Mazda Car 2002-04

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.

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.

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.

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.

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.

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.  

  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.  

  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.  

  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.  

  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.  

  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



2.0L Engine
Automatic Transaxle
  1. Detach the connector from the TPS.
  2.  
  3. Connect an ohmmeter between the terminals IDL and E.
  4.  
  5. Insert a 0.004 in. (0.1mm) feeler gauge between the throttle stop screw and stop lever.
  6.  
  7. Verify there is continuity between terminals IDL and E.
  8.  
  9. Insert a 0.024 in. (0.6mm) feeler gauge between the throttle stop screw and stop lever.
  10.  
  11. Verify there is no continuity between terminals IDL and E.
  12.  
  13. Connect an ohmmeter to the throttle sensor terminals Vt and E.
  14.  
  15. Verify that resistance increases as throttle valve opening increase.
  16.  
  17. With throttle valve fully closed the resistance should be below 1 kohm and as throttle valve is fully opened resistance should increase to approximately 5 kohms.
  18.  
  19. If not as specified, adjust or replace the throttle sensor.
  20.  

Manual Transaxle
  1. Detach the connector from the TPS.
  2.  
  3. Connect an ohmmeter between terminals IDL and E.
  4.  
  5. Insert a 0.004 in. (0.1mm) feeler gauge between the throttle stop screw and stop lever.
  6.  
  7. Verify there is continuity between terminals IDL and E.
  8.  
  9. Then replace the feeler gauge with a 0.027 in. (0.7mm) feeler gauge, verify there is no continuity between terminals IDL and E
  10.  
  11. Then open the throttle wide and verify there is no continuity again between terminals IDL and E.
  12.  
  13. Next, connect the ohmmeter between terminals POW and E.
  14.  
  15. Insert a 0.004 in. (0.1mm) feeler gauge between the throttle stop screw and stop lever.
  16.  
  17. Verify there is no continuity between terminals POW and E.
  18.  
  19. Then replace the feeler gauge with 0.027 in (0.7mm), verify there is no continuity between terminals POW and E.
  20.  
  21. Then open the throttle wide and verify there is continuity between terminals POW and E.
  22.  
  23. If not as specified, adjust or replace the throttle
  24.  

2.2L Engine
  1. Remove the air hose from the throttle body.
  2.  
  3. Detach the 3-pin throttle sensor connector.
  4.  
  5. Connect the 49-G018-901 testing harness or equivalent between the throttle sensor and the wiring harness.
  6.  
  7. Turn the ignition switch ON .
  8.  
  9. Verify the throttle valve is fully closed.
  10.  
  11. Measure the voltage at the black and the red wires of the testing harness using a precision voltmeter with a scale of 0.01 volts, the voltage at the black wire should be approximately 0 volts and the voltage at the red wire should be 4.5-5.5 volts.
  12.  
  13. If the voltage reading is not as specified, check the battery voltage and wiring harness, if these are okay, replace the engine control unit.
  14.  
  15. Record the red wire voltage.
  16.  
  17. Measure the voltage of the blue wire, verify that the blue wire voltage is within specification according to the red wire voltage. For example; if the red wire voltage reading is 4.50-4.59 volts, then the blue wire voltage reading would have to be within 0.37-0.54 volts.
  18.  
  19. Hold the throttle valve fully open.
  20.  
  21. Measure the blue wire voltage, verify that the blue wire voltage is within specification according to that of the red wire voltage. For example; if the red wire voltage reading is 4.50-4.59 volts, then the blue wire voltage reading would have to be within 3.58-4.23 volts.
  22.  
  23. Check that blue wire voltage increases smoothly when opening the throttle valve from closed to fully open.
  24.  
  25. If the throttle sensor does not perform as specified, adjust or replace the sensor.
  26.  
  27. Turn the ignition OFF .
  28.  
  29. Detach the testing harness and reattach the throttle sensor connector.
  30.  
  31. Disconnect the negative battery terminal and depress the brake pedal for at least 5 seconds to eliminate the control unit malfunction memory.
  32.  

2.3L L4
  1. Turn the ignition switch to ON position (Engine OFF).
  2.  
  3. Measure voltage between the PCM terminal 3M and ground Standard value:
    1. Closed throttle-0.40-0.60 volts.
    2.  
    3. Wide open throttle-4.25-4.75 volts.
    4.  

  4.  
  5. Measure voltage between the PCM terminal 3J and ground. Standard value:
    1. Closed throttle-4.40-4.60 volts
    2.  
    3. Wide open throttle-0.25-0.75 volts.
    4.  

  6.  
  7. If within specifications, check wiring and/or connectors and repair/replace as necessary.
  8.  
  9. If not within specifications, replace the throttle body.
  10.  

3.0L V6
  1. Connect a suitable scan tool to the diagnostic connector.
  2.  
  3. Turn the ignition switch to ON position.
  4.  
  5. Monitor TP1 and TP2 percentage values. Standard value:
    1. TP1 Closed throttle-83.04-91.54 %.
    2.  
    3. TP1 Wide open throttle-5.84-25.62 %.
    4.  
    5. TP2 Closed throttle-6.16-21.26 %.
    6.  
    7. TP2 Wide open throttle-84.54-92.96 %.
    8.  

  6.  
  7. If within specifications, check wiring and/or connectors and repair/replace as necessary.
  8.  
  9. If not within specifications, replace the throttle body.

    Click image to see an enlarged view

    Fig. Throttle position sensor connector

  10.  

Automatic Transaxle
  1. Detach the connector from the TPS.
  2.  
  3. Connect an ohmmeter between terminals IDL and E.
  4.  
  5. Insert a 0.004 in. (0.1mm) feeler gauge between the throttle stop screw and stop lever.
  6.  
  7. Verify there is continuity between terminals IDL and E.
  8.  
  9. Insert a 0.024 in. (0.6mm) feeler gauge between the throttle stop screw and stop lever.
  10.  
  11. Verify there is continuity no between terminals IDL and E.
  12.  
  13. Connect an ohmmeter to the throttle sensor terminals Vt and E.
  14.  
  15. Verify that resistance increases as throttle valve opening increase.
  16.  
  17. With throttle valve fully closed the resistance should be below 1 kohm and as throttle valve is fully opened resistance should increase to approximately 5 kohms.
  18.  
  19. If not as specified, adjust or replace the throttle sensor.
  20.  

Manual Transaxle
  1. Detach the connector from the TPS.
  2.  
  3. Connect an ohmmeter between terminals IDL and E.
  4.  
  5. Insert a 0.004 in. (0.1mm) feeler gauge between the throttle stop screw and stop lever.
  6.  
  7. Verify there is continuity between terminals IDL and E.
  8.  
  9. Then replace the feeler gauge with a 0.039 in. (1.0mm) feeler gauge, verify there is no continuity between terminals IDL and E .
  10.  
  11. Open the throttle wide and verify there is no continuity again between terminals IDL and E.
  12.  
  13. Next, connect the ohmmeter between terminals POW and E.
  14.  
  15. Insert a 0.004 in. (0.1mm) feeler gauge between the throttle stop screw and stop lever.
  16.  
  17. Verify there is no continuity between terminals POW and E.
  18.  
  19. Replace the feeler gauge with 0.039 in. (1.0mm), verify there is no continuity between terminals POW and E.
  20.  
  21. Open the throttle wide and verify there is continuity between terminals POW and E.
  22.  
  23. If not as specified, adjust or replace the throttle sensor.
  24.  

 
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