Toyota Supra 1987 Quick start guide

TOYOTA

ELECTRICAL WIRING DIAGRAM

FOREWORD

This

wiring

diagram

has

been prepared

to

provide

information

on

the

electrical system

of

the

1

987

TOYOTA

SUPRA.

Applicable models:

MA70

series

For

other

service specifications and repair procedures

of

the

1

987

TOYOTA

SUPRA than listed in

th

is manual, refer

to

the

following

repair manuals;

Manual Name Pub

No

.

1987

Toyota

Supra Repair Manual

RM043U

TCCS (7M-GE} Diagnosis Manual

DM008U

ECT

(A340E}

Diagnosis Manual

DM006U

All

information

in

the

manual

is

based on

the

latest

product

information

at

the

time

of

publ

ication

. However, specifications

and procedures are subject

to

change

without

notice

.

TOYOTA

MOTOR

CORPORATION

1987

TOYOTA

SUPRA

ELECTRICAL

WIRING

DIAGRAM

INTRODUCTION

.................

.

HOW

TO

USE THIS

MANUAL

....

...

.

TROUBLESHOOTING

....

.

......

. . .

GLOSSARY

OF

TERMS

AND

SYMBOLS

POWER SOURCE .

....

. .

....

...

..

. .

STARTING

AND

IGNITION

SYSTEM

..

EFI

SYSTEM

..

...........

...

..

...

.

CHARGING

SYSTEM

.....

....

. .

...

.

LIGHT

AUTO

TURN

OFF

SYSTEM . . . .

©

1986

TOYOTA

MOTOR

CORPORAT

I

ON

All

rights reserved.

This

book

may

not

be

re-

produced

or

copied,

in

whole

or

in

part,

without

the

written

per

mission

of

Toyota

Motor

Corpora

-

tion.

..

-

..

TURN

SIGNAL

AND

HAZARD

WARNING

LIGHTS

-

HEADLIGHTS

.

..

.

..

. .

.....

.

..........

.

..

.

FOG

LIGHTS

....

.

..

...

....

.

......

.

.....

..

. .

--

-

INTERIOR

LIGHTS

...

.

..

...

..

.

....

...

. .

..

. . -

BACK

-UP

LIGHTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . MC.8

STOP

LIGHTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MIM

TAILLIGHTS

AND

ILLUMINATION

. . . . . . . . . . . . •

••

REMOTE

CONTROL

MIRRORS

.

....

..

.........

MN

REAR

WINDOWDEFOGGER

AND

MIRROR

HEATER

MIM

FRONT

WIPER

AND

WASHER

.........

..

.

DOOR LOCKS .

................

. .

......

.

..

. .

REAR WIPER

AND

WASHER

..

.

.....

.

...

.

..

. . .

POWER WINDOWS

..

.............

..

...

..

.

..

.

POWER

SEAT

. .

..................

........

. .

CRUISE

CONTROL

. . . .

..

. .

...

.

.......

.

....

. .

ECT SYSTEM .

....

. .

.......

..

.....

.

.....

.

..

.

A.

B.

S. .

..

. .

..

..........

.....

.

......

. . .

..

.

HEADLIGHT

CLEANER

.......

...

..

.

.......

.

CIGARETTE

LIGHTER

AND

CLOCK

......

.

...

.

TEMS

...

....

..

. . .

....

· · · · · · · · · · · · · · · · · · · · ·

UNLOCK

AND

SEATBELT

WARNING

...

. .

....

.

SUPER

MONITOR

...

.

....

...

. .

..

.

........

. . .

HORNS . . .

.....

. . . .

.....

..

. . . . . .

~~

::

. . .

..

.

THEFT

DETERRENT

SYSTEM

.......

.

.......

.

AUTO

ANTENNA

......

....

.............

...

.

RADIO

AND

TAPE

PLAYER

.........

.

...

....

.

COMBINATION

METER

.................

...

. .

AUTOMATIC

AIR

CONDITIONER

........

....

.

GROUND

POINTS

...................

...

. .

..

.

RELAY

LOCATIONS

..

...............

..

. .

..

.

ELECTRICAL

WIRING

ROUTING

. .

......

...

..

.

OVER

ALL

ELECTRICAL

WIRING

DIAGRAM

...

.

.,.

ME:M

•wl

•.aM

.

.,.

•1•

••

•1•

•4•

••

....

•1:•

••

•••

••

•t•

..

••

-

A. INTRODUCTION

This manual

is

composed

of

the

following

5 elements.

