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Home >> Subaru >> 2005 >> Outback R VDC Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO U5 (PZEV))) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0128 Coolant Thermostat (Engine Coolant Temperature Below Thermostat Regulating Temperature) >> Diagnostic Method >> Abnormality Judgment

Abnormality Judgment

WARNING: This page is about a different variant/trim than selected.

Judge NG when the continuous time of completing the malfunction criteria below becomes more than 30 seconds.

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Battery voltage >/= 10.9 V
Engine coolant temperature at engine starting < 55°C (131°F)
Estimated engine coolant temperature >/= 70°C (158°F)
Estimated ambient temperature >/= -7°C (19°F)
Engine coolant temperature < 70°C (158°F)
(Estimated - measured) coolant temperature > 30°C (86°F)
Vehicle speed >/= 30 km/h (19 MPH)

Time Needed for Diagnosis:  Not fixed

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.