ESP TOYOTA CAMRY V20 1986 Service Information

PRECAUTIONS
1. Before working the fuel system, disconnect the cable
from negative (±) terminal of the battery.
HINT: Any diagnostic code retained by the computer will be erased
when the battery terminal is removed. Therefore, if necessary, read
the diagnosis before removing the battery terminal.
2. Do not smoke or work open flame when working the fuel system.
3. Keep gasoline off rubber or leather parts.
INSPECTION PRECAUTIONS
MAINTENANCE PRECAUTIONS
1. CHECK CORRECT ENGINE TUNE±UP
(See page EM±8)
2. PRECAUTIONS WHEN CONNECTING GAUGE
(a) Use the battery as the power source for the timing light, tachome-
ter, etc.
(b) (3S±FE)
Connect the test probe of a tachometer to the service
connector of the distributor.
(c) (2VZ±FE)
Connect the test probe of a tachometer to the terminal
IG ± of the check connector.
3. IN EVENT OF ENGINE MISFIRE FOLLOWING
PRECAUTIONS SHOULD BE TAKEN
(a) Check proper connection of battery terminals, etc.
(b) Handle high±tension cords carefully.
(c) After repair work, check that the ignition coil terminals and
all other ignition system lines are reconnected securely.
(d) When cleaning the engine compartment, be especially
careful to protect the electrical system from water.
4. PRECAUTIONS WHEN HANDLING OXYGEN
SENSOR(S)
(a) Do not allow the oxygen sensor to drop or hit against an ob-
ject.
(b) Do not allow the sensor to come into contact with water.
± EFI SYSTEMInspection PrecautionsFI±5

IF VEHICLE IS EQUIPPED WITH MOBILE
RADIO SYSTEM (HAM, CB, ETC.)
The ECU has been designed so that it will not be affected ±by out-
side interference.
However, if your vehicle is equipped with a CB radio transceiver,
etc. (even one with about 10 W output), it may, at times, have an
affect upon ECU operation, especially if the antenna and feeder are
installed nearby.
Therefore, observe the following precautions:
1. Install the antenna as far as possible from the ECU. The
ECU is located under the radio so the antenna should be installed
at the rear side of the vehicle.
2. Keep the antenna feeder as far away as possible from the
ECU wires ± at least 20 cm (7.87 in.) ± and, especially, do not wind
them together.
3. Check that the feeder and antenna are properly adjusted.
4. Do not equip your± vehicle with a powerful mobile radio system.
5. Do not open the cover or the case of the ECU unless absolutely nec-
essary. (If the IC terminals are touched, the IC
may be destroyed by static electricity.)
AIR INDUCTION SYSTEM
1. Separation of the engine oil dipstick, oil filler cap, PCV hose,
etc. may cause the engine to run out¿¿ tune.
2. Disconnection, looseness or cracks in the parts of the air
induction system between the throttle body and cylinder
head will allow air suction and cause the engine to run out of tune.
ELECTRONIC CONTROL SYSTEM
1. Before removing EFI wiring connectors, terminals, etc., first discon-
nect the power by either turning the ignition switch
OFF or disconnecting the battery terminals.
2. When installing the battery, be especially careful not to
incorrectly connect the positive (+) and negative (±) cables.
3. Do not permit parts to receive a severe impact during removal or
installation. Handle all EFI parts carefully, especially the ECU.
4. Do not be careless during troubleshooting as there are numerous
transistor circuits and even slight terminal contact can cause fur-
ther troubles.
5. Do not open the ECU cover.
6. When inspecting during rainy weather, take care to prevent
entry of water. Also, when washing the engine compartment, pre-
vent water from getting on the ER parts and wiring connectors.
7. Parts should be replaced as an assembly.
± EFI SYSTEMInspection PrecautionsFI±6

Diode Ohmmeter
Diode Ohmmeter
Digital Type Analog Type
Bulb Ohmmeter
A±6
INTRODUCTION±HOW TO PERFORM FOR SYSTEM INSPECTION
7
Wire Harness Repair Manual (RM1022E)
If the circuit has diodes, reverse the two leads and check
again.
When touching the negative (±) lead to the diode positive
(+) side and the positive (+) lead to the negative (±) side,
there should be continuity. When touching the two leads in
reverse, there should be no continuity.
HINT: Specifications may vary depending on the type of
tester, so refer to the tester's instruction manual before
performing the inspection.
Check LED (Light Emitting Diode) in the same manner as
that for diodes.
HINT:

Use a tester with a power source of 3V or greater to
overcome the circuit resistance.

