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Home >> Subaru >> 2019 >> WRX Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Security And Locks - Keyless Access (W/Push Button Start) (Diagnostics) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC B278B: CAN Control Module Stuck

DTC B278B: CAN Control Module Stuck

DTC detecting condition: 

When mismatch is detected two consecutive times for every Wake Up of the microcomputer after the mismatch of the data written into the CAN check-targeted resistor and the read data is detected after resetting.

(When mismatch is detected three consecutive times in total: once at resetting + twice at microcomputer Wake UP)

Trouble symptom: 

Operation is performed using the previous value information as true. However, basically the system becomes inoperative.

NOTE: Perform the diagnosis for LAN system. Refer to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .