Subaru Legacy 2004 Service Manual page 3208

Symptom
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
Main probable cause
• Harness
• Indicator light bulb
• VDC OFF switch
VDC(diag)-135
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Other probable cause