Suzuki Esteem, Swift 1994-02

Oil Pressure Sensor

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Removal & Installation



  1. Disconnect the negative battery cable.
  2.  
  3. Drain the engine oil.
  4.  
  5. Disconnect the oil pressure switch electrical connector.
  6.  
  7. Remove the switch from the cylinder block.
  8.  

To install:

  1. Coat the sending unit threads with sealant and install in the cylinder block.
  2.  
  3. Connect the oil pressure switch electrical connector.
  4.  
  5. Fill the engine with oil.
  6.  
  7. Connect the negative battery cable.
  8.  

Testing



To test when the indicator lamp does not illuminate.

  1. Turn ON the ignition switch.
  2.  
  3. If the lamp does not illuminate, check for an open in the oil pressure sensor circuit.
  4.  
  5. If the circuit checks out to be good, disconnect the wire from the sensor and using a jumper wire, ground the wire.
  6.  
  7. If the lamp illuminates, check the sensor for a good ground. If necessary, replace the sensor.
  8.  
  9. If the lamp does not illuminate, check for a burnt out bulb or disconnected socket in the instrument cluster.
  10.  

To test when the indicator lamp does not go out.

  1. Check the oil level and top off as needed.
  2.  
  3. If the engine was low on oil, test start the engine and check to see if the lamp goes out. If the lamp stays on, immediately stop the engine and go to the next step.
  4.  
  5. Disconnect the wire from the oil pressure sensor. If the lamp stays illuminated, check the harness for a short to ground. If the lamp goes out, go to the next step.
  6.  
  7. Replace the oil pressure sensor.
  8.  
  9. Start the engine and check the indicator lamp. If the lamp still has not gone out, immediately stop the engine to avoid severe damage.
  10.  
  11. Check for the possible causes:

    Pinched or grounded sensor wire.
     
    Defective oil pressure sending unit.
     
    Restricted or severely leaking oil filter.
     
    Excessive internal engine bearing clearance.
     
    Insufficient or severely contaminated engine oil.
     
    Blocked oil pump pickup screen or severely worn oil pump.
     

  12.  

 
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