Subaru 2009 IMPREZA Service Manual page 815

Diagnostic Trouble Code (DTC) Detecting Criteria
5. DIAGNOSTIC METHOD
Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
Malfunction Criteria
Battery voltage
Amount of camshaft sensor signal during
2 revs.
Time Needed for Diagnosis: Two engine revs. × 4 time(s)
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
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
Voltage
Amount of camshaft sensor signal during
2 revs.
Time Needed for Diagnosis: Two engine revs.
Threshold Value
8 V
Not = 2
Threshold Value
8 V
= 2
GD(H4SO)-91
GENERAL DESCRIPTION