Front Power Window Motor

Trouble symptom:

Cannot communicate with [Power Window (Driver)] or [Power Window (Passenger)].

Detecting condition:

Defective harness connector
Power supply circuit malfunction
Defective CAN communication circuit
Defective Subaru Select Monitor

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

Wiring diagram:

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

CAN communication system Ref. to WIRING SYSTEM>CAN COMMUNICATION SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CHECK IGNITION SWITCH .
Check the ignition switch.

Is the ignition switch ON?

Yes: Go to 2.

No: Turn the ignition switch to ON, and Go to 2.
CHECK BATTERY .
1. Turn the ignition switch to OFF.
2. Check the battery. Ref. to STARTING/CHARGING SYSTEMS (H4DO)>BATTERY>INSPECTION .
Is the check result OK?

Yes: Go to 3.

No: Charge or replace the battery. Ref. to STARTING/CHARGING SYSTEMS (H4DO)>BATTERY .
CHECK FUSE .
Check the fuse. Ref. to WIRING SYSTEM>POWER WINDOW SYSTEM>WIRING DIAGRAM .

Is the check result OK?

Yes: Go to 4.

No: Replace the fuse. When the replaced fuse is blown immediately, repair the power supply circuit.
CHECK LAN SYSTEM .
Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

Is the check result OK?

Yes: Go to 5.

No: Perform the inspection according to the diagnosis for LAN system.
CHECK FRONT POWER WINDOW MOTOR CONNECTOR .
1. Turn the ignition switch to OFF.
2. Check the front power window motor connector.
Is the front power window motor connector inserted into the front power window motor until the clamp locks?

Yes: Go to 6.

No: Insert the front power window motor connector into the front power window motor.
CHECK POWER SUPPLY CIRCUIT .
1. Disconnect the front power window motor connector.
2. Turn the ignition switch to ON. (Engine OFF)
3. Using a tester, measure the ignition power supply voltage between the front power window motor connector and chassis ground.
  Connector & terminal
  
  Driver's seat
  
  (Df52) No. 5 (+) - Chassis ground (-):
  
  Passenger's seat
  
  (Df51) No. 5 (+) - Chassis ground (-):
Is the voltage 10 - 15 V?

Yes: Go to 7.

No: Repair the open circuit of the harness between the front power window motor and battery.
CHECK HARNESS BETWEEN FRONT POWER WINDOW MOTOR AND CHASSIS GROUND .
1. Turn the ignition switch to OFF.
2. Using a tester, measure the harness resistance between the front power window motor connector and chassis ground.
  Connector & terminal
  
  Driver's seat
  
  (Df52) No. 1 - Chassis ground:
  
  Passenger's seat
  
  (Df51) No. 1 - Chassis ground:
Is the resistance less than 1 Ω?

Yes: Go to 8.

No: Repair the open circuit of the front power window motor ground circuit and the poor contact of connector.
CHECK POOR CONTACT OF CONNECTORS .
Check the front power window motor power supply, ground circuit, or data link connector for poor contact.

Is there poor contact in the front power window motor power supply, ground circuit, or data link connector?

Yes: Repair the poor contact of connector.

No: If initialization communication using Select Monitor is impossible at this time, replace the front power window motor. If the communication is possible, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.