2001 TOYOTA AVALON Service Repair Manual

CO02L-03
B09030Drain PlugDrain Plug
CO-2
- COOLINGCOOLANT
1195 Author
: Date
:
2001 AVALON (RM808U)
REPLACEMENT
1. DRAIN ENGINE COOLANT
(a) Remove the radiator cap from the water outlet.
CAUTION:
To avoid the danger of being burned, do not remove the ra-
diator cap while the engine and radiator are still hot, as fluid
and steam can be blown out under pressure.
(b) Loosen the radiator drain plug and engine drain plugs,
and drain the coolant.
(c) Close the drain plugs.
Torque:
RH engine drain plug on cylinder block side cover:
7 N´m (70 kgf´cm, 61 in.´lbf)
LH engine drain plug on union:
13 N´m (130 kgf´cm, 9 ft´lbf)
2. FILL ENGINE COOLANT
(a) Slowly fill the system with coolant.

Use of improper coolants may damage engine cool-
ing system.

Use ºToyota Long life Coolantº or equivalent and
mix it with plan water according to the manufactur-
er's directions.

Using of coolant which includes more than 50 %
(freezing protection down to -35°C (-31°F) or 60 %
(freezing protection down to -50°C (-58°F)) of eth-
ylene-glycol is recommended but not more than 70
%.
NOTICE:

Do not use an alcohol type coolant or plain water
alone.

The coolant should be mixed with plain water (prefer-
ably demineralized water or distilled water).
Capacity: 9.0 liters (9.5 US qts, 7.9 lmp. qts)
(b) Install the radiator cap.
(c) Start the engine, and bleed the cooling system.
(d) If necessary, refill coolant into the reservoir up to the
ºFULLº line.
3. CHECK ENGINE COOLANT FOR LEAKS
4. CHECK ENGINE COOLANT SPECIFIC GRAVITY COR-
RECTLY

CO0WV-01
B09038
No.1 Cooling FanNo.1 Cooling Fan Connector
Hold-Down
Clamp

Non-reusable partNutFanFan Shroud
Fan Motor
No.1
Battery
Insulator
Battery
Battery
Tray
Cruise Control
Actuator
No.3 Engine Room
Relay Block
- COOLINGELECTRIC COOLING FAN
CO-25
1218 Author
: Date
:
2001 AVALON (RM808U)
COMPONENTS

B09037
No.2
Fan
NutFan Shroud
Fan Motor
No.2 Cooling Fan Connector
No.2 Cooling Fan
Upper Radiator Hose

Non-reusable part
No.1 ECT Switch Wire Connector
No.1 ECT Switch Wire
CO-26
- COOLINGELECTRIC COOLING FAN
1219 Author
: Date
:
2001 AVALON (RM808U)

CO09R-02
CO-28
- COOLINGELECTRIC COOLING FAN
1221 Author
: Date
:
2001 AVALON (RM808U)
INSTALLATION
Installation is in the reverse order of removal. (See page CO-27)

B09054
CO0WU-01
B09056
B09434
B09432
B09435
- COOLINGELECTRIC COOLING FAN
CO-23
1216 Author
: Date
:
2001 AVALON (RM808U)
ELECTRIC COOLING FAN
ON-VEHICLE INSPECTION
1. CHECK COOLING FAN OPERATION WITH LOW TEM-
PERATURE (Below 83°C (181°F))
(a) Turn the ignition switch ON.
(b) Check that the cooling fans stop.
If not, check the cooling fan relays and ECT switches.
(c) Disconnect the No.1 ECT switch wire connector.
(d) Connect terminals on the No.1 ECT switch wire connec-
tor.
(e) Check that the No.1 cooling fan rotates at high speed.
If not, check the No.1 cooling fan relay and No.1 cooling fan.
(f) Reconnect the No.1 ECT switch connector.
(g) Disconnect the No.2 ECT switch connector.
(h) Ground terminal on the No.2 ECT switch wire harness
side connector.
(i) Check that the No.1 and No.2 cooling fans rotate at low
speed.
If not, check the No.2 cooling fan relay, No.3 cooling fan relay
and No.2 cooling fan.
(j) Reconnect the No.2 ECT switch connector.

B09050
Ammeter
Battery
B09053
Ammeter
Battery CO-24
- COOLINGELECTRIC COOLING FAN
1217 Author
: Date
:
2001 AVALON (RM808U)
2. INSPECT NO.1 COOLING FAN
(a) Disconnect the cooling fan connector.
(b) Connect battery and ammeter to the cooling fan connec-
tor.
(c) Check that the cooling fan rotates smoothly, and check
the reading on the ammeter.
Standard amperage: 8.5 - 11.5 A at 20°C (68°F)
(d) Reconnect the cooling fan connector.
3. INSPECT NO.2 COOLING FAN
(a) Disconnect the cooling fan connector.
(b) Connect battery and ammeter to the cooling fan connec-
tor.
(c) Check that the cooling fan rotates smoothly, and check
the reading on the ammeter.
Standard amperage: 8.5 - 11.5 A at 20°C (68°F)
(d) Reconnect the cooling fan connector.

CO09O-02
B09051
No.1
B09052
No.2
- COOLINGELECTRIC COOLING FAN
CO-27
1220 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
REMOVE COOLING FANS
(a) Remove the No.1 cooling fan.
(1) Remove the batter and battery tray.
(2) Disconnect the cruise control actuator.
(3) Disconnect the No.3 engine room relay block from
radiator.
(4) Disconnect the cooling fan connector.
(5) Disconnect the wire clamps from the fan shroud.
(6) Remove the 2 bolts and cooling fan.
Torque: 5.0 N´m (50 kgf´cm, 44 in.´lbf)
(b) Remove the No.2 cooling fan.
(1) Drain the engine coolant.
(2) Disconnect the upper radiator hose from the radia-
tor.
(3) Disconnect the cooling fan and No.1 ECT switch
wire connectors.
(4) Disconnect the wire clamps from the fan shroud.
(5) Disconnect the No.1 ECT switch connector.
(6) Remove the 2 bolts and cooling fan.
Torque: 5.0 N´m (50 kgf´cm, 44 in.´lbf)

CO037-03
S04602No.1 ECT Switch
P01924
Ohmmeter
B04397
No.2 ECT
Switch
P06722
Ohmmeter
- COOLINGENGINE COOLANT TEMPERATURE (ECT) SWITCH
CO-29
1222 Author
: Date
:
2001 AVALON (RM808U)
ENGINE COOLANT
TEMPERATURE (ECT) SWITCH
INSPECTION
1. DRAIN ENGINE COOLANT
2. INSPECT NO.1 ECT SWITCH
(a) Remove the No.1 ECT switch.
(b) Inspect the No.1 ECT switch.
(1) Using an ohmmeter, check that there is continuity
between the terminals when the coolant tempera-
ture is above 98°C (208°F).
If there is no continuity, replace the switch.
(2) Check that there is no continuity, between the termi-
nals when the coolant temperature is below 88°C
(190°F).
If there is continuity, replace the switch.
(c) Reinstall the No.1 ECT switch.
3. INSPECT NO.2 ECT SWITCH
(a) Remove the No.2 ECT switch.
(b) Inspect the No.2 ECT switch.
(1) Using an ohmmeter, check that there is continuity
between terminals when the coolant temperature is
above 93°C (199°F).
If there is no continuity, replace the switch.
(2) Check that there is no continuity between the termi-
nals when the coolant temperature is below 83°C
(181°F).
If there is continuity, replace the switch.
(c) Reinstall the No.2 ECT switch.