Subaru LEGACY 2003 Service Manual page 217

DIAGNOSTICS CHART WITH SELECT MONITOR
Step
1 CHECK CONTACT POINT OF MOTOR RE-
LAY.
1) Turn ignition switch to OFF.
2) Remove motor relay from relay box.
3) Measure resistance between motor relay
terminals.
Terminals
No. 30 — No. 87:
Does the measured value exceed the spec-
ified value?
2 CHECK SHORT OF MOTOR RELAY.
Measure resistance between motor relay ter-
minals.
Terminals
No. 85 — No. 30:
No. 85 — No. 87:
Does the measured value exceed the specified
value?
3 CHECK GROUND SHORT IN CIRCUIT OF
RELAY BOX.
1) Disconnect connector (F90) from relay box.
2) Measure resistance between relay box con-
nector unit and chassis ground.
Connector & terminal
(VDC4) No. 4 — Chassis ground:
Does the measured value exceed the spec-
ified value?
4 CHECK BATTERY SHORT IN CIRCUIT OF
RELAY BOX.
Measure voltage between relay box connector
and chassis ground.
Connector & terminal
(VDC4) No. 6 (+) — Chassis ground ( − − − − ):
Is the measured value less than the specified
value?
5 CHECK BATTERY SHORT IN CIRCUIT OF
RELAY BOX.
1) Turn ignition switch to ON.
2) Measure voltage between relay box con-
nector and chassis ground.
Connector & terminal
(VDC4) No. 6 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
6 CHECK GROUND SHORT IN HARNESS BE-
TWEEN RELAY BOX AND VDCCM.
1) Turn ignition switch to OFF.
2) Disconnect connector from VDCCM.
3) Measure resistance between VDCCM con-
nector and chassis ground.
Connector & terminal
(F87) No. 22 — Chassis ground:
Does the measured value exceed the spec-
ified value?
Value
1 MΩ
1 MΩ
1 MΩ
1 V
1 V
1 MΩ
VDC-215
VDC (DIAGNOSTICS)
Yes
Go to step 2. Replace motor
relay.
Go to step 3. Replace motor
relay.
Go to step 4. Replace relay box.
Go to step 5. Replace relay box.
Go to step 6. Replace relay box.
Go to step 7. Repair harness
between VDCCM
and relay box.
Check fuse SBF
holder.
No