Hyundai_Tucson_2005

Throttle Position Sensor (TPS)

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Operation



The TPS has a variable resistor whose characteristic is the resistance changing according to throttle angle. The ECM supplies a reference of 5 volts to the TPS and the output voltage increases directly with the opening of the throttle valve. The TPS voltage will vary from 0.2-0.8 volt at closed throttle and 4.3-4.8 volts at wide open throttle.

Removal & Installation



  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the sensor connector.
  4.  
  5. Remove the sensor retaining screws. Remove the sensor from its mounting.
  6.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  

Testing



2.0L Engine
  1. Turn the ignition switch to the OFF position.
  2.  
  3. Disconnect the TPS connector.
  4.  
  5. Measure the resistance between terminals 2 and 3 of the TPS.
  6.  
  7. Specification should be 1.6-2.4 kohms at all throttle position.
  8.  
  9. With the connector still disconnected, measure the resistance between terminals 1 and 2.
  10.  
  11. Operate the throttle valve slowly from the idle position to the full open position and check that the resistance changes smoothly in proportion with the throttle valve opening angle.
  12.  
  13. Specification should be 0.71-1.38 kohm at closed throttle valve and 2.2-3.4 kohm at wide open throttle.
  14.  
  15. If within specification, check for poor connection between the PCM and the component.
  16.  
  17. If not, substitute the sensor with a known good component, check for proper operation. If problem corrected replace the sensor.
  18.  

2.7L Engine
  1. Disconnect the sensor connector.
  2.  
  3. Measure the resistance between terminal 1 and terminal 2, (component side).
  4.  
  5. Specification should be 1.6-2.4 kohm, at all throttle positions.
  6.  
  7. Measure the resistance between terminal 2 and terminal 3, (component side).
  8.  
  9. Specification should be 0.71-1.38 kohm, at closed throttle and 2.2-3.4 kohm at wide open throttle.
  10.  
  11. If within specification, check for poor connection between the ECM and the component.
  12.  
  13. If not, substitute the sensor with a known good component, check for proper operation. If problem corrected replace the sensor.
  14.  

 
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