Adjust the engine idle speed periodically on the engine at normal operating temperature.
To adjust the idle speed:

Engine oil and filter change
Throtile cable playOil cooler / oil cooler hose inspection and
cleaning
Refer to “exterior parts removal and installation” in section 9d .
Oil cooler hose inspection
Inspect the oil cooler hoses for any damage and oil
leakage. If any defects are found, replace the oil cooler
hose with a new one.
Oil cooler inspection
Remove the oil cooler guard (1).
...
Gearshift shaft / gearshift cam plate removal
and installation
Removal
Remove the engine sprocket cover. Refer to “engine sprocket removal and
installation” in section 3a .
Remove the clutch components. Refer to “clutch removal” in section 5c .
Remove the snap ring (1) and washer (2) from the
gearshift shaft.
Special tool
: 09900–06 ...
Iat sensor inspection
Refer to “dtc “c21” (p0110-h/l): iat sensor circuit malfunction” in section
1a .
Inspect the iat sensor.
Note
iat sensor resistance measurement method
is the same way as that of the ect sensor.
Refer to “ect sensor inspection” (page 1c-
4).
Caution
& ...