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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 53 (HVAC System (Auto Ac) (Diagnostics)) >> Diagnostics for A/C System Malfunction >> A/C Or Self-Diagnosis Systems Do Not Operate >> Wiring Diagram

A/C Or Self-Diagnosis Systems Do Not Operate: 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: Air Conditioning System - Wiring Diagram (Self-Diagnosis System Does Not Operate)
G07680296Courtesy of SUBARU OF AMERICA, INC.
Step Check Yes No
1 CHECK FUSE. 
  1. Turn the ignition switch to OFF.
  2. Remove the fuse No. 7, No. 22 and No. 31 from fuse & relay box.
  3. 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. 
  1. Remove the A/C control module.
  2. Disconnect the A/C control module harness connector.
  3. 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. < Refer to REMOVAL , Control Unit (Auto A/C Model). >
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