TOYOTA AVALON 2001 Service Repair Manual

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.

CO-30
- COOLINGENGINE COOLANT TEMPERATURE (ECT) SWITCH
1223 Author
: Date
:
2001 AVALON (RM808U)
4. REFILL ENGINE COOLANT
5. START ENGINE AND CHECK FOR COOLANT LEAKS

CO02W-03
B09039
Radiator
No.1 ECT Switch
No.2 Cooling Fan Connector
Upper Radiator
Support
Upper Radiator
HoseNo.1 Cooling Fan Connector
No.1 ECT Switch Wire Connector
Radiator Assembly
Lower Radiator
Support
O-Ring
A/T Oil Cooler Hose
No.3 Engine
Room Relay Block No.1 Cooling Fan

Non-reusable part
O-Ring
Drain Plug
Lower Radiator
Hose
No.2 Cooling Fan
Battery
Insulator
Battery
Battery
Tray Hold-Down
Clamp
Engine Under Cover
- COOLINGRADIATOR
CO-15
1208 Author
: Date
:
2001 AVALON (RM808U)
COMPONENTS

B09036

O-Ring

Non-reusable partUpper Tank
Cushion
Core
Oil Cooler
Lower TankInlet Pipe
Plate WasherNut

O-Ring
O-Ring
CO-16
- COOLINGRADIATOR
1209 Author
: Date
:
2001 AVALON (RM808U)

CO02Y-03
CO1205
Dimension ºBºPart ºAº
Stopper Bolt SST
Claw
Overhaul Handle
B09048
Tank
SST
Lock Plate
Stopper Bolt
B09042
Ta p
B09043
CO-18
- COOLINGRADIATOR
1211 Author
: Date
:
2001 AVALON (RM808U)
DISASSEMBLY
1. REMOVE CUSHION FROM RADIATOR
2. ASSEMBLE SST
SST 09230-01010
(a) Install the claw to the overhaul handle, inserting it in the
hole in part ºAº as shown in the diagram.
(b) While gripping the handle, adjust the stopper bolt so that
dimension ºBº shown in the diagram is 0.2 - 0.5 mm
(0.008 - 0.020 in.).
NOTICE:
If this adjustment is not done, the claw may be damaged.
3. UNCAULK LOCK PLATES
Using SST to release the caulking, squeeze the handle until
stopped by the stopper bolt.
SST 09230-01010
4. REMOVE TANKS AND O-RINGS
(a) Lightly tap the bracket of the radiator (or radiator hose in-
let or outlet) with a soft-faced hammer and remove the
tank.
(b) Remove the O-ring.
5. REMOVE OIL COOLER FROM LOWER TANK
(a) Remove the pipe.
(b) Remove the nuts and plate washers.
(c) Remove the oil cooler and O-rings.