Jack TOYOTA CAMRY V20 1986 Service Information

7. When necessary, use a sealer on gaskets to prevent
leaks.
8. Carefully observe all specifications for bolt tighten-
ing torques. Always use a torque wrench.
9. Use of special service tools (SST) and special ser-
vice materials (SSM) may be required, depending on
the nature of the repair. Be sure to use SST and SSM
where specified and follow the proper work proce-
dure. A list of SST and SSM can be found at the back
of this manual.
10. When replacing fuses, be sure the new fuse has the
correct amperage rating. DO NOT exceed the fuse
amp rating or use one of a lower rating.
11. Care must be taken when jacking up and supporting
the vehicle. Be sure to lift and support the vehicle at
the proper locations.
(a) If the vehicle is to be jacked up only at the front or
rear end, be sure to block the wheels in order to
ensure safety.
(b) After the vehicle is jacked up, be sure to support it
on stands. It is extremely dangerous to do any
work on the vehicle raised on jack alone, even for a
small job that can be finished quickly.
- INTRODUCTIONGeneral Repair InstructionsIN-5

7. INSPECT NO. 1 SPEED SENSOR IN COMBINATION
METER
(a) Remove the combination meter.
(b) Connect an ohmmeter between the terminals.
(c) Revolve the meter shaft and check that the meter
needle repeatedly deflects from 0 to 8

. 6. INSPECT NO. 2 SPEED SENSOR IN ATM
(a) Jack up a front wheel on one side.
(b) Connect an ohmmeter between the terminals.
(c) Spin the wheel and check that the meter needle de-
flects from 0 to 8 W. 5. INSPECT THROTTLE POSITION SENSOR
Using an ohmmeter, check the resistance between
each terminal. 4. INSPECT NEUTRAL START SWITCH
Inspect that there is continuity between terminal LL±C, 2L±
C and NL±C.
Throttle valve
conditionresistance (W) Shift
Position
TerminalTerminal
N range
2 range
L range
± AUTOMATIC TRANSAXLETroubleshooting (Electronic Control System) (A140E)AT±34

(A540E)
INSPECT NO. 2 SPEED SENSOR
(a) Jack up a front wheel on one side.
(b) Connect an ohmmeter between the terminals.
(c) Spin the wheel and check that the meter needle
deflects from 4 to 8W
10. (A540E)
INSPECT NO. 1 SPEED SENSOR IN COMBINATION
METER
(a) Remove the combination meter.
(b) Connect an ohmmeter between terminals A and B.
(c) Revolve the meter shaft and check that the mete
needle repeatedly deflects from 0 W to 8W 7. (A540E, A540H)
INSPECT NEUTRAL START SWITCH
Using an ohmmeter, check the continuity of the termi-
nals for each switch position shown in the table below.
(A540H)
8. (A540E, A540H)
INSPECT THROTTLE POSITION SENSOR
Using an ohmmeter, check the resistance between
each terminal.
Throttle valve
conditionResistance (kW )
Fully closed
Fully closed
Fully open
Terminal
TerminalRange
Open
± AUTOMATIC TRANSAXLETroubleshooting (Electronic Control System) (A540E and
A540H)AT±220

Diagnosis System
OUTPUT OF DIAGNOSTIC CODES
1. READ TYPE A CODE
(a) Turn the ignition switch on.
(b) Turn the set/coast switch on, and keep it on.
(e) Push the main switch on.
(d) Turn the set/coast switch oft.
(e) Meet the conditions listed below.
(f) Read the diagnostic code on the main switch indica-
tor.
HINT:
wTo save time performing the next test, do not turn off the
ignition switch when steps (a) ± (f) are completed.
wChecking of No. 4 code is done with the vehicle jacked
up and the engine idling.
wIf there is no indication code, perform diagnosis ±and
inspection. (See page Be±74)
Each cancel switch on (Stop light switch,
Parking brake switch, Clutch switch,
Neutral start switch)Each cancel switch circuit is
normal.Set/coast switch circuit is
normal.
Vacuum switch circuit is
normal.Resume/ accel switch
circuit is normal.
Speed sensor circuit is
normal.Speed sensor circuit is
normal.
Drive 30 km/h 0 9 mph) or belowDrive 40 km/h (25 mph) or overResume/accel switch on Set/coast switch on
Vacuum switch on
Indication code ConditionsDiagnosisNo.
± BODY ELECTRICAL SYSTEMCruise Control SystemBE±71

