Subaru Legacy 2004 Service Manual page 599

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
AV:DTC P0605 INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM)
ERROR
NOTE:
For the diagnostic procedure, refer to DTC P0607. <Ref. to EN(H4SO 2.0)(diag)-168, DTC P0607 CON-
TROL MODULE PERFORMANCE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
Check
Is any other DTC displayed?
EN(H4SO 2.0)(diag)-167
ENGINE (DIAGNOSTICS)
Yes
Inspect the rele- Temporary poor
vant DTC using contact occurs.
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4SO
2.0)(diag)-66, List
of Diagnostic Trou-
ble Code (DTC).>
No