Subaru LEGACY 2004 Service Manual page 691

Step
8 PERFORM THE DIAGNOSIS.
1) Inspect using the "Diagnostic Procedure
with Diagnostic Trouble Code (DTC)".
<Ref. to IM(diag)-17, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
2) Repair the trouble cause.
3) Perform clear memory mode.
4) Read DTC again.
Basic Diagnostic Procedure
Is the DTC displayed on
screen?
IM(diag)-3
IMMOBILIZER (DIAGNOSTICS)
Check Yes
Inspect using the
"Diagnostic Proce-
dure with Diagnos-
tic Trouble Code
(DTC)". <Ref. to
IM(diag)-17, Diag-
nostic Procedure
with Diagnostic
Trouble Code
(DTC).>
No
Finish the diagno-
sis.