Vibe 2006-2007

Throttle Position Sensor

Print

Operation



The TP sensor used with the throttle actuator control (TAC) system is actually a Hall Effect switch. The Hall Effect switch is surrounded by a magnetic yoke that induces a flux in the magnetic field when the throttle shaft is rotated. The PCM provides a 5-volt reference voltage to the sensor circuits in the TAC module. An integrated circuit (IC) receives and converts the magnetic pulses into two separate TP signal, each with their own characteristics. Both TP sensor signal voltages are low at closed throttle and increase as the throttle opens. TP sensor 1 determines the actual throttle valve position. TP sensor 2 has a voltage that is more than twice that of TP sensor 1 at idle. TP sensor 2 provides a backup value for TP sensor 1.

Removal & Installation



1ZZ-FE Engine
  1. Remove the 2 nuts and the 2 retainers from the engine cover.
  2.  
  3. Remove the engine cover from the engine.

    Click image to see an enlarged view

    Fig. Remove the 2 nuts and the 2 retainers from the engine cover (1).

  4.  
  5. Remove the air inlet duct from the throttle body assembly.
  6.  
  7. Remove the positive crankcase ventilation (PCV) breather hose.
  8.  
  9. Remove the throttle position (TP) sensor connector.
  10.  
  11. Rotate the throttle lever and disconnect the accelerator cable and the throttle valve cable, if equipped.
  12.  
  13. Disconnect the electrical connector of the idle air control (IAC) valve.
  14.  
  15. Drain the cooling system.
  16.  
  17. Remove the 2 coolant hoses from the throttle body.

    Click image to see an enlarged view

    Fig. Exploded view of throttle body and components-1ZZ-FE

  18.  
  19. Remove the 2 bolts and the accelerator control cable bracket.
  20.  
  21. Remove the 2 fasteners and the throttle body bracket.
  22.  
  23. Remove the 3 throttle body fasteners.
  24.  
  25. Remove the 2 fasteners and the manifold support bracket.
  26.  
  27. Remove the throttle body and the gasket from the intake manifold.
  28.  
  29. Clean any remaining throttle body gasket from the intake manifold.

    Click image to see an enlarged view

    Fig. Remove the following components



    Click image to see an enlarged view

    Fig. Install a new throttle body gasket (1) onto the intake manifold (2).

  30.  
  31. Install a new throttle body gasket onto the intake manifold.
  32.  
  33. Install the throttle body onto the intake manifold with the 3 fasteners.
  34.  
  35. Install the throttle body bracket and the 2 bolts to the throttle body.
    NOTE
    Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  36.  
  37. Install the 5 throttle body fasteners. Tighten the fasteners to 22 ft. lbs. (30 Nm).
  38.  
  39. Install the manifold support bracket to the throttle body with 2 bolts. Install the 2 fasteners. Tighten the fasteners to 22 ft. lbs. (30 Nm).
  40.  
  41. Install the accelerator control cable bracket to the throttle body with 2 bolts. Install the 2 fasteners. Tighten the fasteners to 10 ft. lbs. (13 Nm).
  42.  
  43. Connect the 2 coolant hoses to the throttle body.
  44.  
  45. Connect the PCV breather hose to the throttle body.
  46.  
  47. Connect the IAC valve electrical connector.
  48.  
  49. Connect the TP sensor electrical connector.
  50.  
  51. Install the air inlet duct.
  52.  
  53. Refill the cooling system.
  54.  
  55. Install the engine cover to the engine and secure engine cover with the 2 nuts. Secure the engine cover with the 2 nuts. Tighten the fasteners to 62 inch lbs (7 Nm).
  56.  
  57. Install the 2 retainers to the engine cover.
  58.  

2ZZ-GE Engine
  1. Remove the 4 fasteners from the engine cover.

    Click image to see an enlarged view

    Fig. Remove the 4 fasteners from the engine cover (1).

  2.  
  3. Remove the engine cover from the engine.

    Click image to see an enlarged view

    Fig. Exploded view of throttle body and components

  4.  
  5. Remove the air inlet duct from the throttle body assembly.
  6.  
  7. Remove the positive crankcase ventilation (PCV) breather hose.
  8.  
  9. Remove the throttle position (TP) sensor connector.
  10.  
  11. Rotate the throttle lever and disconnect the accelerator cable and the throttle valve cable, if equipped.
  12.  
  13. Disconnect the electrical connector of the idle air control (IAC) valve.
  14.  
  15. Drain the cooling system.
  16.  
  17. Remove the 2 coolant hoses from the throttle body.

    Click image to see an enlarged view

    Fig. Exploded view of throttle body

  18.  
  19. Remove the 2 throttle body nuts and the accelerator control cable bracket.
  20.  
  21. Remove the 2 throttle body bolts.
  22.  
  23. Remove the throttle body and the gasket from the intake manifold.

    Click image to see an enlarged view

    Fig. Clean any remaining throttle body gasket (1) from the intake manifold.

  24.  
  25. Clean any remaining throttle body gasket from the intake manifold.
  26.  

To install:

  1. Install a new throttle body gasket.
  2.  
  3. Install the throttle body onto the intake manifold with the 2 bolts.
  4.  
  5. Install the accelerator cable bracket and the 2 nuts to the throttle body.
    NOTE
     Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  6.  
  7. Tighten the 4 throttle body fasteners. Tighten the fasteners to 16 ft. lbs. (22 Nm).
  8.  
  9. Connect the 2 coolant hoses to the throttle body.
  10.  
  11. Connect the PCV breather hose to the throttle body.
  12.  
  13. Connect the IAC valve electrical connector.
  14.  
  15. Connect the TP sensor electrical connector.
  16.  
  17. Install the air inlet duct.
  18.  
  19. Refill the cooling system.
  20.  
  21. Install the engine cover to the engine.
  22.  
  23. Secure the engine cover with the 4 fasteners. Tighten the fasteners to 62 inch lbs. (7 Nm).
  24.  

Testing



  1. Turn OFF the ignition.
  2.  
  3. Disconnect the throttle body harness connector.
  4.  
  5. Turn ON the ignition, with the engine OFF.
  6.  
  7. Measure the voltage from the 5 volt reference circuit of the TP sensor to a good ground. The voltage should be 4.9-5.1 volts. If not check sensor 5-volt reference circuit for an open, short to ground of high resistance and repair as needed.
  8.  
  9. Connect a fused jumper wire between the 5 volt reference circuit and the signal circuit of TP sensor. The voltage should be 4.8-5 volts. If not check sensor 5 volt signal circuit for an open, short to ground of high resistance and repair as needed.
  10.  
  11. If the wiring circuits are not defective, replace the throttle body assembly.

    Click image to see an enlarged view

    Fig. Throttle Position Sensor (TPS) sensor terminals

  12.  

 
label.common.footer.alt.autozoneLogo