Subaru Legacy 2002 Service Manual page 2595

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (Diagnostics)
No.
10 CHECK INSTALLATION OF VDCCM CON-
NECTOR.
Turn ignition switch to OFF.
11 CHECK POWER SUPPLY CIRCUIT.
1) Turn ignition switch to ON (engine OFF).
2) Measure ignition power supply voltage
between VDCCM connector and chassis
ground.
Connector & terminal
(F87) No. 28 (+) — Chassis ground (−):
12 CHECK HARNESS CONNECTOR
BETWEEN VDCCM AND CHASSIS
GROUND.
1) Turn ignition switch to OFF.
2) Disconnect connector from VDCCM and
transmission.
3) Measure resistance of harness between
VDCCM and chassis ground.
Connector & terminal
(F87) No. 1 — Chassis ground:
(F87) No. 55 — Chassis ground:
13 CHECK POOR CONTACT IN CONNEC-
TORS.
Step
Is VDCCM connector
inserted into VDCCM until
the clamp locks onto it?
Is the voltage more than 10
V?
Is the resistance less than
1 Ω?
Is there poor contact in
control module power
supply, ground line and
data link connector?
VDC-136
Check Yes
Go to step 11.
Go to step 12.
Go to step 13.
Repair connector.
No
Insert VDCCM
connector into
VDCCM until the
clamp locks onto
it.
Repair open cir-
cuit in harness
between VDCCM
and battery.
Repair open cir-
cuit in harness
between VDCCM
and inhibitor side
connector, and
poor contact in
coupling connec-
tor.
Replace VDCCM.
<Ref. to VDC-11,
Hydraulic Control
Unit (H/U).>