Driver's Side Power Window Does Not Work

Trouble causes:

Front regulator and motor assembly (driver's side) power supply circuit failure
Front regulator and motor assembly (driver's side) failure
Power window main switch failure
LIN communication error
Body integrated unit malfunction

Wiring diagram:

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

With off-delay function for driver's seat only

Courtesy of SUBARU OF AMERICA, INC.
Other than with off-delay function for driver's seat only

Courtesy of SUBARU OF AMERICA, INC.

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

CHECK BATTERY .
Check the battery. Ref. to STARTING/CHARGING SYSTEMS (H4DO)>BATTERY>INSPECTION .

Is the battery OK?

Yes: Go to 2 .

No: Charge or replace the battery.
CHECK DTC .
Read the DTC of [Power Window (Driver)] using the Subaru Select Monitor. Ref. to POWER WINDOW (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

Are any DTCs displayed? (Current malfunction)

Yes: Perform the diagnosis for the displayed DTCs. Ref. to POWER WINDOW (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST .

No: Go to 3 .
CHECK [Power Supply Voltage] (DATA MONITOR) .
1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Power Window (Driver)]. Ref. to POWER WINDOW (DIAGNOSTICS)>DATA MONITOR .
  - Power Supply Voltage
Is the displayed voltage approximately 10.0 V or more?

Yes: Go to 4 .

No: Replace the front regulator and motor assembly (driver's side). Ref. to GLASS/WINDOWS/MIRRORS>FRONT REGULATOR AND MOTOR ASSEMBLY .
CHECK [Operation Enable Signal] (DATA MONITOR) .
Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Power Window (Driver)]. Ref. to POWER WINDOW (DIAGNOSTICS)>DATA MONITOR .
- Operation Enable Signal
Is [ON] displayed?

Yes: Go to 5 .

No: Inspect the body integrated unit. Ref. to BODY CONTROL (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

If no fault is found in the body integrated unit, replace the front regulator and motor assembly (driver's side). Ref. to GLASS/WINDOWS/MIRRORS>FRONT REGULATOR AND MOTOR ASSEMBLY .
CHECK POWER WINDOW MAIN SWITCH .
Perform unit inspection of power window main switch. Ref. to GLASS/WINDOWS/MIRRORS>POWER WINDOW CONTROL SWITCH .

Is the power window main switch OK?

Yes: Go to 6 .

No: Replace the power window main switch. Ref. to GLASS/WINDOWS/MIRRORS>POWER WINDOW CONTROL SWITCH .
CHECK HARNESS (OPEN CIRCUIT) .
1. Turn the ignition switch to OFF.
2. Disconnect the power window main switch connector.
3. Disconnect the front regulator and motor assembly connector (driver's side).
4. Using a tester, measure the resistance between power window main switch and front regulator and motor assembly (driver's side) connectors.
  Connector and terminal
  
  With off-delay function for driver's seat only
  
  (D7) No. 14 - (D3) No. 8:
  
  (D7) No. 15 - (D3) No. 6:
  
  Other than with off-delay function for driver's seat only
  
  (D7) No. 12 - (D3) No. 8:
  
  (D7) No. 11 - (D3) No. 6:
Is the resistance less than 1 Ω?

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

No: Repair the open circuit of the harness between power window main switch and front regulator and motor assembly (driver's side) connectors.