A/C Or Self-Diagnosis Systems Do Not Operate: Wiring Diagram

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: A/C Or Self-Diagnosis Systems Do Not Operate - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE CHART

Step	Check	Yes	No
1 CHECK FUSE. Turn the ignition switch to OFF. Remove the fuse No. 7, No. 22 and No. 31 from fuse & relay box. Check the condition of fuse.	Is the fuse blown out?	Replace the fuse.	Go to step 2 .
2 CHECK A/C CONTROL MODULE POWER CIRCUIT. Remove the A/C control module. Disconnect the A/C control module harness connector. Turn the ignition switch to ACC, and measure the voltage between A/C control module harness connector terminal and chassis ground. Connector & terminal (i88) No. 15 (+) - Chassis ground (-):	Is the voltage 10 V or more?	Go to step 3 .	Check for open or short circuit in the harness between A/C control module and fuse.
3 CHECK A/C CONTROL MODULE POWER CIRCUIT. Measure the voltage between A/C control module harness connector terminal and chassis ground after turning the ignition switch to ON. Connector & terminal (i88) No. 32 (+) - Chassis ground (-):	Is the voltage 10 V or more?	Go to step 4 .	Check for open or short circuit in the harness between A/C control module and fuse.
4 CHECK A/C CONTROL MODULE GROUND CIRCUIT. Measure the resistance of harness between A/C control module and chassis ground after turning the ignition switch to OFF. Connector & terminal (i88) No. 34 - Chassis ground:	Is the resistance less than 1 Ω?	Go to step 5 .	Repair the harness for ground line.
5 CHECK FOR POOR CONTACT. Check poor contact of auto A/C control module connector.	Is there poor contact of connector?	Repair the connector.	Replace the auto A/C control module. < Ref. to REMOVAL , Control Unit (Auto A/C Model). >