VW Passat & Audi A4 1990-2000

Throttle Body

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REMOVAL & INSTALLATION

The throttle body is mounted on the intake manifold inlet downstream of the mixture control unit. The function of the throttle valve is to regulate airflow into the engine. The throttle valve is control by the throttle cable. The throttle valve does not control engine idle speed; that is accomplished by the idle stabilizer valve.

1990-93 VW Passat


Click image to see an enlarged view

Fig. Exploded view of the throttle body

For component location identification and assistance with removal of this component, refer to the following appropriate exploded view illustration.

  1. Throttle body
  2.  
  3. If stop screw is blocked, replace the throttle body
  4.  
  5. Gasket
  6.  
  7. Always replace
  8.  
  9. Full throttle switch
  10.  
  11. For vehicles built after 10-90 starting with control unit: 49 states: 8A0 907 404. California: 893 907 404Q
  12.  
  13. Harness connector to CIS-E Motronic control unit (J204)
  14.  
  15. Harness connector
  16.  
  17. For vehicles with automatic transmission only, to automatic transmission control unit
  18.  
  19. Throttle body
  20.  
  21. Idle and full throttle switches are connected in an assembly with the throttle potentiometer.
  22.  
  23. If the top screw is blocked: replace the throttle body
  24.  
  25. Heat shield
  26.  
  27. Throttle potentiometer
  28.  
  29. With integrated idle switch and full throttle switch
  30.  
  31. For vehicles built after 10-90 starting with control unit: 49 states: 8A0 907 404. California: 893 907 404Q
  32.  
  33. Screw
  34.  
  35. Must be turned in al the way
  36.  
  37. Idle speed screw CANNOT be adjusted
  38.  
  39. Idle switch
  40.  
  41. For vehicles built after 10-90 starting with control unit: 49 states: 8A0 907 404. California: 893 907 404Q
  42.  
  43. Checked by self-diagnosis
  44.  

1994-2000 VW Passat and 1996-2000 Audi A4


Click image to see an enlarged view

Fig. Exploded view of the throttle body

For component location identification and assistance with removal of this component, refer to the following appropriate exploded view illustration.

  1. Upper intake manifold
  2.  
  3. First tighten to the lower intake manifold and then to both rear supports
  4.  
  5. Cable duct
  6.  
  7. Torque to 7 ft. lbs. (10 Nm)
  8.  
  9. Support
  10.  
  11. Located between intake manifold upper section and cylinder head
  12.  
  13. Torque to 18 ft. lbs. (25 Nm)
  14.  
  15. Vacuum line
  16.  
  17. Breather hose
  18.  
  19. Hose from EVAP canister purge regulator valve
  20.  
  21. Junction piece
  22.  
  23. Throttle valve control module
  24.  
  25. If replaced, initiate "Basic Setting" function; requires scan tool. Follow designated procedures.
  26.  
  27. 8-pin connector for throttle valve control module
  28.  
  29. Gasket (always replace)
  30.  
  31. Accelerator pedal support bracket
  32.  
  33. Ground (GND) wires
  34.  
  35. Left rear support
  36.  
  37. Between upper intake manifold and cylinder head
  38.  
  39. With engine ground connection
  40.  

 
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