Deceleration Sensor Operation
Diagnosis System (For 4WD)
PRECAUTION
While checking the deceleration sensor diagnosis
system, A.B.S. does not work and brake system works as
normal brake system.
INSPECTION OF DIAGNOSIS SYSTEM
1. INSPECT BATTERY VOLTAGE
Inspect that the battery voltage is about 12 V.
2. CHECK THAT WARNING LIGHT TURNS ON
(a) Turn the ignition switch on.
(b) Check that the ºANTILOCKº warning light turns on for
3 seconds.
If not, inspect and repair or replace the fuse, bulb and wire
harness.
(e) Check that the ºANTILOCKº warning light turns off.
(d) Turn the ignition switch off.
3. PERFORM FOLLOWING STEPS
(a) Remove the rubber cap from the Ts connector lo-
cated in front of the actuator.
(b) Connect the terminals of Ts connector.
(c) Pull the parking brake lever up and depress the brake
pedal, and start the engine.
4. INSPECT SENSOR DETECTION POINT
(a) Jack up the rear side of the vehicle slowly as shown.
HINT: When measuring the height, measure at the center
of the rear bumper lower edge.
(b) Check that the warning light does not turn on.
(c) Jack down the vehicle and check that the warning
light blinking. (d) Check that the warning light blinks about 1 time every
1 second as shown.
If the warning light does not blink, inspect the parking brake
switch, stop light switch, Ts connector, deceleration sensor
installation and computer.
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±82

(d) Jack up the front side of the vehicle slowly as shown.
HINT: When measuring the height, measure at the center
of the lower body or spoiler edge of the vehicle.
(e) Check that the warning light does not turn on.
(f) Jack down the vehicle and check that the warning
light blinking.
If the warning light turns on, inspect the deceleration se
sor installation. And if the sensor installation is ±OK, r
place the deceleration sensor.
(e) Drive the vehicle straight ahead at about 20 km/h
(12.4 mph) or more, depress the brake pedal strong±
ly.
(f) Check that the warning light light pattern changes af-
ter braking as shown.
If the operation is not as specified, inspect the deceleration
sensor installation. And if the sensor installation is OK, r
place the deceleration sensor. 5. INSPECT SENSOR OPERATION
(a) Drive the vehicle straight ahead at about 10 km/h l6.2
mph) or more, lightly depress the brake pedal.
(b) Check that there is no change in the warning light
light pattern.
(c) Drive the vehicle straight ahead at about 20 km/h
(12.4 mph) or more, depress the brake pedal a little
strong.
(d) Check that the warning light turns on while braking.
6. REMOVE SHORT PIN
(a) Stop the engine.
(b) Remove the short pin or wire from the Ts connector.
(c) Install the rubber cap to the Ts connector.
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±83