If a suitable tester is not available, apply battery
voltage and check that the LED lights up.
(c)Use a volt/ohmmeter with high impedance (10kW/V
minimum) for troubleshooting of the electrical circuit.
3. Bulb Check
(a)Remove the bulb.
(b)There should be continuity between the respective
terminals of the bulb together with a certain amount
of resistance.
(c)Apply the two leads of the ohmmeter to each of the
terminals.
(d)Apply battery voltage and check that the bulb light up.
A

TERMINAL AND CONNECTOR REPAIR±TERMINAL REPLACEMENT
B±4
14
Wire Harness Repair Manual (RM1022E)
Step 1. Identify the connector and the terminal type.
Confirm whether the connector you require is the non±waterproof, waterproof or combined terminal type
connector from the pictures provided in the following charts.
Connector
Description
Non±Waterproof TypeThose connectors which are not of the
waterproof or combined terminal type.
Waterproof TypeWaterproof material (hole plug or terminal
packing) is provided on the terminal/connector
body.
Combined Terminal TypeTerminals of different shape/size are located in
one connector.
1. Terminal with Wire
Identify the part number of the terminal with wire by picking
out the corresponding illustration from the pictures
provided on the following charts.
HINT: In some of the illustrations, there are two part
numbers for the same illustration of terminal with wire,
because although the shapes of the terminals are
completely the same, there is a difference in with /without
gold±plating (gilded).
Remark: T h e length of the wire connected to the
terminal is approximately 150 mm.
B

Example:
Back of the
Connector Body
P/N 90980±10854
B±5
TERMINAL AND CONNECTOR REPAIR±TERMINAL REPLACEMENT
15
Wire Harness Repair Manual (RM1022E)
NOTICE:

When the terminal used is gold plated, be sure to
replace it with a gold plated terminal when marking
repairs.

Do not use male and female terminals which are
made of different materials from each other.
2. Connector Body
(a)Identify the part number of the corresponding
terminal with wire according to the above±mentioned
1.
(b)Identify the part number of the connector body by
picking out the correct one from the illustrations
according to the number of terminals and the shape.
HINT:
(a)If you can find no connector which matches the type
you require, pick out male and female connector
bodies as a set which have more terminals than you
require.
For the combined terminal type connector body, pick
out and appropriate connector body for each terminal
being used.
Example:
When two types of terminal are used in one connector
body, pick out a male and female for two different
connector bodies.
(b)The part number has been stamped on the back of
the connector body. (This will continue to be done to
new types of connector.)
B

Hole Plug
Connector Body
Terminal
Packing
Small (Red)
Large (Yellow) Medium (Blue)
Medium (Blue) 1.0±2.0 mm
Large (Yellow) 3.0±5.0 mmWire Outside
DiameterSleeve Size
(Color)
Small (Red) 0.2±1.0 mm
Wire Outside Diameter
Insulation Calipers
TERMINAL AND CONNECTOR REPAIR±TERMINAL REPLACEMENT
B±6
16
Wire Harness Repair Manual (RM1022E)
3. Hole Plug/Terminal Packing
(a)Identify the part number of the appropriate terminal
with wire/connector body from the illustrations of
waterproof type connector according to the
above±mentioned 1 and 2.
(b)Identify the part number of the hole plug/terminal
packing from the corresponding illustration.
4. Sleeve
When connecting two wires using a sleeve, select the
sleeve according to the following table.
(a)When size is based on the outside diameter of the
wire.
B

Tool Hole
Terminal LanceSpecial
Tool
Special
Tool
Tool HoleSpecial Tool
Terminal
Lance Special Tool 0.64 Type
B±25
TERMINAL AND CONNECTOR REPAIR±TERMINAL REPLACEMENT
35
Wire Harness Repair Manual (RM1022E)
Insulation Displacement Connector Type
(a)Using a special tool, push the terminal lance from the
tool hole.
(b)Carefully withdraw the terminal from the connector by
pulling the lead toward the rear of the connector.
NOTICE:

Do not use too much force. If the terminal does not
come out easily, repeat step (a).

