Mazda Car 2005-06

Hydraulic Control Module

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Removal & Installation




NOTE
When replacing the HCU with a new one, configuration procedure must be performed before removing the DSC HU/CM. If configuration is not completed before removing the DSC HU/CM, DTC B2477 will be detected.

  1. Perform ABS configuration as follows:
    1. Turn the ignition switch off.
    2.  
    3. Connect a scan tool to the DLC.
    4.  
    5. Input vehicle information following the directions on the screen of the scan tool.
    6.  
    7. Select -Module programming- from the scan tool menu.
    8.  
    9. Select -Programmable Module Installation-.
    10.  
    11. Select -ABS/TCS-.
    12.  
    13. Clear DTCs using the scan tool, then verify that there is no DTC present.

      Click image to see an enlarged view

      Fig. Exploded view of the anti-lock brake control unit assembly-MX-5 Miata

    14.  

  2.  
  3. Unplug the HCU connector by pulling the lock lever up in the direction of the arrow.

    Click image to see an enlarged view

    Fig. Unplug the HCU connector by pulling the lock lever up in the direction of the arrow-MX-5 Miata

  4.  
  5. Place an match mark on the brake pipes and HCU to mark their locations, this will aid in installation.
  6.  
  7. Apply protective tape to the connector to prevent brake fluid from entering.
  8.  
  9. Remove the brake pipes.
  10.  
  11. Remove the nut and the HCU brake pipe and the HCU.
  12.  

To install:

  1. Installation is the reverse of removal. Refer to the illustration for component location and torque values. Also please note the following:
    1. Align with the mark made before removing the brake pipe and temporarily install the brake pipe to the HCU. Tighten the brake pipe to the torque shown in the illustration tool 49 0259 770B).
      CAUTION
      If the brake pipe is tightened to the specified torque, it may be difficult to install it to the vehicle. Therefore, only temporarily tighten the brake pipe so that it can still be moved.

    2.  

  2.  
  3. Bleed the brake system

    Click image to see an enlarged view

    Fig. Location of HCU master cylinder brake pipe ports-MX-5 Miata

  4.  

  1. Before servicing the vehicle, refer to the precautions section.
    NOTE
    When replacing the HCU with a new one, configuration procedure must be performed before removing the DSC HU/CM. If configuration is not completed before removing the DSC HU/CM, DTC B2477 will be detected.

  2.  
  3. Perform ABS configuration as follows:
    1. Turn the ignition switch off.
    2.  
    3. Connect a scan tool to the DLC.
    4.  
    5. Input vehicle information following the directions on the screen of the scan tool.
    6.  
    7. Select -Module programming- from the scan tool menu.
    8.  
    9. Select -Programmable Module Installation-.
    10.  
    11. Select -ABS/TCS-.
    12.  
    13. Clear DTCs using the scan tool, then verify that there is no DTC present.
    14.  

  4.  
  5. Place an match mark on the brake pipes and HCU to mark their locations, this will aid in installation.
  6.  
  7. Apply protective tape to the connector to prevent brake fluid from entering.
  8.  
  9. Remove the brake pipes.
  10.  
  11. Remove the nut and the HCU brake pipe and the HCU.
  12.  

To install:

  1. Installation is the reverse of removal. Refer to the illustration for component location and torque values. Also please note the following:
    1. Align with the mark made before removing the brake pipe and temporarily install the brake pipe to the HCU. Tighten the brake pipe to the torque shown in the illustration tool 49 0259 770B).
      CAUTION
      If the brake pipe is tightened to the specified torque, it may be difficult to install it to the vehicle. Therefore, only temporarily tighten the brake pipe so that it can still be moved.

    2.  

  2.  
  3. Bleed the brake system

    Click image to see an enlarged view

    Fig. Location of HCU master cylinder brake pipe ports-Mazda6 and Mazdaspeed6

  4.  

 
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