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DTC B278B: Can Control Module Stuck

DTC detecting condition: 

When incompatible state is detected two times in a row in every Wake-up of microcomputer, after detecting incompatible state between written data and read-out data to/from register for CAN check after resetting.

(When the data do not match for three consecutive times (one time at resetting + two times at microcomputer Wake-up).)

Trouble symptom: 

The operation is performed with information of the last value as right, but basically the system operation is deactivated.

NOTE:

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