DTC B2252: Speaker Line Shorts To GND

DTC detecting condition: 

Ground short circuit occurrence of any of CH1 - CH8 is notified by Harman amplifier.

Trouble symptom: 

Does not sound.

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

   Is DTC B2252 displayed? (Current code)

   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. Ref. to ENTERTAINMENT & MONITORING>POWER AMPLIFIER
   2. Using the Subaru Select Monitor, perform the clear memory of [Cockpit Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY
   3. Turn the ignition switch OFF → ON.
   4. Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) 

   Is DTC B2252 displayed? (Current code)

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

   No  : Audio amplifier has a failure. Replace the audio amplifier. Ref. to ENTERTAINMENT & MONITORING>POWER AMPLIFIER