Subaru Legacy 2002 Service Manual page 2635

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (Diagnostics)
No.
9 CHECK ECM.
1) Turn ignition switch to ON.
2) Measure voltage between ECM connector
terminal and chassis ground.
Connector & terminal
H4 ENGINE MODEL
(B135) No. 5 (+) — Chassis ground (−):
H6 ENGINE MODEL
(B134) No. 4 (+) — Chassis ground (−):
10 CHECK POOR CONTACT IN CONNEC-
TORS.
11 CHECK ENGINE.
Step
Is the voltage between 10
and 15 V?
Is there poor contact in
connector ECM?
Is the engine functioning
normally?
VDC-176
Check Yes
Repair harness/
connector
between ECM
and VDCCM.
Repair connector.
Replace ECM. H4
ENGINE MODEL
<Ref. to FU-51,
Engine Control
Module.> or <Ref.
to FU(H6)-47,
Engine Control
Module.>
No
Go to step 10.
Go to step 11.
Repair engine.