DTC B2B09: Driver's Door Power Window Control Module EEPROM

DTC detecting condition: 

When one of the following data cannot be read from the non-volatile memory as the CPU is reset.

• Window position
• Sliding learn value
• Initialization completed state
• Full open stop position

Trouble symptom: 

• When the power window main switch is operated, driver's side window does not work.
• When the power window main switch is operated, driver's side window rolls down only in manual down operation, or inches up. (Inch up: Operating the switch rolls up the window about 10 mm only)

1. SYSTEM INITIALIZATION  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor, perform [System Initialization] of [Power Window (Driver)]. Ref. to POWER WINDOW (DIAGNOSTICS)>WORK SUPPORT>OPERATION>SYSTEM INITIALIZATION .
      NOTE:

      Record the DTCs and FFD because they will be erased when the initialization is performed. 

   3. Perform the initial setting of the power window. Ref. to GLASS/WINDOWS/MIRRORS>POWER WINDOW SYSTEM>OPERATION .
   4. Operate the power window main switch and check that the power window (driver's side) operates.

   Does the power window operate normally according to switch operation?

   Yes  : 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. 

   No  : Go to  2.

2. CHECK DTC