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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Engine Control System (Diagnostics) (P000A To P015B) (H4DO)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0111 Intake Air Temperature Sensor 1 Circuit Range/Performance Bank 1 >> Diagnostic Method >> Diagnosis 1

Diagnosis 1

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

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
|Intake air temperature 30 sec. after engine start - Engine coolant temperature at engine start| > Value of Map 3
|Intake air temperature 30 sec. after engine start - Ambient air temperature 30 sec. after engine start| > Value of Map 4
MAP 3 SPECIFICATION

Ambient temperature °C (°F) -30 (-22) 30 (86) 45 (113) 60 (140)
|Intake air temperature 30 sec. after engine start - Engine coolant temperature at engine start| °C (°F) 12 (21.6) 12 (21.6) 22 (39.6) 22 (39.6)
MAP 4 SPECIFICATION

Ambient temperature °C (°F) -30 (-22) 30 (86) 45 (113) 60 (140)
|Intake air temperature 30 sec. after engine start - Ambient air temperature 30 sec. after engine start| °C (°F) 20 (36) 20 (36) 32 (57.6) 32 (57.6)

Time needed for diagnosis:  Less than 1 second

Diagnosis 2 

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Output voltage difference between Max. and Min. < 0.02V (Equivalent to approximately 0.5°C (0.9°F) near 25°C (77°F))

Time needed for diagnosis:  Less than 1 second

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