Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc b2240 can communication (audio) stuck

Subaru Legacy BN/BS (2015-2019) Service Manual / Infotainment system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc b2240 can communication (audio) stuck

DTC DETECTING CONDITION:

Detected when the resistor is stuck during the CAN bus communication process.

TROUBLE SYMPTOM:

Screen display does not link with combination meter or vehicle.

STEP	CHECK	YES	NO
1.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 B2240 CAN COMMUNICATION (AUDIO) STUCK
2.CHECK 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 B2240 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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Other materials:

Caution
• Be careful of the following items. Failing to do so may cause the airbag system malfunction.– Yellow connectors and harnesses with yellow tapes around them are the connectors and harnesses for the airbag system. When using a tester on these circuits, follow the cautions of “AIRBAG S ...