Toyota Corolla FR AE86L Series 1987 Quick start guide

FOREWORD
This wiring diagram has been prepared to provide information
on the electrical system of the 1987 TOYOTA COROLLA FR
AE86L series.
All information in the manual is based on the latest product
information at the time of publication. However, specifications
and procedures are subject
to change without notice.
TOYOTA MOTOR CORPORATION

1987 TOYOTA COROLLA FR
ELECTRICAL WIRING DIAGRAM
© 1.986 TOYOTA MOTOR CORPORATION
All rights reserved. This book may not be re-
produced or copied , in whole or in part, without
the written permission of Toyota Motor Corpora-
tion.
INTRODUCTION ...•......... • •........ .• ....•..
HOW TO USE THIS MANUAL ... ..... . ..•..•..•..•
TROUBLESHOOTING ..•........•. ; • .. ... ...• . ..
GLOSSARY OF TERMS AND SYMBOLS • .••• •• •..•••
POWER SOURCE .•..•.. . .. . ... • ..•. . ••. . .. • .•..
STARTING AND IGNITION SySTEM ..•..•.. •••...•
CHARGING SYSTEM ...•........ •..•..•..••...••
EFI SYSTEM ••••.. • ••..•••••...•..•.•...••.•.••
EMISSION CONTROL •... ... ...•••.. . ....• •• . ..• .
IDLE·UP
•.••.•.•.•...•..•....•••. .• ..•• • .•.••.
HEADLIGHTS . .... .. . ........ . .......... . ....•.
STOP LIGHTS ...•• . ...........•................
TAILLIGHTS AND ILLUMINATION ............... .
BACK·UP LIGHTS . ... . . . .. . .. . . ................ .
INTERIOR LIGHTS . . .. . .. . . ....• .. . .. ..... .. ....
TURN SIGNAL AND HAZARD WARNING LIGHTS ....
LIGHT AUTO TURN OFF SYSTEM . ...... ... • ......
FRONT WIPERS AND WASHER ....... ...... .•....
REAR WIPER AND WASHER ....•• . ...... .. • . ... •.
OVERDRIVE ... • .. . .. •...•. .. . . .... . . ... .. ... • .
SEAT
BELT WARNING ... . ; ... : .............•...
POWER WINDOW .... • ...•......•...............
REAR WINDOW DEFOGGER .... . ......•..........
REMOTE CONTROL MIRRORS ................... .
CRUISE CONTROL .. ..• . . • .............. • .......
CIGARETTE LIGHTER AND CLOCK ........ . .. . .. .
SUN ROOF .... . ......... ..... ....... .•........
..
..
..
..
-
=
..
..
-
-
..
-
..
..
-
..
..
..
..
..
..
..
-
..
RADIO AND HORN ............................. ..
COMBINATION METER. . . ... .. . . .. . . . .. . . . . . . .. . ..
AIR CONDITIONER. . . . . . . . . . . . . . . . . . . . . . . . . . . .. ..
GROUND POINTS .......................... . .. " ..
RELAY LOCATIONS. . . .. . . . . . . . .. . . .. . .. . . .. . .. _
ELECTRICAL WIRING ROUTING. . . . . • . . . . . . . . . . .. _
OVER ALL ELECTRICAL WIRING DIAGRAM. . . . . ... _
- 1-

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A INTRODUCTION
This manual is co~posed of the fo ll owing 5 elements .
-2-
Power Source
Circuit from
battery to
each fuse .
Components
System Circuit
Each cireu it
classified by
system
Ground Po i nts
Relation between
ground points of
each component
Relay Location
& Wiring Routing
Relay & Connector
location
Over all Wiring
Diagram
Shows relation
between each
system
System Circuit
Connector
Illustral:ion
0-
EE3QIm
®
~I
®
liILJ')illi1
lID
r---o
1m ®
Circuit
~
@
HEADLIGHT
lH
2 I
® ~
@-
~
~
d:b
® ® ®--
g i @
..
~
Connector
@
(Wire Harness Side)
®
"-' - - '''' '-
.- ,-_ ..... -
J;;:~- -
. - -- '---
Location
® Headlight LH
(
Wiring routing com- )
ponents listed in
alphabetical
order
~'~~~2 ~2C : .
2C
I
I
I
I
I
<m Engine Room Main
Wire &
Junction
Block No . 2
I
I
Junction Block. No.2 1
%
,
~
I (Wire Harness Side)
Note: The number indicates the number of the
junction block.
Male Male
• E Female
Wire to Wire Connector Female Male
II] Engine Room Main
Wire & Cowl Wire

