Subaru 2009 IMPREZA Service Manual page 813

Diagnostic Trouble Code (DTC) Detecting Criteria
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously under 3000 rpm engine speed.
5. DIAGNOSTIC METHOD
• Abnormality Judgement
Judge as NG when the following conditions are established.
Judgement Value
Malfunction Criteria
Cylinder number identification
Amount of crank sensor signal during 1 rev.
Time Needed for Diagnosis: 10 engine revs.
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
• Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more
than the predetermined time.
Judgement Value
Malfunction Criteria
Cylinder number identification
Amount of crank sensor signal during 1 rev.
Time Needed for Diagnosis: Less than 1 second
Threshold Value
Completed
Not = 30
Threshold Value
Completed
= 30
GD(H4SO)-89
GENERAL DESCRIPTION