Subaru LEGACY 2003 Service Manual page 73

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
Step
1 CHECK RESISTANCE OF SOLENOID
VALVE.
1) Turn ignition switch to OFF.
2) Disconnect two connectors (VDC1, F91)
from VDCH/U.
3) Measure resistance between VDCH/U con-
nector terminals.
Connector & terminal
DTC 32/(VDC5) No. 1 — (VDC2) No. 2:
DTC 34/(VDC5) No. 4 — (VDC2) No. 2:
DTC 36/(VDC5) No. 3 — (VDC2) No. 2:
DTC 38/(VDC5) No. 2 — (VDC2) No. 2:
DTC 63/(VDC5) No. 10 — (VDC2) No. 2:
DTC 64/(VDC5) No. 11 — (VDC2) No. 2:
Is the measured value within the specified
range?
2 CHECK GROUND SHORT OF SOLENOID
VALVE.
Measure resistance between VDCH/U connec-
tor and chassis ground.
Connector & terminal
DTC 32/(VDC5) No. 1 — Chassis
ground:
DTC 34/(VDC5) No. 4 — Chassis
ground:
DTC 36/(VDC5) No. 3 — Chassis
ground:
DTC 38/(VDC5) No. 2 — Chassis
ground:
DTC 63/(VDC5) No. 10 — Chassis
ground:
DTC 64/(VDC5) No. 11 — Chassis
ground:
Does the measured value exceed the specified
value?
3 CHECK BATTERY SHORT OF SOLENOID
VALVE.
1) Disconnect connector from VDCCM.
2) Measure voltage between VDCH/U con-
nector and chassis ground.
Connector & terminal
DTC 32/(VDC5) No. 1 (+) — Chassis
ground ( − − − − ):
DTC 34/(VDC5) No. 4 (+) — Chassis
ground ( − − − − ):
DTC 36/(VDC5) No. 3 (+) — Chassis
ground ( − − − − ):
DTC 38/(VDC5) No. 2 (+) — Chassis
ground ( − − − − ):
DTC 63/(VDC5) No. 10 (+) — Chassis
ground ( − − − − ):
DTC 64/(VDC5) No. 11 (+) — Chassis
ground ( − − − − ):
Is the measured value less than the speci-
fied value?
Value
3.8 — 4.8 Ω
1 MΩ
1 V
VDC-71
VDC (DIAGNOSTICS)
Yes
Go to step 2. Replace VDCH/U.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
Go to step 3. Replace VDCH/U.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
Go to step 4. Replace VDCH/U.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
No