Power Source System

Circuit

Ground Points Relay Location

& Wiring

Routing

Over all Wiring

Diagram

Circuit

from

battery

to

each

fuse

Each

circuit

classified

by

system

Relation between

ground points

of

each

component

Relay & Connector

location Shows relation

between

each

system

System

No

. System

Title

8

~

HEADLIGHTS

:l

!tjlf·

··-

~...

.

.,...

U}·. m

...

rn

·+

..

l.

•

"'

"

"'

;@

T • '

C>

·

HEADLIGHT

·--

·

•

4

~

:

'-'-

..

_LH_

--"-"---'

. .

·t_ ·.

,@

·~

i

£

:i :

:I

.."

•f

·~

.

~

.

$

11

1:1.,

1

Components

@11.

o.<

1

rraQm

®

-®

1

1tliJ

0

11

1

1'

1

@]

,-----,

e

tm

Circuit

4

2C

~

I

IC

G>

©

~

® ®

u i

®

Connector

Illustration

Jb

®•

~•C

'

a

~

I

Connector

@

(Wire Harness Side)

®

Junction

Block

No

. 2 I I (Wire Harness Side)

Note:

The number indicates the number

of

the

junction

block.

Male 1Male

Wire

to

Wire Connector '

jl

Female

Female Male

ELECTRI

CAL

WIRING

ROUTING

.··-·-- ·-

··

.··

-·-·

-

·-

a-

"'·

-

·-'-

·-

,,

·

---

-

,.

......

.

--

..

.._

_

c.--

_

:

.._

__

'-

_

®=:

::

._

:_

,.

--

~·

·

~

..

_.

_.,.

....

_,

..

-

~

IOI

HU.]

Location

' •<

•-

·•

...

•

0--.

•

1

0.

-C:

-

d••-

.

•<·

--··-··

..

.,

,

• •

<c

...

..

- - •

-•

.

--

·-

..

."

-··

·-··

ff

:.-;~

,_ ,_

..

...

,.

_.

,_

...

~

....

...

(@

Headlight

LH

(

Wiring

routing

com·)

ponents listed in

alphabetical order

@ Engine

Room

Main

Wire &

Junction

Block

No

. 2

I

E1

IEngine

Room

Main

Wire &

Cowl

Wire

14

~

REAR

WIND~W

DEF~GGER

7 .

SA

GAUGE

®-

-

-~

@

-

~

®-

-

....

!

®Pin

Number

Numbered

in

order

from

upper

left

to

lower

rig

ht

Female

30A

DEFOG

CB

Numbered

in

oder

from

u

pper

right

to

lo

wer

left

Male

@Male

& female connectors distinguished

by

shape

of

their

in

ternal pins.

•

Al

l

connectors

are shown

from

the

open

end, and

the

loc

k is

on

top.

Female

©Connector

Color

Connectors

not

indicated

are

milky

white

in

color.

ABBREVIATIONS

The

follow

ing abbreviations are used

in

this

manual.

I

A/C

Air

Co

nd

itioner

FL

A/T

Automat

ic Transmission J/B

CB

Circuit

Breaker LH

ECT

:;;::

Electronic

Controlled

Tra

nsmission

MIT

EFI

Elec

tron

ic Fuel

Inject

io

n

O/D

=

DEFOGGER

RELAY

CL

OSED

MITH

IGNITIONS/MAT

IG POSI T

ION

-----®

!ND

DEFOGGER

SIM

ON

@@BLACK

------

---

-©

@Indi

cates

circuit

in

Junction

Bl

ock

No.

3.

Example:

1C indicates

that

it

is

inside

Junction

Block

No

. 1.

®Troubleshooting

Hints

&

Components

Operation

®W

ire

Color

Wire colors are

indicated

by

an alphabetical code.

B Black L

Light

Blue

R Red

BR =

Brown

LG

=

Light

Green V =

Violet

G = Green O Orange W

White

GR

=

Gray

P

Pink

Y =

Yellow

The

firs

t le

tter

indi

cates

the

basic

wire

color

and

the

second

letter

indicates

the

color

of

the

stripe.

Exampl

e:

R-G

~\

?====r

I(

Red

Green

Fusible

Li

nk RH

Right

-hand

Junction

Block

S/W

Switch

Le

ft-ha

nd

vsv

Vacuum

Switching

Valve

Manual Transmission

W/

=

With

Overdrive

W/O

Without

B

HOW

TO

USE

THIS

MANUAL

To

better

understand

how

to

use

this

manual, let's assume

that

the

headlights w

ill

not

light,

and go

through

an actual

troubleshooting

procedure.

