B00859
B13204
Disconnect
CO089-02
B00860
B00633
98
°
C
-
COOLING
ELECTRIC COOLING FAN
CO-19
1179
Author:
Date:
2001 SIENNA (RM787U)
ELECTRIC COOLING FAN
ON-VEHICLE INSPECTION
1.
CHECK COOLING FAN OPERATION WITH LOW
TEMPERATURE (Below 88
°
C (190
°
F))
(a)
Turn the ignition switch ON.
(b)
Check that the cooling fan stops.
If not, check the cooling fan relay and ECT switch, and check
for a separated connector or severed wire between the cooling
fan relay and ECT switch.
(c)
Disconnect the No.1 ECT switch connector.
(d)
Check that the cooling fan rotates.
If not, check the fuses, engine main relay, cooling fan relay,
cooling fan, and check for a short circuit between the cooling
fan relay and ECT switch.
(e)
Reconnect the No.1 ECT switch connector.
2.
CHECK COOLING FAN OPERATION WITH HIGH
TEMPERATURE (Above 98
°
C (208
°
F))
(a)
Start the engine, and raise coolant temperature to above
98
°
C (208
°
F).
(b)
Check that the cooling fan rotates.
If not, replace the No.1 ECT switch.