Toyota Camry 1983-1996 Repair Guide

Throttle Position Sensor

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OPERATION



The Throttle Position (TP) sensor measures how far the throttle valve is open. Used in conjunction with the MAP or MAF sensors, it helps determine engine load.

TESTING



See Figures 1 thru 20

  1. Unplug the TP sensor connector.
  2.  
  3. For the 2S-ELC engine, make an angle gauge as shown in the illustration.
  4.  
  5. Except for the 2S-ELC engine, apply vacuum to the throttle opener.
  6.  
  7. Insert a thickness gauge between the throttle stop screw and the stop lever.
  8.  
  9. Using an ohmmeter, measure the applicable value between each terminal. Compare the readings to the appropriate chart.
  10.  
  11. Reconnect the sensor wiring.
  12.  



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Fig. Fig. 1: Disconnect the TPS sensor wiring



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Fig. Fig. 2: Fabricate an angle gauge as shown



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Fig. Fig. 3: Disconnect the hose form the throttle opener ... .



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Fig. Fig. 4: ... and apply vacuum



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Fig. Fig. 5: Check the TPS for resistance without a gauge first-1MZ-FE engine



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Fig. Fig. 6: Insert a thickness gauge between the throttle stop screw and lever



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Fig. Fig. 7: Insert a 0.14 inch (0.35mm) gauge and check the reading-1MZ-FE engine



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Fig. Fig. 8: Next insert a 0.28 inch (0.70mm) gauge and check for an infinite reading-1MZ-FE engine



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Fig. Fig. 9: Holding the throttle fully open test the VTA and E2 terminals for resistance-1MZ-FE engine



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Fig. Fig. 10: Next test the TPS terminals VC and E2 and check for resistance between 2.7-7.7 kilo ohms



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Fig. Fig. 11: Check for resistance between the terminals indicated-2S-ELC engine



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Fig. Fig. 12: Throttle position sensor resistance chart-2S-ELC engine



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Fig. Fig. 13: Check for resistance between the terminals indicated-3S-FE engine with ECT



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Fig. Fig. 14: Throttle position sensor resistance chart-3S-FE engine with ECT



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Fig. Fig. 15: Check for continuity between the terminals indicated-3S-FE engine without ECT



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Fig. Fig. 16: Throttle position sensor continuity chart-3S-FE engine without ECT



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Fig. Fig. 17: Check for resistance between the terminals indicated-2VZ-FE engine



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Fig. Fig. 18: Throttle position sensor resistance chart-2VZ-FE engine



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Fig. Fig. 19: Check for resistance between the terminals indicated-3VZ-FE, 5S-FE and 1MZ-FE engines



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Fig. Fig. 20: Throttle position sensor resistance chart-3VZ-FE and 1MZ-FE engines



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Fig. Fig. 21: Throttle position sensor resistance chart-5S-FE engine

REMOVAL & INSTALLATION



  1. Remove the mounting screws and extract the sensor.
  2.  

To install:
  1. Make certain the throttle plate is fully closed. With the throttle body held in its normal orientation, place the sensor onto the throttle body so that the electrical connector is in the correct position.
  2.  
  3. Temporarily install the retaining screws for the sensor.
  4.  
  5. Adjust the throttle position sensor.
  6.  

ADJUSTMENT



2S-FE and 3S-FE Without ECT

See Figures 22, 23 and 24

  1. Loosen the sensor screw.
  2.  
  3. Insert a 0.028 inch (0.070mm) feeler gauge between the throttle stop screw and lever.
  4.  



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Fig. Fig. 22: Adjusting the TPS using an ohmmeter and feeler gauge (first pass)-2S-FE and 3S-FE without ECT

  1. Connect an ohmmeter to terminals IDL and E1.
  2.  
  3. Gradully turn the sensor counterclockwise until the ohmmeter deflects and then tighten the screws.
  4.  
  5. Using a 0.020 inch (0.050mm) feeler gauge between the throttle stop and lever, verify with an ohmmeter that there is continuity.
  6.  
  7. Using a 0.0354 inch (0.090mm) feeler gage between the throttle stop screw and lever, verify with an ohmmeter that there is not continuity.
  8.  



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Fig. Fig. 23: Adjusting the TPS using an ohmmeter and feeler gauge (second pass)-2S-FE and 3S-FE without ECT

  1. If non of the test is as specified, replace the sensor.
  2.  



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Fig. Fig. 24: Continuity chart for adjusting the TPS-2S-ELC and 3S-FE without ECT

3S-FE With ECT

See Figures 25, 26 and 27

This procedure is for vehicles with 3S-FE and Electronic Controlled Transmission.

  1. Loosen the sensor screws. Apply vacuum to the throttle opener, if equipped.
  2.  
  3. Insert a 0.024 inch (0.060mm) feeler gauge between the throttle stop screw and lever.
  4.  



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Fig. Fig. 25: Adjusting the TPS using an ohmmeter and feeler gauge-3S-FE with ECT

  1. Connect an ohmmeter to terminals IDL and E2 of the sensor.
  2.  
  3. Gradually turn the sensor clockwise until the ohmmeter deflects and then tighten the screws.
  4.  
  5. Using a 0.020 inch (0.050mm) feeler gauge between the throttle stop and lever, verify with an ohmmeter that there is continuity.
  6.  
  7. Using a 0.028 inch (0.070mm) feeler gage between the throttle stop screw and lever, verify with an ohmmeter that there is not continuity.
  8.  



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Fig. Fig. 26: Adjusting the TPS using an ohmmeter and feeler gauge-3S-FE with ECT



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Fig. Fig. 27: Continuity chart for adjusting the TPS-3S-FE with ECT

5S-FE Engine
  1. Loosen the sensor screws. Apply vacuum to the throttle opener, if equipped.
  2.  
  3. Insert a 0.024 inch (0.060mm) feeler gauge between the throttle stop screw and lever.
  4.  
  5. Connect an ohmmeter to terminals IDL and E2 of the sensor.
  6.  
  7. Gradually turn the sensor clockwise until the ohmmeter deflects and then tighten the screws.
  8.  
  9. Using a 0.020 inch (0.050mm) feeler gauge between the throttle stop and lever, verify with an ohmmeter that there is continuity.
  10.  
  11. Using a 0.030 inch (0.070mm) feeler gage between the throttle stop screw and lever, verify with an ohmmeter that there is not continuity.
  12.  
  13. If non of the test is as specified, replace the sensor.
  14.  

1MZ-FE Engine

See Figure 28



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Fig. Fig. 28: TPS terminal harness identification-1MZ-FE engine

  1. Loosen the sensor screws. Apply vacuum to the throttle opener, if equipped.
  2.  
  3. Insert a 0.021 inch (0.054mm) feeler gauge between the throttle stop screw and lever.
  4.  
  5. Connect an ohmmeter to terminals IDL and E2 of the sensor.
  6.  
  7. Gradually turn the sensor clockwise until the ohmmeter deflects and then tighten the screws.
  8.  
  9. Using a 0.014 inch (0.035mm) feeler gauge between the throttle stop and lever, verify with an ohmmeter that there is continuity.
  10.  
  11. Using a 0.030 inch (0.070mm) feeler gauge between the throttle stop screw and lever, verify with an ohmmeter that there is not continuity.
  12.  

 
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