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 playExcva removal and installation
Removal
Turn the ignition switch off.
Remove the left side cowling. Refer to “exterior parts removal and
installation” in section 9d .
Connect the special tool (mode select switch) to the dealer mode
coupler. Refer to “self-diagnostic procedures” in section 1a .
After tur ...
Oil pump inspection
Inspect the oil pump in the following procedures:
remove the oil pump. Refer to “oil pump removal and installation” .
Rotate the oil pump by hand and check that it moves
smoothly. If it does not move smoothly, replace the
oil pump assembly.
Caution
do not attempt t ...
Isc valve preset and opening initialization
When removing or replacing the isc valve, set the isc
valve to the following procedures:
turn the ignition switch on.
Set up the sds tool. (Refer to the sds operation
manual for further details.)
Click the “active control”.
Click the “isc learned value reset” (1) ...