherSwitch

window

glass

3

Remove

tailgate
finisher

and
seal

ed

screen

4
Disconnect
harness

connector

5

Remove

wiper
motor
unit

from

tailgate
by
removiDg
attaching
bolts

6

Install

wiper
motor
unit
in

the

reverse
order
of
removal

Install

wiper
arm
in
correct

installa

tion

angle
to
obtain
correct

sweeping

wQes

BE134D

Fig
BE
38

Removing
Rear

Wiper
Motor

Rear

wiper
and
her
awltch

V

D
mn
ID

I

INSPECTION

Wiper
motor

Wiper
motor

unit
is
made

up
of
a

motor
and
an
auto
stop
mechanism

Inspect
wiper
motor
unit
as
fol

lows
See
Fig
BE
42

I
Th

re
should
be

continuity
be

tween
the

following
terminals
Body
Electrical

System

ill

BE752C

Fig
BE

41
Rear

Wiper
and
Washer
Switch

Between

@
and

@
@
and@

2
Then

securely
connect

positive

terminal
of
a
12

volt
DC

power
supply

to

tenninal

@
and

ground
terminal

@
Wiper
motor
should
run

3

Keep

wiper
motor

running

Check

continuity
between

@
and

@

Continuity
should

repeat
ON
and

OFf

periodically

I

Rear
wiper
and
waaher
switch

Test

continuity
through
wiper
and

washer
switch
at
each
step
with
a
test

lamp
or

ohmmeter
See
Fig
BE
41
cv

@

CD

BE753C

Fig
BE

42
Rear

Wiper
Motor

CIGARETTE

LIGHTER

REMOVAL
AND

INSTALLATION

I

Disconnect

battery
ground
cable

BE

20
Remove
comole
box
if

equipped

Remove

lead
wire
terminals

Remove

retaining
nut

Remove

lighter
from
cluster
lid
2

3

4

5

A

6
Install

cigarette
lighter
in
the
re

verse
order
of
removal

BE757C

Fig
BE
43

CiI
a
tto

Lighter

RADIO

REMOVAL
AND

INSTALLATION

Radio
receiver

I
Disconnect

battery
ground
cable

2

Remove
cluster
lid
A

3
Remove

radio
with
bracket

by

loosening
attaching
screws

4

DiscOnnect
harness
connector
and

antenna
feeder
cable

5

Install
radio
receiver
in
the
re

verse
order
of

removal

JL
J

tf

BE759C

Fig
BE
44

Removing
Radio

Speaker

I

Disconnect

battery
ground
cable

2
Remove
radio
receiver

3

Disconnect
harness
connector

4
Remove

speaker
by
loosening
at

taching
nuts

5
Install

speaker
in

the
reverse

order
of
removal

IJi

Ir
c

r

I

BE192C

Fig
BE
66

Removing
Water
Cock

ADJUSTING
HEATER

CONTROL

AIR
MIX
DOOR

I

Set
TEMP
lever
at
maximum

HOT

position

2

Push
air
mix

door
lever
in

direc

tion
of

arrow
and

press

temperature

control
cable
outer
case
in
direction
of

TEMP
lever
While

doing
so
secure

outer
case
with

clip

BE252C

Fig
BE
67

Adjusting
Air
Mix
Door

Note
Make
sure
that
water
cock
is

fully
closed
when
TEMP
lever
is
in

maxilnum
COLD

position
Body
Electrical

System

VENTILATION
DOOR

I
Set
AIR

lever
at

RECIRC

posi

tion

2
Push
ventilation
door

relay
lever

in

direction
of
arrow

to
shut
out
air

flow
to
center
outlet
and

press
venti

lation
door
control
rod
into
relay
lever

clamp

BE253C

Fig
BE
68

Adjusting
Ventilation

Door

Note
Make
sure
that

ventilation
door

is

fully

open
when
AIR

lever
is
in

VENT

position

AIR
INTAKE
DOOR

Set
AIR
lever
at

OFF

position

2
Push
air
intake
door

lever
in

direction
of
arrow
to
shut

out
outside

air
flow
and

press
air
intake
door

control
cable
outer
case
in
direction
of

AIR
lever

While

doing
so
secure
outer

case
with

clip

BE255C

Fig
BE
69

Adjusting
Air
Intake

Door

BE

27
Note
Make

sure
that
air
intake

door

is

fully
open
outside
air
can

flow

into

air
intake
case
when
AIR
lever

is
in
VENT

position

FLOOR
DOOR

Set
AIR
lever
at

OFF

position

2

Push
floor
door
lever
in
direction

of

arrow
to
shut
out
air
flow

to
floor

and
defroster
and

press
