Acura_MDX_2001-2006

Throttle Body

Print

Removal & Installation



2001-02 Models
  1. Refer to the accompanying illustration for throttle body removal and installation
    NOTE
    Do not adjust the throttle stop screw.



    Click image to see an enlarged view

    Fig. Exploded view of the throttle body and related components-2001-02 models

  2.  
  3. After installation, adjust the cruise control cable, as follows:
    1. Check that the actuator cable (A) moves smoothly with no binding or sticking.
    2.  
    3. Measure the amount of movement of the output linkage (B) until the engine speed starts to increase. At first, the output linkage should be located at the fully closed position (C). The free play (D) should be 0.13-0.17 in. (3.7-3.8mm).

      Click image to see an enlarged view

      Fig. Check that the actuator cable (A) moves smoothly with no binding or sticking. Measure the amount of movement of the output linkage (B) until the engine speed starts to increase. At first, the output linkage should be located at the fully closed position (C). The free play (D) should be 0.13-0.17 in. (3.7-3.8mm)

    4.  
    5. If the free play is not within specs, move the cable to the point where the engine speed starts to increase, and tighten the locknut (A) and adjusting nut (B).

      Click image to see an enlarged view

      Fig. If the free play is not within specs, move the cable to the point where the engine speed starts to increase, and tighten the locknut (A) and adjusting nut (B)

    6.  
    7. Turn the adjusting nut (A) until it is 0.13-0.17 in. (3.7-3.8mm) away from the bracket (B).

      Click image to see an enlarged view

      Fig. Turn the adjusting nut (A) until it is 0.13-0.17 in. (3.7-3.8mm) away from the bracket (B)

    8.  
    9. Pull the cable so that the adjusting nut (A) touches the bracket, and tighten the locknut (B).

      Click image to see an enlarged view

      Fig. Pull the cable so that the adjusting nut (A) touches the bracket, and tighten the locknut (B)

    10.  

  4.  
  5. After installation, adjust the throttle cable, as follows:
    1. Hold the throttle link (A) to the throttle lever (B).There should be no clearance.

      Click image to see an enlarged view

      Fig. Hold the throttle link (A) to the throttle lever (B).There should be no clearance

    2.  
    3. Check cable free play at the throttle linkage. Cable deflection (A) should be 3 / 8 - 1 / 2 in. (10-12mm).
    4.  
    5. If deflection is not within specs, loosen the locknut (B), turn the adjusting nut (C) until the deflection is as specified, then retighten the locknut.

      Click image to see an enlarged view

      Fig. Check cable free play at the throttle linkage. Cable deflection (A) should be 3/8-1/2 in. (10-12mm). If deflection is not within specs, loosen the locknut (B), turn the adjusting nut (C) until the deflection is as specified, then retighten the locknut

    6.  
    7. With the cable properly adjusted, check the throttle valve to be sure it opens fully when you push the accelerator pedal to the floor. Also check the throttle valve to be sure it returns to the idle position whenever you release the accelerator pedal.
      NOTE
      The Throttle Position (TP) sensor is not removable or adjustable.

    8.  

  6.  

2003-06 Models

NOTE
Anytime you remove or replace the throttle body, you will need a suitable scan tool to perform an Idle Learn procedure.


CAUTION
Do not insert your fingers into the installed throttle body when you turn the ignition switch ON (II) or while the ignition switch is ON (II). If you do, you will seriously injure your fingers if the throttle valve is activated.


NOTE
If you are replacing the throttle body, begin at step 1. If you are removing the throttle body temporarily, begin at step 4.

  1. Connect the HDS while the engine is stopped.
  2.  
  3. Select the INSPECTION MENU with the HDS.
  4.  
  5. Do the TP POSITION CHECK in the ETCS TEST.
  6.  
  7. Disconnect the MAP sensor connector (A).
  8.  
  9. Remove the intake air duct.
  10.  
  11. Disconnect the throttle body connector (B).
  12.  
  13. Disconnect the water bypass hoses (C), and plug the water bypass hoses.
  14.  
  15. Remove the throttle body (D).
  16.  
  17. Clean the throttle body and intake manifold surface.

    Click image to see an enlarged view

    Fig. View of the MAP sensor connector (A), throttle body connector (B), water bypass hoses (C), throttle body (D) and gasket (E)-2003-06 models

  18.  

To install:

  1. Installation is the reverse of the removal procedure. Make sure to use a new gasket (E). Tighten the throttle body mounting bolts to 16 ft. lbs. (22 Nm).
    NOTE
    The idle learn procedure must be done so the PCM can learn the engine idle characteristics. Perform the idle learn procedure whenever you do any of these actions: Replace PCM, Reset PCM, Update PCM or Replace or clean the throttle body.

  2.  
  3. Perform the PCM idle learn procedure, as follows:
    NOTE
    Erasing DTCs with the HDS does not require you to do the idle learn procedure.

    1. Make sure all electrical items (A/C, audio, rear window defogger, lights, etc.) are off.
    2.  
    3. Reset the PCM with the HDS.
    4.  
    5. Turn the ignition switch ON (II), and wait 2 seconds.
    6.  
    7. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, or until the engine coolant temperature reaches 194 ºF (90 ºC).
    8.  
    9. Let the engine idle for about 5 minutes with the throttle fully closed.
      NOTE
      If the radiator fan comes on, do not include its running time in the 5 minutes.

    10.  

  4.  
  5. Refill the engine with coolant.
  6.  

 
label.common.footer.alt.autozoneLogo