DTC B2B24: Passenger's Door Power Window Pulse 1 No Signal

DTC detecting condition: 

When the power window is rolling up (except in fully closed zone), change in pulse 1 phase (edge) is not detected while pulse 2 phase is producing 10 edges.

Trouble symptom: 

• When the power window sub-switch is operated, passenger's side window does not work.
• 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. 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.
   2. Operate the power window sub-switch and roll passenger's side window up and down.

   Does the window roll up and down?

   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  .

   Read the DTC of [Power Window (Passenger)] using the Subaru Select Monitor. Ref. to Power Window (Diagnostics)>Diagnostic Trouble Code (DTC) .

   Is DTC B2B24 displayed? (Current malfunction)

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

   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.