Subaru LEGACY 2006 Manual page 4155

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13.General Diagnostic Table
A: INSPECTION
Symptom
Poor brake perfor- Long braking/stop-
mance ping distance
Wheel lock
Brake drag
Long brake pedal
stroke
Vehicle vertical
pitching
Poor brake perfor- Unstable or uneven
mance braking
General Diagnostic Table
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Main probable cause
• VDCCM&H/U
• Brake pad
• Aeration to brake line
• Tire specifications, tire wear and air pressures
• Incorrect wiring or piping connections
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor
gap
• Incorrect wiring or piping connections
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor
gap
• Master cylinder
• Brake caliper
• Parking brake
• Axle and wheels
• Brake pedal play
• Aeration to brake line
• Brake pedal play
• VDCCM&H/U
• Road surface (uneven)
• Suspension play or fatigue (reduced damping)
• Incorrect wiring or piping connections
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor
gap
• Brake caliper
• Brake pad
• Road surface (uneven)
• Tire specifications, tire wear and air pressures
• Incorrect wiring or piping connections
VDC(diag)-115
Other probable cause
• Defective ABS wheel speed
sensor or sensor gap
• Defective steering angle sen-
sor or improper neutral position
• Defective yaw rate & lateral G
sensor or improper installation
• Master cylinder
• Brake caliper
• Disc rotor
• Brake pipe
• Brake booster
• Defective steering angle sen-
sor or improper neutral position
• Defective yaw rate & lateral G
sensor or improper installation
• Brake caliper
• Brake pipe
• Defective steering angle sen-
sor or improper neutral position
• Defective yaw rate & lateral G
sensor or improper installation
• Brake pad
• Brake pipe
• VDCCM&H/U
• Master cylinder
• Brake caliper
• Brake pad
• Brake pipe
• Brake booster
• Defective ABS wheel speed
sensor or sensor gap
• Defective steering angle sen-
sor or improper neutral position
• Defective yaw rate & lateral G
sensor or improper installation
• Defective ABS wheel speed
sensor or sensor gap
• Defective steering angle sen-
sor or improper neutral position
• Defective yaw rate & lateral G
sensor or improper installation
• Master cylinder
• Disc rotor
• Brake pipe
• Axle and wheels
• Road with crowns or banks
• Suspension play or fatigue
(poor damping)