Subaru LEGACY 2006 Manual page 4156

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VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Symptom
Vibration or noise Excessive brake
• When braking pedal vibration
suddenly
• When accelerat-
ing suddenly
Noise from VDCH/U
• While driving on
a slippery road
Noise from the front
side of vehicle
Noise inside pas-
senger seat
Noise from the rear
side of vehicle
Engine does not accelerate or goes into a
stall when accelerating suddenly or driving
on a slippery surface.
General Diagnostic Table
Main probable cause
• Road surface (uneven)
• Incorrect wiring or piping connections
• VDCCM&H/U (mount bushing)
• Defective ABS wheel speed sensor or sensor
gap
• Brake pipe
• VDCCM&H/U (mount bushing)
• Defective ABS wheel speed sensor or sensor
gap
• Master cylinder
• Brake caliper
• Brake pad
• Disc rotor
• Brake pipe
• Brake booster
• Suspension play or fatigue (poor damping)
• Defective ABS wheel speed sensor or sensor
gap
• Brake caliper
• Brake pad
• Disc rotor
• Parking brake
• Brake pipe
• Suspension play or fatigue (poor damping)
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor
gap
• Master cylinder
• Brake caliper
• Parking brake
• Incorrect wiring or piping
VDC(diag)-116
Other probable cause
• VDCCM&H/U
• Brake booster
• Suspension play or fatigue
(poor damping)
• VDCCM&H/U
• Defective steering angle sen-
sor or improper neutral position
• Defective yaw rate & lateral G
sensor or improper installation
• Axle and wheels
• Tire specifications, tire wear
and air pressures
• VDCCM&H/U
• Defective steering angle sen-
sor or improper neutral position
• Defective yaw rate & lateral G
sensor or improper installation
• Axle and wheels
• Tire specifications, tire wear
and air pressures
• Defective steering angle sen-
sor or improper neutral position
• Defective yaw rate & lateral G
sensor or improper installation
• Brake pad
• Brake pipe