Subaru 2009 IMPREZA, Service Manual

Page: 2533 / 3619

VDC(diag)-71
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step Check Yes No
1 CHECK STOP LIGHT SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the stop light switch connector.
3) Measure the resistance of stop light switch
terminals.
Is the resistance 1 M
:
or more
when switch is OFF (when
pedal is not depressed)?
Go to step 2 . Replace the stop
light switch.
2 INTERVIEWING CUSTOMERS.
Make sure that the operation was performed in
which accelerator pedal and brake pedal were
depressed simultaneously (with depressing
brake pedal with left foot).
Were the acceleration pedal
and brake pedal depressed
simultaneously? System is normal.
(DTC may be
recorded while
brake is applied
during driving.) Go to step 3 .
3 CHECK VDCCM&H/U.
1) Connect all connectors.
2) Clear the memory. <Ref. to VDC(diag)-24,
Clear Memory Mode.>
3) Perform the Inspection Mode. <Ref. to
VDC(diag)-23, Inspection Mode.>
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM only.
<Ref. to VDC-9,
REPLACEMENT,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).> Go to step 4 .
4 CHECK OTHER DTC DETECTION. Is any other DTC displayed? Perform the diag-
nosis according to
DTC. <Ref. to
VDC(diag)-33, List
of Diagnostic Trou-
ble Code (DTC).> Temporary poor
contact occurs.