Subaru Legacy 2002 Service Manual page 2668

DIAGNOSTICS CHART WITH SELECT MONITOR
No.
8 CHECK BATTERY SHORT IN CONTROL
SYSTEM HARNESS OF VALVE RELAY.
1) Turn ignition switch to OFF.
2) Disconnect connector from VDCCM.
3) Disconnect connector from VDCH/U.
4) Measure voltage between VDCCM connec-
tor and chassis ground.
Connector & terminal
(F87) No. 27 (+) — Chassis ground (−):
(F87) No. 47 (+) — Chassis ground (−):
9 CHECK BATTERY SHORT IN CONTROL
SYSTEM HARNESS OF VALVE RELAY.
1) Turn ignition switch to ON.
2) Measure voltage between VDCCM connec-
tor and chassis ground.
Connector & terminal
(F87) No. 27 (+) — Chassis ground (−):
(F87) No. 47 (+) — Chassis ground (−):
10 CHECK BATTERY SHORT IN CONTACT
POINT CIRCUIT OF RELAY BOX.
1) Disconnect connector VDC1 from relay
box.
2) Measure voltage between VDCH/U con-
nector and chassis ground.
Connector & terminal
(VDC1) No. 2 (+) — Chassis ground
(−):
11 CHECK BATTERY SHORT IN CONTACT
POINT CIRCUIT OF RELAY BOX.
1) Turn ignition switch to ON.
2) Measure voltage between VDCH/U con-
nector and chassis ground.
Connector & terminal
(VDC1) No. 2 (+) — Chassis ground
(−):
12 CHECK BATTERY SHORT OF SOLENOID
VALVE.
1) Turn ignition switch to OFF.
2) Measure voltage between VDCH/U con-
nector and chassis ground.
Connector & terminal
(VDC2) No. 2 (+) — Chassis ground
(−):
13 CHECK BATTERY SHORT OF SOLENOID
VALVE.
1) Turn ignition switch to ON.
2) Measure voltage between VDCH/U con-
nector and chassis ground.
Connector & terminal
(VDC2) No. 2 (+) — Chassis ground
(−):
Step
Is the voltage less than 1
V?
Is the voltage less than 1
V?
Is the voltage less than 1
V?
Is the voltage less than 1
V?
Is the voltage less than 1
V?
Is the voltage less than 1
V?
VDC-209
Check Yes
Go to step 9.
Go to step 10.
Go to step 11.
Go to step 12.
Go to step 13.
Go to step 14.
VDC (Diagnostics)
No
Repair harness
between VDCCM
and relay box and
check all fuses.
Repair harness
between VDCCM
and relay box and
check all fuses.
Replace relay
box.
Replace relay
box.
Replace VDCH/U
and check all
fuses. <Ref. to
VDC-11, Hydraulic
Control Unit
(H/U).>
Replace VDCH/U
and check all
fuses. <Ref. to
VDC-11, Hydraulic
Control Unit
(H/U).>