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 playRear brake pedal removal and installation
Removal
Remove the master cylinder assembly. Refer to “rear brake master
cylinder assembly removal and installation” .
Disconnect the rear brake light switch lead wire coupler. Refer to
“rear brake light switch inspection” .
Remove the rear brake pedal as shown in the rear ...
Front brake master cylinder assembly removal and installation
Removal
Drain brake fluid. Refer to “brake fluid replacement” .
Disconnect the front brake light switch coupler (1).
Place a rag underneath the brake hose union bolt (2)
on the master cylinder to catch any spilt brake fluid.
Remove the brake hose union bolt (2).
...
Front brake light switch inspection
Inspect the front brake light switch in the following
procedures:
disconnect the front brake light switch coupler (1).
Inspect the front brake light switch for continuity with
the tester.
If any abnormality is found, replace the front brake light switch with a new
one. Re ...