Subaru Legacy 2002 Service Manual page 2730

15. General Diagnostic Table
A: INSPECTION
Symptom
Poor braking Long braking
effectiveness distance
Wheel locks
Brake dragging
Long brake
pedal stroke
Vehicle pitching
Unstable or
uneven braking
GENERAL DIAGNOSTIC TABLE
S005257A10
Primary probable cause
VDCH/U
VDCCM
Brake pads
Air in brake line
Tire specifications, wear and pressures
Incorrect wiring or piping
VDCH/U
VDCCM
Faulty ABS sensor or sensor gap
Incorrect wiring or piping
VDCH/U
VDCCM
Faulty ABS sensor or sensor gap
Master cylinder
Brake caliper
Parking brake
Axle & wheels
Brake pedal play
Air in brake line
Brake pedal play
VDCH/U
VDCCM
Uneven road
Suspension play or fatigue (reduced
damping)
Incorrect wiring or piping
VDCH/U
VDCCM
Faulty ABS sensor or sensor gap
Brake caliper
Brake pads
Uneven road
Tire specifications, wear and pressures
Incorrect wiring or piping
S005257
Faulty ABS sensor or sensor gap
Faulty steering angle sensor or improper neu-
tral position
Faulty yaw rate and lateral G sensor or
improper installation
Proportioning valve
Master cylinder
Brake caliper
Disc rotor
Brake pipe
Brake booster
Faulty steering angle sensor or improper neu-
tral position
Faulty yaw rate and lateral G sensor or
improper installation
Proportioning valve
Brake caliper
Brake pipe
Faulty steering angle sensor or improper neu-
tral position
Faulty yaw rate and lateral G sensor or
improper installation
Brake pads
Brake pipe
VDCH/U
Proportioning valve
Master cylinder
Brake caliper
Brake pads
Brake pipe
Brake booster
Faulty ABS sensor or sensor gap
Faulty steering angle sensor or improper neu-
tral position
Faulty yaw rate and lateral G sensor or
improper installation
Faulty ABS sensor or sensor gap
Faulty steering angle sensor or improper neu-
tral position
Faulty yaw rate and lateral G sensor or
improper installation
Master cylinder
Disc rotor
Brake pipe
Axle & wheels
Crowned road or banked road
Suspension play or fatigue (reduced damping)
VDC-271
VDC (Diagnostics)
Secondary probable cause