coolant temperature TOYOTA AVENSIS 2003 Service Owner's Manual
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 2003, Model line: AVENSIS, Model: TOYOTA AVENSIS 2003Pages: 2234, PDF Size: 56.95 MB
Page 855 of 2234
1600R±13
±
COOLING COOLING FAN SYSTEM (1AZ±FE)
16±17
AVENSIS REPAIR MANUAL (RM1018E)
COOLING FAN SYSTEM (1AZ±FE)
ON±VEHICLE INSPECTION
HINT:
It is normal that the cooling fan sometime rotates when the ignition switc\
h is turned from ACC to ON.
1. CHECK COOLING FAN OPERATION WITH LOW TEMPERATURE (Below 77 C (171F))
(a) Turn the ignition switch ON.
(b) Check that the cooling fan stops.
If not, check the cooling fan relay and engine coolant temperature sensor, and check for disconnection of
connectors or wire break between the cooling fan relay and engine coolan\
t temperature sensor.
(c) Disconnect the engine coolant temperature sensor connector.
(d) Check that the cooling fan rotates.
If not, check the fuses, cooling fan relay, ECM and cooling fan, and check for a short circuit between the
cooling fan relay and engine coolant temperature sensor.
(e) Reconnect the engine coolant temperature sensor connector.
2. CHECK COOLING FAN OPERATION WITH HIGH TEMPERATURE (Above 95.5 C (204 F))
(a) Start the engine, and raise coolant temperature to above 95.5 C (204 F).
HINT:
Coolant temperature is the detected value by the engine coolant temperat\
ure sensor on the water outlet.
(b) Check that the cooling fan rotates.
If not, replace the engine coolant temperature sensor.
3. INSPECT COOLING FAN
(a) Disconnect the cooling fan connector.
(b) Connect battery and ammeter to the cooling fan connector.
(c) Check that the cooling fan rotates smoothly, and check the reading on the ammeter. Standard amperage:
5.2 to 8.2 A at 20 C (68F) (M/T)
8.3 to 11.3 A at 20 C (68 F) (A/T)
(d) Reconnect the cooling fan connector.
4. INSPECT COOLING FAN No.2 (With Air Conditioner)
(a) Disconnect the cooling fan connector.
(b) Connect battery and ammeter to the cooling fan connector.
(c) Check that the cooling fan rotates smoothly, and check the reading on the ammeter. Standard amperage:
5.2 to 8.2 A at 20 C (68F) (M/T)
8.3 to 11.3 A at 20 C (68 F) (A/T)
(d) Reconnect the cooling fan connector.
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Page 857 of 2234
1600R±12
±
COOLING COOLING FAN SYSTEM (1AZ±FSE)
16±29
AVENSIS REPAIR MANUAL (RM1018E)
COOLING FAN SYSTEM (1AZ±FSE)
ON±VEHICLE INSPECTION
HINT:
It is normal that the cooling fan sometime rotates when the ignition switc\
h is turned from ACC to ON.
1. CHECK COOLING FAN OPERATION WITH LOW TEMPERATURE (Below 83 C (181F))
(a) Turn the ignition switch ON.
(b) Check that the cooling fan stops.
If not, check the cooling fan relay and engine coolant temperature sensor, and check for disconnection of
connectors or wire break between the cooling fan relay and engine coolan\
t temperature sensor.
(c) Disconnect the engine coolant temperature sensor connector.
(d) Check that the cooling fan rotates.
If not, check the fuses, cooling fan relay, ECM and cooling fan, and check for a short circuit between the
cooling fan relay and engine coolant temperature sensor.
(e) Reconnect the engine coolant temperature sensor connector.
2. CHECK COOLING FAN OPERATION WITH HIGH TEMPERATURE (Above 100 C (212 F))
(a) Start the engine, and raise coolant temperature to above 100 C (212 F).
HINT:
Coolant temperature is the detected value by the engine coolant temperat\
ure sensor on the water outlet.
(b) Check that the cooling fan rotates.
If not, replace the engine coolant temperature sensor.
3. INSPECT COOLING FAN
(a) Disconnect the cooling fan connector.
(b) Connect battery and ammeter to the cooling fan connector.
(c) Check that the cooling fan rotates smoothly, and check the reading on the ammeter. Standard amperage:
5.2 to 8.2 A at 20 C (68F) (M/T)
8.3 to 11.3 A at 20 C (68 F) (A/T)
(d) Reconnect the cooling fan connector.
4. INSPECT COOLING FAN No.2 (With Air Conditioner)
(a) Disconnect the cooling fan connector.
(b) Connect battery and ammeter to the cooling fan connector.
