Subaru LEGACY 2003 Service Manual page 111

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
Step
1 CHECK RESISTANCE OF MOTOR RELAY.
1) Turn ignition switch to OFF.
2) Remove motor relay from relay box.
3) Measure resistance between motor relay
terminals.
Terminals
No. 85 — No. 86:
Is the measured value within the specified
range?
2 CHECK CONTACT POINT OF MOTOR RE-
LAY.
1) Connect battery to motor relay terminals
No. 85 and No. 86.
2) Measure resistance between motor relay
terminals.
Terminals
No. 30 — No. 87:
Is the measured value less than the speci-
fied value?
3 CHECK CONTACT POINT OF MOTOR RE-
LAY.
1) Disconnect battery from motor relay termi-
nals.
2) Measure resistance between motor relay
terminals.
Terminals
No. 30 — No. 87:
Does the measured value exceed the spec-
ified value?
4 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?
5 CHECK INPUT VOLTAGE OF RELAY BOX.
1) Disconnect connector (F89) from relay box.
2) Disconnect connector from VDCCM.
3) Measure voltage between relay box con-
nector and chassis ground.
Connector & terminal
(F89) No. 2 (+) — Chassis ground ( − − − − ):
Is the measured value within the specified
range?
6 CHECK INPUT VOLTAGE OF MOTOR RE-
LAY.
1) Connect connector (F89) to relay box.
2) Measure voltage between relay box and
chassis ground.
Connector & terminal
(VDC7) No. 87 (+) — Chassis ground ( − − − −
):
Is the measured value within the specified
range?
Value
70 — 90 Ω
0.5 Ω
1 MΩ
1 MΩ
10 — 15 V
10 — 15 V
VDC-109
VDC (DIAGNOSTICS)
Yes
Go to step 2. Replace motor
relay.
Go to step 3. Replace motor
relay.
Go to step 4. Replace motor
relay.
Go to step 5. Replace motor
relay.
Go to step 6. Repair harness/
connector
between battery
and relay box, and
check fuse SBF
holder.
Go to step 7. Replace relay box.
No