Subaru Legacy 2003 Service Manual page 2278

Step
5 PERFORM THE GENERAL DIAGNOSTICS.
1) Inspect using "Diagnostic Procedure for
No-diagnostic Trouble Code (DTC)". <Ref.
to AT-121, Diagnostic Procedure for No-
diagnostic Trouble Code (DTC).>
2) Inspect using "Symptom Related Diagnos-
tic". <Ref. to AT-160, Symptom Related
Diagnostic.>
3) Perform the clear memory mode.
With Subaru Select Monitor
<Ref. to AT-27, WITH SUBARU SELECT
MONITOR, OPERATION, Clear Memory
Mode.>
Without Subaru Select Monitor
<Ref. to AT-27, WITHOUT SUBARU
SELECT MONITOR, OPERATION, Clear
Memory Mode.>
4) Perform the inspection mode. <Ref. to AT-
26, Inspection Mode.>
Calling up the diagnostic trouble code
(DTC).
Without Subaru Select Monitor
<Ref. to AT-24, WITHOUT SUBARU
SELECT MONITOR, OPERATION, Read
Diagnostic Trouble Code (DTC).>
With Subaru Select Monitor
<Ref. to AT-25, WITH SUBARU SELECT
MONITOR, OPERATION, Read Diagnos-
tic Trouble Code (DTC).>
Is the DTC displayed?
BASIC DIAGNOSTIC PROCEDURE
DTC is displayed
AT-3
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Value
Go to step 6.
Yes No
Complete the
diagnosis.