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Home >> Subaru >> 2021 >> Outback Premium >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2.5L) (Diagnostics) (3 Of 4) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P1261: Cylinder 1 Direct Fuel Injector Circuit/Open >> General Description >> Diagnostic Method
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Diagnostic Method

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

JUDGMENT VALUE - DIAGNOSIS 1

Malfunction Criteria Threshold Value
Injector driving IC wrong operation signal (0.2 A or less) ON
JUDGMENT VALUE - DIAGNOSIS 2

Malfunction Criteria Threshold Value
Injector driving IC wrong operation signal (32.4 A or more) ON
JUDGMENT VALUE - DIAGNOSIS 3

Malfunction Criteria Threshold Value
Injector driving IC wrong operation signal (1 V or less) ON
JUDGMENT VALUE - DIAGNOSIS 4

Malfunction Criteria Threshold Value
Injector driving IC wrong operation signal (5 V or more) ON
JUDGMENT VALUE - DIAGNOSIS 5

Malfunction Criteria Threshold Value
Injector control voltage Less than 3.92 V
JUDGMENT VALUE - DIAGNOSIS 6

Malfunction Criteria Threshold Value
Injector control voltage 3.92 V or more

Time needed for diagnosis: 

Diagnosis 1, 2, 5: Map1

Diagnosis 3, 4, 6: Map2

ENGINE SPEED - MAP1

Engine speed (rpm) 500 2000 4000
Time when calculation was performed 10 times (sec) 2.4 0.6 0.3
ENGINE SPEED - MAP2

Engine speed (rpm) 0 500 2000 4000
Time when calculation was performed 10 times (sec) 0.04 2.4 0.6 0.3

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