CONFIRMATION

OF

TROUBLE

Turn

on

the

headlight switch and check

for

yourself

that

the

hr

jlights

do

not

come

on.

READ

THE

CIRCUIT

DIAGRAM

1. Locate

the

headlight system number

in

the

index and open

the

manual

to

the

page indicated.

(The system number

is

written

in

bold

at

the

top

corner

of

each page).

2. Read

the

circuit

dia!'.lram

to

learn

how

it

works.

3.

Unfold

the

ELECTR

ICA

L

WIRING

ROUTING

page

at

the back

of

the manual.

::ill'"'

l •

Cln•,.;

.' '

H

•M•

~

..

,,,

J/B

No

.

21

Inside

RELAY

LOCATIONS

s 20

®-tLt.r

"Ef

l •

•(

~

..

_

!SA

HEAD

LH

PINPOINT

THE

TROUBLE

If

the

circui

t

is

in

common

w

ith

others

(power

circuit

or

ground

point),

problems

will

occur in some

of

the

others also.

Please

refer

to

POWER SOURCE (System No, 1-2). Since the

headlights are related

to

the

HAZ-HORN,

check

this

circuit.

Okay

......

Trouble

lies

within

the

headlight

circuit.

Bad

....

...

. Check circuits in

common.

1. Inspection

of

Headlight

Circuit

(Returnto

HEADLIGHT

page.)

(a)

Check Headlight Fuse

CD

Accoriding

to

®

of

the

circuit,

the headlight fuse

is

in

J/B

No.

2.

®The

location

of

J/B

No

. 2 can

be

found

by

referring

to

the

RELAY

LOCATIONS

page

just

before

the

ELECTRICAL

WI

RING

ROUTING

page.

®Check

if

either

fuse

is

blown.

(b) Check

if

there is

power

to

No

. 5

of

® .

CD

Turn

the

light

control

switch

to

HEAD

.

® Using a voltmeter, check

for

voltage

as

shown

below.

1

Negative(-)

Probe

.....

Good ground

point

or

negative

battery

terminal.

Positive(

+) Probe .

.....

No.

5

of

® .

M

~"''~:~~

~

......

j

RELAY

t-

gt

It

5 2D

" R

<C

....

3

0

..

LH

oc

N

;;'

2'!

!~

~

,__

5~

-~

....

'

_l

<C

BATTERY

5

IB

Lf-

II

A- L

_!.

..!!!.

" "

"'

....

> > '

"'

II

<C

ccnr16.

s1w1

14(D)

13(

a)l2(

o)

3 D

lB

lG

" OFF

....

'

<C

"'

0

....

" 3 E2

~"'

TAIL

r~

~B

....

HE

AD

0-

I-<>-

---0

'

"'

r

FLASH

"'

<C

~Ii:

4 FJ

~~

LOH

"'"'!"

.,~

<CllaJ

c

~~~

J

HIGH

~~~6

G)

9~1lJ

i1w

201

....

-

~

"' "' G-A

:z

' '

" "

M-B

6

3B

II

J/B

[]

"' "'

"''~~

" '

"

7,

9<f

3

IF

t

J/

B

NO

.I

SET

BOLT

@BROWN

D

..

~

2

i

:::

::_

__

,,

,.

..

I

1-

---

..

-

j

;;;,~;;;

:

...

.•

'

l~

·

-

k~~~:

·

"

:= .

;;.:.

:

::<:

~

1

~:o:;~~.:;-~,.

...

,.,..

~

..

!

,

;;~:=;::.

.

::

·

..

~.

ISA

HEAD

LH

®

HEADLIGHTS

©

V-M

I<

l1

f

~

z

"'

<C

"'

~

"'

"

B

Battery

Voltage

.... ..

Troub

le is past

No

. 5

of

®·

No

Battery

Voltage

...

Troub

le is

before

No

. 5

of®.

CAUTION

:

Insert

the

tester probes

from

the

wire

harness side

of

the

connector.

Consequentl

y,

note

that

the

numbers

wi

ll

be

in

reverse

order

of

that

shown

in

the

illustrat

i

on.

(c) Check

if

there

is

power

to

the

headlights.

CD

From

the

ci

rcuit

we

can

see

that®

is

the

head

li

ght

connector

and

that

there

is

power

from

No.

3

to

2

when

the

headlights are

at

high

beam.

®

Turn

the

light

contro

l

switch

to

HEAD.

@ Place

the

dimmer

swi

tch

at

HI.

vo

l

tmeter,

check

for

voltage

as

shown

below.

{ Negative (- )

probe

. . .

