160ZT--01
A98676
A98677
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COOLING
COOLING FAN SYSTEM (1ND--TV)
16--5
COROLLA Supplement (RM1129E)
COOLING FAN SYSTEM (1ND--TV)
ON--VEHICLE INSPECTION
HINT:
If is normal for the cooling fan sometimes to rotate when the engine switch is turned ON (IG).
1.
CHECK COOLING FAN OPERATION AT LOW TEM-
PERATURE (Below 94
_
C (201
_
F))
(a)
Turn the engine switch ON (START) with the A/C switch
OFF.
(b)
Check that the cooling fan stops.
If not, check the cooling fan relays and engine coolant tempera-
ture sensor, then check for disconnection of the connector or
wire break between the cooling fan relay and engine coolant
temperature sensor.
(c)
Disconnect the engine coolant temperature sensor con-
nector.
(d)
Check that the cooling fan rotates.
If not, check the fuses, cooling fan relays, ECM and cooling fan,
then check for a short circuit between the cooling fan relay and
engine coolant temperature sensor.
(e)
Reconnect the engine coolant temperature sensor con-
nector.
2.
CHECK COOLING FAN OPERATION AT HIGH TEM-
PERATURES (Above 96
_
C (205
_
F))
(a)
Start the engine, then raise the coolant temperature to
above 96
_
C (205
_
F).
HINT:
Coolant temperature is the value detected by the engine cool-
ant temperature sensor on the cylinder head.
(b)
Check that the A/C switch is OFF.
(c)
Check that the cooling fan rotates.
If not, replace the engine coolant temperature sensor.
3.
INSPECT FAN
(a)
Disconnect the fan connector.
(b)
Connect the battery and ammeter to the fan connector.
(c)
Check that the fan rotates smoothly, then check the read-
ing on the ammeter.
Standard amperage: 11.7 to 14.7 A
If the amperage is not as specified, replace the cooling fan mo-
tor.
(d)
Reconnect the fan connector.
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E