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Home >> Subaru >> 2018 >> Crosstrek Base, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (4 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC U0077: Lin Communication Bus "ECM/Pcm" Off >> 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 

Malfunction Criteria Threshold Value
LIN bus condition Equal to Bus off

Time needed for diagnosis:  1.28 s

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