(c) Check that the cooling fan rotates smoothly, and check the reading on the ammeter. Standard amperage:
5.2 to 8.2 A at 20 C (68F) (M/T)
8.3 to 11.3 A at 20 C (68 F) (A/T)
(d) Reconnect the cooling fan connector.
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Page 859 of 2234
1606N±03
A57065
21
±
COOLING COOLING 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 swit\
ch 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.
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Page 861 of 2234
P05962
Ohmmeter
±
COOLING COOLING 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 (199F).
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
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Page 862 of 2234
1600R±14
±
COOLING COOLING FAN SYSTEM (1ZZ±FE/3ZZ±FE)
16±5
AVENSIS REPAIR MANUAL (RM1018E)
COOLING FAN SYSTEM (1ZZ±FE/3ZZ±FE)
ON±VEHICLE INSPECTION
HINT:
It is normal that the cooling fan sometime rotates when the ignition switc\
h is turned from ACC to ON.
1. CHECK COOLING FAN OPERATION WITH LOW TEMPERATURE (Below 94.5 C (202 F))
(a) Turn the ignition switch ON.
(b) Check that the cooling fan stops.
If not, check the cooling fan relay and engine coolant temperature sensor, and check if there is its connector
disconnection or circuit open between them.
(c) Disconnect the engine coolant temperature sensor connector.
(d) Check that the cooling fan rotates.
If not, check the fuses, cooling fan relay, ECM and cooling fan, and check for short in a circuit between the
cooling fan relay and the engine coolant temperature sensor.
(e) Reconnect the engine coolant temperature sensor connector.
2. CHECK COOLING FAN OPERATION WITH HIGH TEMPERATURE (Above 96 C (205 F))
(a) Start the engine, and raise coolant temperature to above 96 C (205 F).
HINT:
Coolant temperature is detected by the engine coolant temperature sensor\
on the water outlet.
(b) Check that the cooling fan rotates.
If not, replace the engine coolant temperature sensor.
3. INSPECT COOLING FAN
(a) Disconnect the cooling fan connector.
(b) Connect battery and ammeter to the connector.
(c) Check that the cooling fan rotates smoothly, and check the reading on the ammeter. Standard amperage: Approximately. 8 to 12 A at 20 C (68 F)
(d) Reconnect the cooling fan connector.
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Page 868 of 2234
160N2±01
P13560
P00436
10mm
A51911
±
COOLING COOLING SYSTEM (1AZ±FE)
16±15
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 84 C (176 to 183 F)
If the valve opening temperature is not as specified, replace the
thermostat.
(c) Check the valve lift. Valve lift: 10 mm (0.394 in.) or more at 95 C (203 F)
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 77 C (171 F)).
If not closed, replace the thermostat.
2. INSPECT RADIATOR 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.
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Page 872 of 2234
160MZ±01
P35001
P00436
10mm
A51911
±
COOLING COOLING SYSTEM (1AZ±FSE)
16±27
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 an gradually heat the
water.
(b) Check the valve opening temperature of the thermostat. Valve opening temperature:
86 to 90 C (187 to 198 F)
If the valve opening temperature is not as specified, replace the
thermostat.
(c) Check the valve lift. Valve lift: 10 mm (0.394 in.) or more at 100 C (212 F)
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 83 C (181 F)).
If not closed, replace the thermostat.
2. INSPECT RADIATOR 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.
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Page 876 of 2234
160N7±01
B08008
CO0929
B08007
8.5mm
±
COOLING COOLING 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 84 C (176 to 183 F)
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 95 C (203 F)
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 77 C (171 F)).
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.
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Page 880 of 2234
160N5±01
P13560
P00436
P24125
10mm
±
COOLING COOLING SYSTEM (1ZZ±FE/3ZZ±FE)
16±3
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION
1. INSPECT THERMOSTAT
HINT:
The valve opening temperature is inscribed on the thermostat.
(a) Immerse the thermostat in water and gradually heat the
water.
(b) Check the valve opening temperature. Valve opening temperature:
80 to 84 C (176 to 183 F)
If the valve opening temperature is not as specified, replace the
thermostat.
(c) Check the valve lift. Valve lift: 10 mm (0.39 in.) or more at 95 C (203 F)
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 77 C (171 F)).
If not closed, replace the thermostat.
2. INSPECT RADIATOR 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.
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Page 889 of 2234
16±8
±
COOLINGENGINE COOLANT(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
(d)Warm up the engine until the thermostat valve begins to open.
HINT:
Press the radiator inlet and outlet hose several times by hand during th\
e warming up.
(e)Stop the engine and wait until the coolant temperature gets cold. Then remov\
e the radiator cap to check the coolant level.
If the level gets lower, perform the procedures from (a) through (e) again.
If the level does not gets lower, fill the reservoir tank with engine coolant.
3.CHECK FOR ENGINE COOLANT LEAKS (See page 16±1)
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