wiring TOYOTA CAMRY V20 1986 Service Information

Terminal (Female)
Housing (Female)
Housing (Male)
Terminal (Male)
Wire
Harness
(W/H)Electric Wire
Terminal
Housing
Fuse
Other J/B
(Junction Block)
R/B
(Relay Block)
Insulator
Copper Wires
(Conductor)
B = Black W = White
L = Blue BR = Brown
V = Violet SB = Sky Blue
R = Red G = Green
P = Pink LG = Light Green
Y = Yellow GR = Gray
O = Orange
A±2
INTRODUCTION±GENERAL INFORMATION
3
Wire Harness Repair Manual (RM1022E)
What is Wire Harness?
The wire harness (W/H) is systems of electric wires for
automobiles to connect all the electronics parts in
automobile electrically and work them. As more electronics
parts are introduced in automobiles recently, the electric
wires used for the wire harness are increasing in number
and the structure is becoming more complicated. As a
result of that, there are hundreds of connectors, which is
the parts which connects wires mechanically and
electrically, in one vehicle. Therefore, numbers of the
connector terminal (Terminal) or the connector housing
(Housing) are designed to meet many kinds of uses of
circuits. Various components have been improved to
ensure the product reliability or realize a wider space in the
vehicles.
Wire Harness Components
Wire harness mainly consists of wires, terminals, or
housings.
There are various components are designed for many
parts of vehicles, such as one with high heat±resistance,
water±resistance, or bending ability, ones have different
current capacities, or ones are hardly influenced by
electromagnetic noise.
Electric Wire
The electric wires used for the wire harness consists of the
conductor made from numbers of twisted mild copper wire
with a diameter of less than 0.5 mm and the insulator
surrounding the conductor.
The insulator is generally made from vinyl chloride and
covers the conductor with even thickness. The insulators
are color±coded in order to distinguish each wire. The base
colors or the stripe patterns is used to make difference
between insulators. Each color of wires is indicated by the
abbreviation in the repair manual and the electrical wiring
diagram.
A

Push
Equal Amperage Rating
A±8
INTRODUCTION±CIRCUIT PROTECTION
9
Wire Harness Repair Manual (RM1022E)
CIRCUIT PROTECTION
All electrical circuits are protected against excessive loads which might occur because of shorts or
overloads in the wiring system. Such protection is provided by a fuse, circuit breaker, or fusible link, A
short circuit may cause a fuse to blow or a circuit breaker to open.
RESET CIRCUIT BREAKER
1. Remove Circuit Breaker
(a)Disconnect the negative (±) cable from the battery.
(b)Remove the circuit breaker.
2. Reset Circuit Breaker
(a)Insert the needle into the reset hole and push it.
(b)Using an ohmmeter, check that there is continuity
between both terminals of the circuit breaker.
If continuity is not as specified, replace the circuit breaker.
HINT: If replacing the circuit breaker, be sure to replace
it with a breaker with an equal amperage rating.
3. Install Circuit Breaker
(a)Install the circuit breaker.
(b)Connect the negative (±) cable to the battery.
HINT: If a circuit breaker continues to cut out, a short
circuit is indicated. Have the system checked by a qualified
technician.
A

Incorrect ignition timing
Ignition problems
wIgnition coil
wIgniter
wDistributor
wHigh±tension cords
Ignition wiring disconnected or broken
Spark plug faulty
Ignition wiring faulty
Incorrect ignition timing
Ignition problems
wIgnition coil
wIgniter
wDistributor
wHigh±tension cordsReset timing
Inspect coil
Inspect igniter
Inspect distributor
Inspect high±tension cords
Inspect wiring
Inspect coil
Inspect igniter
Inspect distributor
Inspect high±tension cords
Spark plug faulty
Ignition wiring faulty
Incorrect ignition timingIG±17, 20
IG±7, 12
IG±8, 12
IG±7, 12
IG±6, 10
Spark plug faulty
Incorrect ignition timing Engine will not start/
hard to start
(cranks OK)
TROUBLESHOOTING
Engine dieseling
(runs after ignition switch
is turned off)Inspect plugs
Inspect wiring
Reset tinningInspect plugs
inspect wiring
Reset timing
Muffler explosion
(after fire) all the timeEngine hesitates/
poor accelerationIG±7, 12
IG±8, 12
IG±7, 12
IG±6, 10
Inspect plugs
Reset timing Incorrect ignition timing
Incorrect ignition timing
Incorrect ignition timing
Incorrect ignition timing Poor gasoline mileageRough idle or stalls
IG±6, 10
120
Engine overheatsEngine backfiresPossible cause
Reset timing
Reset timingReset timingReset timingIG±17, 20 IG±17, 20
IG±17, 20
IG±17, 20 IG±17, 20
IG±17, 20 Problem
IG±6, 10
IG±6, 10 Remedy
Page
± IGNITION SYSTEMTroubleshootingIG±3

