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Makes 🢒 Cadillac 🢒 2008 🢒 STS 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Brake Pressure Modulator Valve Replacement

Brake Pressure Modulator Valve Replacement Without JL7

Removal Procedure

Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in the Preface section.

Notice: To prevent equipment damage, never connect or disconnect the wiring harness connection from the EBCM with the ignition switch in the ON position.

Notice: To prevent equipment damage, never connect or disconnect the wiring harness connection from the EBCM with the ignition switch in the ON position.

Important: 

   • The ignition switch must be placed in the OFF mode ONLY, before disconnecting the negative battery cable during this procedure. If the ignition switch is accidentally placed into ignition ON engine OFF mode, the control modules will be activated and disconnecting the negative cable will cause various DTCs to be set. Refer to Keyless Entry System Description and Operation.
   • After the ignition switch is placed into OFF mode, a waiting period of 2 minutes must be observed to allow the high-speed LAN control modules to deactivate before disconnecting or connecting the negative battery cable during this procedure. If the waiting period is not observed, one or more of these control modules may still be activated, causing various DTCs to be set.


    Object Number: 1906575 Size: SH
  1. Place the ignition switch into OFF mode. DO NOT place the ignition switch into ignition ON engine OFF mode.
  2. Wait a minimum of 2 minutes to allow the high-speed LAN control modules to deactivate.
  3. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  4. Thoroughly clean the area around the EBCM of all dirt and debris.
  5. Disconnect the secondary brake pressure modulator valve (BPMV) inlet brake pipe fitting (1).

    6. Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid loss and contamination.

  6. Disconnect the primary BPMV inlet brake pipe fitting (2).

    7. Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid loss and contamination.

  7. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  8. Remove the front air deflector shield. Refer to Front Air Deflector Replacement.
  9. Remove the washer solvent container fasteners and position the washer solvent container aside to access the electronic brake control module (EBCM). Refer to Windshield Washer Solvent Container Replacement.

    10. Object Number: 1906580 Size: SH
  10. Disconnect the LF brake pipe fitting (1).

    11. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.

  11. Disconnect the RR brake pipe fitting (2).

    12. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.

  12. Disconnect the brake fluid pressure sensor electrical connector.

    13. Object Number: 1906581 Size: SH
  13. Disconnect the LR brake pipe fitting (1).

    14. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.

  14. Disconnect the RF brake pipe fitting (2).

    15. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.


    Object Number: 1906582 Size: SH
  15. Remove the BPMV nuts (1) and the BPMV assembly.
  16. Release the EBCM electrical connector by pressing the retaining tab and rotating the locking lever forward.
  17. Inspect the BPMV insulators and replace if missing or damaged.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1906582 Size: SH
  1. Install the BPMV to the bracket.
  2. Install the BPMV nuts (1).

    3. Tighten
    Tighten the nuts to 10 N·m (89 lb in).


    Object Number: 899235 Size: SH
  3. Connect the EBCM electrical connector (1).
  4. Rotate the locking lever (2) rearward.
  5. Ensure the electrical connector and locking lever are fully engaged into the EBCM (3).

    6. Object Number: 1906581 Size: SH
  6. Connect the LR brake pipe fitting (1).

    7. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).

  7. Connect the RF brake pipe fitting (2).

    8. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).


    Object Number: 1906580 Size: SH
  8. Connect the LF brake pipe fitting (1).

    9. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).

  9. Connect the RR brake pipe fitting (2).

    10. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).

  10. Position the washer solvent container and install the fasteners. Refer to Windshield Washer Solvent Container Replacement.
  11. Install the front air deflector shield. Refer to Front Air Deflector Replacement.
  12. Lower the vehicle.

    13. Object Number: 1906575 Size: SH
  13. Connect the secondary BPMV inlet brake pipe fitting (1).

    14. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).

  14. Connect the primary BPMV inlet brake pipe fitting (2).

    15. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).

  15. Connect the brake fluid pressure sensor electrical connector.
  16. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding.
  17. Bleed the antilock brake system. Refer to Antilock Brake System Automated Bleed Procedure
  18. Perform the Diagnostic System Check - Vehicle.