The cooling system is composed of the water jacket (inside the cylinder block and cylinder head), radiator,
water pump, thermostat, electric fan, hoses and other components.
Coolant which is heated in the water jacket is pumped to the radiator, through which an electric fan blows air
to cool the coolant as it passes through. Coolant which has been cooled is then sent back to the engine by
the water pump, where it cools the engine.
The water jacket is a network of channels in the shell of the cylinder block and cylinder head through which
coolant passes. It is designed to provide adequate cooling of the cylinders and combustion chambers which
become heated during engine operation.
RADIATOR
The radiator performs the function of cooling the coolant which has passed through the water jacket and be-
come hot, and it is mounted in the front of the vehicle. The radiator consists of an upper tank and lower tank,
and a core which connects the two tanks. The upper tank contains the inlet for coolant from the water jacket
and the filler inlet. It also has a hose attached through which excess coolant or steam can flow. The lower
tank has an outlet and drain cock for the coolant. The core contains many tubes through which coolant flows
from the upper tank to the lower tank as well as cooling fins which radiate heat away from the coolant in the
tubes.
The air sucked through the radiator by the electric fan, as well as the wind generated by the vehicle's travel,
passes through the radiator, cooling the coolant. Models with automatic transmission include an automatic
transmission fluid cooler built into the lower tank of the radiator. A fan with an electric motor is mounted be-
hind the radiator to assist the flow of air through the radiator. The fan operates when the coolant tempera-
ture becomes high in order to prevent it from becoming too high.
RADIATOR CAP
The radiator cap is a pressure type cap which seals the radiator, resulting in pressurization of the radiator as
the coolant expands. The pressurization prevents the coolant from boiling even when the coolant tempera-
ture exceeds 100°C (212°F). A relief valve (pressurization valve) and a vacuum valve (negative pressure
valve) are built into the radiator cap. The relief valve opens and lets steam escape through the overflow pipe
when the pressure generated inside the cooling system exceeds the limit (coolant temperature: 110 ±
120°C, 230 ± 248°F, pressure; 0.3 ±1.0 kg/cm
2, 4.3 ±14.2 psi, 29.4 ± 98.1 kPa). The vacuum valve opens to
alleviate the vacuum which develops in the coolant system after the engine is stopped and the coolant tem-
perature drops.
The valves's opening allows the coolant in the reservoir tank to return to the cooling system.
RESERVOIR TANK
The reservoir tank is used to catch coolant which overflows the cooling system as a result of volumetric ex-
pansion when the coolant is heated. The coolant in the reservoir rank returns to the radiator when the cool-
ant temperature drops, thus keeping the radiator full at all times and avoiding needless coolant loss. Check
the reservoir tank level to find out if the coolant needs to be replenished.
WATER PUMP
The water pump is used for forced circulation of coolant through the cooling system. It is mounted on the
front of the cylinder block and driven by a timing belt.
THERMOSTAT
The thermostat has a wax type by±pass valve and is mounted in the water inlet housing. The thermostat in-
cludes a type of automatic valve operated by fluctuations in the coolant temperature. This valve closes when
the coolant temperature drops, preventing the circulation of coolant through the engine and thus permitting
the engine to warm up rapidly. The valve opens when the coolant temperature has risen, allowing the cir-
culation of coolant. Wax inside the thermostat expands when heated and contracts when cooled. Heating
the wax thus generates pressure which overpowers the force of the spring which keeps±the valve closed,
thus opening the valve. When the wax cools, its contraction causes the force of the spring to take effect
once more, closing the valve. The thermostat in this engine operates at a temperature of 82°C (180°F).
± COOLING SYSTEMDescriptionCO±3

INSPECTION OF EXHAUST PIPE
ASSEMBLY
CHECK CONNECTIONS FOR LOOSENESS OR DAMAGE
REPLACEMENT OF CATALYTIC
CONVERTERS
1. REMOVE CONVERTERS
(a) Jack up the vehicle.
(b) Check that the converter is cool.
(e) Remove the suspension lower crossmember.
(See page EM±44)
(d) Remove the front exhaust pipe (Sub±converter).
wLoosen the bolt, and disconnect the clamp the
exhaust pipe bracket.
wRemove the three nuts, and remove the exhaust pipe. Remove
the three nuts, and remove the exhaust pipe. Remove the gas-
ket.
(e) Remove the two bolts, two nuts and two converter stays.
(f) Remove the three bolts, two nuts, gasket, retainer, cushion and
main converter.
(g) Remove the eight bolts and two heat insulators from the main
converter.
To reduce HC, CO and NOx emissions, they are oxidized, reduced and converted to nitrogen (N2), carbon dioxide (C02)
and water (H20) by the catalyst.
THREE±WAY CATALYST (TWC) SYSTEM
OXIDATION
AND
REDUCTIONOXIDATION AND
REDUCTIONHC, CO AND
NOx
Exhaust Port
c02
H2O
N2 Exhaust
Gas
Main TWCSub±TWC
± EMISSION CONTROL SYSTEMS (3S±FE)Three±Way Catalyst (TWC) SystemEC±11

