Toyota Camry and Avalon 1997-2000

Oil Pressure Switch (Sender)

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TESTING


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Fig. Location of the oil pressure switch-1MZ-FE engine

A quick way to determine if the gauge (idiot light) or sending unit is faulty is to disconnect the sending unit electrical harness and ground it (if two terminal, jumper between the terminals). If the gauge responds, the sending unit may be faulty. Proceed with the sending unit test.

  1. Disconnect the sending unit electrical harness.
  2.  
  3. Using an ohmmeter, check continuity between the sending unit terminals (sending unit terminal and ground).
  4.  
  5. With the engine stopped, continuity should exist.
  6.  
  7. With the engine running, continuity should not exist.
  8.  
  9. If continuity does not exist as stated, the sending unit is faulty.
  10.  

REMOVAL & INSTALLATION


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Fig. Always apply a thread sealant before re-installing it into the engine

  1. Turn the ignition key to the OFF position.
  2.  
  3. Locate the oil pressure-sending unit on the engine.
  4.  
  5. Disconnect the sending unit electrical harness.
  6.  
  7. Unfasten and remove the sending unit from the engine.
  8.  

To install:

  1. Coat the new sending unit with Teflon®tape or electrically conductive sealer.
  2.  
  3. Install the sending unit and secure.
  4.  
  5. Attach the sending unit's electrical connector.
  6.  
  7. Start the engine, allow it to reach operating temperature and check for leaks.
  8.  
  9. Check for proper sending unit operation.
  10.  

 
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