Subaru IMPREZA GD 2007 Series Manual page 1846

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Diagnostic Trouble Code (DTC) Detecting Criteria
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of meeting the malfunction criteria below becomes 30 seconds or
more.
Judgment Value
Malfunction Criteria
Battery voltage
Estimate ambient temperature
Engine coolant temperature at engine
starting
Estimated coolant temperature
Engine coolant temperature
(Estimated – measured) Engine coolant
temperature
Vehicle speed
Time Needed for Diagnosis: 30 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in two continuous driving
cycles.
Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are met.
Judgment Value
Malfunction Criteria
Battery voltage
Estimate ambient temperature
Thermostat malfunction diagnosis
Engine coolant temperature at engine
starting
Engine coolant temperature
(Estimated – measured) Engine coolant
temperature
6. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" is performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
• When the OK driving cycle is completed three times in a row
• When "Clear Memory" is performed
8. FAIL SAFE
None
9. ECM OPERATION AT DTC SETTING
• Memorize the freeze frame data. (For test mode $02)
• Memorize the diagnostic value and trouble standard value. (For test mode $06)
Threshold Value
≥ 10.9 V
≥ –7°C (19°F)
< 55°C (131°F)
≥ 70°C (158°F)
< 70°C (158°F)
> 30°C (86°F)
≥ 30 km/h (19 MPH)
Threshold Value
≥ 10.9 V
≥ –7°C (19°F)
Incomplete
< 55°C (131°F)
≥ 70°C (158°F)
≤ 30°C (68°F)
GD(H4DOTC)-55
GENERAL DESCRIPTION