cooling TOYOTA AVENSIS 2005 Service Service Manual

160MD±01
A79169
Water Drain
Plug
Radiator Drain Plug
A63951
A
B 16±44
± COOLINGENGINE COOLANT (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
ENGINE COOLANT (1CD±FTV)
REPLACEMENT
1. DRAIN ENGINE COOLANT
(a) Remove the radiator cap.
(b) Loosen the radiator and engine drain plugs, drain the
coolant.
(c) Close the drain plugs.
Torque: 13 N
m (133 kgf
cm, 10 ft
lbf) for engine
2. ADD ENGINE COOLANT
(a) Loosen air bleed valve A.
(b) Fill the cooling system with coolant up to line B.
Capacity:
With heater: 7.6 liters (8.0 US qts, 6.7 lmp. qts)
Without heater: 7.4 liters (7.8 US qts, 6.5 lmp. qts)
HINT:

Use of improper coolants may damage engine cooling
system.

Use ºToyota Long Life Coolantº or equivalent and mix it
with plain water according to the manufacturer's instruc-
tion.

Using of coolant which includes more than 50 % (freezing
protection down to ±35C (±31F)) or 60 % (freezing
protection down to ±50C (±58F)) of ethylene±glycol is
recommended but not more than 70 %.
(c) Tighten the air bleed valve securely.
(d) Install the radiator cap securely.
(e) Warm up the engine.
HINT:
Warm up the engine with the speed of 2,000 rpm or more and
keep the warm±up until the thermostat has open and the radia-
tor reservoir has become hot.
(f) Run the engine intermittently for 5 seconds at 3,000 rpm
and for 45 seconds at idle.
(g) Do the above operation for 7 minutes or more.
(h) After the engine has become cold, check that the coolant
level is between LOW and FULL lines.

± COOLINGENGINE COOLANT (1CD±FTV)
16±45
AVENSIS REPAIR MANUAL (RM1018E)
3. CHECK FOR ENGINE COOLANT LEAKS
(a) Fill the radiator with coolant and attach a radiator cap tester.
(b) Pump it to 137 kPa (1.4 kgf/cm
2,
19.9 psi), and check that the pressure does not drop.

160N8±01

 

 

A35654
A30519
E34090
16±42
± COOLINGCOOLING FAN SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION
1. INSPECT COOLING FAN RELAY
(a) Continuity inspection.
(1) Using an ohmmeter, check for continuity between
each terminal.
Specified condition:
Terminal No.Specified condition
1 ± 2Continuity
No continuity
3 ± 5Continuity
(Apply battery voltage terminals 1 and 2)
2. INSPECT COOLING FAN RELAY NO.2
(a) Continuity inspection.
(1) Using an ohmmeter, check for continuity between
each terminal.
Specified condition:
Terminal No.Specified condition
1 ± 2
3 ± 4Continuity
No continuity
3 ± 5Continuity
(Apply battery boltage terminals 1 and 2)
3. INSPECT COOLING FAN RELAY NO.3
(a) Continuity inspection.
(1) Using an ohmmeter, check for continuity between
each terminal.
Specified condition:
Terminal No.Specified condition
1 ± 2Continuity
No continuity
3 ± 5Continuity
(Apply battery voltage terminals 1 and 2)

P05962
Ohmmeter
± COOLINGCOOLING FAN SYSTEM (1CD±FTV)
16±43
AVENSIS REPAIR MANUAL (RM1018E)
4. INSPECT TEMPERATURE DETECT SWITCH NO.2
(a) Using an ohmmeter, check that there is continuity be-
tween the terminals when the coolant temperature is
above 93
C (199
F).
Specified condition: Continuity
(b) Using an ohmmeter, check that there is no continuity be-
tween the terminals when the coolant temperature is be-
low 83
C (181
F).
Specified condition: No continuity

1606N±03
A57065
21


± COOLINGCOOLING FAN SYSTEM (1CD±FTV)
16±41
AVENSIS REPAIR MANUAL (RM1018E)
COOLING FAN SYSTEM (1CD±FTV)
ON±VEHICLE INSPECTION
1. CHECK COOLING FAN OPERATION WITH LOW TEMPERATURE (Below 83
C (181
F))
(a) Turn the ignition switch ON.
(b) Check that the cooling fan stops.
(c) Disconnect the temperature detect switch connector.
(d) Connect the terminals on the temperature detect switch connector.
(e) Check that the cooling fan rotates.
If not, check the fuses, cooling fan relay and cooling fan, and check for a open circuit between the cooling
fan relay and temperature detect switch.
(f) Reconnect the temperature detect switch connector.
2. CHECK COOLING FAN OPERATION WITH HIGH TEMPERATURE (Above 93
C (199
F))
(a) Start the engine, and raise coolant temperature to above 93
C (199
F)
HINT:
Coolant temperature is the detected value by the temperature detect switch on the radiator lower tank.
(b) Check that the cooling fan rotates.
If not, replace the temperature detect switch.
3. INSPECT COOLING FANS
(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:
Approx. 13.2 A at 20
C (68
F)
(d) Reconnect the cooling fan connector.

160N7±01
B08008
CO0929
B08007
8.5mm
± COOLINGCOOLING SYSTEM (1CD±FTV)
16±39
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION
1. INSPECT THERMOSTAT
HINT:
The thermostat is numbered with the valve opening tempera-
ture.
(a) Immerse the thermostat in water and gradually heat the
water.
(b) Check the valve opening temperature of the thermostat.
Valve opening temperature:
80 to 84C (176 to 183F)
If the valve opening temperature is not as specified, replace the
thermostat.
(c) Check the valve lift.
Valve lift: 8.5 mm (0.33 in.) or more at 95C (203F)
If the valve lift is not as specified, replace the thermostat.
(d) Check that the valve is fully closed when the thermostat
is at low temperatures (below 77C (171F)).
If not closed, replace the thermostat.
2. INSPECT RESERVE TANK CAP SUB±ASSY
NOTICE:

If the radiator cap is contaminatied, rinse it with water.

