Subaru Legacy 2002 Service Manual page 912

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
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:
2 CHECK HARNESS BETWEEN ECM AND
TCM CONNECTOR.
Measure resistance of harness between ECM
and chassis ground.
Connector & terminal
(B135) No. 16 — Chassis ground:
Step
Is the resistance less than
10 Ω?
Is there resistance less
than 10 Ω?
EN(w/oOBD)-101
Check Yes
Repair ground
short circuit in
harness between
ECM and TCM
connector.
Repair ground
short circuit in
harness between
ECM and TCM
connector.
Engine (Diagnostics)
No
Go to step 2.
Replace TCM.
<Ref. to AT-49,
Transmission
Control Module
(TCM).>