floor
door

control
cable
outer
case
in
direction
of

AIR

lever
While

doing
so
secure
outer

case
with

clip

BE256C

Fig
BE
70

Adjusting
Floor
Door

Note
Make

sure
that
floor
door
is

fully

open
air
flows

to
floor
and

defroster
when
AIR
lever
is
in

HEAT

position

DISASSEMBLY
AND

ASSEMBLY
OF

HEATER
UNIT

Remove

heater
uni
t

2
Disconnect
heater
core
inlet
and

outlet
hoses

by

loosening
hose

clamps

3
Remove

clips
securing
front
and

rear
heater
cases
and

separate
them

4

Take
out
heater
core

5
Assemble
heater
unit
in
the

re

verse
order
of
removal

Air

Conditioning

6
Loosen
the
connection

at
the

center

fitting
of

manifold

gauge
for
a

Clockwise
few
seconds
to

purge
air
inside

charg

ing
hose
See

Fig
AC
14

Counterclockwise

j

3

@

I

Can
tap
handle

2

ChlcginS
hose

3
Needle

4

Refrigerant
can

AC246

Fig
AC
13
Can

Top

Purging
air

R

12

To

L9w
pressure

service
valve
AC247

Fig
AC
14

Purging
Air

Ta

High
pressure

service
valve

f

r

AC181A

Fig
AC
15

Discharging
System

AC
ll
DISCHARGING
SYSTEM

The

pressurized
refrigerant

gas
in

side

system
must
be

discharged
to
a

pressure
approaching
atmospheric

pressure
prior
to

evacuating
refrigerant

inside

system
This

operation
should

be
also
made
to

pennit
safe
removal

when

replacing

system
components

A
Close

high
and
low

pressure

valves

of
manifold

gauge
fully

2

Connect
two

charging
hoses
of

manifold

gauge
to

their

respective

service
valves

WARNING

Securely
connect

high
pressure
dis

charge
service
valve
to
that
of

manifold

gauge
with
a
hose
also

connect
low

pressure
suction
serv

ice
valve
to
that
of
manifold

gauge

For

locations
of

high
and
low

pres

sure

discharge
and
suction
service

valves
see

Fig
AC
29

3

Open
both
manifold

gauge
valves

slightly
and

slowly
discharge
refriger

ant
from

system
See

Fig
AC
15

WARNING

Protect

fingers
with
cloth

against

frostbite

by
refrigerant
when
con

necting
the

charging
hose

to
the

service

valve
or

disconnecting
it

therefrom

Nole
Do

not
allow

refrigerant
to
rush

out
Otherwise

compressor
oil
will

be

discharged
along
with

refriger

ant

EVACUATING

SYSTEM

I

Connect

high
and
low

pressure

charging
hoses
of
manifold

gauge
to

their

respective
service
valves

of

sys

tem
and

discharge
refrigerant
from

system
Refer
to

Discharging
System

WARNING

Securely
connect

high
pressure
dis

charge
service
valve
to
that
of

manifold

gauge
with
a
hose
also

connect
low

pressure
suction

servo

ice

valve
to
that
of
manifold

gauge

For

locations
of

high
and

low

pres

sure

discharge
and
wction
service

valves

see

Fig
AC
29

WARNING

Securely
connect

high
pressure
dis

charge
service
valve
to
that
of

manifold

gauge
with
a
hose
also

connect
low

pressure
suction
serv

ice
valve
to
that
of
manifold

gauge

For
locations
of

high
and
low

pres

sure

discharge
and
suction
service

valves

see

Fig
AC
29

CAUTION

a
Be
sure
to

purge
air
from
the

high

and
low

pressure
charging
hoses

b
If
air
is
mixed
with

refrigerant
gas

in

system
evacuation
of

system

should
be

performed
Refer
to

Evacuating
System

2
Attach

center

charging
hose

of

manifold

gauge
to

refrigerant
can

through
can

tap
Break
seal
of

refriger

ant
can
to

allow

refrigerant
to
enter

manifold

gauge
Loo

en

charging
hose

at
the
center

fitting
of
manifold

gauge

and

purge
air
from
inside

charging

hose
Refer
to

Handling
Can

Tap

3

Open
high
and
low

pressure

valves
of
manifold

gauge
