ECO mode TOYOTA CAMRY V20 1986 Service Information

Condenser Fan Control Amplifier
INSPECT AMPLIFIER CIRCUIT
Disconnect the amplifier and inspect the connector on the
wire harness side as shown in the chart below. If the circuit is as specified, replace the amplifier.
If circuit is as specified, replace the amplifier. 2VZ±FE Engine Model
Approx. 1.5 k
at 27°C (77°F)
Turn ignition switch off.
Turn ignition switch off. Turn ignition switch on±. Turn ignition switch on. Turn ignition switch off.Turn ignition switch on. Turn ignition switch off. Turn ignition switch on.
Turn A/C switch on.
Turn A/C switch on.
Turn A/C switch off. Turn A/C switch off.
Tester
connection
Approx. 10 to 14 V Tester
connection
Specified valueSpecified value
Battery voltageBattery voltageBattery voltage Battery voltage
Battery voltage
Approx. 250
Battery voltage
Start engine.
Stop engine.
No voltageNo voltage
No voltage
No voltage
No voltage ContinuityNo voltageNo voltage
ContinuityContinuity
Continuity Continuity
Continuity
Condition
Continuity ResistanceCondition
Check forCheck for
Constant Constant Constant
Constant Constant
Constant Constant
VoltageVoltage
± AIR CONDITIONING SYSTEMAmplifiersAC±46

4. REMOVE EXTENSION HOUSING
(a) Remove the dust deflector from the extension housing.
(b) Remove the four bolts and extension housing.
(c) Remove the O±ring from the extension housing. 3. REMOVE DYNAMIC DAMPER
Remove the four bolts and dynamic damper.
REMOVAL OF COMPONENT PARTS
7. REMOVE TRANSFER MODE SELECT LEVER AND ROD
2: REMOVE REAR WHEEL SPEED SENSOR
(a) Remove the bolt and pull out the speed sensor.
(b) Remove the O±ring from speed sensor.
(d) Using SST, remove the oil seal.
SST 09308±00010
± AUTOMATIC TRANSAXLEComponent Parts (Transfer A540M)AT±344

23. INSTALL TRANSFER MODE SELECT LEVER AND ROD
(a) Install the lever, rod and lever guide.
1bI Install and torque the two bolts.
Torque: (A) 55 kg±cm (48 in.±Ib, 5.4 N±m)
115 kg±cm (8 ft±Ib, 11 N±m)
(c) Install the bolt while setting the lever as shown.
Torque: 115 kg±cm (8 ft±Ib, 11 N±m)
± AUTOMATIC TRANSAXLEComponent Parts (Transfer Transfer Lower Valve Body
A540H)AT±380

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

PRECAUTIONS WHEN TOWING
FULL±TIME 4WD VEHICLES
1. Use one of the methods shown below to tow the vehicle.
2. When there is trouble with the chassis and drivetrain, use
method [1] (flat bed truck) or method T (sling type tow
truck with doilies)
3. Recommended Methods: No. [1], [2], or [3]
Emergency Method: No. [4]
During towing with this towing method, there is a danger of the drivetrain
heating up and causing breakdown, or of the front wheels flying off the dolly.
HINT: Do not use any towing methods other than those shown above.
For example, the towing method shown below is dangerous, so do not use it
HINT: Do not tow the vehicle at a speed
faster than 18 mph (30 km/h) or a distance
greater than 50 miles (80 km). Free or
Lock
Center
Differential
Control
Switch
ºONº or
ªOFFªFree
(Normal
Driving)
No
Special
Operation
Necessary
Free
Center
Differential
Control
Switch
ªOFFº Free
Center
Differential
Control
Switch
ºOFFºMode
Select
Lever on
Transaxle T/M Shift
Lever
PositionT/M Shift
Lever
PositionCenter
Diff.
Control
Switch Automatic Transaxle Type of Transaxle
ºAUTOº
or
ºOFFº Manual Transaxle
Towing MethodParking
BrakeParking
Brake Center
Diff.
ºNº range ºNº range ºPº range
Released1 st Gear
Released
ReleasedApplied Applied
Release
Neutral NeutralºOFFº
ºOFFº
± INTRODUCTIONPrecautions When Servicing Full±Time 4WD VehiclesIN±26

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