Mazda MPV 1999-06

Throttle Position Sensor

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Operation



The TPS is a variable resistor. As the accelerator pedal is depressed and released, the resistance inside the sensor changes. The computer uses this reading to determine proper air/fuel mixture and ignition timing settings.

Removal & Installation



  1. Disconnect the negative battery cable.
  2.  
  3. Remove the necessary air intake components to access the TPS.
  4.  
  5. Detach the electrical wire harness plug from the sensor.
  6.  
  7. Paint an alignment mark on the sensor housing to the throttle body.
  8.  
  9. Remove the sensor attaching bolts.
  10.  
  11. Remove the sensor from the throttle body.
  12.  
  13. Installation is the reverse of the removal procedure.
  14.  

Testing



  1. Verify that the throttle valve is at the closed throttle position.
  2.  
  3. Disengage the wiring harness connector from the TP sensor.
  4.  
  5. Using a Digital Volt-Ohmmeter (DVOM) set on ohmmeter function, probe terminals C and D on the TP sensor.
  6.  
  7. Insert a 0.020 inch (0.50mm) feeler gauge between the throttle adjusting screw and the throttle lever. Verify that there is no continuity.
  8.  
  9. If there is no continuity, adjust the TPS as follows:
    1. Loosen the TPS mounting screws.
    2.  
    3. Insert a feeler gauge between the throttle adjusting screw and the throttle lever.
    4.  
    5. There should be continuity when inserting a 0.006 inch (0.15mm) feeler gauge and there should be NO continuity when inserting a 0.020 inch (0.50mm) feeler gauge.
    6.  
    7. Tighten the mounting screws.
    8.  

  10.  
  11. Replace the TPS if not as specified.
  12.  

 
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