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Oil Pressure Switch Test

WARNING: This page is about a different car, the 2008 Acura TSX, 2007 Acura TSX, 2006 Acura TSX, 2005 Acura TSX, and 2004 Acura TSX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the YEL/RED wire (A) from the oil pressure switch (B).
    Fig 1: Identifying YEL/RED Wire And Oil Pressure Switch
    G05490244Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Check for continuity between the positive terminal (C) and the engine (ground). There should be continuity with the engine stopped. There should be no continuity with the engine running.
  3. If the switch fails to operate, check the engine oil level. If the engine oil level is OK, check the engine oil pressure. If the oil pressure is OK, replace the oil pressure switch (see OIL PRESSURE SWITCH REPLACEMENT  ).
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