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In-Vehicle Sensor: 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: In-Vehicle Sensor Wiring Diagram
G05663225Courtesy of SUBARU OF AMERICA, INC.
DIAGNOSTIC PROCEDURE CHART

Step Check Yes No
1 CHECK IN-VEHICLE SENSOR. 
  1. Turn the ignition switch to OFF.
  2. Remove the driver's side lower cover.
  3. Disconnect the connector from in-vehicle sensor.
  4. Measure the resistance between terminals of in-vehicle sensor.

    Terminals 

    No. 1 - No. 2: 

 Is the resistance approximately 2.2 kΩ at 25°C (77°F)? Go to step 2  . Replace the in-vehicle sensor. < Ref. to REMOVAL , In-Vehicle Sensor (Auto A/C Model). >
2 CHECK INPUT SIGNAL FOR IN-VEHICLE SENSOR. 
  1. Turn the ignition switch to ON.
  2. Measure the voltage between in-vehicle sensor harness connector terminals.

    Connector & terminal 

    (i55) No. 2 (+) - No. 1 (-): 

 Is the voltage approx. 5 V? Go to step 6  . Go to step 3  .
3 CHECK AUTO A/C CONTROL MODULE OUTPUT SIGNAL. 
  1. Turn the ignition switch to OFF.
  2. Remove the auto A/C control module.
  3. Turn the ignition switch to ON.
  4. Measure the voltage between connector terminals of auto A/C control module.

    Connector & terminal 

    (i88) No. 17 (+) - (i88) No. 14 (-): 

 Is the voltage approx. 5 V? Go to step 4  . Go to step 6  .
4 CHECK HARNESS BETWEEN AUTO A/C CONTROL MODULE AND IN-VEHICLE SENSOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from the auto A/C control module.
  3. Measure the resistance of harness between auto A/C control module and in-vehicle sensor.

    Connector & terminal 

    (i55) No. 2 - (i88) No. 17: 

 Is the resistance less than 1 Ω? Go to step 5  . Repair the harness between auto A/C control module and in-vehicle sensor.
5 CHECK HARNESS BETWEEN AUTO A/C CONTROL MODULE AND IN-VEHICLE SENSOR. 
Measure the resistance of harness between auto A/C control module and in-vehicle sensor.
Connector & terminal 
(i55) No. 1 - (i88) No. 14: 		 Is the resistance less than 1 Ω? Go to step 6  . Repair the harness between auto A/C control module and in-vehicle sensor.
6 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). >
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