Subaru LEGACY 2006 Manual page 4157

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Symptom
Poor change-direc- Deviation to right or
tion-operation sta- left direction
bility of TCS
Vehicle spin
Steering wheel drag while driving
VDC operates while driving normally.
VDC OFF indicator light does not come on
when the VDC OFF switch is depressed.
NOTE:
When pressing VDC OFF switch for more
than 10 seconds, VDC OFF indicator light
goes off and cannot operate any more.
When turning the ignition switch from OFF
to ON, the previous status is restored.
General Diagnostic Table
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Main probable cause
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor
gap
• Defective steering angle sensor or improper
neutral position
• Defective yaw rate & lateral G sensor or
improper installation
• Brake caliper
• Brake pad
• Wheel alignment
• Road surface (uneven)
• Road with crowns or banks
• Tire specifications, tire wear and air pressures
• Incorrect wiring or piping connections
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor
gap
• Defective steering angle sensor or improper
neutral position
• Defective yaw rate & lateral G sensor or
improper installation
• Brake pad
• Tire specifications, tire wear and air pressures
• Incorrect wiring or piping connections
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor
gap
• Defective steering angle sensor or improper
neutral position
• Defective yaw rate & lateral G sensor or
improper installation
• Incorrect wiring or piping connections
• Power steering system
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor
gap
• Defective steering angle sensor or improper
neutral position
• Defective yaw rate & lateral G sensor or
improper installation
• Wheel alignment
• Road surface (uneven)
• Road with crowns or banks
• Suspension play or fatigue (poor damping)
• Tire specifications, tire wear and air pressures
• Incorrect wiring or piping connections
• Power steering system
• Harness
• Indicator light bulb
• VDC OFF switch
VDC(diag)-117
Other probable cause
• Disc rotor
• Brake pipe
• Axle and wheels
• Suspension play or fatigue
(poor damping)
• Brake caliper
• Brake pipe
• Brake caliper
• Brake pad
• Disc rotor
• Wheel alignment
• Road surface (uneven)
• Road with crowns or banks
• Suspension play or fatigue
(poor damping)
• Tire specifications, tire wear
and air pressures