DTC B2240: Can Communication (Audio) Stuck

DTC detecting condition: 

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

Trouble symptom: 

Vehicle linkage cannot function. (Air conditioner operation, vehicle information, vehicle setting customizing, etc.)

1. CHECK DTC  .

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

   Is the check result OK?

   Yes  : Go to  2.

   No  : Perform the inspection according to the diagnosis for LAN system.

2. CHECK COCKPIT CONTROL MODULE  .
   1. Using the Subaru Select Monitor, perform the clear memory of [Cockpit Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY
   2. Turn the ignition switch to OFF, and Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY
   3. Install the ground terminal to the battery sensor and turn the ignition switch to ON.
   4. Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) 

   Is DTC B2240 displayed? (Current code)

   Yes  : Replace the cockpit control module. Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY

   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.