Toyota Corolla 1988-1997 Repair Guide

Throttle Opener

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TESTING



See Figures 1 and 2

  1. Apply vacuum to the throttle opener.
  2.  
  3. Insert a feeler gauge between the throttle stop screw and stop lever.
  4.  
  5. Using an ohmmeter, measure the resistance between each terminal.
  6.  



Click image to see an enlarged view

Fig. Fig. 1: Check for resistance between these two terminals of the throttle position sensor

  1. If necessary, adjust the TP sensor.
    1. Apply vacuum to the throttle opener. Insert a 0.028 inch (0.70mm) feeler gauge between the throttle stop screw and stop lever.
    2.  
    3. Connect the test probe of an ohmmeter to the terminals IDL and E2 of the TP sensor.
    4.  

  2.  
  3. Gradually turn the TP sensor clockwise until the ohmmeter deflects, and secure it with the set screws.
  4.  
  5. Recheck the continuity between terminals IDL and E2.
  6.  



Click image to see an enlarged view

Fig. Fig. 2: Throttle position sensor continuity chart

 
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