Toyota Matrix 2003-06

Throttle Body

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Removal & Installation



1ZZ-FE Engine
  1. Remove the 2 nuts and the 2 retainers from the engine cover.
  2.  
  3. Remove the cylinder head cover.
  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.
  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. To install:
  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.
  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 and tighten 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 and tighten 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 cylinder head cover.

    Click image to see an enlarged view

    Fig. Throttle body assembly-1ZZ-FE engine

    Throttle body assembly-1ZZ-FE engine
  58.  

2zz-FE Engine


Click image to see an enlarged view

Fig. Throttle body assembly-2ZZ-FE engine

Throttle body assembly-2ZZ-FE engine
  1. Disconnect the negative battery cable.
  2.  
  3. Drain and recycle the engine coolant.
  4.  
  5. Remove the 4 fasteners from the engine cover.

    Click image to see an enlarged view

    Fig. Remove the 4 fasteners from the engine cover .

    Remove the 4 fasteners from the engine cover .
  6.  
  7. Remove the cylinder head cover.
  8.  
  9. Remove the throttle cable from the cable support, loosen the nut and disconnect the cable end from the throttle lever to separate the control cable.
  10.  
  11. Disconnect all hoses and wires from the air cleaner cover and hose and remove the cover along with the hose.
  12.  
  13. Remove the throttle position (TP) sensor connector.
  14.  
  15. Disconnect the electrical connector of the idle speed control (ISC) valve.
  16.  
  17. Disconnect the ventilation hose from the throttle body.
  18.  
  19. Remove the 2 coolant hoses from the throttle body.
  20.  
  21. Remove the 2 throttle body nuts and the accelerator control cable bracket.
  22.  
  23. Remove the 2 throttle body bolts.
  24.  
  25. Remove the throttle body and the gasket from the intake manifold.
  26.  
  27. Clean the gasket mating surfaces.
  28.  

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.
  6.  
  7. Tighten the 4 throttle body fasteners. Tighten the fasteners to 16 ft. lbs. (22 Nm).
  8.  
  9. Install the remaining components in the reverse order of removal.
  10.  
  11. Install the air inlet duct.
  12.  

 
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