Pos

i

tive(+)

probe

.

..

. Pin

No.

2

of

connect

or

@

No.

3

of

connector@

~e

. . . . .

..

1

.

-~

. oltage

...

.

Trouble

is

in

the

headlight.

Probable defec

ti

ve

ground

past

No

.2

so

make

contact

with

negative lead

to

a

good

ground

point

or

battery

negative

term

inal and

check

for

voltage.

I

Voltage

..

.....

Trouble

is

past

No.

2

of@

.

No

Voltage

.

..

.

Trouble

is

before

No

. 3

of@

CAUTION:

Do

not

check

for

continuity

wh

ile voltage is

applied

or

it

may

result

in

damage

to

the

tester

.

(d)

To

check

the

low

beam, place

the

dimmer

switch

at

LOW

and

perform

the

check

in

the

same sequence.

(e} Check

ground

point

1

The

ground

po

i

nt

is

indicated

by

the

"\/fl

J/B

No.

1

SET

BO

LT

in

the

circu

i

t.

2

The

location

of

the

ground

point

on

the

vehicle can

be

found

by

referring

to

the

same

symbol

"\/fl

in

ELECTRICAL

WIRING

ROUTING.

B HOW

TO

USE

THIS

MANUAL

..

1- 1

~

POWER

SOURCE

(Power

-

Load

Reference)

J/ B

No.2

(Engine

Comp

a

rtmentl

JOA.

RTR R

enact

Con

tr

ol

R~av_Jln

t

~

•

.a

t

•on

Relay No 21

7 SA • CHARGE All

KN

:o

r

• 15A_ H

EA

D

LH

- .

Hod

ll!Jht

ILH)

1

5A

HE

AD

RH

Hodhghr

fRH)

' -

-Tu

r

nS..gn.alFI~

~

+

·

HA

Z HORN Hc;rn,,

Ho

rn

Relay

.- -

Thtt1

O• :

tr

rvrit

Ho

rr1

<.;

ucu

•t

(J

p

en

ing

He

l

ay,

TcCs

~

CU

,

c n

e<:

k

c;;

on

ne

c:u>1

, ISC

Va

lve,

HIA

EF

I VSV (E

GA

, Fuel

P

1

e

~su

r

e

up

and lntokt Air Co

nt

r

ol

I, OX

S

en~or

~cu--

--

-

Clock

ISA

RAO

Q

·N

Q 1

~

M

o

n.tor

Co~

Theh

Dr

1ernent

Coms:iu.!_!

r

__

Au10Ante

nroa

>--

--

Q...t

.....

MT

....... Pi:.

.........

..

1

-2

~

PCJHER

SOURCE

@"""

''

·'"

·B

'-

··-

............

~-

-~

~

~~



. ' .

~IC

•

~

IOf!"

C

•

~~

®

"'

- "

'

""'"

'.· :. : .

·

~

~.

~

::m:

i;.o•

I

' :I•

..

~1

.

"

-

'

~

,.

,

RELAY

LOCATIONS

J/B

No.

2

2. Inspection

of

Common Circu

it

s

(a)

Check

battery

and fusible

link

(b) Check related systems

Check

how

the

HEAD

FUSE

is

the

system.

In system No.

1-1

(POWER SOURCE),

you

will

find

a chart listing the relationship between the fuses and

components. Here we can

see

that

the

HEAD

fuses are

to

their

respective headlights.

(c) Check

the

ci

rcuit

fro

m

the

battery

to

the

HEAD

FUSE.

Q)

In

system No. J-2 (POWER SOURCE), tha

power

circuits

for

all fuses are listed.

The

circuit

between

the

battery

and

HEAD

fuse branches

off

with

fuses

HAZ

-HORN

15A

etc.

®

Turn

on

the

HAZARD

switch

Okay

....

No

troub

le

in

c

ir

cuit

up

to

HAZ

-

HORN

junction.

Bad

..

.

...

Trouble

lies between fusible l

ink

and

J/B

No. 2.

(d)

Check

the

HEADLIGHT

RELAY

(Return

to

HEADLIGHT

page)

1 The

circuit

shows

th

at

the

HEADLIGHT

RELAY

is

in

J/B

No

.

2.

2 Installation

of

the

relay can

be

found

by

referring

to

the

RELAY

LOCATIONS

.

The

HEADLIGHT

RE

LAY

is

located in J/ B

No

. 2 in

the

engine

com

-

partment

as

shown.

3 Check

for

power

to

the headli

ght

relay coil.

Cf

Turn

the headlight switch

to

HEAD.