A
14 ~ REAR HINDDH DEFDGGER
@- ------i>
@- --"""'"
®--
@PinNumber
Numbered in order
from upper left to
"lower right
~
~
Female
'"
DEfOG
CB
Numbered in oder
from upper right to
lower left
~
.D:E
Male
@Male & female connectors distinguished by
shape
of their internal pins.
• All connectors are shown from the open
end, and the lock is on top.
© Connector Color
Connectors not indicated are milky white
in color.
ABBREVIATIONS
The following abbreviations are used in this manual.
OEFDGGER RELAY
CLOSED NITH IGttITICIN SIll AT 1& POSITIClH ".- -- -@
AMO OEfOGGff'l SI lt ON
@@SLACK ""<~----- --©
@Indicates circuit in Junction Block No.3 .
Example:
)
1C indicates
that it is inside
Junction Block
No.1 .
@Troubleshooting Hints & Components Operation
®Wire 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 0 Orange W ; White
GR; Grey P ; Pink Y ; Yellow
The first letter indicates the basic wire color and
the second letter indicates the color of the stripe.
Example: R-G
I$) I
I{
I
Red Green
AIC ; Air Conditioner IIA ; Integrated Ignition Assembly
RH
; Right-hand
AfT ; Automatic Transmission JIB ;
Junction Block S/W ; Switch
CB
; Circuit Breaker
LH
; Left·hand VSV ; Vacuum Switching Valve
CMH
Cold Mixture Heater OlD
; Overdrive WI ; With
FL
Fusible Link OVCV ; Outer Vent Control Valve W
IO
; Without
-3 -

B HOW TO USE THIS MANUAL
To better understand how to use this manual, let's assume that the headlights will not light, and go through
an actual troubleshooting procedure.
-4 -
CONFIRMATION OF TROUBLE
Turn on the headlight switch and check for yourself that the headlights 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 diaQram to learn how it works.
3.
Unfold the ELECTRICAL WIRING ROUTING page at the back of the manual.
.. 1- ~ I"t1NEfI SOURCE
~ ,,, """S1
i~', .J .. :"" ~r9" "" "
•
,
")';"'~'"
'1b~!
'-::l:I , 1;<1.., - _
JIB No .2
In side
11:/0 ••
lOA
HE .... O lH
PINPOINT THE TROUBLE
If the circuit is in common with 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 ot' Headlight Circuit
(Return to HEADLIGHT page.)
(a) Check Headlight Fuse
<D Accoriding to @ of the circuit, the headlight fuse
is in JIB NO . 2.
® The location of JIB No_ 2 can be found by referring
to the RELAY LOCATIONS page just before the
ELECTRICAL WIRING ROUTING page_
® Check if either fuse is blown_
(b) Check if there is power to pin No .8 of @ .
<D Turn the light control switch to HEAD.
® Using a voltmeter, check for voltage as shown below.
{
Negative
(-) Probe ... . . Good ground point or negative
.
battery terminal.
Positive (+) Probe ... _. . Pin No.8 of @ .

