DTC B2B27: Passenger's Door Power Window Position

DTC detecting condition:

Top dead position error: In UP operation, when the window position counter reads -80 edge or less. (Except uninitialized state)

Bottom dead position error: In DOWN operation, when the window position counter reads +130 edge or more of the bottom dead position. (Except uninitialized state)

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)

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to POWER WINDOW (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .

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 sub-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.
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 B2B27 displayed?

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.