® Using a voltmeter, check

for

voltage

as

shown

below.

{Negative(- ) Probe

....

No.

6

of@

Positive(+) Probe

.....

No.

2

of

®

Confirm

th

at there

is

voltage

~·:::~·"

·

-

~

·~

-t-

-®.-

rt

~~·

~

SYSTEM I

ND

EX

'"

H

!AD

,.

®

HE

A

Dt.

IGHTS

TOYOTA

SUPRA

r

SY

STEMS

1987

Mode4

(Pa9f

1 to Page81

f-

--

LOCATION SYS':'

IE

MS

L

O

CATIO~

~

1.1

. a.J

~

...

--

B

4 Next, check

if

the headlight relay points are closed

and there is power

to

the

No

. 5

of

® .

See

step 1-(b)

If

no voltage, trouble lies

in

the headlight relay.

(e)

Check which systern-s (components)

have

the

same

ground

point.

The

ground points are listed

in

system

No

.

34

(GROUND POINTS). As shown,

GROUND

PO

I

NT

'o/

is

used

for

other components besides the

HEAD

-

LIGHT

SYSTEM, and

it

also connected

to

GROUND

POINT W .

(f)

Check

how

the HEADl,,.IGHT SYSTEM

is

connected

to

the other systems.

1 From the

EWD

SYSTEM

INDEX

(facing the first

EWD), we

can

find

the location

of

the headlight

sy

st

em

within

the

ELECTRICAL

-

WIRING

DIAGRAM

at

the back

of

the

book

(Page

5

of

8,

grid 7).

2 By referring

to

the

ELECTRICAL

WIRING

DIAGRAM,

we can

see

that the

HEADLIGHT

SYSTEM

is

the

TAIL

and

ILLUMINA-

TION SYSTEM.

NOTE:

The relationship between system circuits

1s

n

ot

shown

so

always

confirm

wi

th

the overall w

irin

g

diagram.

(g)

Re-check

After

repair, check

that

the

circuit

functions normal

ly.

Always

follow

the steps described above

to

narrow

do

wn the possible range

of

the trouble.

C TROUBLESHOOTING

S/W2

Ohmmeter

Digital

Type

TOYOTA

hf

<ll'lll(

""

'1$11,.

L O

·]

DC

To

Ignition

S/W

IG

Terminal

Voltmeter

1

Analog

Ty

pe

r",

/

-

v "

o{~

+@

~

10

-@

VOLTAGE CHECK

(a)

Establish

condi

tions

in

which

voltage

is

present

at

the

check point.

Example:

@-

Ignit

ion S/W

on

@-

Ig

nit

i

on

SNV

and S

NV

1

on

©-

Ig

nition

S/W, S/W 1 and Relay

on

(S/W 2

off)

(b) Using a vol

tme

ter, connect the

nega

tive lead

to

a

good ground

point

or

negative

battery

terminal,

and the positive lead

to

the

con

n

ector

or

com-

ponent terminal.

This

check can

be

do

ne

wi

th a

test

light

instead

of

a voltmeter.

CONTINUITY

AND

RESISTANCE CHECK

(a) Disconnect the

battery

termina

l

or

wire

so

there

1s

no

voltage between

the

check

points

.

(b) Contact

the

two

leads

of

an

ohmm

eter to

eac

h

of

the

check points.

If

the

circuit

has

diodes, reverse

the

two

leads and check

again.

When contacting

the

negative lead

to

the

diode

positive

side and

the

positive lead

to

the negative side, there should

be

continu

i

ty.

When contacting the

two

leads in reverse, there should be

no

cont

i

nuity.

(c)

Use

a

volt/ohmm

eter

with

hi!1h

impedan

ce

(10

kn

/

V

minimum)

for

troubleshooting

of

the electrical

circu

it.

Test

Light

Disconnect

\

Li

ght

S/W 2

To

I

gnition

S!W

IG Terminal

Fuse

Case

Short@

°j

S

/W

1

Short@

Relay

Short©

/Disconnect

Solenoid

=

c

FINDING

A

SHORT

CIRCUIT

(a)

Re

move the

blown

fuse and disconnect all loads of

t

he

fuse.

(b) Connect a test li

ght

in place

of

the fuse.

(c) Establi

sh

condit

ions in which the test li

ght

comes on.

Example:

@- Ignition

S/VV

on

@-

Ig

ni

tion

S/W

an

d S/W 1 on

©-Ignition

S/VV,

S/VV

1 and Relay on (Connect

the

Re

lay) and

S/VV

2

off

(or Disconnect

S/VV

2)

(d) Disconnect and reconnect

the

connectors w

hil

e

watching the test light.

