DTC B2B22: Passenger's Door Power Window Manual Down Switch Stuck

DTC detecting condition: 

When DOWN Terminal Input ON is received for 20±1 seconds or longer.

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)

Wiring diagram: 

Power window system Ref. to WIRING SYSTEM>POWER WINDOW SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK FRONT POWER WINDOW SUB-SWITCH UNIT  .

   Perform the inspection of front power window sub-switch unit. Ref. to GLASS/WINDOW/MIRRORS>POWER WINDOW CONTROL SWITCH .

   Is the front power window sub-switch OK?

   Yes:  Go to  2 .

   No:  Replace the front power window sub-switch. Ref. to GLASS/WINDOW/MIRRORS>POWER WINDOW CONTROL SWITCH .

2. CHECK HARNESS (OPEN CIRCUIT)  .
   1. Disconnect the front power window sub-switch connector.
   2. Disconnect the front regulator and motor assembly (passenger's side) connector.
   3. Using a tester, measure the resistance between front power window sub-switch connector and front regulator and motor assembly connector (passenger's side).

      Connector and terminal 

      (Df35) No. 5 - (Df51) No. 6:

   Is the resistance less than 1 Ω?

   Yes:  Go to  3 .

   No:  Repair the open circuit of the harness between front power window sub-switch connector and front regulator and motor assembly connector (passenger's side).

3. CHECK HARNESS (GROUND SHORT CIRCUIT)  .

   Using a tester, measure the resistance between the front power window sub-switch connector and chassis ground.

   Connector and terminal 

   (Df35) No. 5 - Chassis ground:

   Is the resistance 1 MΩ or more?

   Yes:  Go to  4 .

   No:  Repair the short circuit to ground in harness between front power window sub-switch connector and front regulator and motor assembly (passenger's side) connector.

4. CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY)  .
   1. Turn the ignition switch to ON.
   2. Using a tester, measure the voltage between the front power window sub-switch connector and chassis ground.

      Connector and terminal 

      (Df35) No. 5 (+) - Chassis ground (-):

   Is the voltage less than 1 V?

   Yes:  Go to  5 .

   No:  Repair the short circuit to power supply in the harness between front power window sub-switch connector and front regulator and motor assembly (passenger's side) connector.

5. ACTIVE TEST  .

   Using the Subaru Select Monitor, check the following items in the [Active Test] of [Power Window (Passenger)]. Ref. to Power Window (Diagnostics)>Active Test .

   • Power Window Operation Test

   Does the window roll up and down?

   Yes:  Go to  6 .

   No:  Replace the front regulator and motor assembly (passenger's side). Ref. to GLASS/WINDOW/MIRRORS>FRONT REGULATOR AND MOTOR ASSEMBLY .

6. 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 B2B22 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.