Remove the harness holder (A).

Check the PCV valve (A), the hoses (B), the pipe (C), and the connections for leaks or restrictions.

At idle, make sure there is a clicking sound from the PCV valve when the hose between the PCV valve and the intake manifold is lightly pinched (A) with your fingers or pliers.
If there is no clicking sound, check the PCV valve washer for cracks or damage. If the washer is OK, replace the PCV valve and recheck.

Driver's Seat Position Sensor Operation Check
Check the driver's seat position sensor after the driver's seat position
sensor replacement.
Make sure the driver's seat is all the way forward position.
Make sure the ...
Brake/Clutch Fluid
Specified fluid: Honda Heavy Duty Brake Fluid DOT 3
Use the same fluid for both the brakes and clutch.
NOTICE
Brake fluid marked DOT 5 is not compatible with your
vehicle’s braking system and ca ...
Mainshaft Thrust Clearance Adjustment (M/T)
Special Tools Required
Mainshaft Base 07GAJ-PG20130
Collar 07GAJ-PG20120
Mainshaft Holder 07GAJ-PG20110
Remove the 72 mm shim (A) and oil guide plate M from the transmission
housing ...