Th

e short li

es

between the connector where the

tes

t

light stays

lit

and

the

connector where the l

ight

goes

out.

(e)

Find the exact location

of

the short

by

lightly

shak-

ing

the

pro

blem

wire

along

the

body.

D GLOSSARY OF

TERMS

AND

SYMBOLS

-B

-i~

~

DIODE.

ZENER

...L

BATTERY

Stores chemical energy

and

convertsit

into

electrical energy.

Provides

DC

current

for

the

auto's

various

electrical

circuits.

CAPACITOR (Condenser)

A small

holding

unit

for

temporary

storage

of

electrical

voltage

Capacitors

with

a

ground

connec-

tion

are

frequently

called Conden-

sers.

CIGARETTE

LIGHTER

An

electric

resistance heating

element.

CIRCUIT

BREAKER

Basically a reusable fuse, a

circuit

breaker w

ill

heat and open

if

too

much

current

flows

through

it.

Some

units

automatica

l

ly

reset

when

cool,

others

must

be

manu-

ally

reset.

DIODE

A

semiconductor

which

al

lows

current

flow

in

only

one

direction.

A

diode

which

allows

current

flow

in

one

direction

but

blocks

reverse

flow

only

up

to

a specific voltage.

Above

that

potential,

it

passes

the

excess voltage.

This

acts

as

a simple

vo

ltage regulator.

D

ISTRIBUTOR

.

llA

Channels high-voltage

current

from

the

ignition

coil

to

the

individual

spark plugs.

FUSE

A

thin

metal

strip

which

burns

through

when

too

much

current

flows

through

it,

thereby

stopping

current

flow

and

protect

ing a

circuit

from

damage.

FUSIBLE

LINK

A heavy-gauge

wire

placed

in

hig

h

amperage

circuits

which

burns

through

en

overloads,

thereby

protecting

the

circuit

.

GROUND

The

point

at

which

wiring

attaches

to

the

chassis,

thereby

providing

a

return

path

for

an

electrical

circu

i

t;

without

a

ground,

current

cannot

flow.

Current

flow

causes a headli

ght

1. SINGLE

filament

to

heat

up

and

emit

light.

$ HEADLIGHTS

FILAMENT

A headl

ight

may

have

either

a

2. DOUBLE

cp

FILAMENT

~

0

g

+

LJ

I FUEL I

single (1)

fi

lament

or

a

double

(2)

filament.

HORN

An

electric

device

wh

ic

h sounds a

lo

ud audible signal.

IGNITION

COIL

Converts low-voltage DC

current

in

to

high-voltage

ignition

current

for

firing

the spark plugs.

LIGHT

Current

flow

through

a fi

lam

ent

causes

the

filament

to

heat

up

and

emit

light.

LED

(LIGHT

EM

ITTING

D

IOD

E)

Upon

current

flow,

these d

io

des

emit

light

without

producing

the

heat

of

a comparable

light.

Used

in

.

instrument

displays.

METER,

ANALOG

Current

flow

activates a magnetic

co

il which

ca

uses a needle

to

move,

thereby

providing

a relative display

against a

background

calibration

.

METER,

DIGITAL

Cur

rent

flow

ac

ti

vates one

or

many

LED's,

LCD's,

or

flourescent

dis·

plays,

which

provide

a relative

or

digital display.

MOTOR

A

power

un

it

which

converts

electrical energy i

nto

mechanical

energy, especially

rotary

motion

.

RELAY

Basically, an

electrica

l

ly

operated

1.

NORMALLY

switch

which

may

be

normally

CLOSED

closed (1)

or

open

(2).

Cur

rent

flow

through

a small

co

il

creates a

magnet

ic

field

which

D

SPEAKER

An

electromechanical

dev

i

ce

which

creates

sound

waves

from

current

flow

.

~

2.NORMALL

Y

~OPEN

either

opens

or

closes an

attached

f---

- - -

--------

--

------------;

I I

~\

(=>

~

9

l----+----

1 I

switch.

RELAY,

DOUBLE

THROW

A

relay

which

passes

current

th

rough

one set

of

contacts

or

the

other.

RESISTOR

An

electrical

componen

t

with

a

fixed

res

istance, placed

in

a

circuit

to

reduce

voltage

to

a

specific

va

lue.

RESI

STOR,

TAPPED

A resistor

which

supplies

two

or

more

different

non

-ad

justable

resistance

va

lues.

