Subaru 2009 IMPREZA Service Manual page 653

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
BZ:DTC P0605 INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM)
ERROR
NOTE:
For the diagnostic procedure, refer to DTC P0607. <Ref. to EN(H4SO)(diag)-237, DTC P0607 THROTTLE
CONTROL SYSTEM CIRCUIT RANGE/PERFORMANCE, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
Check
EN(H4SO)(diag)-236
Yes No
Check the appro- Even if DTC is
priate DTC using detected, the cir-
the "List of Diag- cuit has returned to
nostic Trouble a normal condition
Code (DTC)". at this time. Repro-
<Ref. to duce the failure,
EN(H4SO)(diag)- and then perform
86, List of Diagnos- the diagnosis
tic Trouble Code again.
(DTC).>
NOTE:
In this case, tem-
porary poor con-
tact of connector
may be the cause.