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Subaru
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2021
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Ascent Base
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Repair and Diagnosis (Single Page)
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Engine Performance
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Testing & Diagnosis
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Engine Control System (Diagnostics) (4 Of 4)
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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
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DTC U0077: Lin Communication Bus "ECM/Pcm" Off
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General Description
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General Driving Cycle
General Driving Cycle
Always perform the diagnosis continuously after the enable conditions have been established.