Subaru 2009 IMPREZA Service Manual page 1747

Diagnostic Trouble Code (DTC) Detecting Criteria
CE:DTC P0605 INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM)
ERROR
1. OUTLINE OF DIAGNOSIS
Judge as NG when SUM value of ROM is outside the standard value.
2. ENABLE CONDITION
Secondary Parameters
Ignition switch
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. DIAGNOSTIC METHOD
Abnormality Judgement
Judge as NG if the criteria below are met.
Judgement Value
Malfunction Criteria
SUM value of ROM
Time Needed for Diagnosis: Undetermined
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Enable Conditions
ON
Threshold Value
Standard
GD(H4DOTC)-159
GENERAL DESCRIPTION