Brake Pressure Modulator Valve Replacement With JL7

Removal Procedure

Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in the Preface section.

Notice: To prevent equipment damage, never connect or disconnect the wiring harness connection from the EBCM with the ignition switch in the ON position.

Notice: To prevent equipment damage, never connect or disconnect the wiring harness connection from the EBCM with the ignition switch in the ON position.

Important: 

   • The ignition switch must be placed in the OFF mode ONLY, before disconnecting the negative battery cable during this procedure. If the ignition switch is accidentally placed into ignition ON engine OFF mode, the control modules will be activated and disconnecting the negative cable will cause various DTCs to be set. Refer to Keyless Entry System Description and Operation.
   • After the ignition switch is placed into OFF mode, a waiting period of 2 minutes must be observed to allow the high-speed LAN control modules to deactivate before disconnecting or connecting the negative battery cable during this procedure. If the waiting period is not observed, one or more of these control modules may still be activated, causing various DTCs to be set.


    Object Number: 1906544 Size: SH
  1. Place the ignition switch into OFF mode. DO NOT place the ignition switch into ignition ON engine OFF mode.
  2. Wait a minimum of 2 minutes to allow the high-speed LAN control modules to deactivate.
  3. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  4. Remove the RH front compartment sight shield. Refer to Front Compartment Sight Shields Replacement.
  5. Thoroughly clean the area around the EBCM of all dirt and debris.
  6. Disconnect the secondary brake pressure modulator valve (BPMV) inlet brake pipe fitting (1).

    7. Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid loss and contamination.


    Object Number: 1906545 Size: SH
  7. Disconnect the primary BPMV inlet brake pipe fitting (1).

    8. Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid loss and contamination.

  8. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  9. Remove the front air deflector shield. Refer to Front Air Deflector Replacement.
  10. Remove the washer solvent container fasteners and position the washer solvent container aside. Refer to Windshield Washer Solvent Container Replacement.
  11. Disconnect the EBCM electrical connector

    12. Object Number: 1906546 Size: SH
  12. Disconnect the LF brake pipe fitting (1).

    13. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.


    Object Number: 1906547 Size: SH
  13. Disconnect the RF brake pipe fitting (1).

    14. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.


    Object Number: 1906549 Size: SH
  14. Disconnect the LR brake pipe fitting (1).

    15. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.


    Object Number: 1906551 Size: SH
  15. Disconnect the RR brake pipe fitting (1).

    16. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.


    Object Number: 1906552 Size: SH
  16. Remove the BPMV bolt (1).

    17. Object Number: 1906553 Size: SH
  17. Remove the BPMV (1).

Installation Procedure

    Object Number: 1906553 Size: SH
  1. Install the BPMV (1).

    2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1906552 Size: SH
  2. Install the BPMV bolt (1).

    3. Tighten
    Tighten the bolt to 11 N·m (97 lb in).


    Object Number: 1906551 Size: SH
  3. Connect the RR brake pipe fitting (1).

    4. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).


    Object Number: 1906549 Size: SH
  4. Connect the LR brake pipe fitting (1).

    5. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).


    Object Number: 1906547 Size: SH
  5. Connect the RF brake pipe fitting (1).

    6. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).


    Object Number: 1906546 Size: SH
  6. Connect the LF brake pipe fitting (1).

    7. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).

  7. Connect the EBCM electrical connector
  8. Position the washer solver container and install the fasteners. Refer to Windshield Washer Solvent Container Replacement.
  9. Install the front air deflector shield. Refer to Front Air Deflector Replacement.
  10. Lower the vehicle.

    11. Object Number: 1906545 Size: SH
  11. Connect the primary BPMV inlet brake pipe fitting (1).

    12. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).


    Object Number: 1906544 Size: SH
  12. Connect the secondary BPMV inlet brake pipe fitting (1).

    13. Tighten
    Tighten the brake pipe fitting to 27 N·m (20 lb ft).

  13. Install the RH front compartment sight shield. Refer to Front Compartment Sight Shields Replacement.
  14. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  15. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding.
  16. Perform the Antilock Brake System Automated Bleed Procedure.
  17. Perform the Diagnostic System Check - Vehicle.