Metro, Prizm 2000-2002

Hydraulic Control Unit

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Removal & Installation




CAUTION
To help avoid personal injury, due to a retained load on the brake modulator, the Gear Tension Relief function of the scan tool must be performed prior to removal of the ABS brake modulator assembly.

  1. Use the Scan Tool in order to perform the Gear Tension Relief Sequence.
  2.  
  3. Disconnect the 2 electrical connectors of the brake solenoid valve.
  4.  
  5. Disconnect the electrical connector of the Brake Motor Pack.
  6.  
  7. Place a shop towel beneath the hydraulic modulator brake pipes in order to prevent brake fluid from contaminating the motor pack or the electrical connectors.
  8.  
  9. Disconnect the brake pipes from the hydraulic modulator. Note the positions of the brake pipes.
  10.  
  11. Plug the brake pipes in order to prevent loss or in order to prevent contamination of the brake fluid.
  12.  
  13. Remove the 3 nuts and the hydraulic modulator/motor pack assembly from the vehicle.

    Click image to see an enlarged view

    Fig. ABS Brake Modulator/Motor Pack assembly-Metro

  14.  

To install:

  1. Install the hydraulic modulator assembly into the vehicle.
  2.  
  3. Install the hydraulic modulator assembly to the bracket mounting nuts and tighten to 48 inch lbs. (5.5 Nm).
  4.  
  5. Connect the brake pipes to the hydraulic modulator and tighten the tube nuts to 12 ft. lbs. (16 Nm).
  6.  
  7. Connect the electrical connector of the Brake Motor Pack.
  8.  
  9. Connect the 2 electrical connectors of the brake solenoid valve.
  10.  
  11. Bleed the system.
  12.  
  13. Perform the Diagnostic System Check - ABS.
  14.  

Refer to the procedures under Electronic Brake Control Module.

 
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