Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc b2241 can communication

Subaru Legacy BN/BS (2015-2019) Service Manual / Infotainment system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc b2241 can communication

DTC DETECTING CONDITION:

Detected when there has been no proper communication in 10 seconds with the driver control of serial communication between CAN microcomputer and main microcomputer.

TROUBLE SYMPTOM:

Screen display does not link with combination meter or vehicle.

STEP	CHECK	YES	NO
1.CHECK AUDIO (7-INCH DISPLAY) OR NAVIGATION UNIT. 1) Turn the ignition switch to OFF. 2) Turn the ignition switch to ACC.	Is the audio (7-inch display) or navigation unit activated-	Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2241 CAN COMMUNICATION
2.CHECK DTC. Inspect LAN system. Basic Diagnostic Procedure > PROCEDURE	Is there any fault-	Perform the diagnosis according to diagnosis for LAN system.	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2241 CAN COMMUNICATION
3.CHECK AUDIO (7-INCH DISPLAY) OR NAVIGATION UNIT. 1) Perform the Clear Memory Mode. Clear Memory Mode 2) Turn the ignition switch to OFF > ON. 3) Read the DTC again. Read Diagnostic Trouble Code (DTC)	Is DTC B2241 displayed- (Current malfunction)	Replace the audio (7-inch display) or navigation unit. Audio Navigation Body	Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

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