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Home >> Subaru >> 2019 >> WRX STI >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (STI) (4 Of 4) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC U0073: Control Module Communication Bus OFF >> Diagnostic Method

Diagnostic Method

Judge as NG when the following conditions are established.

Judgment value 

Malfunction Criteria Threshold Value
CAN bus condition = "Bus off"

time needed for diagnosis:  436 ms

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