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

Trouble causes: 

• Front regulator & 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>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/WINDOWS/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 & motor assembly (passenger's side). Ref. to GLASS/WINDOWS/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/WINDOWS/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/WINDOWS/MIRRORS>POWER WINDOW CONTROL SWITCH

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

      Connector & terminal 

      (Df35) No. 1 - (Df51) 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 & 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 & terminal 

      (Df35) No. 1 (+) - Chassis ground (-):

   Is the voltage less than 1 V?

   Yes  : Replace the front regulator & motor assembly (passenger's side). Ref. to GLASS/WINDOWS/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 & motor assembly (passenger's side) connector.