REPLACEMENT OF CATALYTIC
CONVERTER
1. REMOVE CONVERTER
(a) Jack up the vehicle.
(b) Check that the converter is cool.
(c) Remove the four bolts and nuts holding the pipes to the con-
verter.
(d) Remove the converter and two gaskets.
2. REINSTALL CONVERTER
(a) Place new two gaskets on the front and rear pipes.
(b) Install the converter with the bolts and nuts. Torque the bolts
and nuts. ,
Torque: 440 kg±cm (32 ft±Ib, 43 N±m)
INSPECTION OF HEAT INSULATOR
1. CHECK HEAT INSULATOR FOR DAMAGE
2. CHECK FOR ADEQUATE CLEARANCE BETWEEN
CATALYTIC CONVERTER AND HEAT INSULATOR
± EMISSION CONTROL SYSTEMS (2VZ±FE)Three±Way Catalyst (TWC) SystemEC±25

The 3S±FE engine is an in±line 4±cylinder engine with the cylinders numbered 1 ± 2 ± 3 ± 4 from the
front.
The crankshaft is supported by 5 bearing inside the crankcase. These bearing are made of aluminum
alloy.
The crankshaft is integrated with 8 weights for balance. Oil holes are placed in the center of the crank-
shaft to supply oil to the connecting rods, bearing, pistons and other components.
This engine's ignition order is 1 ± 3 ± 4 ± 2. The cylinder head is made of aluminum alloy, with a cross
flow type intake and exhaust layout and with pent±roof type combustion chambers. The spark plugs are
located in the center of the combustion chamber.
The intake manifold has 8 independent long ports and utilizes the inertial supercharging effect to im-
prove engine torque at low and medium speeds.
Exhaust and intake valves are equipped with irregular pitch springs made of special valve spring carbon
steel which are capable of functioning no matter what the engine speed.
The intake side camshaft is driven by a timing belt, and a gear on the intake side camshaft engages with
a gear on the exhaust side camshaft to drive it. The cam journal is supported at 5 places between the
valve lifters of each cylinder and on the front end of the cylinder head. Lubrication of the cam journal and
gear is accomplished by oil being supplied through the oiler port in the center of the camshaft.
Adjustment of the valve clearance is done by means of outer shim type system, in which valve adjusting
shims are located above the valve lifters. This permits replacement of the shims without removal of the
camshafts.
The resin timing belt cover is made of 2 pieces. A service hole is provided in the No. 1 belt cover for ad-
justing the timing belt tension.
Piston are made of high temperature±resistant aluminum alloy, and a depression is built into the piston
head to prevent interference with the valves.
Piston pins are the semi±floating type, with the pins fastened to the connecting rods by pressure fitting,
allowing the pistons and pins to float.
The No. 1 compression ring is made of steel and the No. 2 compression ring is made of cast iron. The oil
ring is made of a combination of steel and stainless steel. The outer diameter of each piston ring is
slightly larger than the diameter of the piston and the flexibility of the rings allows them to hug the cylin-
der walls when they are mounted on the piston rings No. 1 and No. 2 work to prevent gas leakage from
the cylinder and oil ring works to clear oil off the cylinder walls to prevent it from entering the combustion
chambers.
The cylinder block is made of cast iron. It has 4 cylinders which are approximately 2 times the length of
the piston stroke. The top of the cylinders is closed off by the cylinder head and the lower end of the cyl-
inders becomes the crankcase, in which the crankshaft is installed. In .addition, the cylinder block con-
tains a water jacket, through which coolant is pumped to cool the cylinders.
The oil pan is bolted onto the bottom of the cylinder block. The oil pan is an oil reservoir made of
pressed steel shoot. A dividing plate is included inside the oil pan to keep sufficient oil in the bottom of
the pan even when the vehicle is tilted. This dividing plate also prevents the oil from making waves when
the vehicle is topped suddenly and thus shifting the oil away from the oil pump suction pipe.
± ENGINE MECHANICALDescription (3S±FE)EM±3