When The Passenger's Switch Is Operated, The Passenger's Side Power Window Does Not Work In Automatic Operation

Trouble causes: 

• Front regulator and motor assembly (passenger's side) failure
• Power window main switch failure
• Front power window sub-switch malfunction
• LIN communication error
• Body integrated unit malfunction
• Harness malfunction
• Poor contact of connector
• Power supply circuit malfunction

Wiring diagram: 

Power window system Ref. to WIRING SYSTEM (IMPREZA MODEL)>POWER WINDOW SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (EXCEPT FOR HEV))>POWER WINDOW SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>POWER WINDOW SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK MALFUNCTIONS  .
   1. Turn the ignition switch to ON.
   2. Operate the front power window sub-switch and check that the power window (passenger's side) works in manual operation.

   Does the power window operate manually according to switch operation?

   Yes:  Go to  2.

   No:  Perform the diagnosis for "When the passenger's switch is operated, the passenger's side power window does not work in manual operation". Ref. to POWER WINDOW (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON>INSPECTION>WHEN THE PASSENGER'S SWITCH IS OPERATED, THE PASSENGER'S SIDE POWER WINDOW DOES NOT WORK IN MANUAL OPERATION .

2. CHECK DTC  .

   Using the Subaru Select Monitor, read the DTCs of [Power Window (Switch)] and [Power Window (Passenger)]. Ref. to POWER WINDOW (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   • Power Window (Switch)
   • Power Window (Passenger)

   Are any DTCs displayed?

   Yes:  Perform the diagnosis for the displayed DTCs. Ref. to POWER WINDOW (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

   No:  Go to  3.

3. CHECK [ECU Control Mode] (DATA MONITOR)  .

   Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Power Window (Passenger)]. Ref. to POWER WINDOW (DIAGNOSTICS)>DATA MONITOR .

   • ECU Control Mode

   Is [Initialized] displayed?

   Yes:  Go to  4.

   No:  Using the Subaru Select Monitor, perform [System Initialization] of [Power Window (Passenger)]. Ref. to POWER WINDOW (DIAGNOSTICS)>WORK SUPPORT>OPERATION>SYSTEM INITIALIZATION .

   Then, perform the initial setting of the power window. Ref. to GLASS/WINDOW/MIRRORS>POWER WINDOW SYSTEM>OPERATION .

4. CHECK [One's Seat Switch] (DATA MONITOR)  .

   Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Power Window (Passenger)]. Ref. to POWER WINDOW (DIAGNOSTICS)>DATA MONITOR .

   • One's Seat Switch

   Does the display change corresponding to the switch operation?

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

   No:  Go to  5.

5. CHECK FRONT POWER WINDOW SUB-SWITCH  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the front power window sub-switch connector.
   3. Perform the inspection of front power window sub-switch unit. Ref. to GLASS/WINDOW/MIRRORS>POWER WINDOW CONTROL SWITCH .

   Is the check result OK?

   Yes:  Go to  6.

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

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

      Connector and terminal 

      (D17) No. 1 - (D13) No. 4:

      Is the resistance less than 1 Ω?

   Yes:  Go to  7.

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

7. 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 

      (D17) No. 1 (+) - Chassis ground (-):

   Is the voltage less than 1 V?

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

   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.