DTC B2251: Speaker Line Shorts To +B

DTC detecting condition: 

Detected when the speaker signal line is shorted to power supply.

Trouble symptom: 

Does not sound.

1. CHECK DTC  .
   1. Using the Subaru Select Monitor, perform the clear memory of [Cockpit Control]. Refer to COMMON (DIAG)>CLEAR MEMORY .
   2. Turn the ignition switch OFF → ON.
   3. Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Refer to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B2251 displayed? (Current malfunction)

   Yes  : Go to  2.

   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.
2. CHECK CONNECTOR  .

   Check the harness between the cockpit control module connector and audio amplifier.

   Is the check result OK?

   Yes  : Go to  3.

   No  : Repair the harness or replace the components.

3. CHECK AUDIO AMPLIFIER  .
   1. Replace the audio amplifier with a new or properly functioning part. Refer to ENTERTAINMENT & MONITORING>POWER AMPLIFIER .
   2. Using the Subaru Select Monitor, perform the clear memory of [Cockpit Control]. Refer to COMMON (DIAG)>CLEAR MEMORY .
   3. Turn the ignition switch OFF → ON.
   4. Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Refer to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B2251 displayed? (Current malfunction)

   Yes  : Return the audio amplifier to its original position, and replace the cockpit control module. Refer to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY .

   No  : Audio amplifier has a failure.