Before using a radiator cap tester, wet the relief valve
and the pressure valve with engine coolant or water.

When performing following steps (a) and (b), keep the
tester at an angle of over 30 above horizontal.

B08802
Radiator Cap Tester
30
or
more Reserve tank Cap
A55603Drain Hole
Turn
16±40
± COOLINGCOOLING SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
(a) Using a radiator cap tester, slowly pump the tester and
check that air is coming from the vacuum valve.
Pump speed: 1 push / 3 seconds or more
NOTICE:
Push the pump at a constant speed.
If air is not coming from the vacuum valve, replace the reserve
tank cap.
(b) Pump the tester and measure the relief valve opening
pressure.
NOTICE:
The following pump speed is for the first pump only (in or-
der to close the vacuum valve). After the first pump, the
pump speed can be reduced.
Pump speed: 1 push within 1 second
Standard opening pressure:
93 to 122 kPa (0.95 to 1.25 kgf/cm
2, 13.4 to 17.6 psi)
Minimum opening pressure:
78 kPa (0.8 kgf/cm
2, 11.4 psi)
If the opening pressure is less than minimum, replace the re-
serve tank cap.
HINT:
Use the tester's maximum reading as the opening pressure.
3. INSPECT WATER PUMP ASSY
(a) Visually check the drain hole for coolant leakage.
If leakage is found, replace the water pump.
(b) Turn the pulley, and check that the water pump bearing
moves smoothly and does not make noise.
If necessary, replace the water pump.

160N6±01
A78434
Radiator Cap Tester
± COOLINGCOOLING SYSTEM (1CD±FTV)
16±37
AVENSIS REPAIR MANUAL (RM1018E)
COOLING SYSTEM (1CD±FTV)
ON±VEHICLE INSPECTION
1. INSPECT COOLING SYSTEM FOR LEAKS
CAUTION:
To avoid the danger of being burned, do not remove the ra-
diator cap while the engine and radiator are still hot. Ther-
mal expansion will cause hot engine coolant and steam to
blow out from the radiator.
(a) Remove the radiator support opening cover.
(b) Remove the engine room cover side.
(c) Fill the radiator with coolant and attach a radiator cap tes-
ter.
(d) Warm up the engine.
(e) Pump it to 137 kPa (1.4 kgf/cm
2, 19.9 psi), and check that
the pressure does not drop.
If the pressure drops, check the hoses, radiator and water
pump for leaks. If there are no signs or traces of external coolant
leaks, check the heater core, cylinder block and head.
(f) Reinstall the engine room cover side.
(g) Reinstall the radiator support opening cover.
2. CHECK ENGINE COOLANT LEVEL AT RESERVOIR
(a) The engine coolant should be between the ºLOWº and ºFULLº lines, when the engine is cold.
If low, check for leaks and add ºToyota Long Life Coolantº or equivalent up to the ºFULLº line.
3. CHECK ENGINE COOLANT QUALITY
(a) Remove the radiator cap.
CAUTION:
To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator
are still hot. Thermal expansion will cause hot engine coolant and steam to blow out from the radiator.
(b) Check if there is any excessive deposits of rust or scale around the radiator cap and radiator filler hole;
the coolant should be free from oil.
If excessively dirty, replace the coolant.
(c) Reinstall the radiator cap.

A73603
16±38
± COOLINGCOOLING SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
4. INSPECT FINS BLOCKAGE
(a) If fins are clogged, wash them with water or a steam
cleaner and dry with compressed air.
NOTICE:

If the distance between the steam cleaner and the
core is too close, there is a possibility of damaging
the fins, so keep the following injection distance.
Injection Pressures
kPa (kgf/cm2, psi)
Injection Distance
mm (in.)
2,942 to 4,903
(30 to 50, 427 to 711)300 (11.811)
4,903 to 7,845
(50 to 80, 711 to 1,138)500 (19.685)

If the fins are bent, straighten them with a screwdriver
or pliers.

Be careful not pour water directly onto electronic
components.

160MS±01
16±36
±
COOLING RADIATOR ASSY(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
RADIATOR ASSY(1AZ±FSE)
REPLACEMENT
1.DRAIN COOLANT (See page 16±31)
2.REMOVE RADIATOR SUPPORT OPENING COVER
3.REMOVE ENGINE ROOM COVER SIDE
4.REMOVE ENGINE UNDER COVER RH
5.DISCONNECT RADIATOR HOSE INLET
6.DISCONNECT RADIATOR HOSE OUTLET
7.REMOVE RADIATOR SUPPORT UPPER
(a)Disconnect the fan w/ motor wire harness, connector and the horn connect\
or.
(b)Remove 4 bolts, the nut and the radiator support.
8.REMOVE RADIATOR ASSY
(a)Remove 2 upper support, and radiator assembly
9.REMOVE RADIATOR SUPPORT LOWER
10.REMOVE FAN ASSY W/MOTOR
(a)Remove 6 bolts and fan w/motor.
11.INSTALL FAN ASSY W/MOTOR
12.INSTALL RADIATOR SUPPORT LOWER
13.INSTALL RADIATOR ASSY
14.INSTALL RADIATOR SUPPORT UPPER
(a)Install radiator support with 2 bolts. Torque: 19 N
m (194 kgf
cm,14 ft
lbf)
15.ADD COOLANT (See page 16±31)
16.INSPECT CHECK FOR ENGINE COOLANT LEAKS (See page 16±25)