Subaru Legacy 2004 Service Manual page 3139

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step
1 CHECK GROUND CIRCUIT FOR VDCCM&H/
U.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from VDCCM&H/
U.
3) Measure the resistance between
VDCCM&H/U and chassis ground.
Connector & terminal
(B310) No. 6 — Chassis ground:
2 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-
3 CHECK SOURCES OF SIGNAL NOISE.
4 CHECK SOURCES OF SIGNAL NOISE.
5 CHECK VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
6 CHECK OTHER DTC DETECTION.
Check
Is the resistance less than 0.5
&?
nectors between battery, igni-
tion switch and VDCCM&H/U?
Is the car phone or radio prop-
erly installed?
Are noise sources (such as an
antenna) installed near the
sensor harness?
Is the same DTC displayed?
Is any other DTC displayed?
VDC(diag)-66
Yes
Go to step 2. Repair the
VDCCM&H/U
ground harness.
Repair the con- Go to step 3.
nector.
Go to step 4. Install the car
phone or radio
properly.
Install the noise Go to step 5.
sources apart from
the sensor har-
ness.
Replace the Go to step 6.
VDCCM&H/U.
<Ref. to VDC-7,
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Perform the diag- Temporary poor
nosis according to contact occurs.
DTC. <Ref. to
VDC(diag)-37, List
of Diagnostic Trou-
ble Code (DTC).>
No