Subaru Legacy 2003 Service Manual page 2315

DIAGNOSTIC PROCEDURE FOR SELECT MONITOR COMMUNICATION
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
7 CHECK OUTPUT SIGNAL FOR TCM.
1) Turn ignition switch to ON.
2) Measure voltage between data link connec-
tor and chassis ground.
Connector & terminal
(B40) No. 10 (+) — Chassis ground ( − − − − ):
(B40) No. 6 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
8 CHECK HARNESS/CONNECTOR BETWEEN
TCM AND DATA LINK CONNECTOR.
Measure resistance between TCM connector
and data link connector.
Connector & terminal
(B56) No. 15 — (B40) No. 10:
Is the measured value less than the specified
value?
9 CHECK HARNESS/CONNECTOR BETWEEN
TCM AND DATA LINK CONNECTOR.
Measure resistance between TCM connector
and data link connector.
Connector & terminal
(B56) No. 24 — (B40) No. 6:
Does the measured value exceed the specified
value?
10 CHECK INSTALLATION OF TCM CONNEC-
TOR.
Turn ignition switch to OFF.
Is TCM connector inserted into TCM?
11 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in control module and
data link connector?
Step Value
1 V
0.5 Ω
1 MΩ
TCM connector is inserted cor-
rectly.
There is poor contact.
AT-40
Yes
Repair harness A temporary poor
and connector contact of the con-
between each nector or harness
control module may be the cause.
and data link con- Repair harness or
nector. connector in the
circuit.
Go to step 9. Repair harness
and connector
between TCM and
data link connec-
tor.
Go to step 10. Repair harness
and connector
between TCM and
data link connec-
tor.
Go to step 11. Insert TCM con-
nector into TCM.
Repair poor con- Replace TCM.
tact. <Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
No