Isuzu Trooper 1999 Workshop Manual page 587

5C–8
POWER ASSISTED BRAKE SYSTEM
Condition
Poor Brake Action
Possible cause
Master cylinder faulty.
Vacuum booster faulty.
Level of brake fluid in reservoir too
low.
Air in hydraulic circuit.
Disc brake caliper faulty.
Water or oil on brake pads.
Brake pads in poor contact with the
brake disc.
Brake pads worn.
Brake disc rusted.
Check valve in vacuum hose faulty.
Correction
Correct or replace.
Correct or replace.
Replenish and bleed.
Bleed
Clean or replace.
Clean or replace.
Correct
Replace
Grind or replace.
Correct or replace.