Check the play of the release bearing by spinning it by hand. If there is excessive play or noise, replace the release bearing.

NOTE: The release bearing is packed with grease. Do not wash it in solvent.
Brake Assist System
■Brake Assist System
Designed to assist the driver by generating greater braking force when you
depress
the brake pedal hard during emergency braking.
■ Brake assist system operatio ...
Fluid Locations
...
Removal
Do the battery terminal disconnection procedure.
Remove the drive belt.
Remove the intake manifold.
Disconnect the alternator connector (A) and the p ...