DTC B2B28: Passenger's Door Power Window Continuous Reversal

DTC detecting condition: 

When the number of times for detected continuous reverse operation counts 10 times or more. (Condition for addition: completion of reserve operation due to anti-pinch feature)

Trouble symptom: 

When the power window sub-switch is operated, passenger'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 (Passenger)]. 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/WINDOW/MIRRORS>POWER WINDOW SYSTEM>OPERATION .
   4. Operate the power window main switch and check that the power window (passenger'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 GLASS SLIDING SURFACE  .

   Inspect the following items.

   • Abnormal contact of the glass with the running channel
   • Running channel deformation or foreign materials caught in it
   • Running channel misalignment
   • Weather strips outer and inner that got caught in the glass
   • Glass that is at a slant or catches on something

   Is the check result OK?

   Yes:  Go to  3.

   No:  Repair or replace the faulty portion, Go to  3.

3. CHECK GLASS SLIDING RESISTANCE  .
   1. Remove mounting bolts on the glass.
   2. Roll up/down the glass by hand and inspect the following items.
   • Abnormal contact of the glass with the running channel
   • Running channel deformation or foreign materials caught in it
   • Running channel misalignment
   • Weather strips outer and inner that got caught in the glass
   • Glass that is at a slant or catches on something

   Is the check result OK?

   Yes:  Replace the front regulator and motor assembly (passenger's side). Ref. to GLASS/WINDOW/MIRRORS>FRONT REGULATOR AND MOTOR ASSEMBLY .

   No:  Repair or replace faulty parts.