Subaru Legacy 2002 Service Manual page 2496

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
No.
1 CHECK IF OTHER WARNING LIGHTS
TURN ON.
Turn ignition switch to ON (engine OFF).
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.
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 con-
nector.
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 (−):
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 con-
nector.
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 (−):
5 CHECK POOR CONTACT IN CONNEC-
TORS.
Turn ignition switch to OFF.
6 CHECK WARNING AND INDICATOR
LIGHTS.
1) Connect connector to VDCCM.
2) Turn ignition switch to ON.
Step
Do other warning lights turn
on?
Is light bulb OK?
Is voltage less than 3 V?
Is voltage between 10 and
15 V?
Is there poor contact in
connectors between combi-
nation meter and VDCCM?
Do ABS warning light, VDC
warning light, VDC operat-
ing indicator light and VDC
OFF indicator light turn on?
VDC-37
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Repair connector.
A temporary poor
contact.
VDC (Diagnostics)
No
Repair combina-
tion meter. <Ref.
to IDI-15, Combi-
nation Meter
Assembly.>
Replace faulty
light bulb. <Ref. to
IDI-16,
DISASSEMBLY,
Combination
Meter Assembly.>
Repair light har-
ness.
Repair wiring har-
ness.
Go to step 6.
Replace VDCCM.
<Ref. to VDC-9,
VDC Control Mod-
ule (VDCCM).>