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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 P0101 Mass Or Volume Air Flow Sensor "A" Circuit Range/Performance >> Diagnostic Method

Diagnostic Method

Judge as NG when Low side or High side becomes NG.

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
Low 
Output voltage
< Map 1
High 
Output voltage
≥ Map 2
MAP 1 SPECIFICATION

Engine speed (RPM) 1500 3000 4000 5000 6000 6500
Output voltage value (V) 1.48 1.48 1.48 1.48 1.48 1.48
Air amount (g/s) 10.84 10.84 10.84 10.84 10.84 10.84
MAP 2 SPECIFICATION

Engine speed (RPM) 475 700 900
Output voltage value (V) 1.48 1.48 1.48
Air amount (g/s) 10.84 10.84 10.84

Time Needed for Diagnosis: 

Low: 5 s

High: 5 s

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