I eATTOIT 10 II
+ .. ~
..
TAil 1 .... --
~ LOI<
~'"'~ "11;11
c;;;;~ FLASH
©@
rtl .. ,
L-tJNfAn lH
~.
• ~;, r--->-f--"'-''-------i
»'
12 l IU-CI
2 ~ I~._IZCJ
· ,-.
@ •
20~3~
IIUIlAU
CIIIHML
" "ElAT ,
9~P
~~
~
• -
,$:~~
~
, , .
• . • "
---
---
'"
'1'
"j
" ,"
. -,
Battery Voltage ... . .. Trouble is past pin NO.8 of
®.
No Battery Voltage ... Trouble is before pin No_ 8
of ®.
CAUTION:
B
Insert the tester probes from the · wi re harness side of the
connector. Consequently, note that the pin- numbers will
be in reverse order of that shown in the illustration .
(c) Check
if there is power to the headlights.
<D From the circuit we can see that © is the headlight
connector and that there is power from pin No.3 to
2 when the headlights are at high beam.
@ Turn the light control switch to HEAD.
® Place the dimmer switch at HI.
® Using a voltmeter, check for voltage as shown
below.
{Negative
(-) probe . . .
Positive (+) probe
... . Pin
No.2 of connector © .
Pin No.3 of connector © .
Voltage ....... Trouble is in the headlight.
No Voltage .. . . Probable defective ground past pin No.2
so make contact with negative lead to a
good
ground point or battery negative
terminal and check for voltage.
Voltage
........ Trouble is past pin No.2 of ©
No Voltage ... . Trouble is before pin No . 3 of © .
CAUTION:
Do not check for continuity while voltage is applied or it may
result in damage to the tester.
(d)
To check th'e low beam, place the dimmer switch at
LOW and perform the check in the same sequence.
(e) Check ground
point
1 The ground point is indicated by the W JIB No . 1
SET BOLT in the circuit.
2 The location of the ground point on the vehicle can
be found by referring to the same symbol W in
ELECTRICAL WIRING ROUTING.
-5-

B HOW TO USE THIS MANUAL
-6-
" ,-,
~ . POWER SOURtE (Power-load Refe
JIB No.2 (Engine Room)
..
p,-
''''' HEAD
LH
' ''''
HEAO RH
'M
ENGINE
'M
RADIO NO. 1
' M
HAZ · HORN
: • ___ m
r
I
-- -
.. _...
"
,
"
RELAY LOCATIONS
L ....
H~ldlighl LH
H ud light RH
Alt~niltOr . C/w'ge lit,Jht Re l~ 14A-C1
Fuel Cui Solenoid, Em issoion Cotmu l Com
E8CV, CUH ReI.,-, ~ S100r Cui
Radio a nd T""e Player
Ho rn
Haza ... :1 SIW, Tum Signa! FIWo«
. ~
,---------" ... r---... JIB NO.2
2. Inspection of Common Circuits
(a) Check
battery and fusible I ink
(b) Check related systems
Check how the HEAD FUSE is related to 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
related only to their respective headlights.
(c) Check
the circuit from the battery to the HEAD FUSE.
CD In system No. 1·2 (POWER SOURCE), tha power
circuits for all fuses are listed. The circuit between
the battery and HEAD fuse branches off with fuses
HAZ ·HORN lOA etc.
® Turn on the HAZARD switch
Okay ... .
Bad
.... . .
No
trouble in circuit up to HAZ·HORN
junction.
Trouble lies between fusible link and JIB
No.2.
(d) Check the HEADLIGHT RE LAY
(Return to HEADLIGHT page)
1
The circuit shows that the HEADLIGHT RELAY is
in JIB No. 2.
2 Installation of the relay can be found by referring
to the RELAY LOCAT.IONS. The HEADLIGHT
RELAY
is located in JIB No.2 in the engine com·
partment as shown.
3 Check for power to the headlight relay coil.
CD Turn the headlight switch to HEA~ .
® Using a voltmeter, check for voltage as showm
below.
{ Nagative
(-) Probe . . .. Pin No.4 of ® .
Positive (+) Probe .... . Pin No. 5 of <ill .
Confirm that there is voltage

