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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostics) (P000A To P015B) (H4DOTC) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0116 Engine Coolant Temperature Sensor 1 Circuit Range/Performance >> Diagnostic Method

Diagnostic Method

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
|Engine coolant temperature at engine start - Intake air temperature 30 sec. after engine start| > Value from Map
|Engine coolant temperature at engine start - Ambient air temperature at engine start| > 25°C (45°F)
MAP SPECIFICATION

Ambient temperature °C (°F) -30 (-22) 30 (86) 45 (113) 60 (140)
|Engine coolant temperature at engine start - Intake air temperature 30 sec. after engine start| °C (°F) 12 (21.6) 12 (21.6) 22 (39.6) 22 (39.6)

Time needed for diagnosis:  Less than 1 second

Malfunction indicator light illumination:  Illuminates as soon as a malfunction occurs.