Pontiac Fiero 1988 Service Manual page 224

BRAKES 5-3
BRAKE DIAGNOSIS CHART — 4 WHEEL DISC SYSTEMS
2
O
Q .
s
>
m
CAUSE
Leaking Brake Line or Connection X XX X X XX
Leaking Piston Seal X XX X X X X X
Leaking Master Cylinder X XX X X X
Air in Brake System XX X X XX
Contaminated or Improper
Brake Fluid
X X X X X X X
Leaking Vacuum System XX X
Restricted Air Passage in Power Head X X XX X
Damaged Power Head X
X
X X XX
Worn Out Brake Lining X X X X X X X X
Uneven Brake Lining Wear-Replace X X X X X X XX X X
Glazed Brake Lining XX X X X X X
Incorrect Lining Material-Replace X X X X X X
X
Contaminated Brake Lining-Replace XX X XX XX X X
/ \
X
Linings Damaged by Abusive Use-
Replace
X XX X X X X
X X
Heat Spotted or Scored Discs X X X X
X XX X
Improper Thickness Variation
X XX
Excessive Lateral Run-out
X X
Automatic Adjuster Problem
X X X X
X
Brake Assembly Attachments-
Missing or Loose
X
X X
X X X X X
Restricted Brake Fluid Passage X X X X X X X X
Improperly Adjusted Stoplamp Switch
Or Cruise Control Vacuum Dump
X
Brake Pedal Linkage Interference
or Binding
X X XX XX
Improperly Adjusted Parking Brake
X X
Improper Length Booster
Pushrod
X X
X XX X
Incorrect Front End Alignment XX
Incorrect Tire Pressure X X
Incorrect Wheel Bearing Adjustment X X X
Loose Front Suspension Attachments X X XX X X
Out-of-Balance Wheel Assemblies XX
Operator Riding Brake Pedal X X X X
Sticking Caliper or Caliper
Pistons
X X XX X X
Park Brake Switch Circuit Grounded XX
Park Brake Not Releasing X X
XX
XX — Indicates more probable cause(s)
X — Indicates other causes
J 1 0 0 0 2 - 5 - P
Figure 2
Brake Diagnosis (Chart)