"8 2~
l , ©
~ADlI&lll
.. 27 ~OUND PClINTS
::'1" -
.""
't:"
SYSTEM INDEX
COROLLA FR
1967_,PoQe,,,,roge.,
~~
=-
SYST ....
'-OC ~1 "'"
::;0;::.- ,~
-'l ., n_ ... '_ ........
C'j;ll .,
-,-
~
,. ---
§l.
,.
"""
._'" .... -- A-~
---
-if
,.
--
-
(!til
.. ..
-& H
-.
~
"
-,
.,
B
4 Next, check if the headlight relay points are closed
and there is power to the pin No. B of ®
See step l-(b)
If no voltage, trouble lies in the headlight relay.
(e) Check which systems (components) have the same
ground point.
The ground points are listed in system No. 27
(GROUND POINTS). As shown, GROUND POINT
W is used for other components besides the HEAD-
LIGHT SYSTEM, and it also connected to GROUND
POINT W.
(f) Check how the HEADLIGHT SYSTEM is connected to
the othe r systems.
1
From the EWD SYSTEM INDEX (facing the first
EWD), we can find the location of the headlight
system
within the ELECTRICAL WI RING
DIAGRAM at the back of the book (Page 3 of 4,
grid 7 and B) .
2
By referring to the ELECTRICAL WIRING
DIAGRAM, we can see that the HEADLIGHT
SYSTEM is related to the TAIL and ILLUMINA ·
TION SYSTEM.
NOTE:
The relationship between system circuits is not
shown so always confirm with the overall wiring
diagram.
(g) Re-check
After repair, check that the circuit functions normally.
Always follow the steps described above to narrow
down the possible range of the trouble .
-7-

C TROUBLESHOOTING
To Ignition S/W
IG Terminal
r -
( Fuse
'-
~
@
L
0 SIW , Voltmeter
@
l±::
,/
,--,
: Relay
@Ve
© T
~
;;
SIW2 / Solenoid
~
'-t- '-I
~
-:?-
--=
Ohmmeter
~
n
+ e
SIW ~
~
-, r
Ohmmeter~~~
kn
EEl e
Diode '-I -~- -I-'
Digital Type
Analog Type
1'OoOU .... <-..0 ",,,.
!"
a· I
<§~: ~
I~@'-~
D{~+@
- .. - ~ II
~ 10 ~ -@ .
~ -
-8-
VOLTAGE CHECK
(a) Establish conditions in which voltage is present at
the check point.
Example:
@- Ignition SNJ on
@- Ignition SNJ and SNJ 1 on
©- Ignition SNJ, SNJ 1 and Relay on (SNJ 2 off)
(b) Using a voltmeter, connect the negative lead to a
good ground
point or negative battery terminal,
and the positive lead to the connector or com·
ponent terminal. This check · can be don e with a
test
light inst ead of a voltmeter.
CONTINUITY AND RESISTANCE CHECK
(a) Disconnect the battery terminal or wire so there is
no voltage between the check points .
(b) Contact
the two leads of an ohmmeter to each of the
check points.
If the circuit has diodes, reverse the two leads and check
again.
When conta
ct ing the negative lead to the diode positive
side and the.positive lead
to the negative side, there should
be continuity.
When contacting the two le ads in reverse, there s hould be
no continuity.
(c) Use a volt/ohmmeter with high impedance (10 knl
V minimum) for troubleshooting of the electrical
circuit .

Test Light
To Ignition SIW
tG Terminal
Fuse Case
Short@
SIW 1
Short@
Disconnect ,-----...,
\
Light
=
SIW 2
~Disconnect
r---1o,
Relay
Short@
Disconnect
Solenoid
=
c
FINDING A SHORT CIRCUIT
(a) Remove the blown fuse and disconnect all loads of
the fuse.
(b) Connect a test lig
ht in place of the fuse.
(c) Establish
conditions in which the test light comes on.
Example:
@- Ignition SIW on
@- Ignition SIW and SIW 1 on
@- Ignition SIW, SIW 1 and Relay on (Connect the
Relay) and SIW 2 off (or Disconnect SIW 2)
(d) Disconnect and reconnect
the connectors while
watching the test light.
The short I ies between the connector where the test
light stays lit and the connector where the light goes
out.
(e) Find the exact location of the short by lightly shak-
ing the problem wire along the body.
-9-