Always change the wire with the repair wire, in
accordance with page B±27.

F±17
TABLE OF REPAIR WIRE, TERMINAL PACKING, HOLE PLUG AND PRESS SLEEVE
Wire Harness Repair Manual (RM1022E)
395
Repair Wire (Non±waterproof Type)
TypeSP
Female (Power)Female (Signal)
Sleeve : Medium (Blue) or Large (Yellow)Sleeve : Medium (Blue) or Large (Yellow)
P/N82998±1252082998±12530
TypeTLC
MaleFemale
Sleeve : Medium (Blue)Sleeve : Medium (Blue)
P/N82998±1222082998±12230
TypeTNS
MaleFemale
Sleeve : Medium (Blue)Sleeve : Medium (Blue)
P/N82998±1224082998±12250

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

GENERAL MAINTENANCE
These are the maintenance and inspection items
which are considered to be the owner's responsibility,
They can be performed by the owner or he
can have then done at a service shop. These items
include those which should be checked on a daily ba-
sis, those which, in most cases, do not require
(special) tools and those which are considered to be
reasonable for the owner to perform.
Items and procedures for general maintenance are as
follows:
OUTSIDE VEHICLE
1. TIRES
(a) Check the pressure with a gauge. Adjust
if necessary.
(b) Check for cuts, damage or excessive wear.
2. WHEEL NUTS
When checking the tires, check the nuts for looseness
or for missing nuts. If necessary,
tighten them.
3. TIRE ROTATION
It is recommended that tires be rotated every
7,500 miles (12,000 km).
4. WINDSHIELD WIPER BLADES
Check for wear or cracks whenever they do not wipe
clean. Replace if necessary.
5. FLUID LEAKS
(a) Check underneath for leaking fuel, oil, water or
other fluid.
(b) If you smell gasoline fumes or notice any leak,
have the cause found and corrected.
6. DOORS AND ENGINE HOOD
(a) Check that all doors including the trunk lid and
back door operate smoothly, and that all
latches lock securely.
(b) Check that the engine hood secondary latch se-
cures the hood from opening when the prima-
ry latch is released.
INSIDE VEHICLE
7. LIGHTS
(a) Check that the headlights, stop lights, taillights,
turn signal lights, and other
lights are all working.
(b) Check the headlight aiming.8. WARNING LIGHTS AND BUZZERS
Check that all warning lights and buzzers func-
tion properly.
9. HORN
Check that it is working.
10. WINDSHIELD GLASS
Check for scratches, pits or abrasions.
11. WINDSHIELD WIPER AND WASHER
(a) Check operation of the wipers and washer.
(b) Check that the wipers do not streak.
12. WINDSHIELD DEFROSTER
Check that air comes out from the defroster out-
let when operating the heater or air conditioner
at defroster mode.
13. REAR VIEW MIRROR
Check that it is mounted securely.
14. SUN VISORS
Check that they move freely and are mounted
securely.
15. STEERING WHEEL
Check that it has the specified freeplay. Be alert
for changes in steering condition, such as hard
steering, excessive freeplay or strange noise.
16. SEATS
(a) Check that all front seat controls such as
seat adjusters, seatback recliner, etc.
operate smoothly.
(b) Check that a11 latches lock securely in
any position.
(c) Check that the locks hold securely in any
latched position.
(d) Check that the head restraints move up
and down smoothly and that the locks
hold securely in any latched position.
(e) For folding±down rear seat backs, check
that the latches lock securely.
17. SEAT BELTS
(a) Check that the seat belt system such as
buckles, retractors and anchors operate
properly and smoothly.
(b) Check that the belt webbing is not cut,
frayed, worn or damaged.
± MAINTENANCEGeneral MaintenanceMA±16