Subaru Legacy 2003 Service Manual page 909

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
1 CHECK HARNESS BETWEEN ECM AND
TCM CONNECTOR.
1) Disconnect connectors from ECM and
TCM.
2) Measure resistance of harness between
ECM and chassis ground.
Connector & terminal
(B135) No. 17 — Chassis ground:
Is the measured value less than the speci-
fied value?
2 CHECK HARNESS BETWEEN ECM AND
TCM CONNECTOR.
Measure resistance of harness between ECM
and chassis ground.
Connector & terminal
(B135) No. 16 — Chassis ground:
Is the measured value less than the specified
value?
Step
EN(H4SOw/oOBD)-90
Value
10 Ω
10 Ω
Yes
Repair ground Go to step 2.
short circuit in har-
ness between
ECM and TCM
connector.
Repair ground Replace TCM.
short circuit in har- <Ref. to AT-76,
ness between Transmission Con-
ECM and TCM trol Module
connector. (TCM).>
No