Escalade, Suburban, Tahoe, Yukon, Denali, DenaliXL, YukonXL 1999-2005

Control Module

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Removal & Installation




CAUTION
Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

  1. Remove the negative battery cable.
    NOTE
    The area around the EHCU MUST be free from loose dirt to prevent contamination of disassembled ABS components.

  2.  
  3. Thoroughly wash all contaminants from around the EHCU.
  4.  
  5. Disconnect the chassis electrical harness connectors from the EBCM.
    NOTE
    Make sure that brake lines are tagged and kept in order for proper reassembly.

  6.  
  7. Disconnect 5 brake lines from the BPMV.
  8.  
  9. Remove the bolts (4) securing the EHCU mounting bracket (3) to the frame rail (5).
  10.  
  11. Remove the EHCU assembly (1) from the vehicle.

    Click image to see an enlarged view

    Fig. Exploded view of EHCU and BPMV

  12.  
  13. Remove the bolts (4) securing the BPMV mounting bracket (5) to the BPMV (3).
  14.  
  15. Disconnect the 2 way ABS pump motor connector.
  16.  
  17. Remove the bolts (1) from the EBCM (2).
    NOTE
    Do not reuse the EBCM mounting bolts. Always install new bolts.

  18.  
  19. Remove the EBCM (2) from the BPMV (3). Removal may require a light amount of force.
  20.  
  21. Clean the EBCM to BPMV mounting surfaces with a clean cloth.
  22.  

To install:


NOTE
Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.

  1. Install the EBCM (2) onto BPMV (3).
    NOTE
    Do not reuse the old mounting bolts. Always install new bolts with the new BPMV.

  2.  
  3. Install the four EBCM bolts.
    1. Tighten the four bolts to 39 inch lbs. (5 Nm) in an X-pattern.
    2.  

  4.  
  5. Connect the 2 way ABS pump motor connector to the EBCM.
  6.  
  7. Install the BPMV (3) to BPMV bracket (5).
  8.  
  9. Install the BPMV to bracket retaining bolts (4).
    1. Tighten the bolts to 80 inch lbs. (9 Nm).
    2.  

  10.  
  11. Install the EHCU assembly to the vehicle frame.
    1. Tighten the three EHCU bracket bolts to 18 ft. lbs (25 Nm).
    2.  

  12.  
  13. Connect the chassis electrical harness connectors to the EBCM.
    NOTE
    The brake pipes are held in the proper place by a frame mounted plastic bracket. Make sure that the brake pipes stay in the correct place for proper reassembly.

  14.  
  15. Install the 5 brake pipes to the BPMV (6).
    1. Tighten the brake pipe fittings to 18 ft. lbs. (25 Nm).
    2.  

  16.  
  17. Connect negative battery cable.
  18.  
  19. Bleed the brake system.
  20.  

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the four T-25 TORX® screws that fasten the EBCM to the BPMV.
    WARNING
    Do not use a tool to pry the EBCM or the BPMV. Excessive force will damage the EBCM.

  4.  
  5. Partially remove the EBCM from the BPMV enough to access the electrical connectors. Removal may require a light amount of force.
  6.  
  7. Disconnect the four electrical connectors from EBCM.
  8.  
  9. Fully remove the EBCM from the BPMV.

    Click image to see an enlarged view

    Fig. Location of EBCM (Electronic Brake Control Module)



    Click image to see an enlarged view

    Fig. Removing Electronic Brake Control Module (EBCM) from Brake Pressure Modulator Valve (BPMV)

  10.  

To install:


NOTE
Do not reuse the old mounting screws. Always install new mounting screws with the new EBCM.


NOTE
Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.

  1. Install EBCM on to the BPMV.
  2.  
  3. Connect the four electrical connectors to the EBCM.
  4.  
  5. Install the four new T-25 TORX® screws in the EBCM and tighten to 39 inch lbs. (5 Nm) in an X-pattern.
  6.  
  7. Connect the negative battery cable.
  8.  
  9. Revise the tire calibration using the Scan Tool .
  10.  
  11. Check ABS for proper operation.
  12.  

  1. Disconnect the negative battery cable.
    NOTE
    The area around the EHCU MUST be free from loose dirt to prevent contamination of disassembled ABS components.

  2.  
  3. Thoroughly wash all contaminants from around the EHCU.
  4.  
  5. Disconnect the electrical connectors from the EBCM.
  6.  
  7. Loosen or remove 3 bolts securing the EHCU mounting bracket to the frame rail.
  8.  
  9. Gently move the EHCU down enough to remove the four mounting screws that fasten the EBCM to the BPMV.
  10.  
  11. Remove the EBCM from the BPMV. Removal may require a light amount of force.
    WARNING
    Do not use a tool to pry the EBCM or the BPMV. Excessive force will damage the EBCM.

  12.  
  13. Clean the BPMV to EBCM mounting surfaces with a clean cloth.

    Click image to see an enlarged view

    Fig. Location of EHCU-typical

  14.  

To install:


NOTE
Do not reuse the old mounting screws. Always install new mounting screws with the new EBCM.


NOTE
Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.

  1. Install the EBCM on to the BPMV.
  2.  
  3. Install the four new screws in the EBCM and tighten to 39 inch lbs. (5 Nm) in an X-pattern.
  4.  
  5. Install or tighten three EHCU bracket mounting bolts.
  6.  
  7. Tighten the EHCU bracket mounting bolts to 18 ft. lbs. (25 Nm).
  8.  
  9. Connect the electrical connectors to the EBCM.
  10.  
  11. Connect the negative battery cable.
  12.  
  13. Revise the tire calibration using the Scan Tool.
  14.  


CAUTION
Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.


NOTE
After installation, calibrate the new electronic brake control module (EBCM) to the tire size that is appropriate to the vehicle.

  1. Disconnect the negative battery cable.
  2.  
  3. Raise and properly support the vehicle.
    NOTE
    The area around the electric hydraulic control unit (EHCU) MUST be free from loose dirt to prevent contamination of disassembled ABS components.

  4.  
  5. Thoroughly wash all contaminants from around the EHCU.
  6.  
  7. Remove the mounting screws that fasten the EBCM to the brake pressure modulator valve (BPMV).

    Click image to see an enlarged view

    Fig. Exploded view of EBCM and BPMV-2005-06 models



    Click image to see an enlarged view

    Fig. Exploded view of the control module-2007 models

  8.  
  9. Remove the EBCM from the BPMV. Removal may require a light amount of force.
  10.  
  11. Remove the EBCM from the vehicle.
  12.  
  13. Clean the BPMV to EBCM mounting surfaces with a clean cloth.
  14.  

To install:


NOTE
Do not reuse the old mounting screws. Always install new mounting screws with the new EBCM.


NOTE
Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.

  1. Install the EBCM to the BPMV.
  2.  
  3. Install the new EBCM screws.
  4.  
  5. Lower the vehicle.
  6.  
  7. Connect the negative battery cable.
  8.  
  9. If a new EBCM was installed, the EBCM must be programmed.
  10.  
  11. Turn the ignition to the ON position. DO NOT start the engine.
  12.  
  13. Using a scan tool, perform the Diagnostic System Check - Vehicle.
  14.  

 
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