Regulator & Motor Assembly

Trouble symptom:

Cannot communicate with [Power Window (Driver)], [Power Window (Passenger)], [Power Window (Rear Right)] or [Power Window (Rear Left)].

Detecting condition:

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

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.

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 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 . Ref. to STARTING/CHARGING SYSTEMS (H4DOTC)>BATTERY .
Is the battery OK?

Yes: Go to 3.

No: Charge or replace the 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 LAN system OK?

Yes: Go to 5.

No: Perform the inspection according to the diagnosis for LAN system.
CHECK REGULATOR & MOTOR ASSEMBLY CONNECTOR .
1. Turn the ignition switch to OFF.
2. Check the regulator & motor assembly connector.
Is the regulator & motor assembly connector inserted into the regulator & motor assembly until the clamp locks onto it?

Yes: Go to 6.

No: Insert the regulator & motor assembly connector into the regulator & motor assembly.
CHECK POWER SUPPLY CIRCUIT .
1. Disconnect the regulator & motor assembly connector.
2. Turn the ignition switch to ON. (Engine OFF)
3. Using a tester, measure the ignition power supply voltage between the regulator & motor assembly connector and chassis ground.
  Connector & terminal
  
  Driver's seat
  
  (Df52) No. 5 (+) - Chassis ground (-):
  
  Passenger's seat
  
  (Df51) No. 5 (+) - Chassis ground (-):
  
  Rear seat RH
  
  (Dr41) No. 5 (+) - Chassis ground (-):
  
  Rear seat LH
  
  (Dr42) No. 5 (+) - Chassis ground (-):
Is the voltage 10 - 15 V?

Yes: Go to 8.

No: Go to 7.
CHECK CIRCUIT BREAKER .
Check the circuit breaker. Ref. to GLASS/WINDOWS/MIRRORS>RELAY AND FUSE>INSPECTION .

Is the check result OK?

Yes: Repair the open circuit of harness between the regulator & motor assembly and battery.

No: Replace the circuit breaker. Ref. to GLASS/WINDOWS/MIRRORS>RELAY AND FUSE .
CHECK HARNESS BETWEEN THE REGULATOR & MOTOR ASSEMBLY AND CHASSIS GROUND .
1. Turn the ignition switch to OFF.
2. Using a tester, measure the resistance of harness between the regulator & motor assembly connector and chassis ground.
  Connector & terminal
  
  Driver's seat
  
  (Df52) No. 1 - Chassis ground:
  
  Passenger's seat
  
  (Df51) No. 1 - Chassis ground:
  
  Rear seat RH
  
  (Dr41) No. 1 - Chassis ground:
  
  Rear seat LH
  
  (Dr42) No. 1 - Chassis ground:
Is the resistance less than 1 Ω?

Yes: Go to 9.

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

Is there poor contact in the regulator & motor assembly 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 regulator & motor assembly. If the communication is possible, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.