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 (DIAG)>CLEAR MEMORY .
   2. Turn the ignition switch to OFF, and Disconnect the ground terminal from battery sensor.
   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 malfunction)

   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.