Subaru LEGACY 2003 Service Manual page 212

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (DIAGNOSTICS)
7 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
(VDC4) No. 5 (+) — Chassis ground ( − − − − ):
(VDC4) No. 1 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
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 ( − − − − ):
Is the measured value less than the speci-
fied value?
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 ( − − − − ):
Is the measured value less than the speci-
fied value?
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 ( − − − − ):
Is the measured value less than the speci-
fied value?
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 ( − − − − ):
Is the measured value less than the speci-
fied value?
Step Value
1 V
1 V
1 V
1 V
1 V
VDC-210
Yes
Go to step 8. Replace relay box.
Check fuse No. 8
and SBF3.
Go to step 9. Repair harness
between VDCCM
and relay box and
check all fuses.
Go to step 10. Repair harness
between VDCCM
and relay box and
check all fuses.
Go to step 11. Replace relay box.
Go to step 12. Replace relay box.
No