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SUNLOAD Sensor: 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: Sunload Sensor - Wiring Diagram (A/C System Is Controlled To Cool And Hot Side)
G05663227Courtesy of SUBARU OF AMERICA, INC.
Step Check Yes No
1 CHECK POWER SUPPLY VOLTAGE FOR SUNLOAD SENSOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from sunload sensor.
  3. Turn the ignition switch to ON.
  4. Measure the power supply voltage for sunload sensor.

    Connector & terminal 

    (i51) No. 2 (+) - No. 1 (-): 

 Is the voltage approx. 5 V? Go to step 4  . Go to step 2  .
2 CHECK HARNESS CONNECTOR BETWEEN AUTO A/C CONTROL MODULE AND SUNLOAD SENSOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from the auto A/C control module.
  3. Measure the resistance of the harness between the auto A/C control module and sunload sensor.

    Connector & terminal 

    (i51) No. 2 - (i88) No. 16: 

 Is the resistance less than 1 Ω? Go to step 3  . Repair the harness between auto A/C control module and sunload sensor.
3 CHECK HARNESS CONNECTOR BETWEEN AUTO A/C CONTROL MODULE AND SUNLOAD SENSOR. 
Measure the resistance of the harness between the auto A/C control module and sunload sensor.
Connector & terminal 
(i51) No. 1 - (i88) No. 14: 		 Is the resistance less than 1 Ω? Go to step 4  . Repair the harness between auto A/C control module and sunload sensor.
4 CHECK INPUT VOLTAGE FOR AUTO A/C CONTROL MODULE. 
  1. Connect the connectors of sunload sensor and auto A/C control module.
  2. Turn the ignition switch to ON.
  3. Measure the voltage between connector terminals of auto A/C control module.

    Connector & terminal 

    (i88) No. 16 (+) - (i88) No. 14 (-): 

 Is the voltage between approx. 1.0 - 4.0 V? Go to step 5  . Replace the sunload sensor. < Refer to REMOVAL , Sunload Sensor (Auto A/C Model). >
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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