ON±VEHICLE INSPECTION (3S±FE)
SPARK TEST
CHECK THAT SPARK OCCURS
(a) Disconnect the high±tension cords from the spark plugs.
(b) Remove the spark plugs.
(c) Install the spark plugs to each high±tension cord.
(d) Ground the spark plug.
(e) Check if spark occurs while engine is being cranked.
HINT: To prevent gasoline from being injected from injectors
during this test, crank the engine for no more than 1
± 2 seconds at a time.
If the spark does not occurs, perform the test as follows:
CHECK RESISTANCE OF IGNITION COIL
(See page IG±7)
Resistance (Cold):
Primary 0.38 ± 0.46


Secondary 7.7 ± 10.4 k

CHECK POWER SUPPLY TO IGNITION
COIL AND IGNITER
1. Ignition switch turn to ON.
2. Check that there is battery voltage at
ignition coil positive (+) terminal. CHECK RESISTANCE OF HIGH±TENSION
CORD (See page IG±6)
Maximum resistance: 25 k
per cord
CHECK RESISTANCE OF SIGNAL
GENERATOR (PICKUP COIL) (See page
IG±8) Resistance: 140 ± 180


CHECK AIR GAP OF DISTRIBUTOR
(See page IG±7)
Air gap: 0.2 mm (0.008 in.) or moreCHECK CONNECTION OF IGNITION
COIL, IGNITER AND DISTRIBUTOR
CONNECTORS
Check wiring between ignition switch
to ignition coil and igniter.
Replace the distributor housing
assembly.
Replace the distributor housing
assembly.Replace the ignition coil.
TRY ANOTHER IGNITERReplace the cord(s). Connect securely. SPARK TEST
BAD BAD
BAD
BAD BAD
BAD
± IGNITION SYSTEMON±Vehicle Inspection (3S±FE)IG±5

ON±VEHICLE INSPECTION (2VZ±FE)
SPARK TEST
CHECK THAT SPARK OCCURS
(a) Disconnect the high±tension cord from the distributor.
(b) Hold the end approx. 12.5 mm (0.50 in.) from body of vehicle.
(c) See if spark occurs 'while engine is being cranked.
HINT: To prevent gasoline from being injected from injectors
during this test, crank the engine for no more than 1
± 2 seconds at time.
If the spark does not occurs, perform the test as follows:
CHECK RESISTANCE OF IGNITION COIL
(See page IG±12)
Resistance (Cold):
Primary 0.41 ± 0.50

Secondary 10.2 ± 13.8 k
CHECK POWER SUPPLY TO IGNITION COIL
1. Ignition switch turn to ON.
2. Check that there is battery voltage at
ignition coil positive (+) terminal.
CHECK RESISTANCE OF SIGNAL
GENERATOR (PICKUP COIL) (See page IG±8)
Resistance: 140 ±180
CHECK RESISTANCE OF HIGH±TENSION
CORDS (See page IG±10)
Maximum resistance: 25 k
per cord
CHECK AIR GAP OF DISTRIBUTOR
(See page IG±12)
Air gap: 0.2 mm 10.008 in.) or moreCHECK CONNECTION OF IGNITION COIL,
IGNITER AND DISTRIBUTOR CONNECTORS
Check wiring between ECU and distributor,
only then try another ECU.Check wiring between ignition switch to
ignition coil.
CHECK IGT SIGNAL FROM ECU
(See page FI±62)Replace the ignition coil.
Replace the distributor.
TRY ANOTHER IGNITERReplace the distributor. Replace the cord(s). Connect securely. SPARK TEST
BAD
BAD
BAD
BAD BAD
BAD
BAD
± IGNITION SYSTEMON±Vehicle Inspection (2VZ±FE)IG±9

GENERAL REPAIR INSTRUCTIONS
1. Use fender seat and floor covers to keep the vehicle clean
and prevent damage.
2. During disassembly, keep parts in the appropriate order to
facilitate reassembly.
3. Observe the following:
(a) Before performing electrical work, disconnect the neg-
ative cable from the battery terminal.
(b) If it is necessary to disconnect the battery for inspection
or repair, always disconnect the cable from the nega-
tive H terminal which is grounded to the vehicle body.
(c) To prevent damage to the battery terminal post, loosen
the terminal nut and raise the cable straight up
without twisting or prying it.
(d) Clean the battery terminal posts and cable terminals
with a shop rag.
o not scrape them with a file or other
abrasive objects.
(e) Install the cable terminal to the battery post with
the nut loose, and tighten the nut after installation. Do
not use a hammer to tap the terminal onto the post.
(f) Be sure the cover for the positive (+) terminal is properly
in place.
4. Check hose and wiring connectors to make sure that they are
secure and correct.
5. Non±reusable parts
(a) Always replace cotter pins, gaskets, 0±rings and oil
seals etc. with new ones.
(b) Non±reusable parts are indicated in the component il-
lustrations by the ºrº symbol.
IDENTIFICATION INFORMATION
VEHICLE IDENTIFICATION NUMBER
The vehicle identification number is stamped on the cowl
panel.
This number has also been stamped on the vehicle identifi-
cation number plate and certification regulation label.
A. Vehicle Identification Number
B. Vehicle Identification Number Plate
C. Certification Regulation Label
ENGINE SERIAL NUMBER
The engine serial number is stamped on the engine block as
shown.
± INTRODUCTIONIdentification InformationIN±4

