Subaru LEGACY 2003 Service Manual page 38

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
VDC (DIAGNOSTICS)
1 CHECK IF OTHER WARNING LIGHTS TURN
ON.
Turn ignition switch to ON (engine OFF).
Do other warning lights turn on?
2 CHECK LIGHT BULB.
1) Turn ignition switch to OFF.
2) Remove combination meter.
3) Remove ABS warning light bulb, VDC
warning light bulb, VDC operating indicator
light bulb or VDC OFF indicator light bulb
from combination meter.
Is light bulb OK?
3 CHECK BATTERY SHORT OF LIGHT HAR-
NESS.
1) Disconnect VDCCM connector from
VDCCM.
2) Place a sheet of thick paper [thickness 1.5
mm (0.059 in)] in switch area of VDCCM
connector.
3) Turn ignition switch to ON.
4) Measure voltage between VDC connector
and chassis ground.
Connector & terminal
ABS warning light
(F87) No. 54 (+) — Chassis ground ( − − − − ):
VDC warning light
(F87) No. 53 (+) — Chassis ground ( − − − − ):
VDC operating indicator light
(F87) No. 32 (+) — Chassis ground ( − − − − ):
VDC OFF indicator light
(F87) No. 52 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
4 CHECK WIRING HARNESS.
1) Turn ignition switch to OFF.
2) Install ABS warning light bulb from combi-
nation meter.
3) Install combination meter.
4) Place a sheet of thick paper [thickness 1.5
mm (0.059 in)] in switch area of VDCCM
connector.
5) Turn ignition switch to ON.
6) Measure voltage between VDCCM connec-
tor and chassis ground.
Connector & terminal
ABS warning light
(F87) No. 54 (+) — Chassis ground ( − − − − ):
VDC warning light
(F87) No. 53 (+) — Chassis ground ( − − − − ):
VDC operating indicator light
(F87) No. 32 (+) — Chassis ground ( − − − − ):
VDC OFF indicator light
(F87) No. 52 (+) — Chassis ground ( − − − − ):
Is the measured value within the specified
range?
5 CHECK POOR CONTACT IN CONNECTORS.
Turn ignition switch to OFF.
Is there poor contact in connectors between
combination meter and VDCCM?
Step Value
Warning lights turn on.
OK.
3 V
10 — 15 V
There is poor contact.
VDC-36
Yes
Go to step 2. Repair combina-
tion meter. <Ref.
to IDI-14, Combi-
nation Meter
Assembly.>
Go to step 3. Replace faulty
light bulb. <Ref. to
IDI-15, DISAS-
SEMBLY, Combi-
nation Meter
Assembly.>
Go to step 4. Repair light har-
ness.
Go to step 5. Repair wiring har-
ness.
Repair connector. Go to step 6.
No