On-Vehicle Inspection - Toyota 1C Repair Manual

COOLI NG SYSTEM - Bectric Cooling Fan
C0-13
ON-VEHICLE INSPECTION
Low Temperature [below 83 °C or 181 °F]
1 . TURN STARTER SWITCH ON
Confirm that the fan stops.
If it does not, check the fan relay and temperature switch.
and check for a separated connector or severed wire be-
tween th e relay and temperature switch.
.....
Above 90°C
Below B3°C
9o•c
C00090
2. DISCONNECT TEMPERATURE SWITCH CONNECTOR
Confirm that the fan turns.
If not. check the fan relay, fan motor, main relay and fuse,
and check for a short circuit between
the
fan relay and
temperature switc h.
3. CONN ECT TEMPERATURE SWITCH CONNECTOR
High Temperature [above 90 °C or 1 94 °F]
4. START ENGINE
(al Raise the engine temperature to above 90 °C (194°Fl.
lb) Confirm that the fan turns .
If not. replace the temperature switch .
INSPECTION O F ELECTRIC COOLING FAN
1. INSPECT TEMPERATURE SWITCH
LOCATION : On the radiator .
(a)
Using an ohmmeter. check that there is no continuity
when the coolant temperature is
above
90 °C
l194 °F)
(bl Check that there is continuity when the coolan t tem-
perature is below 83 °C (181 °F).
If continuity is not as specified, replace the switch .