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Oil Pressure System: Inspection

WARNING: This page is about a different car, the 2007 Subaru Outback and 2007 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOMS CHART

Step Check Yes No
1 CHECK COMBINATION METER. 
  1. Turn the ignition switch to ON. (engine OFF)
  2. Check the warning light in the combination meter.
 Does the warning light illuminate? Go to step 2.  Repair or replace the combination meter. <Ref. to INSPECTION , Combination Meter System.>
2 CHECK HARNESS CONNECTOR BETWEEN COMBINATION METER AND OIL PRESSURE SWITCH. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from oil pressure switch.
  3. Turn the ignition switch to ON.
  4. Measure the voltage of harness between oil pressure switch connector and chassis ground.

    Connector & terminal 

    (E11) No. 1 (+) - Chassis ground (-): 

 Is the voltage 10 V or more? Replace the oil pressure switch. Go to step 3  .
3 CHECK COMBINATION METER. 
  1. Turn the ignition switch to OFF.
  2. Remove the combination meter.
  3. Measure the resistance of combination meter.

    Terminals 

    No. 3 - No. 15: 

 Is the resistance less than 10 Ω? Repair the harness and connector.
NOTE: In this case, repair the following item:
  • Open circuit of harness between combination meter and oil pressure switch
  • Poor contact in combination meter connector
  • Poor contact in oil pressure switch connector
  • Poor contact of coupling connector
 Repair or replace the combination meter. <Ref. to INSPECTION , Combination Meter System .>
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