Mode Door Actuator: Wiring Diagram

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Air Conditioning System < Refer to appropriate SYSTEM WIRING DIAGRAM. >

Fig 1: Mode Door Actuator - Wiring Diagram (Air Flow Outlet Is Not Changed)

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK POWER SUPPLY FOR MODE DOOR ACTUATOR. Turn the ignition switch to OFF. Disconnect the mode door actuator connector. Turn the ignition switch to ON. Measure the voltage between the mode door actuator connector terminal and chassis ground. Connector & terminal (B77) No. 3 (+) - Chassis ground (-):	Is the voltage approx. 10 V or more?	Go to step 2 .	Check the DC power supply circuit.
2 CHECK MODE DOOR ACTUATOR. Turn the ignition switch to OFF. Measure the resistance between mode door actuator terminals using a tester. Connector & terminal (B77) No. 3 - No. 1: (B77) No. 3 - No. 2: (B77) No. 3 - No. 5: (B77) No. 3 - No. 6:	Is the resistance 80 - 100 Ω?	Go to step 3 .	Replace the mode door actuator.
3 CHECK HARNESS BETWEEN AUTO A/C CONTROL MODULE AND MODE DOOR ACTUATOR. Disconnect the auto A/C control module connector. Measure the resistance between auto A/C control module and mode door actuator connector. Connector & terminal (B77) No. 1 - (i88) No. 4: (B77) No. 2 - (i88) No. 3: (B77) No. 5 - (i88) No. 2: (B77) No. 6 - (i88) No. 1:	Is the resistance less than 1 Ω?	Go to step 4 .	Repair the harness between auto A/C control module and mode door actuator.
4 CHECK FOR POOR CONTACT. Check poor contact of auto A/C control module and connector.	Is there poor contact of connector?	Repair the connector.	Replace the auto A/C control module. < Refer to REMOVAL , Control Unit (Auto A/C Model). >