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Home >> Chevrolet >> 2000 >> Metro L4-079 1.3L VIN 2 MFI >> Repair and Diagnosis >> Brakes and Traction Control >> Hydraulic System >> Hydraulic Control Assembly - Antilock Brakes >> Service and Repair >> Brake Modulator Assembly Replacement
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Brake Modulator Assembly Replacement


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. Disconnect the 2 electrical connectors (1) of the brake solenoid valve.
3. Disconnect the electrical connector of the Brake Motor Pack.
4. Place a shop towel beneath the hydraulic modulator brake pipes (2) in order to prevent brake fluid from contaminating the motor pack or the electrical connectors.
5. Disconnect the brake pipes (2) from the hydraulic modulator (3). Note the positions of the brake pipes.
6. Plug the brake pipes in order to prevent loss or in order to prevent contamination of the brake fluid.





7. Remove the 3 nuts (5) and the hydraulic modulator/motor pack assembly from the vehicle.

Installation Procedure





1. Install the Hydraulic modulator assembly into the vehicle.

Notice: Refer to Fastener Notice in Service Precautions.

2. Install the hydraulic modulator assembly to the bracket mounting nuts (5).
- Tighten the mounting nuts of the hydraulic modulator bracket to 5.4 Nm (48 inch lbs.).





3. Connect the brake pipes (2) to the hydraulic modulator (3).
- Tighten the tube nuts to 16 Nm (12 ft. lbs.).
4. Connect the electrical connector of the Brake Motor Pack.
5. Connect the 2 electrical connectors (1) of the brake solenoid valve.
6. Bleed the system. Refer to Brake Bleeding.
7. Perform A Diagnostic System Check - ABS. Diagnostic System Check
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