Subaru IMPREZA GD 2007 Series Manual page 1816

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Diagnostic Trouble Code (DTC) Detecting Criteria
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG if the continuous time while the following criteria are met exceeds the determined time.
Judgment Value
Malfunction Criteria
(Low side error)
Output voltage
Engine speed
Throttle opening angle
Intake manifold pressure
(High side error 1)
Output voltage
Engine speed
Throttle opening angle
Intake manifold pressure
(High side error 2)
Output voltage
Engine speed
Throttle opening angle
Intake manifold pressure
Fuel system diagnosis
Time Needed for Diagnosis:
Low side 3 seconds
High side 10 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in two continuous driving
cycles.
Normality Judgment
Judge as OK if the criteria below are met.
Judgment Value
Malfunction Criteria
(Low side error)
Output voltage
Engine speed
Throttle opening angle
Intake manifold pressure
(High side error)
Output voltage
Engine speed
Throttle opening angle
Intake manifold pressure
Threshold Value
< 1.5 V
≥ 2,500 rpm
≥ 15°
≥ 53.3 kPa (400
mmHg, 15.7 inHg)
≥ 1.95 V
600 ←→ 900 rpm
< 4.1°
< 52.7 kPa (395
mmHg, 15.6 inHg)
≥ 1.7 V
600 ←→ 900 rpm
< 4.1°
< 52.7 kPa (395
mmHg, 15.6 inHg)
Rich side malfunction
Threshold Value
≥ 1.5 V
≥ 2,500 rpm
≥ 15°
≥ 53.3 kPa (400
mmHg, 15.7 inHg)
< 1.95 V
600 ←→ 900 rpm
< 4.1°
< 52.7 kPa (395
mmHg, 15.6 inHg)
GD(H4DOTC)-25
GENERAL DESCRIPTION