GENERAL REPAIR INSTRUCTIONS
1. Use fender seat and floor covers to keep the vehicle clean
and prevent damage.
2. During disassembly, keep parts in the appropriate order to
facilitate reassembly.
3. Observe the following:
(a) Before performing electrical work, disconnect the neg-
ative cable from the battery terminal.
(b) If it is necessary to disconnect the battery for inspection
or repair, always disconnect the cable from the nega-
tive H terminal which is grounded to the vehicle body.
(c) To prevent damage to the battery terminal post, loosen
the terminal nut and raise the cable straight up
without twisting or prying it.
(d) Clean the battery terminal posts and cable terminals
with a shop rag.
o not scrape them with a file or other
abrasive objects.
(e) Install the cable terminal to the battery post with
the nut loose, and tighten the nut after installation. Do
not use a hammer to tap the terminal onto the post.
(f) Be sure the cover for the positive (+) terminal is properly
in place.
4. Check hose and wiring connectors to make sure that they are
secure and correct.
5. Non±reusable parts
(a) Always replace cotter pins, gaskets, 0±rings and oil
seals etc. with new ones.
(b) Non±reusable parts are indicated in the component il-
lustrations by the ºrº symbol.
IDENTIFICATION INFORMATION
VEHICLE IDENTIFICATION NUMBER
The vehicle identification number is stamped on the cowl
panel.
This number has also been stamped on the vehicle identifi-
cation number plate and certification regulation label.
A. Vehicle Identification Number
B. Vehicle Identification Number Plate
C. Certification Regulation Label
ENGINE SERIAL NUMBER
The engine serial number is stamped on the engine block as
shown.
± INTRODUCTIONGeneral Repair InstructionsIN±4

CENTER DIFFERENTIAL LOCK
CONTROL (E56F5)
SYSTEM DIAGRAM AND WIRING DIAGRAM
± MANUAL TRANSAXLECenter Differential Lock Control (E56F5)MT±113

SST (SPECIAL SERVICE TOOLS) (Cont'd)
Remarks:
* 1 2VZ±FE only
* 2 E52 and E56F5
* 3 E56F5 only
* 4 Speedometer driven gear oil seal
* 5 FWD/VZV21 and 4WD Windshield Moulding
Remover
Altemator Pulley Set
Nut Wrench Set
Diagnosis Check
WiringAlternator Rear
Bearing PullerDoor Hinge Set
Bolt Wrench
Wiring º'Aº EFI
Inspection
Hexagon 8 mm
WrenchOil Pressure
Switch Socket
Back±up Light
Switch Tool
Wiring ªFº
EFI Inspection
Spring Tension Tool
IllustrationPart Name Section
Part No.
Puller Set
EM
RA
BO
± SST AND SSMSST (Special Service Tools)C±19

Check battery specific gravity
Check or replace battery
Repair or replace cables
Adjust or replace clutch
start switch
Adjust or repair switch
Replace starter relay
Replace fusible link
Repair starter
Replace ignition switch Battery cables loose, corroded or worn
Clutch start switch faulty (M/T only)
Neutral start switch faulty (A/T only)
Starter relay faulty (M/T only)
Fusible link blown
Starter faulty
Ignition switch faulty
Check battery specific gravity
Charge or replace battery
Repair or replace cables
Repair starter
Pinion gear teeth broken or starter faulty
Flywheel teeth brokenBattery cables loose, corroded or worn
Starter faulty
Repair starter
Replace ignition switch
Repair wiring Starter faulty
Ignition switch faulty
Short in wiring
TROUBLESHOOTING
Starter spins ± engine
will not crankRepair starter
Replace flywheel Engine will not crank
Starter keeps runningBattery charge low
Engine cranks slowlyBattery charge lowPossible cause
Remedy ProblemPage
CH±2
CH±2
ST±3 ST±3
ST±3
ST±3 CL±4
± STARTING SYSTEMTroubleshootingST±2