Subaru 2003 LEGACY Service Manual page 161

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK HARNESS BETWEEN TCM AND
COMBINATION METER.
1) Turn ignition switch to OFF.
2) Disconnect connector from combination
meter and TCM.
3) Measure resistance between TCM connec-
tor and chassis ground.
Connector & terminal
(B56) No. 21 — Chassis ground:
Does the measured value exceed the spec-
ified value?
2 CHECK COMBINATION METER.
1) Connect connector to combination meter.
2) Turn ignition switch to ON. (Engine is
stopped.)
Does buzzer sound?
3 CHECK POOR CONTACT.
Is there poor contact in buzzer circuit?
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Value
1 MΩ
Buzzer sounds.
There is poor contact.
AT-159
Yes
Go to step 2. Repair short circuit
in harness
between TCM and
combination meter
connector.
Replace combina- Go to step 3.
tion meter.
Repair poor con- Replace TCM.
tact.
No