The Driver's Power Window Incorrectly Reverses During Up Operation (Does Not Fully Close), Or It Incorrectly Stops During Down Operation (Does Not Fully Open)

Trouble causes: 

• Front regulator & motor assembly (driver's side) failure
• Foreign materials caught in related parts
• Faulty assembly of power window-related parts
• Running channel malfunction

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor, read the DTCs of [Power Window (Switch)] and [Power Window (Driver)]. Ref. to POWER WINDOW (DIAGNOSTICS) >DIAGNOSTIC TROUBLE CODE (DTC) 
      • Power Window (Switch)
      • Power Window (Driver)

   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  2.

2. SYSTEM INITIALIZATION  .
   1. Using the Subaru Select Monitor, perform [System Initialization] of [Power Window (Driver)]. Ref. to POWER WINDOW (DIAGNOSTICS) >WORK SUPPORT>OPERATION>SYSTEM INITIALIZATION 
   2. Perform the initial setting of the power window. Ref. to GLASS/WINDOWS/MIRRORS>POWER WINDOW SYSTEM>OPERATION
   3. Operate the power window main switch and check that the power window (driver's side) operates.

   Does the power window operate normally according to switch operation?

   Yes  : Currently returned to a normal condition. Proper sliding resistance was recorded by initialization.

   No  : Go to  3.

3. CHECK GLASS SLIDING SURFACE  .

   Inspect the following items.

   • Abnormal contact of the glass with the running channel
   • Running channel deformation or foreign materials caught in it
   • Running channel misalignment
   • Weather strips outer and inner that got caught in the glass
   • Glass that is at a slant or catches on something
   NOTE:

   Check the sliding resistance near the sliding surface of the glass that incorrectly reverses or stops. 

   Is the check result OK?

   Yes  : Go to  4.

   No  : Repair or replace the faulty portion, Go to  4.

4. CHECK GLASS SLIDING RESISTANCE  .
   1. Remove mounting bolts on the glass.
   2. Roll up/down the glass by hand and inspect the following items.
      • Abnormal contact of the glass with the running channel
      • Running channel deformation or foreign materials caught in it
      • Running channel misalignment
      • Weather strips outer and inner that got caught in the glass
      • Glass that is at a slant or catches on something
      NOTE:

      Check the sliding resistance near the sliding surface of the glass that incorrectly reverses or stops. 

   Is the check result OK?

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

   No  : Repair or replace faulty parts.