RESI

STOR,

VARIABLE

or

RHEOSTAT

A

controllab

le resistor

with

a

variable

rate

of

resistance.

Also

called a

potentiometer

or

rheostat

.

SENSOR (Thermistor)

A resistor

which

varies its

resistance wi

th

temperature.

SENSOR,

ANALOG

SPEED

Uses

magnetic

impulses

to

open

and close a

switch

to

create a signal

for

activation

of

other

components.

SHORT

Used

to

prov

ide an u

nbroken

connection

within

a

junction

block.

SOLENOID

An

electromagnetic

coil

which

crestes a

magnetic

field

upon

current

flow,

to

move

a

plunger,

etc

.

-

~-

+

SWITCH,

MANUAL

Opens

and

cl

ose

s

ci

rcuits,

thereby

stopping

(1)

or

allow

ing (2)

current

flow.

1.

NORMALLY

OPEN

2.

NORMALLY

CLOSED

SWITCH,

DOUBLE

THROW

A switch

which

continuous

ly

passes

c

urrent

through

one

set

of

contacts

or

the

other.

SW

I

TCH,

IGNITIO

N

A

key

operated

switch

wi

th

several

posit

ions

which

allow

various

circuits,

Particu

l

arly

the

primary

ignition

circu

i

t,

to

become

operational.

SWITCH,

WIPER

PARK

Automatical

ly

returns

wipers

to

the

stop

posi

tion

when

the

wiper

switch

is

turned

off

.

TRANSISTOR

A sol

idstate

device

typ

i

cally

u

sed

as

an

electronic

relay;

stops

or

passes

current

depending

on

the

applied

voltage

at

"base"

WIRES

1.

NOT

CONN~CTED

2.

SPLICED

Wires are

always

drawn

as

strai

ght

lines

on

w i

ring

diagrams. Crossed

wires

(1)

without

a

black

do

t

at

the

junction

are

not

joined;

crossed

wires

(2)

with

a

black

dot

at

the

junction

are

spliced

(joi

n-

ed)

connections.

1-1

POWER

SOURCE

(Power-Load

Reference)

J

/B

No.1 (Left Kick Panel)

Po

wer Load System

No.

TCCS ECU 3

7.5A

IGN Charge Warning Lig

ht

4

Super Moni

tor

Computer 27

Washer

Motor,

Wiper

Moto

r, Wiper Relay 15

20A

WIPER Rear Washer

Motor

, Rear Wiper

Re

lay, Rear Wiper

Motor

17

Headlight Cleaner Relay

23

Stop

Lights, Hi Mount

Stop

Light,

Light

Failure Sensor

11

Cruise

Contro

l Computer

20

20A

STOP ECT ECU

21

A.B.S. Computer

22

7.5A

TURN

Turn

Signal Flasher 6

Check Engine Warning

Light

3

Light

Retainer Relay (

Int

egration Relay No. 2) 5

Back-up Lights

10

Lig

ht

Fa

il

ure

Sen

so

r,

Rea

r Lights Warning 11, 12

Defogger S/W, Defogger Relay 14

Power

Window

Main Relay 18

7.

5A

GAUGE

A/T

Indicator

S/W, Pattern Select S/W

21

A.B.S. Warning Light,

A.B

.S. Computer

22

Seat

Belt

Warni

ng

Light, Integration Relay No. 1

26

Super Moni

tor

Computer

27

Comb

ination Meter

32

.Heater

Re

lay, Water Valve VSV, Heater

Control

Assembly, A/C Relay Box

33

Glove Box Light, Combination Meter Light, Radio,

A/T

Indicator

Pattern Select S/W, Cruise Control Main S/W,

Hazard S/W, 0 /D Main S/W, Defogger S/W

Cigarette

Light

er, H

ea

ter

Control

A

ssem

bly

, Fog

Light

S

f../11

12

15A

TAIL

Clearance Lights, Fro

nt

Side Marker

Light

s,

Licence Plate Lights, Rear Side Marker Lig

ht

s

Light

Failu

re

Sensor, Tai

llight

C

lo

ck

24

Super

Monitor

Computer

27

Light

Retainer

Re

lay

(Int

egration Relay No. 2) 5

Cru

is

e

Contro

l Main S/W

20

ECT ECU

21

15A

ECU-IG A.B.S. Computer

22

TEMS

Compu

tor,

TEMS S/W 25

Auto

Antenna

30

7.

