Inspect the fan relay in the following procedures:

If there is no continuity, replace it with a new one.
Special tool
: 09900–25008 (multi circuit tester
set)
Tester knob indication set
continuity test (
)

Ect sensor removal and installation
Refer to “ect sensor removal and installation” in section 1c .
Ect sensor inspection
Refer to “ect sensor inspection” in section 1c .
Cooling fan inspection
Thermostat removal and installationPrecautions
Precautions for engine cooling system
You can be injured by boiling fluid or steam if you open the
radiator cap when the engine is hot.
After the engine cools, wrap a thick cloth around cap and carefully
remove the cap by turning it a
quarter turn to allow pr ...
DTC “c40” (p0505 / p0506 / p0507): isc
valve circuit malfunction
Detected condition and possible cause
Detected condition
Possible cause
C40/P0505
The circuit voltage of motor drive is
unusual.
Isc valve circuit open or shorted to ground.
Air passage clogged.
Isc valve is fixed.
Isc valve prese ...
Engine coolant temperature indicator light inspection
Inspect the engine coolant temperature meter and indicator light (led) in the
following procedures:
remove the left side cowling. Refer to “exterior parts removal and
installation” in section 9d .
Disconnect the ect sensor coupler (1).
Connect a variable resistor (2) ...