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.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to INFOTAINMENT (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .

CHECK DTC .
Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS) (EXCEPT FOR HEV)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE . Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

Is the check result OK?

Yes: Go to 2.

No: Perform the inspection according to the diagnosis for LAN system.
CHECK NAVIGATION UNIT .
1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor, perform the clear memory of [Infotainment]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
3. Turn the ignition switch OFF → ON.
4. Read the DTC of [Infotainment] using the Subaru Select Monitor. Ref. to INFOTAINMENT (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B2240 displayed? (Current malfunction)

Yes: Replace the audio or navigation unit. Ref. to ENTERTAINMENT & MONITORING>AUDIO . Ref. to ENTERTAINMENT & MONITORING>NAVIGATION BODY .

No: 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.