and

charge

refrigerant
into

system
See

Fig

AC
17

Note
When

refrigerant
charging
speed

is

slow
immerse

refrigerant
can
in

water
heated

to
a

temperature
of

about
400C
1
040

F
for

a
short

time

See

Fig
AC
18

WARNING

a
Under

any
circumstances
the

re

frigerant
can
must
not
be
warm

ed
in

water
heated
to
a

temper

ature
of

over
520C
1260F

b

A
blow
toreh
or
stove
must

never
be
used

to
warm

up
the

can
Air

Conditioning

To
Low

pressure

service
valve

t

R
12
t

@
I
J
To

High
pressure

service
valve

t

t

AC183A

Fig
AC
17

Charging
Refrigerant

p
CAUTION

When

charging
liquefied
refrigerant

into
the

system
with
the
can
turned

upside
down
to
reduce

charging
time

charge
it

only
through
high
pressure

discharge
service
valve
but
not

through
low

pressure
suction
service

valve
See

Fig
AC
19
After

comple

tion
of

charging
the

compressor

should

always
be
turned
several
times

manually
lmmene
in
water

heated
to
about

400C
1040F

for
a

hort
time

AC184A

Fig
AC
18
Charging
Refrigerant

To
Low

pressure

service

valve
To

High
pressure

service
valve

t

r

J

AC
13
Low

t

AC185A

Fig
AC
19

Chorging
Liquefied
Refrigerant

Air

Conditioning

IDLER
PULLEY
AND

COMPRESSOR
DRIVE
BELT

ADJ
USTMENT
OF
BELT
TENSION

Idler

pulley

Alternator

Crankshaft

pulley

Unit

mm
in

Idler

pulley

Fig
AC
25

Belt
Tension

Specified
compressor
belt

tension
is

8

to
12
mm
0
31
to
0
47

in
when

thumb

pressure
of
10

kg
22

Ib
is

applied
midway
between
idler

pulley

and

compressor
pulley

1
Loosen

idler

pulley
lock

nut
and

then

adjust
pulley
by
turning
adjusting

bolt

2

After

adjustment
tighten
idler

pulley
lock
nut
bolt

3
Remove
idler

pulley

4
Install

pulley
in
the

reverse

order
of
removal

5

Adjust
compressor
belt
tension

REMOVAL
AND

INSTALLATION

1

Jack

up
front

of
car
and
remove

under
cover

2
Remove
idler

pulley
lock
nut

and
loosen
belt
tension

adjusting
Fig
AC26
AC382A

Idler

Pulley

TIghtening
torque

@
3
7
to

5
1

kg
m
27
to
37
ft

lb

AC383A

Fig
AC
27

Compressor
and
Bracket

AC
19
REMOVAL

I

Operate

compressor
if

possible

at

engine
idling
speed
with
air
condi

tioner

controls
set
for
maximum
cool

ing
and

high
blower

speed
for20
to

30

minutes
with
all

windows

open
to

return

oil
into

compressor

2
Disconnect

battery
ground
cables

and

compressor
lead
wire
at
con

nector

3

Discharge
refrigerant
from

cool

ing
system
Refer
to

Discharging
Sys

tem

4

Jack

up
front
of
car
and

remove

under
cover

5
Loosen
idler

pulley
lock
nut
and

loosen
tension

adjusting
bolt

fully

Remove

compressor
drive
belt

See

Fig
AC
26

6
Remove

high
and
low
flexible

hoses
from

compressor

WARNING

Gradually
loosen

discharge
side

hose

fitting
and
remove
it
after

remaining
pressure
has
been
re

leased

CAUTION

Be
sure
to

immediately
put
plug
in

flexible
hose
and

compressor
open

ings

7
Remove
bolts

securing
lower

part

of

compressor

8
Remove
bolts

securing
upper
part

of

compressor
Hold

compressor
with

one
hand
when

removing
bolts
and

then
remove

compressor

With

compressor
clutch

up
lift

compressor
out
with

both
hands

CAUTION

00
not

attempt
to
leave
the
com

pressor
on
its
side
or

upside
down

for
more
than
10
minutes
as
the

compressor
oil
will
enter
the
low

pressure
chambers
If
under
that

condition

compressor
should
be

oper

ated

suddenly
internal

damage
would

result
To

expel
oil
from
chambers

hand
crank

compressor
several
times

in
its
installed
condition