5A

Remote

Control

Mirro

r S/W,

Mirror

Motor

13

RADIO

N0

.2 Radio and Tape Player

31

Vanity

M

irro

r Light, Ign

it

ion Key

Cylinder

Ligh

t,

Interior

L

ight

,

Door

Key

Cylinder Light,

Door

Warning Light, Luggage Compartment Light, Integr

ation

9

7.5A

DOME Relay No. 1,

Door

Courtesy Light

Int

egra

tion

Relay No.1

26

10A

MIR.

HTR

Mirror

Heater 14

1

~

i

J/ B No.1

(Left

Kick Panel)

Power Load System

No

.

1

5A

ENGINE

Alternator

4

Cigarette Lighter, Clock

24

Super

Monitor

Computer 27

15A

CIG

Theft

Deterrent Computer

29

Auto

Antenna

30

Magnet Clutch

Re

lay

33

30A

DEFOG

CB

Rear

Window

Defogger 14

J/ B

No.2

(Engine

Compartment)

30A

RTR Retract

Control

Relay (Integration Relay No. 2) 7

7.5A

CHARGE

Alternator

4

15A

HEAD

LH

Head

li

ght

(

LH)

7

15A

HEAD

RH Headlight

(RH)

7

Turn

Signal Flasher 16

15A

HAZ-HORN

Horns,

Horn

Relay

28

Theft

Deterrent Horn

29

15A

EFI

Circuit

Opening Relay, TCCS ECU, Check Connector, ISC Valve, 3

VSV

(EGA, Fuel

Pressure

up

and Intake

Air

Contro

l).

OX

Sensor

ECT ECU

21

Clock

24

Super

Monitor

Computer

27

15A

RADIO

NO. 1

Theft

Deterrent Computer

29

Auto

Antenna

30

Radio and Tape Player

31

30A

FLAM

2

Ignition

S/W

(AM

2) 1

30A

FL

CDS

FAN

Condenser Fan

Motor

33

Igni

tion

S/W

(AM

1.) 1

40A

FLAM

1

Alternator

4

Headl

ight

Cleaner

Motor

23

1.25B

FLALT

Alternator

4

60A

FL

ESC

A.B.S.

Actuator,

A.B.S. Computer 22

J/ B

No.4

(Right Kick Panel)

10A

A/C

Ampl

i

fier

Du

al

Pressure S/W, Condenser Fan

Re

lay, Magnet Cl

utch

33

30A

HEATER

CB

Blower

Motor

33

Fusible Links

(Near

the

Battery)

~I

_F_

L_2_.0_L

~l

~~~

~

~~~l~H_ea_d_l

i

g_h_t_R_el_ay~~

~~~~~~~~~~~~~~~~---'~~

1.

_

7

~--'

r

J/ B

No.5

(Near

the

J/ B

No.1}

Door

Lock

Control Relay 16

30A

PWR

CB

Po

werWin

dow

Master S/W 18

Power Seat S/W,

Support

Motor

19

Fuse

(Near

the

J/ B

No.1)

I 15A j

FRONT

FOG I

Front

Fog

Light,

Fog

Light

Re

lay 8

1-2

2

2A

~

PCJWER

Sl'JURCE

~

BATTERY

-=-

@30A

RTR

B

@FL

ALT

1.2SB

H 2 B B B

7.SA

DOME

20A

srnP

40A

FL

AMl

30A

FL

AM2

lSA

EFI

TAILLIGHT

RELAY

lSA

TAIL

~

30A

DEFOG

CB

@!SA

FOG

B 2

!SA

HAZ

-

HCIRN

lSA

RADICI

NO

. 1

HEADLIGHT

RELAY

!SA

HEAD

LH

ISA

HEA

D

RH

2E

@

60A

FL

ESC

B 3 s

©30A

FL

CDS

FAN

B 4 6

®30A

HEATER

CB

H

©30A

PHR

CB

H 2

a:

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2

lJ

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m

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lJ

6

lJ

20A

HIPER

7.

SA

GAUGE

7.

SA

TURN

!SA

ECU

IG

~~

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s

lJ

lSA

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l

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7.SA

RADIO

N0.2

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~~

~~~-~

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~

~~

~

7.SA

IGN

TAILLIGHT

RELAY

CLOSED

WITH

LIGHT

CONTROL

SIW

AT

TA

IL

CIR

HEAD

POSITION

HEADLIGHT

RELAY

CLOSED

WITH

LIGHT

CONTROL

SIW

AT

HEAD

POSITION

CIR

DIMMER

SIW

AT

FLASH

POSITION

@

IGNIT1"N

S/W

4-3

:

CLOSED

WITH

IGNITION

KEY

AT

ACC

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B-7,

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Toyota SUPRA 1987 Quick start guide

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