Protege 1999-2000

Throttle Position Sensor

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Adjustment



Specific to:

Mazda Protege 1998-2003

Mazda Protege5 2002-2003


CAUTION
The TP sensor is adjusted at the factory before shipment. Unnecessary adjustment will negatively affect the engine performance. Adjusting the TP sensor using the throttle adjusting screw (TAS) will negatively affect the engine performance.

Operation



Specific to:

Mazda Protege 1999-2003

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



Specific to:

Mazda Protege 1999-2003

  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



Automatic Transaxle

Specific to:

Mazda Protege 1999-2003

  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.  

Circuit Open/Short Inspection

Specific to:

Mazda Protege 1998-2003

Mazda Protege5 2002-2003

  1. Remove the PCM. See -Powertrain Control Module (PCM)- in this section.
  2.  
  3. Connect the 104-Pin Breakout Box to the PCM as shown, using the vehicle harness connector.
  4.  
  5. Tighten the connector attaching screw to 70-95 inch lbs. (8-10 Nm).
  6.  
  7. Inspect for an open or short circuit in the following wiring harnesses by probing the applicable sensor and SST (104 Pin Breakout Box) terminals with ohmmeter leads.
    1. If there is an open or short circuit, repair or replace wiring harnesses.
    2.  
    3. If there is no open or short circuit, replace the TP sensor.
    4.  

  8.  
  9. To check for open circuit:

    Constant voltage circuit (TP sensor connector terminal A and PCM connector terminal 90)
     
    TP signal circuit (TP sensor connector terminal C and PCM connector terminal 89)
     
    GND circuit (TP sensor connector terminal B and PCM connector terminal 91)
     

  10.  
  11. To check for short circuit:

    Constant voltage circuit (TP sensor connector terminal A and PCM connector terminal 90 to GND)
     
    TP signal circuit (TP sensor connector terminal C and PCM connector terminal 89 to GND)
     

  12.  
  13. Reconnect the TP sensor connector.

    Click image to see an enlarged view

    Fig. Showing the TP sensor harness side connector pin arrangement

  14.  

Manual Transaxle

Specific to:

Mazda Protege 1999-2003

  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.  

Resistance Inspection

Specific to:

Mazda Protege 1998-2003

Mazda Protege5 2002-2003

  1. Verify that the throttle valve is at CTP.
  2.  
  3. Inspect accelerator cable for excessive free play. Adjust if needed.
  4.  
  5. Measure the resistance between TP sensor terminals A and C using an ohmmeter.
    1. If not as specified, replace the TP sensor.
    2.  
    3. If as specified, but PID value or PCM terminal 89 voltage are out of specification, carry out the -Circuit Open/Short Inspection-.
    4.  
    5. Resistance should be 2.5-6.0 k-ohms.

      Click image to see an enlarged view

      Fig. Showing the TP sensor component side connector pin arrangement

    6.  

  6.  

 
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